As with the other AMG high-performance cars, the engine power is transferred to the wheels via the AMG SPEEDSHIFT five-speed automatic transmission. This allows the driver to choose between fully automatic or manual gear changes, the latter being possible by using either the selector lever or the gearshift buttons on the ergonomic AMG sports steering wheel. The power plant is superbly complemented by the AMG sports suspension and by the AMG high-performance braking system. The CLS 55 AMG features AIRMATIC DC semi-active air suspension with an adaptive damping system; this suspension set-up has been specially modified for AMG by giving it tauter tuning. Large, internally ventilated and perforated brake discs make for impressive deceleration and high fading resistance.