The 2011 Mercedes-Benz GL-Class is a full-size luxury SUV available in three trims: GL450, GL550, and the diesel-powered GL350 Bluetec. The GL350 features a 3.0-liter V6 engine producing 210 horsepower, GL450 uses a 4.6-liter V8 producing 335 horsepower, while GL550 comes with a robust 5.5-liter V8 churning out 382 horsepower. All models feature a seven-speed automatic transmission and Mercedes' 4Matic all-wheel-drive system. Key safety features include anti-lock brakes, stability control, and a full suite of airbags including a driver's knee airbag and full-length curtain-type airbags, along with the PRE-SAFE system that can predict an imminent collision. Inside, a COMAND multimedia system with a 7-inch display and a 610-watt Harman Kardon surround-sound audio system provide a luxurious infotainment experience.