The Mercedes E E 55 AMG 476hp (W211 - 2002 - 2006) produces 476bhp and 700Nm in standard form. Our Stage 1 ECU tuning file raises output to 515bhp and 800Nm, a gain of 39bhp and 100Nm, with no hardware modifications required. The file is delivered through the ByteFLASH portal and is ready to write to the vehicle.