The Mercedes C 200d 150hp (W205 - 2018 - 2021) produces 150bhp and 320Nm in standard form. Our Stage 1 ECU tuning file raises output to 200bhp and 440Nm, a gain of 50bhp and 120Nm, with no hardware modifications required. The file is delivered through the ByteFLASH portal and is ready to write to the vehicle.