The Mercedes S 450 - 367hp (W222 - 2017 - 2019) produces 367bhp and 500Nm in standard form. Our Stage 1 ECU tuning file raises output to 410bhp and 590Nm, a gain of 43bhp and 90Nm, with no hardware modifications required. The file is delivered through the ByteFLASH portal and is ready to write to the vehicle.