Performance software tuning:

Model Engine Stock power
Mercedes-Benz S 350 (W221) 3.0l CDI 155 kW / 211 HP Select
Mercedes-Benz S 350 (W221) 3.0l CDI 173 kW / 235 HP Select
Mercedes-Benz S 350 (W221) 3.0l CDI 190 kW / 259 HP Select
Mercedes-Benz S 350 (W221) 3.5l 200 kW / 272 HP Select