GXOAP-9199 is an overrunning alternator pulley for catalog-listed MercedesBenz applications. Catalog technical data includes OD1 55, OD2 50, W 40, R 7, ID 17, M M16, CLOCK CW. OEM/cross-reference numbers are listed for Bosch, Cargo, Db, Wai, Zen. Alternator references are listed for Bosch, Db. Review the catalog fitment and reference numbers for compatibility before ordering.