This connecting rod and piston kit set is compatible with the GLC X253 equipped with the 2.1L or 2.2L inline-4 diesel engine, OM651.It is designed as a direct replacement for the connecting rod and piston assembly.The set supports engine codes OM651.921, OM651.924, OM651.925, OM651.930, OM651.940, OM651.950, OM651.955, OM651.956, OM651.957, OM651.960, OM651.961, and OM651.980.It fits models including A-Class, B-Class, C-Class, CLA, CLS, E-Class, SLK, and SLC.Reference numbers include A6510302501, A6510302401, A6510300701, 6510330101, 6510330102, 6510330401, 6510330402, 6510330701, 6510331002, 6510331102, 6510331201, 6510331602, 6510331702, and OM651.Interchange numbers include Kolbenschmidt 77972600, 77972610, 77972620, 77973600, 77973610, 77973620, 77973700, 77973710, 77973720; Wilmink Group WG1321158, WG1343437, WG1379177, WG1321159, WG1343438, WG1345947, WG1724702, WG1724703, WG1724704; ET Engineteam LP004400, LP004425, LP004450, LH004100, LH004125, LH004150; FAI AutoParts BB2053-025, BB2053-050, BB2053-STD, BM1055-025, BM1055-050, BM1055-STD; and Glyco 71-4724 STD.