The all-new rear-wheel-drive STS is powered by either a 255-hp 3.6-liter V6 or a 320-horsepower 4.6-liter Northstar V8, with available all-wheel drive. STS handling benefits from four-wheel independent suspension, available Magnetic Ride Control and available ZF Servotronic II steering gear. The interior features a tight, well-crafted look with Eucalyptus wood trim, Tuscany leather seats, and the dual-firmness design offer a firmer seat cushion and a softer upper seat for a luxurious feel combined with support. Options include keyless access with push-button start, smart remote start, and a Bose Studio Surround Sound Audio system.