Performance software tuning:

Model Engine Stock power
Mercedes-Benz S 500 (W221) 4.7l Biturbo 300 kW / 408 HP Select
Mercedes-Benz S 500 (W221) 5.0l 285 kW / 387 HP Select
Mercedes-Benz S 500 (W221) 5.5l V8 285 kW / 387 HP Select