GXOAP-9127 is an overrunning alternator pulley for catalog-listed MercedesBenz applications. Catalog technical data includes OD1 79, OD2 71, W 39.5, R 8, ID 17, M M16, CLOCK CW. OEM/cross-reference numbers are listed for Bosch, Db, Cargo, Lester, Wai. Alternator references are listed for Bosch, Db. Review the catalog fitment and reference numbers for compatibility before ordering.