Is there any more perfect rival to the Audi RS3 than the Mercedes-AMG CLA 45? The Mercedes-Benz CLA is one of two entry-level sedan models offered in the USA, though Mercedes would prefer you call it a four-door coupe. Though this term is a bit overused at this point, the CLA's rakish roofline is reminiscent of a two-door coupe. Think of the CLA as a baby version of the CLS-Class with smaller proportions and a much lower price point.