The Mercedes C 280 CGI 231hp (W204 - 2007 - 2010) produces 231bhp and 300Nm in standard form. Our Stage 1 ECU tuning file raises output to 250bhp and 320Nm, a gain of 19bhp and 20Nm, with no hardware modifications required. The file is delivered through the ByteFLASH portal and is ready to write to the vehicle.