The Mercedes Viano 2.0 CDI 109hp (2003 - 2010) produces 109bhp and 270Nm in standard form. Our Stage 1 ECU tuning file raises output to 180bhp and 400Nm, a gain of 71bhp and 130Nm, with no hardware modifications required. The file is delivered through the ByteFLASH portal and is ready to write to the vehicle.