The 2012 Mercedes-Benz R-Class ... For 2012, the R-Class offered two primary trims: the gasoline-powered R350 4MATIC and the diesel-powered R350 BlueTEC. Both models featured all-wheel drive ...

With the 21 gallon fuel tank, the BlueTec has a potential range of over 600 miles between fill-ups. The only complication is Mercedes-Benz’ reliance on urea injection into the exhaust – known ...