The Mercedes Vito 109 CDI 88hp (W639 - 2003 - 2010) produces 88bhp and 220Nm in standard form. Our Stage 1 ECU tuning file raises output to 145bhp and 330Nm, a gain of 57bhp and 110Nm, with no hardware modifications required. The file is delivered through the ByteFLASH portal and is ready to write to the vehicle.