Performance software tuning:

Model Engine Stock power
Mercedes-Benz C 230 (W203) 1.8l K 141 kW / 192 HP Select
Mercedes-Benz C 230 (W203) 2.3l K 142 kW / 193 HP Select
Mercedes-Benz C 230 (W203) 2.5l 150 kW / 204 HP Select