Mercedes-Benz has reached the 1 million mark production milestone for its M-Class built at its plant in Alabama where operations began 12 years ago. The 1 millionth Alabama built M-Class is a palladium silver ML350 BlueTEC diesel destined for a West Coast Mercedes-Benz dealership. Work is under way at the plant on a $290 million expansion of the body shop to accommodate the next-generation versions of the vehicles now built there.