Before choosing fluid note that engine code M272.979 and volume of 3.5 were installed to your car in 2008. Only Green antifreeze type is suitable and you’ll need 8.1 liters of it. There are some conditions in servicing cooling module at Mercedes-Benz Viano. It’s important to provide cooling for Mercedes-Benz’s engine with 3.5 liters volume. For 2012 Viano engine it’s necessary to get normal temperature balance.
Better buy 8.1 liters of good antifreeze in Green color. Every Mercedes-Benz owner should remember that engines with code OM642.990 are quite demanding. So better use Mercedes-Benz’s advice for servicing 2011 Viano. Use your 2.1 engine longer in 2011 Viano by keeping these rules.