The new Mercedes-Benz M-Class: Chassis system - Dynamism meets comfort

The new M-Class: Effortless superiority whichever route you take

Besides the steel suspension with selective damping, there are also some new chassis developments and innovative dynamic handling control systems available, which are designed to enhance the driving experience in the M-Class. These include the AIRMATIC air suspension with Adaptive Damping System (ADS), the ACTIVE CURVE SYSTEM for active roll stabilisation and the ON&OFFROAD package with six driving modes. A comprehensive package of measures has also been included to ensure that the M-Class is at the forefront of its segment for acoustic and vibration comfort too.


A high level of comfort, dynamic on-road handling and excellent off-road capability are ingrained into the new M-Class as standard. The chassis of the steel-sprung M-Class now includes selective damping for the first time, meaning the shock absorbers' compensatory forces are of a flexible nature, rather than having a rigid setting. During normal driving on moderately uneven roads or off-road excursions at low speeds, the system is tuned for a gentler ride to the benefit of the occupants' sense of wellbeing and the vehicle's off-road abilities. In order to keep the occupants feeling at their ease when driving at a brisker pace or performing abrupt evasive manoeuvres, the dampers switch to a firmer setting in such circumstances for a high level of handling stability. The M-Class driver is helped here by an electric steering system that provides the optimum level of power assistance to suit the particular driving situation. The system therefore makes light work of parking or off-road manoeuvres by maximising steering assistance. The SUV also scores here with the tightest turning circle in its market segment. The 180-degree turn is negotiated within a circle diameter of just 11.8 metres. As the speed increases, however, assistance is reduced in favour of greater directional stability.

For those who want to venture off surfaced roads, the ML 350 BlueTEC 4MATIC and ML 350 BlueEFFICIENCY 4MATIC models offer a comprehensive off-road programme as part of their standard equipment. It includes the permanent all-wheel drive system 4MATIC and the electronic traction control system ETS, as well as an off-road button that activates a special off-road transmission mode.

- To improve traction, the wheel slip thresholds and the shift points of the 7G-TRONIC PLUS transmission are raised
- A flatter accelerator response curve enables more sensitive throttle control
- Off-road ABS ensures optimum braking characteristics, especially on loose surfaces

Start-off assist and the HOLD function are further features helping the driver to pull away on a slope. Downhill Speed Regulation, or DSR, enables the M-Class to maintain automatically the speed set via the cruise control lever.
For anyone wishing to go exploring off the beaten track even more in the new M-Class, there is the optional ON&OFFROAD package.

Comfort system: AIRMATIC air suspension with ADS

The AIRMATIC full air suspension system including the Adaptive Damping System (ADS) offers a soft basic suspension setup with a low natural frequency, where full spring travel is available even when the vehicle is fully laden. This provides the basis for excellent ride comfort on road combined with noticeably superior handling stability. AIRMATIC compensates for variations in vehicle load and driving state, at the same time as acting as a level control system. Away from the tarmac, the air suspension increases the vehicle's off-road prowess by offering additional ride heights. The body can be raised or lowered with the engine running at any time, either automatically or at the driver's request with a simple turn of the rotary control in the centre console. The system is speed sensitive, meaning that it lowers the body at higher speeds to minimise aerodynamic drag while increasing handling stability too. The air suspension system's basic components include:

- Air-filled spring struts on the front axle with integral ADS dampers
- Air springs with separate ADS dampers on the rear axle
- Electric compressor with central pressure reservoir and pressure sensor
- Air spring valves
- Electronic control unit
- Sensors for level control and damping control

The adaptive damping system ADS II is a fully automatic, electronically controlled system, which adapts the damping force at each wheel to suit changing requirements using a skyhook algorithm. In contrast to a passive system with a constant damper setting, the vehicle's motion is controlled uniformly in all driving situations, leading to improved handling stability and a considerable reduction in body movement. The skyhook algorithm regulates the damping forces at each wheel so as to lessen the forces exerted on the body by the movement of the wheels. When there are low levels of body excitation, the M-Class drives with damping level 1 active. Should the body speed exceed a certain threshold, however, the system will switch to the skyhook algorithm and constantly alternate between the second and third damping levels by means of fast-acting solenoid valves in order to counter the body's rolling and pitching movements. Under more dynamic handling conditions, level 4 is engaged, and when driving in Sport mode, level 4 damping is activated at all times. Damping control at each individual wheel takes place extremely fast – depending on the control command, the valves are capable of setting one of the characteristic curves described here in less than 0.05 seconds:

Level 1 Soft rebound/soft compression for comfortable ride characteristics, gentle body movements and little longitudinal and lateral acceleration
Level 2 Soft rebound/firm compression (skyhook mode)
Level 3 Firm rebound/soft compression (skyhook mode)
Level 4 Firm rebound/firm compression: for minimising wheel load fluctuations when cornering and braking, high longitudinal and lateral acceleration for enhanced handling safety

The current driving state is determined using a steering angle sensor, four turning angle sensors und the road speed as derived from the ESP® signal and the brake pedal switch. Based on these signals, the control unit calculates the current damping forces required and actuates the appropriate damper characteristic curves. The driver is able to choose between Sport and Comfort modes manually by pressing a switch.

New dynamic handling control system: cornering without rolling

Active roll stabilisation in the form of the ACTIVE CURVE SYSTEM can be optionally combined with both the AIRMATIC air suspension with Adaptive Damping System (ADS) and the ON&OFFROAD package. This system uses active anti-roll bars on the front and rear axles, which it controls automatically as a function of the lateral acceleration, road speed and the ADS Comfort/Sport switch setting. The ACTIVE CURVE SYSTEM compensates for the roll angle of the body through bends, greatly increasing agility and driving pleasure in the process. The system has the additional effect of increasing handing stability and therefore safety, particularly at higher speeds. Further benefits of the ACTIVE CURVE SYSTEM include even greater ride comfort both when cornering and driving in a straight line, together with enhanced off-road abilities. The various control strategies in detail:

- Comfort is improved when driving straight ahead as the rotary actuators decouple the two halves of the front and rear anti-roll bars in this situation, meaning that the anti-roll bars are "open" and do not react to a stimulus on just one side, such as bumps or potholes.

- Increased ride comfort and more dynamic handling when cornering, because the system actively influences the anti-roll bars' torsional moments and twisting angles. The anti-roll bars' torsional moment furthermore remains constant in response to a stimulus on one side, such as is the case when driving over a pothole on the outside of the bend. Thanks to the individual control at the front and rear axles, distribution of the roll momentum can be varied, allowing the self-steering properties to be actively adapted to the prevailing driving situation. The handling characteristics are adjusted for extra agility when driving along country roads and for even greater stability on the motorway.

- When driving in extreme off-road conditions at low speeds, the two anti-roll bars at the front and rear axles are decoupled. This leaves the anti-roll bars "open", allowing greater axle articulation.

The key componentry of the ACTIVE CURVE SYSTEM comprises a belt-driven hydraulic pump and an oil reservoir in the engine compartment, as well as a valve block and active anti-roll bars at both the front and rear axles. In contrast to a passive anti-roll bar, the active variant is split into two in the middle, and the two halves are connected with one another by means of hydraulic rotary actuators. Using the CAN signals relayed to it by pressure sensors and a lateral acceleration sensor, the electronic control unit regulates the hydraulic pressure.

The complex workings of the ACTIVE CURVE SYSTEM:

- The hydraulic pump feeds oil to the system from the oil reservoir.
- The pressure control valves and directional control valves integrated into the valve blocks at the front and rear axles set the desired pressure and twist the active anti-roll bars in the appropriate direction for the driving situation. Inside the hydraulic rotary actuators that are built into the active anti-roll bars there are six oil-filled chambers, three of which are pressurised for each direction of travel, i.e. a left or right-hand bend. The front valve block additionally assumes the task of distributing the oil flow between the two axles, irrespective of load.

Full programme: ON&OFFROAD package for all eventualities

The ON&OFFROAD package for the new M-Class uses six different driving modes to optimise driving dynamics and handling safety by providing the optimum drive control needed to cope with the wide spectrum of operating conditions encountered both on and off the road. The added benefit compared to the Off-Road Pro Engineering package offered previously is plain to see: whereas before there was one optimum driving mode for the road and one for off-road, drivers now have the choice of an automatic mode, as well as two specially programmed off-road and three on-road modes.

The specific driving modes for all-wheel drive resolve a conflict of objectives that has previously hampered further development of 4MATIC and the 4ETS electronic traction system as well as ESP® and ASR. To take an example: on off-road tracks, it is important that the control systems respond very gently due to the low friction coefficients, but this makes a sporty setup virtually impossible. Conversely, a sporty basic setup impairs performance abilities in off-road terrain. In the past, the engineers always succeeded in finding excellent compromises which worked brilliantly under all conditions and continue to do so. The new ON&OFFROAD package with its specific driving modes, however, enables driving dynamics and handling safety to be optimised almost as far as is physically possible under all operating conditions by maximising networking between the individual control systems.

The system is operated using a rotary control on the centre console, which adapts the AIRMATIC settings and the drivetrain to suit the specific requirements. The six driving modes in detail:

Automatic – covers the wide operating spectrum of everyday driving
Offroad 1 – light terrain, tracks, driving over fields
Offroad 2 – challenging off-road terrain with climbs
Winter – for driving in wintry conditions on roads affected by freezing rain, snow or ice, or with snow chains
Sport – for serious driving along winding roads
Trailer – optimises start-off, manoeuvring and braking characteristics when towing a trailer

Despite so many options, the driver is never in any doubt about mode selection: the setting is made intuitively, while the driving mode selected is visualised in the multifunction display as well as in virtually photo-realistic quality on the screen of the COMAND system. If the driver selects the Winter mode, for instance, the display shows the M-Class in snow. The Sport setting displays a racetrack with red-and-white curbs, while images of off-road terrain with different profiles appear for Offroad 1 and 2. The display is interactive too: steering input and spring travel correspond to the actual values, while the graphics include additional information on the steering, gradient and tilt angles, the AIRMATIC level, the pre-selected speed for Downhill Speed Regulation (DSR), as well as the selected drivetrain settings including reduction gear and differential lock.

Irrespective of which basic mode is set, the reduction gear, differential lock, DSR and the AIRMATIC system's level control can all be adjusted individually. As with the basic settings for the ON&OFFROAD package, it is not possible for the driver to make mistakes here either. Illogical settings, which would have a negative impact on handling stability, safety or traction, are precluded. If case of doubt, the system will revert to automatic mode.

In terms of "hardware", the ON&OFFROAD package comprises an underguard, a two-stage transfer case with reduction gear, an inter-axle differential lock and enhanced AIRMATIC functionality that allows a maximum ground clearance of 285 millimetres and a fording depth of 600 millimetres.

Off-road data at a glance*

Haven of calm: optimum vibration and acoustic comfort

By paying close attention to detail every step of the way, the development engineers in the Mercedes Technology Center have significantly improved what they call the NVH comfort level (Noise, Vibration, Harshness) for the new M-Class. This is a decisive parameter for the general sense of wellbeing on board, whilst also contributing to driver-fitness safety, especially on long journeys.

The basis for the high level of NVH comfort is provided by the very rigid SUV bodyshell of the M-Class. The development engineers were faced with some particular challenges here. For example, they had to make allowance for the optional panoramic glass sunroof's large aperture in the construction. The objectives set for drive comfort were no less ambitious. Substantial improvements have been achieved in this regard compared to its predecessor, thanks to features such as map-controlled, hydraulic engine bearings, a resized aluminium transmission cross member with integral vibration damper, as well as the overhauled 7G-TRONIC PLUS with twin-turbine damper and centrifugal pendulum. Potential noise penetration from the engine compartment through to the interior is minimised by a major assembly partition wall made from plastic and the intelligent use of soundproofing to suit requirements. Aero-acoustic enhancements include the vehicle glazing with its high-insulation acoustic windscreen, additional sealing in the side sections, plus the streamlined add-on parts such as the restyled exterior mirror housings.

The measures at a glance:

- Improved rigidity of the front end structure thanks to struts between the upper and lower levels of side members
- Hybrid construction of front module increases comfort at the same time as reducing weight
- Cockpit cross member made from particularly rigid magnesium alloy
- Intelligent use of soundproofing to suit requirements: in the production facilities, insulation is applied to the bodyshell very precisely by computer-controlled robots. Insulation with varying mass distribution in parts is used in the firewall area in accordance with the potential noise penetration
- Aluminium transmission cross member with integrated vibration damper on the diesel models
- Vibration-optimised 7G-TRONIC PLUS with twin-turbine damper, plus, on the diesel models, centrifugal pendulum
- Map-controlled engine bearings on the diesel models
- Decoupled exhaust system on the diesel models
- Standard chassis with selective damping, as an option: AIRMATIC air suspension with Adaptive Damping System or AIRMATIC air suspension with Adaptive Damping System and ACTIVE CURVE SYSTEM dynamic roll stabilisation
- Electric steering
- Major assembly partition wall made from plastic in order to minimise penetration of noise from engine compartment into the interior
- External noise minimised by acoustic encapsulation of engines
- High-insulation acoustic windscreen
- Additional aero-acoustic sealing in the side sections











Source: Daimler AG

Copyright © 2011, Mercedes-Benz-Blog. All rights reserved.

The new Mercedes-Benz Actros: Chassis and safety - Driving dynamics, comfort and safety systems at the highest level

A tough truck wouldn't be complete without brilliant underpinnings. The new Actros is equipped with a dynamic chassis based on a torsionally stiff frame with wide track. It integrates an intelligent concept which improves ride comfort and helps for a sensitive and firm steering for added fuel economy. The assistance systems provide extra safety and relieve stress when the truck is stuck in traffic. In the future, the range will be extended as the chassis was developed to properly fit new and additional wheelbase lengths.


Criteria such as handling and safety are becoming increasingly important in long-distance transport. The new Mercedes-Benz Actros takes account of this, ushering in a new era of driving dynamics for heavy-duty trucks. No other premium-category truck feels as poised, assured or safe on the road, largely thanks to a new frame and an extensively modified chassis. The new truck's exemplary ride comfort is at the same high level. A Mercedes-Benz is always extremely well prepared should the worst come to the worst: the already outstanding safety level has been further enhanced by extended functions. Last but not least, a perfected modular system means that the new Actros is available with a wide choice of wheelbase and frame variants. Plus it offers exceptional body-mounting ability.

Complete chassis and ride-comfort concept

Major plus points of the new Actros include its driving dynamics, handling and comfort, largely thanks to a complete chassis and ride-comfort concept, from the frame and the chassis through to the cab suspension and the driver's seat. A wealth of innovations in this field means that the new Actros conveys a safer driving feel than any other truck in its class.

Torsionally stiff frame with wide track

A new frame, uncompromisingly designed for on-road vehicles, forms the backbone of the new Actros. It is exceptionally torsionally stiff and has a wide track of 834 mm (previously 744 mm). Both factors together form the basis for excellent handling stability – the Actros hugs the road with an assured feel.

Tried-and-tested axles and a dynamic, new chassis

The core design of the tried-and-tested axles is the same as for the predecessor model; however, the developers have completely redesigned the control and the suspension to enhance driving safety and ride comfort.

New features include the location system for the Mercedes-Benz HL6 hypoid rear axle, based on optimised rear-axle location with new geometry and lines of action that now intersect behind the axle. Four-bellows air suspension, which responds precisely to road unevenness, is now responsible for the ride comfort. This is a symmetrical air suspension system (i.e. the bellows are of the same size). The spring track is wider than previously. Another advantage is the fact that four bellows operate faster and can lift higher loads than two bellows.

The tried-and-tested offset front axles are available with either steel or air suspension and with a choice of tonnages. The number of spring layers varies depending on the permissible axle load. The weight of the steel springs has been reduced thanks to an aluminium front spring bracket. New features include weight-optimised suspension with single-leaf parabolic springs on the front axle.

The chassis for the new Actros impresses with its high levels of directional stability, outstanding understeer/oversteer characteristics and high precision. Ride comfort has also been further enhanced.

Three cab mounting variants

The cab mounting is a major component in the driving-dynamics concept. There is a choice of three variants for the new Actros: Standard cab mounting, Comfort cab mounting (standard for cabs with a flat floor) and the exceptionally comfortable air suspension.

Sensitive and firm steering even saves fuel

One of the key factors behind the new Actros' excellent handling is the steering system, which impresses on account of its precision, thanks to a re-tuned steering gear, and conveys excellent road feel. The ratio is more direct whilst the kinematics have been improved and the controlled power steering pump saves fuel.

Powerful new engine brake and highly effective retarder

In 1996, the forerunner to the new Actros revolutionised the truck world on account of its four-disc brake system with a high-pressure system and electronic control. The new Actros takes this exceptional brake system a stage further. A new, optionally available high-performance engine brake sets new standards once again. The three-stage engine brake achieves an immense braking power of up to 400 kW (544 hp) on Euro VI models. Another new feature is the optionally available water secondary retarder with a braking torque of up to 3500 Nm or up to 750 kW. As well as being more powerful, the new retarder is lighter, weighing in at just 65 kg instead of 100 kg as previously.

Assistance systems to enhance comfort and relieve stress when stuck in traffic

The previous model series also set milestones with its safety and assistance systems. Whether it be adaptive cruise control, Lane Keeping Assist, Stability Control Assist or the revolutionary Active Brake Assist with autonomous emergency braking when stationary obstacles or moving obstacles ahead are detected, the Actros has always led the way for others to follow.

The new Actros builds on this lead. Stability Control Assist is now fitted as standard on both the semitrailer tractor and the chassis version, while the unique Proximity Control Assist system with stop-and-go function now even controls moving off and stopping in traffic automatically – making the driver's job much easier when driving through cities or in stop-and-go traffic. What's more, the Proximity Control Assist is no longer automatically linked to the retarder. The sensed fifth wheel coupling informs the driver of its lock status via a display in the cab. The exterior mirror with manoeuvring function on the co-driver's side extends the range of vision when manoeuvring by automatically adjusting outwards by ten degrees when reverse gear is engaged.

Standard equipment for all Actros models includes automatic activation of the hazard warning lights following an emergency stop so as to warn following traffic and help prevent rear-end collisions. The optional rain and light sensor activates the windscreen wipers and dipped beam when required, while the likewise optionally available tyre pressure monitoring system for the tractor and trailer is primarily aimed at enhancing safety: burst tyres as a result of insufficient inflation pressure are just as much of a safety risk as flat tyres. Furthermore, insufficient tyre inflation pressure increases the tyre's flex and, therefore, fuel consumption as well as reducing service life – a key factor when it comes to economy.

Attractively priced safety packages

Ready-made safety packages available at attractive prices encourage the inclusion of safety technology. The “Basic Safety Pack” comprises Proximity Control Assist, Lane Keeping Assist and a driver's airbag, while the Classic Safety Pack includes all of these as well as Active Brake Assist and roll control for dropsiders. Meanwhile, the Top Safety Pack features all of the above plus a retarder.

Range extended to include new and additional wheelbase lengths

The new Actros is a bespoke premium truck with an even larger range of models available than its predecessor. It can be ordered as a two- or three-axle version with trailing or leading axle and with a choice of three frame heights: standard, low and lowliner. Mercedes‑Benz has also further extended the range of wheelbase lengths by narrowing the gap between each version. Hence the two-axle semitrailer tractor is now available with a choice of four wheelbase lengths – 3550, 3700, 3850 or 4000 mm – while the two-axle chassis with cab gives customers a whopping eleven wheelbase lengths to choose from, ranging from 3600 to 6600 mm in steps of 300 mm.

Low-frame and lowliner models now have a slightly lower coupling point height, while the dropsider frame is also noticeably lower, making it easier to mount bodies.

Good body-mounting ability prioritised

The new Actros chassis already offers exceptionally good body-mounting ability as it is. The 50 mm hole pattern throughout in the frame side members, including the area of the axles, gives bodybuilders a great deal of freedom, as does the absence of rivets aft of the rear axle. Frame overhangs can be selected in steps of 300 mm, while the end crossmember can be relocated in 50 mm steps.

Although the exhaust system takes up more space on the frame due to the Euro VI requirements, optimised exhaust outlets make the bodybuilder's job easier. If required, space can be left within the frame – for demountable-platform vehicles, for example. In this case, there is no need to relocate the tank subsequently. Standardised fastenings, brackets and fixing bolts facilitate body mounting. All of which saves costs and shortens delivery times.

New chassis with new tanks

The wider frame, the in-line engines and the more complex exhaust gas aftertreatment system for Euro VI require a modified chassis design. The developers have taken this opportunity to introduce a new fuel tank concept among other things. Four tank cross-sections give a fuel supply volume of 290 to 1300 litres. The tanks are flexibly inter-combinable for individual solutions, and there are no conversion costs. Even the AdBlue tanks are available in a choice of sizes: 60 or 75 litres.

The main fuel tank and the AdBlue tank are mounted on the left-hand side of the vehicle. There is space for an additional tank on the right-hand side. The full vehicle width of 2.55 metres can be used to optimise the tank volume. There is also a combination tank with two chambers for diesel fuel and AdBlue available for semitrailer tractors.

Source: Daimler AG

Copyright © 2011, Mercedes-Benz-Blog. All rights reserved.

The new Mercedes-Benz Actros: Cockpit and interior - A new dimension in comfort, space and wellbeing

With the advent of the new generation of the Actros, Mercedes-Benz is ushering the entrance of the heavy duty truck into a class of its own, not just by means of the sensational exterior design, but also by admiring the fashionable and practical interior which offers multiple stowage compartments and is available in two trim lines: Home line for cosiness, Style line for dynamism. This is another aspect that sets the new Actros apart from its direct competitors. The modular system is one of the many key points of the cabin and it offers a choice of up to seven different long-distance cab variants. As the prime clients of the truck will be busy drivers, one of the major tasks was to create two distinct areas inside the vehicle: the working place and the living place, which are visually separated using colour and geometric form. When they are driving, truckers will appreciate the new cockpit perfectly designed around them and the comfy seat equipped with massage function for the first time. After a hard day's work, drivers will be able to rest and feel at home in the relaxation area entitled SoloStar Concept.


The new Mercedes-Benz Actros is custom-designed for long-distance transport like no other truck, setting new standards in terms of use of space, interior design and unerring attention to detail. The newly developed cab presented an opportunity to introduce a concept incorporating completely new interior ideas focussed on what drivers want and expect. For them, the cab is a workplace, a lounge and a bedroom all in one. The new Actros impressively shows how this can be achieved in an area of barely six square metres. At the heart of the interior concept are the easy-to-use cockpit and the comfortable living area, which are visually separate for the first time. With the new Actros, companies can offer their top drivers a top truck – with obvious results. After all, satisfied drivers are good drivers.

Modular system: seven long-distance cabs

A width of 2.3 or 2.5 metres, four roof variants and, without exception, the maximum possible length of 2.3 metres: behind these matter-of-fact figures lies the perfect modular system for the new Actros, with a choice of seven long-distance cabs. No other truck offers as many cab versions for long-distance transport.

Here, a cab has to meet different and in some cases contradictory requirements. The driver needs a functional workplace behind the wheel, a further space for writing when on the road, room for relaxing during breaks and when waiting around, and a comfortable bed for trips lasting several days and sometimes several weeks.

The new Actros offers a custom-designed cab for practically any eventuality – whether it be regional long-distance transport with occasional overnight stops, national long-distance transport involving several days of absence from home or international long-distance transport with trips sometimes lasting several weeks. The new Actros is the very first truck with a compact, 2.3-metre wide cab and a flat floor. It offers the full practicality and comfort of the 2.5‑metre wide cab – yet it is 50 kg lighter.

Dream space: flat floor in five of seven cabs

Whereas a flat cab floor was previously the reserve of flagship truck models, five of the seven cab variants for the new Actros feature a flat floor for the first time. In other words, every Actros for international long-distance transport can offer this impressive comfort feature, which gives the driver maximum room to move. A dream space becomes a reality in the new Actros.
Almost exactly the same is true of the two cab versions with an engine tunnel, although the term 'engine tunnel' is a slight exaggeration, as it is only 170 mm high and therefore hardly obstructs movement inside the cab.

Actros with GigaSpace cab – a new dimension

In terms of height, the only thing that limits the new Actros is legislation: the previous MegaSpace cab is replaced by the spectacular GigaSpace cab, which opens up a new dimension in space. It is all but four metres high and, when it comes to spaciousness, trumps its predecessor by some 920 litres – almost a whole cubic metre. This extra space is reflected in a headroom of 2.13 metres throughout and a noticeably larger stowage capacity. The total volume of 11.6 cubic metres is a record for a European truck cab.

The new range of seven cabs

The seven cabs for the new Actros in detail:

- The long ClassicSpace cab with a standard roof. 2.3 m wide, engine tunnel 170 mm. Headroom on the engine tunnel 1.46 m, in front of the co-driver's seat 1.59 m.
- The long ClassicSpace cab with a standard roof. 2.3 m wide with a flat floor. Headroom on the engine tunnel 1.64 m.
- The long StreamSpace cab. 2.3 m wide, engine tunnel 170 mm. Headroom on the engine tunnel 1.79 m, in front of the co-driver's seat 1.84 m.
- The long StreamSpace cab. 2.3 m wide with a flat floor. Headroom 1.97 m.
- The long StreamSpace cab. 2.5 m wide with a flat floor. Headroom throughout 1.97 m.
- The long BigSpace cab. 2.5 m wide with a flat floor. Headroom throughout 1.99 m.
- The long GigaSpace cab. 2.5 m wide with a flat floor. Headroom 2.13 m.

Extensive equipment and appointments for all cabs

Even the 2.3-metre wide ClassicSpace version includes the new colour concept for the interior, a multifunction steering wheel and a manually operated roof hatch as standard. All cab versions from the StreamSpace onwards also have an electrically operated tilting sunroof or, as an option, a tilting/sliding glass sunroof.

All versions of the new Actros with a flat floor also include comfort suspension for the cab, which can also be tilted electro-hydraulically. The steps are illuminated, while the door sections are extended downwards. Roller sun blinds, air conditioning and a compressed-air connection for cleaning the cab are likewise part of the extensive standard-equipment package.
In addition to all of this, the large BigSpace and GigaSpace cabs for the new Actros feature a comfort suspension seat, carpet between the seats and a sun screen. Plus the GigaSpace variant incorporates a tool stowage box under the cab, fog lamps, an additional drawer in the centre console and stowage flaps above the windscreen.

Working and living areas visually separated using colour and geometric form

The new approach results in highly practical concepts. For instance, the new Actros not only has plenty of stowage space, this stowage space is also precisely where the driver needs it. The same is true when it comes to room to move around: the designers have left plenty of space in the areas where the driver has to move or stand.

One new aspect is the visual separation of the workspace and living area by using different colours and geometric forms, developed specifically for the new long-distance Actros: the functional area around the cockpit is finished in practical anthracite whilst the rear, ceiling and area around the co-driver's seat are appointed in a light almond beige colour. As well as looking welcoming and cosy, it makes the space appear larger and creates a pleasantly airy and roomy feeling. Another advantage is the fact that the light colour shade heats up less in sunlight. The Actros shares this contemporary colour with top-of-the-range passenger cars such as the Mercedes‑Benz S-Class, CLS and SL.

Further enhanced material quality

The cab designers have further enhanced the already renowned and exemplary material quality. All the components have been designed with the utmost care, with one eye on practicality and the other on looks. The soft feel and the in-house-developed grain of the plastic surfaces in the upper area of the instrument panel as well as on the door linings, A-pillars and roof stowage boxes are reminiscent of leather. Many of the materials used in new Actros would not look out of place in a luxury passenger car, such is their quality. Longevity is also assured thanks to a robust, scratch-resistant and easy-care design.

In-house-developed driver's seat, with massage function for the first time

The driver's seat was likewise developed specifically for the new Actros. The width of the seat cushion has been increased by 40 mm compared to the previous version and, with an exterior width of 550 mm, is by far the largest in this class. The range of the now two-stage fore/aft adjustment system has also been increased: 190 mm or 250 mm after the lower bunk is folded up, meaning that drivers of any size can find their optimum sitting position. The seat height adjustment range has likewise been extended – by 20 mm. Further aspects developed specifically for the new Actros include the controls for the many adjustment options, which are now intuitive as well as being visible from above.

There are four different versions of the driver's seat available (rigid seat, suspension seat, comfort suspension seat and climatised suspension seat) as well as three versions of the co-driver's seat (regular seat, comfort suspension seat and climatised suspension seat). The top-of-the-range seat with a massage function (available from 2012 onwards) is unique: at the push of a button, seven air cushions arranged one on top of the other in the backrest pulse for ten minutes. This function helps to relieve tension on very long trips.

Buyers can choose from a wide range of seat covers: flat-weave fabric, velour, artificial leather, leather and the particularly soft and smooth Dinamica Star covers in black or almond beige. The latter, which will be familiar to Mercedes-Benz passenger car drivers, has a surface structure reminiscent of Alcantara, while the leather seats in the new Actros have a diamond pattern and double-lapped felling in a contrasting colour.

A new cockpit perfectly designed around the driver

The all-new cockpit promotes focussed yet relaxed driving. It is designed based on the latest ergonomics research and focuses on the driver, with all the controls lying within easy reach. Its asymmetric form curves towards the driver, conveying a feeling of self-assurance and safety. The instruments and all the controls are new developments and, in terms of looks and feel, are on a par with those seen in Mercedes-Benz passenger cars. Thanks to their intuitive design, they allow direct access to all the relevant information.

The standard-fit multifunction steering wheel with an easy-grip rim is reminiscent of the one used in the current generation of Mercedes‑Benz passenger cars in terms of both its look and its control buttons. A foot-operated switch is now used to adjust the steering wheel, while the steering wheel itself has a far greater adjustment angle than in the already tried-and-trusted previous Actros model.

Easy-to-read circular instruments, informative colour display

The newly developed instrument cluster incorporates the speedometer and rev counter in the form of large, circular instruments, while smaller circular instruments are integrated for the fuel and coolant-temperature gauges.

Between the instruments, a large colour screen with graphics capability and clear, intuitive menus provides a wealth of information. There are two versions available – one with a width of 10.4 cm and an optional Highline variant which is 12.7 cm wide. If a reversing camera is specified, the images it captures appear on the large central display. Further integrated features include a trip computer for recording all the key data on the current trip. This is also where, as standard, the driver receives short-time analyses and tips about current driving style through the FleetBoard EcoSupport function.

Steering column stalk for the transmission, start/stop button for the engine

Should the driver ever wish to manually override the standard-fit Mercedes PowerShift fully-automated transmission, this is done via a steering column stalk rather than a gear lever – so through-cab access remains unimpeded.

Another new function for the new Actros is the start/stop system: customers can order a special multifunction key which performs certain functions to ease the driver's workload, such as the level control on the front or rear axle, display of the tyre inflation pressure, axle loads and fill levels as well as convenience functions such as activation of the auxiliary heater, the auxiliary air conditioning or the radio.

When the ignition is switched on in the new Actros, the needles on the speedometer and the rev counter spin to their limit positions briefly. A separate start/stop button on the instrument panel is used for starting and stopping the engine in the new Actros, while the handy parking brake lever is positioned within easy reach in the centre console.

Using a tried-and-tested solution, the tachograph is positioned over the windscreen above the driver's head. This is also the designated location for any CB radio that may be fitted. Another aspect of the cockpit concept for the new Actros is the wealth of practical stowage options: intelligently conceived spaces for drinks bottles up to 1.5 litres, papers, a coat, a towel and oddments such as sunglasses. Large-surfaced stowage areas are ideal for a coffee maker or a television, while a folding table can be integrated in the instrument panel support on the co-driver's side.

The new Actros as a concert hall: radio with sound system

The radio in the new Actros is positioned within the driver's reach and field of vision. A USB connection is provided with the standard version. Other versions include a CD player or a CD player with Bluetooth connection, while there is also an even higher-spec luxury version available. A numeric keypad makes it easier to operate the telephone functions and the radio. What's more, two-way loudspeakers with even better sound quality are available as an alternative to the standard speakers.

The optional sound system transforms the new Actros into a concert hall. An active subwoofer in a bass reflex loudspeaker, two broadband speakers, two woofers/mid-range speakers and two separate tweeters provide musical entertainment of the highest calibre.

Two sockets in the co-driver's footwell and one behind the driver's seat supply other electrical consumers with power. Among the other available sockets, the power socket – for a television or a microwave oven, for example – stands out with its magnetic plug connection for heavy-duty consumers with 24 volts and a maximum of 25 amperes.

Heating with residual engine heat utilisation

Cab ventilation is draught-free, the air arriving through new-look air outlets. The heating system for the new Actros is air-controlled, operates effectively and responds quickly. New features include the optional residual engine heat utilisation: here the coolant's waste heat is used to heat the cab for up to two hours – more than enough to keep the cab at a pleasant temperature during breaks or whilst waiting around – without having to activate the auxiliary heater and use fuel unnecessarily.

The auxiliary heater for the new Actros is located in the engine compartment, where it is decoupled from the cab. Two variants are available: an auxiliary heater exclusively for the cab with an output of 3.8 kW or a heater for the cab with an output of 9 kW combined with an engine pre-heater. The latter has separate controls for the cab and engine with fully automatic temperature control, an exhaust air quality sensor, and a smog and air recirculation mode.

Prime climes thanks to air conditioning, automatic climate control and auxiliary air conditioning
All new Actros models include Tempmatic air conditioning with automatic temperature control as standard, while automatic climate control with a digital display is available as an option.

Further options for the new Actros include the popular auxiliary air conditioning, which stores the cold produced whilst driving and can use this to control the temperature in the cab for up to eight hours after driving. It features temperature control as well as a charge indicator in the control panel.

Interior lighting: practical or cosy – as the situation demands

The interior lighting for the new Actros is all about practicality and cosiness. The step lighting and the entrance lights in the door panelling safely light the way into the cab, while two ceiling lights illuminate the interior when stronger lighting is required, for instance when changing clothes. Lighting in the driver's area makes it easier to study documents here, for example.

The non-reflective green night lighting in the new Actros creates a pleasant atmosphere when driving in darkness. During breaks, the indirect blue ambient lighting with its effective and discreet LED fibre optics between the stowage compartments and the roof creates a pleasant environment. The new Actros has even more LEDs here than its predecessor.

Unique: the new SoloStar Concept as a relaxation area

In contrast to the highly practical cockpit, the living area in the new Actros has an open-plan design wherever possible. Unique features include the newly developed, optionally available SoloStar Concept for the new Actros, which creates an all-new calm zone and ensures optimum recuperation. This comfortable relaxation area on the co‑driver's side is shaped like a corner sofa unit and is set back against the rear wall. There's plenty of room to move: even tall drivers can stretch their legs and sit comfortably during longer breaks. To make it even easier to move around, the lower bed can be folded at the rear wall. The driver can fold out a table from its underside, which can be used for either writing or dining.

The seat in the SoloStar Concept is likewise equipped with a three-point seat belt and a head restraint, meaning that it can be used without restrictions whilst driving. So co-drivers or companions are always made to feel very welcome.

Large beds offering the comforts of home

The beds in the new Actros are also new. Even in the models with a 2.3-metre wide cab, the comfort bed behind the driver's seat measures 2000 x 750 mm and offers plenty of space for even tall drivers. In the 2.5-metre wide cabs, the dimensions increase to a whopping 2200 x 750 mm – so even exceptionally tall drivers will have more than enough room.

The comfort bed's full-length seven-zone cold-foam mattresses, which are around eleven centimetres thick, offer the same level of comfort as a high-quality bed at home. Integrated spacer fabric in the lower area ensures underside ventilation. Back height adjustment allows any driver to find a comfortable position for reading or watching television. The even more lavish PremiumComfort mattress impresses by virtue of its multi-zone structure with integrated tubular elements.

Two different variants are available for the upper bed. The version measuring 2200 x 600 mm with a restraint system can also be used by the co-driver whilst the vehicle is being driven. The wide version (2200 x 750 mm) is like the mattress for the lower bed. If the new Actros is not parked on the flat, the bed can be levelled using a spirit level.

New stowage space concept with asymmetric roof stowage compartments

The newly designed Actros cab also presented an opportunity to develop an all-new and sophisticated stowage-space concept. Whether it be large or small items, clean or dirty washing or valuables – practically anything can be carried safely and tidily on board the Actros.

Perhaps the most impressive of all the stowage options are the asymmetric compartments above the windscreen in the new Actros BigSpace and GigaSpace (for left-hand-drive vehicles). Located above the driver's area they are drawn into the cockpit and are very deep, whereas the shallower stowage compartments on the co-driver's side allow full headroom and plenty of space to move. In the Actros GigaSpace, the three closed and illuminated stowage compartments together hold 332 litres, equivalent to the size of the boot in a compact passenger car. When the further stowage compartments around the cockpit and the two large stowage compartments under the bed (420 litres combined) are also factored in, the total stowage space adds up to 975 litres, meaning that the Actros GigaSpace has easily the largest stowage capacity in its competitive environment.

Even the more compact cabs offer plenty of stowage space. For instance, the three stowage compartments above the windscreen in the new Actros StreamSpace cab measuring 2.3 metres wide can hold an impressive 137 litres of luggage. Then there are the two closed stowage compartments under the bed and an additional stowage space in the middle under the bed, making a total of 580 litres.

Practical stowage facilities, large stowage compartments under the bed

All versions of the new Actros offer impressive stowage space. A drawer in the centre console can hold A4 papers. Above this, large and flat surfaces are ideal for a laptop or a coffee maker.
The two closed compartments under the bed are accessible from outside and inside, plus they are illuminated. These stowage compartments under the bed hold 595 litres in the 2.5-metre wide cab with a flat floor, meaning that the new Actros trumps its predecessor by around 40 percent and offers a cargo volume on a par with the Mercedes-Benz E-Class Estate. The outside flaps, meanwhile, are large enough for stowing drinks crates.

A wealth of individual appointments

The stowage space in the new Actros is not just impressive on account of its sheer volume, it also boasts an attractive design and a range of individualisation options. Options include a lockable stowage compartment above the windscreen and, for the BigSpace and GigaSpace cabs, optional flexible shelving for the central stowage compartment. A safe can also be installed. There are drawers in the centre under the bed as well as the option of oddments trays for the stowage compartments.

A coolbox holding 25 litres can be installed on the engine tunnel as an option. Alternatively, the coolbox can be housed in the pull-out tray under the bed (capacity 26 litres). Models with a flat floor can even be equipped with a 36-litre refrigerator – large enough to store drinks bottles upright.

Towel rail and shaving mirror on board again

Details makes the new Actros cab a bona fide living area. Like its predecessor, the new Actros features a towel rail – but now it is wide enough to not have to fold towels, so they dry quicker – housed in the compartment above the co-driver's side. A shaving mirror is also included once again, although this can now be attached at the driver's preferred location thanks to its flexible and versatile bracket. To the side of the driver's door, there is a spectacles compartment, while retractable coat hooks are located to the left and right of the stowage compartments.

New lines: Home line for cosiness, Style line for dynamism

Like the Mercedes-Benz passenger cars, the new Actros interior can be visually enhanced and individualised by specifying one of two different lines.

The Home line emphasises the cosiness of the new Actros. It includes inside door handles with a wood look and trim strips in the cockpit. Plus there is a leather steering wheel, with the option of a wood/leather steering wheel. Velour carpet inserts between the seats and door panels dotted in almond beige round off the Home line.

The Style line, on the other hand, emphasises the dynamic aura of the new Actros with chrome-look inside door handles as well as trim strips on the cockpit, steering wheel, ventilation outlets and steering column stalk. Rather than being fashioned from painted plastic, for example, the chrome-style parts are made of real metal with a "Silver Shadow" look, and they help to further enhance the high-class appeal of the new Actros. Velour carpet inserts between the seats and velour interior door panels in black/silver complete the interior. On the outside, the new Actros with Style line has an extrovert character thanks to a chrome highlight on the sun screen, chrome covers on the mirror housings, the illuminated Mercedes star, the ambient lighting, the fog lamps and the LED daytime driving lights. Both design and equipment lines feature a white instrument panel and a leather sleeve for the handbrake valve.

A wealth of comfort available at an attractive package price

Three attractively priced packages make a high level of comfort on board the new Actros easily affordable. They also make it easier for customers to choose their options by combining typical items of special equipment. The Basic Comfort Pack includes an enhanced central locking system, a two-piece electric roller blind, ambient interior lighting and two-way loudspeakers.

Over and above this, the Classic Comfort Pack includes a lockable stowage compartment above the windscreen, an additional drawer in the centre console, air horns, side roller sun blinds at the top of the door windows, a leather steering wheel and an electrically operated tilting/sliding sunroof.

The Top Comfort Pack additionally includes a sound system, a Highline instrument cluster, a shelf for the roof compartments, automatic climate control, a refrigerator in the drawer under the bed and the illuminated Mercedes star in the radiator grille.























Source: Daimler AG

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