The Mercedes C 300 CDI Hybrid 231hp (W205 - 2014 - 2018) produces 231bhp and 550Nm in standard form. Our Stage 1 ECU tuning file raises output to 260bhp and 610Nm, a gain of 29bhp and 60Nm, with no hardware modifications required. The file is delivered through the ByteFLASH portal and is ready to write to the vehicle.