The 2011 Mercedes-Benz CLS-Class is available as a 4-door, 4-seat sedan. Starting at $74,000, the 2011 Mercedes-Benz CLS-Class CLS 550 Coupe is powered by a 5.5L, 8-cylinder engine that returns an EPA estimated 14-mpg in the city and 21-mpg on the highway. The top of the line 2011 Mercedes-Benz CLS-Class CLS 63 AMG Coupe, priced at $99,050, is powered by a 6.2L, 8-cylinder engine that returns an EPA estimated 12-mpg in the city and 18-mpg on the highway.