The Mercedes C 270 CDI 163hp (W203 - 2000 - 2004) produces 163bhp and 370Nm in standard form. Our Stage 1 ECU tuning file raises output to 200bhp and 450Nm, a gain of 37bhp and 80Nm, with no hardware modifications required. The file is delivered through the ByteFLASH portal and is ready to write to the vehicle.