This is an original equipment manufacturer (OEM) air conditioning (AC) heater climate control switch for 05-09 Mercedes W209 CLK550 CLK350. It is a genuine part with part numbers A2038304485, A2038303885, and A2038304685. This product features temperature control and operates units for heating and ventilation. It is compatible with several Mercedes-Benz models, including C-Class C Class Mercedes Benz MB OEM Original. This switch replaces the superseded part number Mercedes-Benz / Mercedes Benz / MercedesBenz.