The CTA Tools Mercedes-Benz AD-Blue Filter Wrench - 46mm, No. 7007, is designed for use with a 3/8" square drive to service the AdBlue/DEF filter housing cap on Mercedes-Benz commercial vehicles equipped with BlueTEC engines. The socket features chrome-vanadium construction for strength and durability. Its applications include Actros, Atego, Axor, and Econic vehicles, as well as the E-Class Sedan (E320 BlueTEC), GL-Class SUV (GL320, GL350 BlueTEC), M-Class SUV (ML320, ML350 BlueTEC), R-Class (R320 BlueTEC), Sprinter Vans (Cargo and Passenger models), GLK-Class (GLK250 BlueTEC), and S-Class Sedan (S350 BlueTEC).