The Mercedes S 400 Hybrid 333hp (W222 - 2013 - 2017) produces 333bhp and 370Nm in standard form. Our Stage 1 ECU tuning file raises output to 380bhp and 450Nm, a gain of 47bhp and 80Nm, with no hardware modifications required. The file is delivered through the ByteFLASH portal and is ready to write to the vehicle.