- More design: a new design language for the second generation
- More efficiency: up to 25 percent lower fuel consumption
- More agility: lightweight construction and new electromechanical power steering
- More visibility: LED High Performance headlamps
- More safety: Active Blind Spot Assist and Active Lane Keeping Assist
A generation ahead: with the CLS, Mercedes-Benz created a new vehicle category in 2003 which for the first time combined the elegance and dynamism of a coupé with the comfort and functionality of a saloon. The customers were delighted, the competition taken aback: for many years the CLS remained the only four-door coupé in its class and since October 2004 it has been the car of choice for some 170,000 buyers around the globe. “Customers all over the world have rewarded us for our courage in launching a completely new vehicle concept onto the market,” explains a delighted Dr Joachim Schmidt, Head of Sales & Marketing for Mercedes-Benz. “And with its exciting design and refined sportiness, the new edition of the CLS also benefits from the fact that we are a whole generation ahead of the competition with our four-door Coupé.”
Efficiency at the highest level: that is what characterises all four engines deployed in the Mercedes-Benz CLS. The output and torque of each engine is greater than in its predecessor; at the same time, fuel consumption has been drastically reduced, by up to 25 percent. The CLS 350 CDI BlueEFFICIENCY with 195 kW (265 hp) and the CLS 350 BlueEFFICIENCY with 225 kW (306 hp) and the ECO start/stop function as standard. The CLS 250 CDI BlueEFFICIENCY with 150 kW (204 hp). In the ECE fuel consumption test cycle it requires a mere 5.1 l/100 km (46.12 mpg US, 19.6 km/l) of diesel. The CLS 500 BlueEFFICIENCY, with a V8 engine and 300 kW (408 hp). Both drive variants also have the ECO start/stop function as standard.
Intelligent lightweight construction plays a decisive role in bridging the classic conflict of objectives between low weight and high strength in the new CLS. The CLS is thus the first vehicle from Mercedes-Benz to have frameless, all-aluminium doors. These are made from deep-drawn aluminium panels with extruded sections, and in comparison with conventional steel doors, are some 24 kilograms lighter. Apart from the doors, the bonnet, front wings, boot lid, parcel shelf, various support profiles and substantial parts of the suspension and engines are all made of aluminium.
Aerodynamics play an important part in the outstanding efficiency of the Mercedes-Benz CLS. Although the new model is wider than its predecessor and thus presents more frontal area to the wind, it was possible to reduce wind resistance by up to ten percent. This is thanks to the Cd value of 0.26, which has been improved by 13 percent.
Marrying the ultimate in driving dynamics to the very best in long-distance ride comfort, was the challenge set for the designers and developers of the suspension system for the new Coupé, which aspires to be the epitome of stylish sportiness in both form and function. To achieve this, the suspension system, which had already attracted the highest praise from both the trade press and the public when introduced with the new E-Class, was completely re-tuned and enhanced with a key new component: the electromechanical power steering system makes its world debut in the new CLS. This pioneering innovation makes a new and radical contribution to the relationship between driver, car and road: engineers have, for the first time, been given the freedom to select and to program many of the parameters which influence the steering feel.
In addition, the steering system makes an important contribution to the CLS’ overall efficiency: as the steering support system only uses energy when the vehicle is actually being steered, fuel consumption is cut by up to 0.3 litres/7 g of CO2 compared to the previous model.
For the front suspension, the concept of a three-link front axle design was chosen – just as for the E-Class – and was especially developed for the new CLS. The principle of a lightweight-construction multi-link rear suspension which is attached to a subframe, as used in the new E-Class, was adopted for the CLS as a result of its unsurpassed wheel location qualities. In comparison to its predecessor, all the components have been modified to give both greater comfort and better driving dynamics.
The CLS is the first passenger car in the world to offer LED High Performance headlamps, which combine the exciting colour elements of LED technology – similar to those of daytime running lamps – with the performance, functionality and energy efficiency of today’s bi-xenon generation (as an optional extra). This new light system provides, for the first time ever, the Intelligent Light System already proven in Mercedes models fitted with bi-xenon headlamps in combination with LED technology. The headlamps, with their 71 LED lamps in total, look exciting; and they serve to underline the unmistakable appearance of the CLS. The light specialists from Mercedes-Benz have for the first time been able to use LED technology in the admired and innovative Adaptive Highbeam Assist, resulting in an entirely new level of safety for night-time driving.
In contrast to the first vehicles equipped with LED headlamps, no compromises are now necessary with respect to the functionality and performance of the lighting technology. There are further arguments for the LED-based lighting technology: the average operating life of an LED is around 10,000 hours, around five times longer than that of a xenon light; moreover, LED headlamps most closely approximate to the colour of daylight. This means that LED light is in keeping with the normal human perception patterns and that the driver experiences significantly more brightness on the road at night. Studies have shown that the closer the colour of artificial light comes to daylight, the less the strain on the eyes. With a colour temperature of 5500 kelvin, LED light is closer to daylight (6500 K) than xenon light (4200 K).
New driving assistance systems: greater safety
More than a dozen driving assistance systems on the new CLS help to prevent traffic accidents and reduce the severity of an accident. The Active Blind Spot Assist and the Active Lane Keeping Assist are new.
Active Blind Spot Assist warns the driver if – with the assistance of short-range radar sensors – it detects that there is a danger of collision if the vehicle is about to change lanes. Should the driver ignore the warnings and the vehicle come dangerously close to the next lane, Active Blind Spot Assist will intervene. By applying braking force to the wheels on the opposite side of the vehicle via the Electronic Stability Program ESP®, a yaw movement is created which counteracts the collision course.
Active Lane Keeping Assist is now also linked to ESP® for the first time. This system kicks into action if the Mercedes vehicle inadvertently drifts over a solid line to the right or left of a lane. In this case, Active Lane Keeping Assist uses the ESP® to gently brake the wheels on the far side and thereby bring the vehicle back on course. A display on the instrument cluster warns the driver at the same time. If broken lane markings are crossed, the system controls an electric pulse generator in the steering wheel which generates vibrations for a short time – a discreet but highly effective cue to countersteer immediately. Before the braking system intervenes, the steering wheel always vibrates to provide a warning.