The 2008 Mercedes-Benz CLS 550 is a four-door coupes that combines a sleek exterior design with a sporty driving experience. it's a specialized breed that straddles the gap between the executive and luxury models within the Mercedes-Benz line. The CLS 550 handles very well. Its standard semi-active air suspension automatically adjusts to eliminate body dive, roll and squat during braking, acceleration or cornering. It also has two Sport settings that tighten things up and deliver a more aggressive driving experience. The 5.5-liter V8 is sourced from the S-Class flagship, and it produces 382 horsepower and 391 pound-feet of torque. It's mated to a seven-speed automatic transmission and accelerates from 0 to 60 miles per hour in just 5.4 seconds. Easily capable of passing and merging on the highway, the engine doesn't taper off in power as it increases speed and offers plenty of instant thrust that makes it easy to put the power down quickly and smoothly. Edmunds says the engine "feels strong and never loses its bite."