ZF Lenksysteme GmbH supplies the electric power steering to the new Mercedes-Benz CLS, improving fuel consumption by up to 0.3 liters per 100km (a 7 grams per kilometer reduction in CO2) compared to the previous generation model based on tests in Europe. Unlike conventional hydraulic power steering systems, the new design only uses energy during steering, consequently saving fuel. The steering gear and supporting servomotor comprise a single unit mounted on rigid high-strength steel, positioned in front of the wheel's center line.
Mercedes also improved fuel use in the new CLS by reducing its weight. The second-generation CLS is the first Mercedes to have frameless all-aluminum doors, reducing the vehicle's weight by 24kg (about 53 pounds) than if it were built using doors made of steel. Novelis Inc. supplies aluminum (predominantly its AC-300 and AC-170PX aluminum alloys from its sites in Nachterstedt, Germany, and Sierre, Switzerland) to Mercedes for the production of the doors and other components.
Reducing the weight of the doors also makes them easier to open and close, particularly important when parked on a slope. This new design required different joining techniques such as gluing and riveting, instead of welding. A surface treatment developed by Novelis called TAF (Thin-Anodised-Film) made the gluing of structural parts possible.
The new CLS' engines are also more efficient than in the previous generation, each providing greater output and torque than its predecessor but with a reduced fuel consumption of up to a quarter. Some variants have stop-start technology.
Mercedes assembles the CLS at its plant in Sindelfingen, near Stuttgart. Prices in Germany start at 60,939.90 euros (about $85,400).