Mercedes-Benz redesigned their M-Class for 2007 M-Class, making it 5.9 inches longer and 2.8 inches wider than the 2006 model. It continues to employ a unibody chassis, and still retains the large three-pointed star in the grille and the reverse sloped C pillar from the previous generation. larger wheel flares, a more steeply raked windshield, and a more defined shoulder line are some of the visual changes from the previous body style.New for the 2007 model year are a 3.0L turbo-diesel V6 engine and an AMG-tuned 6.3L V8. Standard in all models is the new smooth-shifting 7-speed automatic. Adding two more gears improves both acceleration and fuel economy.Standard in all models is the new smooth-shifting 7-speed automatic. Adding two more gears improves both acceleration and fuel economy.The interior of the new M-Class is exceptional, with improved materials, fit, and finish.