This is a genuine OEM hydraulic pump actuator for the trunk close assist system of a 2007-2013 Mercedes-Benz S-Class. The part number is A2218001548 and it is interchangeable with A2218000148. It is suitable for S350, S400, S450, S550, S600, S63 and S65 AMG models. The color is OEM and it is designed to fit on the rear of the vehicle. This product has superseded part numbers HB70621002 and HB70621-002. Buy with confidence knowing you are getting an original part from Mercedes-Benz.