The Mercedes S 300 Hybrid 231hp (W222 - 2013 - 2017) produces 231bhp and 500Nm in standard form. Our Stage 1 ECU tuning file raises output to 260bhp and 600Nm, a gain of 29bhp and 100Nm, with no hardware modifications required. The file is delivered through the ByteFLASH portal and is ready to write to the vehicle.