The Mercedes E 400 CDI 260hp (W211 - 2002 - 2006) produces 260bhp and 560Nm in standard form. Our Stage 1 ECU tuning file raises output to 300bhp and 630Nm, a gain of 40bhp and 70Nm, with no hardware modifications required. The file is delivered through the ByteFLASH portal and is ready to write to the vehicle.