Introduced in 2007, the Mercedes-Benz S550 replaced the previous year's S500, and was part of the German automaker's completely redesigned line of S-Class vehicles. It was available in both rear-wheel-drive and 4MATIC four-wheel-drive versions, and was equipped with a number of cutting-edge technologies, as well as new styling and luxury features.

Design-wise, the S550 featured a new V-shaped grille, distinctive wheel arches, and taut lines that gave the vehicle a more muscular and athletic appearance.

The S550 was equipped with a 5.5-liter, double-overhead-cam, 32-valve V8 engine that produced 382 horsepower, with plenty of low-end torque to ensure fast starts and aggressive driving no matter the location or conditions. As in a number of other 2007 Mercedes models, the shifter for the seven-speed automatic transmission is located on the steering column, leaving the center console free for the communications systems.

In fact, the COMAND system controller, located on the center console, is one of several new features for 2007. A mouse-like device used to access a number of the S550's systems, the controller rotates clockwise and counterclockwise, as well as moves left, right, backward, and forward, enabling the driver to access and control the car's audio system, navigation system, telephone, climate control system, and some seating functions.

Also new are the advanced Bi-Xenon headlights with Active Curve Illumination. They provide enhanced safety by turning to follow the driver's steering wheel movements. In addition, the S550 was equipped with a Night View Assist, a night vision system that uses infrared technology to project an image of the road ahead onto a screen on the instrument panel.

Another new feature is the Distronic Plus adaptive cruise control system, an optional system that will automatically slow the vehicle if it gets too close to a vehicle up ahead, and then return the vehicle to the set speed limit when the way ahead is clear. The Distronic Plus system will even bring the S550 to a complete stop if you reach a congested area.

Inside, such features as 14-way power-adjustable seats with four massage settings, leather upholstery, Burl Walnut trim, and four-zone climate control raise the level of luxury.