The Mercedes C 350i 272hp (W204 - 2007 - 2010) produces 272bhp and 350Nm in standard form. Our Stage 1 ECU tuning file raises output to 290bhp and 375Nm, a gain of 18bhp and 25Nm, with no hardware modifications required. The file is delivered through the ByteFLASH portal and is ready to write to the vehicle.