The 2007 Mercedes-Benz CLK-Class is available as a 2-door, 4-seat coupe. Starting at $54,200, the 2007 Mercedes-Benz CLK-Class CLK 350 Convertible is powered by a 3.5L , 6 -cylinder engine mated to an automatic transmission that returns an EPA estimated 19-mpg in the city and 28-mpg on the highway. The top of the line 2007Mercedes-BenzCLK-ClassCLK 63 AMG Convertible , priced at $ 89,200 , is powered by a 6.2L , 8 - cylinder engine mated to an automatic transmission that returns an EPA estimated 13-mpg in the city and 20-mpg on the highway.