WORLD OF COUPE CARS

Luxury CL 500 Coupé with all-wheel drive for first time

05.March, 2008 @20:03     Tech News


Even better traction on slippery surfaces
The latest-generation 4MATIC system

From summer 2008, Mercedes-Benz will also be offering all-wheel drive for its luxury CL-Class coupé for the first time. The new CL 500 4MATIC offers even greater traction and handling stability in the wet, in snow or on ice.

Mercedes-Benz is equipping the CL 500 4MATIC with the same latest-generation all-wheel drive system which is also proving its merit in the S-Class. 4MATIC is permanently active and therefore requires no response time to come to the driver's aid in unfavourable weather and driving conditions. As a result, critical situations can be mastered with greater ease.

The heart of the all-wheel drive system is a transfer case with a central differential, which has been integrated into the seven-speed automatic transmission. From here, the drive torque is split between the front and rear axle at a ratio of 45 to 55. Another new feature is the twin-plate clutch at the central differential. This produces a basic locking effect of around 50 Newton metres between the front and rear axle, which allows variable torque shift between the axles as the situation dictates and thereby achieves further significant improvements in traction and stability in the 4MATIC models.

Mercedes-Benz combines 4MATIC as standard with the Electronic Stability Program ESP® and the 4ETS traction system, which brakes spinning wheels as required, increasing the drive torque to the wheels with good grip. The automatic brake pulses which increase traction when pulling away on slippery surfaces and can improve active safety in critical situations are metered by the system on the basis of sensor signals.

This allows 4ETS to achieve the effect of conventional differential locks while offering more comfort than the technology found in other all-wheel drive cars. Weighing just 70 kilograms, the new permanent all-wheel drive system developed by Mercedes-Benz is the lightest drive system of its kind.

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