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2008 Paris Auto Show Peugeot RC Hybrid Concept

Mercedes is planning to offer a hybrid S-class starting in 2009. The S400 BlueHybrid, a mild hybrid powered by M-B’s 3.5-liter V-6, boasts a lithium-ion battery co-developed with supplier Continental and described by Daimler R&D boss Thomas Weber as “a crucial breakthrough.”

Unlike Lexus’s LS600hL, the S400 is not aimed at the performance market. Instead, it uses its hybrid drivetrain solely for the traditional aim of fuel efficiency. Mated in the style of a mild hybrid with a 20-hp electric motor and a lithium-ion battery pack, the V-6 will turn off while the car is stationary and kick back on when the driver wants the car to move. Under braking, the batteries are charged. The electric motor can’t propel the S400 on its own but assists in acceleration.

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