An all-new vehicle in 2006, the 2007 M Class luxury SUV strives to defend the territory staked out by the first generation M Class. It is available in four trims, the ML350 with a 3.5-liter V6 that makes 268 horsepower; the ML500 and its 302 horsepower V8; the ML320 CDI with a diesel that delivers 398 lb.-ft. of torque, and the 503-horsepower ML63 AMG. The ML350 3.5-liter gets 17 mpg city and 21 miles on the highway, while the AMG delivers 12/16. All models come with curtain and torso airbags for front and rear; stability control and a rollover sensor to deploy all airbags in a rollover collision.