Herb Chambers 2012 Mercedes-Benz M-Class All-new third-generation version smoother and better. Courtesy New Car Test Drive The 2012 Mercedes-Benz M-Class is all new, with ML350 4MATIC gasoline and ML350 BlueTEC 4MATIC diesel versions available. Mercedes-Benz invented the luxury SUV, with the 1998 ML320. Now comes the third generation, with a new 3.5-liter engine. The ’98 [...]