The CLS-Class is a mid-sized car with four full side doors and seating for four passengers. The CLS is a stylish and pricey alternative to the conservatively styled E-Class sedan upon which it is based. Mercedes refers to the CLS as a coupe due to its four passenger seating and sleek styling. The model range includes the V8 powered CLS550 and the high-performance CLS63 AMG model. Both models include seven-speed automatic transmissions and rear-wheel-drive, although the CLS550 is offered with an optional all-wheel-drive setup (CLS550 4MATIC). Recent Mercedes-Benz models have touted high output engines and the latest engines in the CLS are no exception. The standard 4.7l V8 (CLS550) is rated at 402-bhp and the optional 5.5l V8 (CLS63 AMG) produces an impressive 518-bhp. There is a long list of standard and optional features befitting a luxury car. With a base price exceeding $71,000, the CLS is aimed a well-heeled niche.