The Mercedes-Benz ML-class receives a thorough re-working for 2012, with virtually every aspect of the SUV updated and improved. Starting with its chassis, the new ML 350 gets higher tensile steel for better strength and reduced weight, along and more generous noise insulation. The body is now slightly longer, wider and lower. Additional poundage has been trimmed from areas like the axles and suspension components. Despite a more extensive list of standard items, the ML 350 is only 22 pounds heavier than the 2011 model.