For 2009, the Mercedes-Benz crossover vehicle line has been extensively revised. The GL-Class and M-Class both gain availability of a BlueTEC diesel engine. The 2009 Mercedes-Benz R-Class is only an all-wheel drive with the discontinuation of the rear-wheel drive option. A sunroof and the Mercedes-Benz PRE-SAFE safety system are standard on the 2009 model of the crossover wagon. The SL-Class receives some moderate upgrades for 2009 that includes a slight styling makeover and Direct-Steer for tighter cornering. A new Mercedes-Benz SL63 AMG also arrives in the form of the high-end convertible propelled by a 518-horsepower 6.2-liter V-8 engine. Steering wheel paddle shifters and 4Matic all-wheel drive is standard on the Mercedes-Benz CL550 coupe. A more powerful SLK350 is new for the 2009 model year and is accompanied by a range of options introduced to the hardtop roadster. Mercedes-Benz vehicles add an increased array of available advanced safety technology for 2009, The S-Class and CL-Class introduce Parking Guidance System as well a Blind Spot Assist while front pelvic airbags are included on the C–Class models. Mercedes-Benz is saying farewell to their ultra-exotic 206-mile per hour SLR McLaren in 2009 with only the roadster version available.