Mercedes-Benz CLS

Mercedes-Benz pioneered the modern four-door-coupe segment with the original CLS nearly a dozen years ago. Even today, the CLS is a slick- and stylish-looking car that offers a small measure of practicality. The CLS550 version gets a 402-hp, 4.7-liter twin-turbo V8 mated to a nine-speed automatic transmission. An AMG version with a 577-hp, 5.5-liter V8 delivers ferocious acceleration. Handling is capable and surprisingly agile for such a large car. The ride is firm but supple and steady. The coupelike styling results in a low roof and small windows, reducing interior space. That limits cabin access, hurts visibility, and compromises rear-seat room. Noise levels are hushed. Fit and finish is excellent, but the controls are complicated. A redesigned CLS will arrive in the fall of 2018.