The Mercedes E 55 AMG 354hp (W210 - 1998 - 2002) produces 354bhp and 530Nm in standard form. Our Stage 1 ECU tuning file raises output to 374bhp and 560Nm, a gain of 20bhp and 30Nm, with no hardware modifications required. The file is delivered through the ByteFLASH portal and is ready to write to the vehicle.