The GL 63 AMG is powered by AMG hand-built M157 engine, which has same output as an ML 63 with optional Performance package. Thanks to 557 hp V8, it manages the 0–100 km/h sprint in 4.9 seconds and the top speed is 250 kilometres per hour (160 mph). It features a start-stop system and 557 hp are transmitted by the AMG SPEEDSHIFT PLUS 7G-TRONIC gearbox. It has three modes: “Controlled Efficiency” (start-stop system is active and in this mode it accelerates in 2nd gear), “Sport” and “Manual”. The AMG model is equipped with AMG RIDE CONTROL, combined with AIRMATIC and ACTIVE CURVE SYSTEM with three modes: “Comfort”, “Sport” and “Sport plus”. The air suspension is active and it lowers the car at higher speeds.