2009 Mercedes-Benz S-Class (S550, S600)

Mercedes-Benz's S-Class sedans have long been associated with the elite. They can trace their heritage back to Mercedes-Benz's early days of building luxury cars, though the nomenclature starts with the shapely 'Ponton' sedans of the 1950s. It continues through a series of sophisticated sedans - that regularly premiered world-first features - to the 2008 models, which inherit their predecessors' legendary reputation for sophistication and comfort.

The 'base' S550 comes in both rear-wheel and 4Matic all-wheel-drive. Both models feature a 5.5-liter V8 that puts out 382 horsepower and 391 lb-ft. of torque through a seven-speed automatic transmission.

Both models are identical other than the drive wheels and they both include standard 14-way power, leather, heated seats, a harman/kardon audio system with navigation, a power moonroof, Mercedes' COMAND system with control knob, and luxurious wood trim are all standard. On the safety front, the S-Class includes a Pre-Safe crash system that senses an impending collision by tightening seat belts and applying more brake pressure.

The S550s can be upgraded with ventilated front seats, rear obstacle detection, multicontour massaging front seats and heated/ventilated/power adjustable rear seats. In addition, a new AMG Sport Package includes unique exterior trim, chrome exhaust tips and 19' AMG-designed wheels, but it does not modify the suspension.

An active suspension that's driver-adjustable is optional for $3,920.

The S600 adds a turbocharged V12 that pumps out an impressive 510 horsepower and 612 lb-ft. of torque. This engine is so powerful that it requires an even stouter transmission, so Mercedes substitutes a five-speed automatic for the seven-speed that's standard on the S550s.

The S600 also adds all of the S550's available features. Its only option is a 19' wheel package.