Bosch 0580000025 Original Equipment Secondary Air injection Pump - Compatible with Select Mercedes-Benz C, CL, CLK, CLS, E, G, GL, GLK, ML, R, S, SL, SLK (230, 250, 280, 300, 350, 400, 450, 550);

This is a Bosch engine management program component. Look to Bosch as your engine management authority. Long recognized as an industry leader in ignition and fuel systems, Bosch's quality, innovation, and experience are the foundation of the entire line of engine management components.