clk on 01 was my introduction to benz . that v6 a great motor and i tink the clk better built than some others of same make. i am 103k miles and two issues maf and regulator blew up after battery change and climate control packed up . dont work well without gas!! no issues since by far best motor, comfort ,reliability, ease of repair, easy to get parts, parts not too expensive and NOT too complex, that i have had since my G.