The Mercedes Viano 3.0 CDI V6 204hp (2003 - 2010) produces 204bhp and 440Nm in standard form. Our Stage 1 ECU tuning file raises output to 240bhp and 560Nm, a gain of 36bhp and 120Nm, with no hardware modifications required. The file is delivered through the ByteFLASH portal and is ready to write to the vehicle.