Cannes, Sep 7, 2010 - Exciting cutting-edge technology from Affalterbach: the Mercedes-Benz S 63 AMG and the CL 63 AMG are to benefit from a completely newly developed powertrain. The AMG 5.5-litre V8 biturbo engine with a peak output of up to 420 kW (571 hp) and a torque of up to 900 Nm, in combination with the unique AMG SPEEDSHIFT MCT 7- speed sports transmission, contributes towards a considerable reduction in consumption and emissions, while at the same time increasing maximum power and torque.