For those who want more muscle, extrovert styling and a tauter suspension, the high-performance CLS55 AMG is definitely worth the extra money. Its 5.5-liter supercharged V8 boasts an output of 469 horsepower and 516 pound-feet of torque. It's mated to a five-speed automatic gearbox. The CLS has probably the most inviting interior yet from Mercedes-Benz. All four seats are covered in leather; gauges are covered by a special mineral glass; fit and finish is impeccable; and burl walnut trim dominates the interior.For 2006, the Mercedes-Benz CLS55 AMG is a brand new model.