The Mercedes C 63 AMG Edition 507 (W204 - 2010 - 2014) produces 507bhp and 610Nm in standard form. Our Stage 1 ECU tuning file raises output to 515bhp and 650Nm, a gain of 8bhp and 40Nm, with no hardware modifications required. The file is delivered through the ByteFLASH portal and is ready to write to the vehicle.