The Mercedes S 500 (3.0T) 435hp (W223 - 2020 ->) produces 435bhp and 520Nm in standard form. Our Stage 1 ECU tuning file raises output to 480bhp and 600Nm, a gain of 45bhp and 80Nm, with no hardware modifications required. The file is delivered through the ByteFLASH portal and is ready to write to the vehicle.