The 2006 Cadillac STS is from the first generation, produced between 2005 and 2012. This luxury sedan was available with two engine options: a 3.6L V6 that makes 255 horsepower and a 4.6L Northstar V8 that produces 320 horsepower. The V6-powered STS comes with a five-speed automatic transmission and is available in either RWD or AWD configuration, while the STS V8 is equipped with a six-speed automatic and has RWD as standard with optional AWD. Inside, the STS is equipped with a Bose sound system and a touchscreen infotainment system, and offers comfort and convenience features such as heated and ventilated front seats, and OnStar. Standard safety features include front side airbags, curtain-type head protection airbags, and antilock brakes. This model is known for its roomy, attractive, and comfortable interior, balanced and secure handling, strong acceleration, and high-speed stability.