The Jeep Liberty retains its 210-hp, 3.7L V6 engine, mated to a 4-speed automatic transmission, a package capable of towing up to 5000 pounds. There are three models, the Sport, Renegade and the Limited, which now includes a Jet model with more chrome, 20-inch wheels as well as a 70th anniversary edition that features a hard-drive-based media center, chrome trim and power seats. All are available in rear-wheel or 4-wheel drive. Two 4-wheel drive systems are also available: the standard, part-time Command-Trac or the available full-time Selec-Trac II. All Liberty models have a raft of safety systems on board like electronic stability control, anti-lock brakes, traction control, brake assist and electronic roll mitigation. Hill descent control and start assist, important off-road features, are included on all Libertys. The Liberty's high ground clearance, these aides will likely get at least a few drivers out of difficult situations. The Sport has a tire pressure monitoring warning system as standard equipment, while the Limited gets a more advanced tire pressure monitor. The Limited has available ParkSense parking assist, too, for days spent in town rather than off-road. The Sport interior uses stain-resistant cloth for the seats. The Renegade includes skid plates, fender flares, tire monitors and serious off-road capability, while the Limited comes with heated leather seats, a 6-way power driver's seat with memory. The Jet edition gets side-curtain air bags and one-touch window lifts. All models have a 60/40 folding rear seat and a folding passenger seat for addition cargo space. All models can be had with the expansive Sky Slider roof, with the largest opening of any sunroof in its class.