The Mercedes E 63 AMG 558hp (W212 - 2013 - 2016) produces 558bhp and 720Nm in standard form. Our Stage 1 ECU tuning file raises output to 685bhp and 1100Nm, a gain of 127bhp and 380Nm, with no hardware modifications required. The file is delivered through the ByteFLASH portal and is ready to write to the vehicle.