This front oxygen sensor is compatible with several Benz models, including C219 CLS 500, W211 E240, E320, E500, and CLS500. It has interchangeable part numbers of A0015400517 and 0015400517. The sensor type is an oxygen sensor, and the package includes superseded part numbers such as FAE 77251, MEAT & DORIA 81539, VEMO V30-76-0015, WALKER PRODUCTS 250-24469, NGK OZA659-EE24, STANDARD LEB425, BOSCH 0 258 006 272, and HOFFER 7481539.