The 2005 Mercedes-Benz CLK-Class is available as a 2-door, 4-seat coupe. Starting at $53,600, the 2005 Mercedes-Benz CLK-Class Convertible is powered by a 3.2L , 6 -cylinder engine mated to an automatic transmission that returns an EPA estimated 20-mpg in the city and 26-mpg on the highway. The top of the line 2005Mercedes-BenzCLK-ClassCoupe , priced at $ 69,900 , is powered by a 5.4L , 8 - cylinder engine mated to an automatic transmission that returns an EPA estimated 16-mpg in the city and 22-mpg on the highway.