With almost a half million M-Classes sold in the U.S. and 1.2 million worldwide, Mercedes-Benz is elated to keep SUV buyers happy with a reformed 2012 M-Class model that appropriated the strengths of its forerunner and improved on performance, efficiency, safety and modern technological conveniences. On sale in September, M-B will offer two all-wheel drive models (4MATIC) to the American market: the direct-injection gasoline powered ML350 4MATIC and the clean diesel 2012 ML350 BlueTEC 4MATIC.