The Mercedes E 300 CGi 252hp (W212 - 2013 - 2016) produces 252bhp and 340Nm in standard form. Our Stage 1 ECU tuning file raises output to 312bhp and 390Nm, a gain of 60bhp and 50Nm, with no hardware modifications required. The file is delivered through the ByteFLASH portal and is ready to write to the vehicle.