Mercedes sales are awfully easy, said CEO Dieter Zetsche at the North American International Auto Show in Detroit. Actually, the prompter said “off-the-heezy,” which is supposed to mean something is so cool you leave the phone of the hook, or something. But it fits because Mercedes is appealing to younger buyers of hot cars, and the company's sales are strong. Next up is a very hot S-Class Coupe concept designed and developed for American buyers.