The Mercedes ML 430 V8 - 272hp (W163 - 1997 - 2005) produces 272bhp and 400Nm in standard form. Our Stage 1 ECU tuning file raises output to 290bhp and 425Nm, a gain of 18bhp and 25Nm, with no hardware modifications required. The file is delivered through the ByteFLASH portal and is ready to write to the vehicle.