The 2009 Cadillac STS is a luxury full-size sedan, comparable to the Mercedes CLS Class, that includes generous power, a wealth of options, and a number of safety features. This model is a carryover from the previous year. With five trim levels, buyers can customize the STS to fit their specific needs. This five-passenger vehicle comes equipped with OnStar as well, a safety program that includes immediate accident alerts, roadside assistance, and even turn-by-turn navigation provided by a live company representative.

The Cadillac STS's base model is fitted with a 302 horsepower 3.6L V6, while the Premium Luxury Performance trim includes an impressive 320 horsepower 4.6L V8. Standard on all trims is a Hydra-Matic six-speed automatic transmission with Driver Shift Control. This feature allows drivers to have the convenience and ease of an automatic with the performance and control of a manual. Nevertheless, potential buyers might be disappointed that only one transmission is available on the STS. With an estimated 17 city MPG and 26 highway MPG, the Cadillac STS is in the middle of the pack. However, those that are looking for exceptional fuel economy in a luxury sedan might want to look elsewhere.

Standard features include 17-inch aluminum wheels, a remote start system, premium Bose sound system, and ultrasonic rear parking assist. The rear parking assist program provides drivers with alerts if an object is blocking their reverse driving path. This can come in handy as the view from the rear window is slightly elevated, making it sometimes difficult to see what is behind the vehicle.

The STS-V is Cadillac's high performance version of the model with a healthy 469 horsepower 4.4L Northstar V8 engine. Performance-tuned suspension and high-performance disc brakes are featured on the STS-V as well. But, buyers can expect a base MSRP of $80,690.

The 2009 Cadillac STS is impressive both in exterior design and interior luxury. The base trim begins at $44,550 for which a mature buyer would appreciate the STS's features, while the younger consumer will be awed by its exceptional power. Families searching for a safe luxury model would do well with the STS base trim, while those in search of exceptional sedan performance will find a match in the STS-V. Also, the kids will love the optional headrest DVD players.