The Grand Cherokee is available in two-wheel and four-wheel drive configuration with four trims levels: Laredo, Limited, Overland, and SRT8 (four-wheel drive only). All trims (except the SRT8) are powered by a 290-hp 3.6-liter V6 paired with a five-speed automatic transmission. The V6 can be upgraded to a 360-hp 5.7-liter V8 Hemi engine matched to a six-speed automatic transmission. The SRT8 trim features an exclusive 465-hp 6.4-liter V8 Hemi engine and a five-speed automatic transmission, with steering wheel mounted paddle shifters. Both V8 engines feature a Multi-Displacement System (MDS), which seamlessly deactivates four of the eight cylinders depending on engine operating conditions. Adaptive cruise control, dual-pane panoramic sunroof, heated and ventilated leather seats, heated steering wheel, power liftgate, rear seat DVD entertainment system, rear parking camera, a multimedia infotainment system with 30-gigabyte hard drive navigation system, and UConnect wireless connectivity are available. The optional (standard on the Overland) QuadraLift air suspension features full time four corner load leveling and improved off-road performance by increasing ground clearance. Standard safety features include front six airbags, electronic stability control, active font head restraints, brake assist, and tire pressure monitoring. For 2012, a new SRT8 trim has been added, featuring a 392 cubic-inch V8 engine, unique front and rear fascias, 20-inch forged aluminum wheels, Brembo brakes, and real carbon fiber interior accents. Also a new six-speed automatic replaces the previous five-speed automatic when paired with the 5.7-litre V8 engine.