The Mercedes S 63 AMG S 612hp (W222 - 2017 - 2019) produces 612bhp and 900Nm in standard form. Our Stage 1 ECU tuning file raises output to 690bhp and 950Nm, a gain of 78bhp and 50Nm, with no hardware modifications required. The file is delivered through the ByteFLASH portal and is ready to write to the vehicle.