Transmission Type by Car: CVT, Automatic or Manual / Mercedes-Benz / CLK-ClassMercedes-Benz CLK-Class Transmission by year YearTransmission20097-speed automatic20087-speed automatic20077-speed automatic20067-speed automatic or 5-speed automatic20055-speed automatic or 7-speed automatic20045-speed automatic20035-speed automatic20025-speed automatic20015-speed automatic20005-speed automatic Source: U.S. EPA / DOE fuel economy data (fueleconomy.gov).