The Mercedes E 400d 340hp (W213 - 2016 - 2019) produces 340bhp and 700Nm in standard form. Our Stage 1 ECU tuning file raises output to 380bhp and 820Nm, a gain of 40bhp and 120Nm, with no hardware modifications required. The file is delivered through the ByteFLASH portal and is ready to write to the vehicle.