The Cadillac STS comes with a 302 hp 3.6-liter V6 engine or a 320 hp 4.6-liter V8. Available with rear- or all-wheel drive it is controlled by a six-speed automatic transmission. Standard equipment includes dual-zone automatic climate control, OnStar telematics, Stabilitrak electronic stability control, and rear park assist. Optional features include automatic headlamp high-beam control, lane departure warning, high-intensity headlights, and adaptive cruise control.For 2008, the Cadillac STS gets a slight internal and external redesign and a more powerful base engine.