This engine rebuild kit includes a head gasket set, timing chain kit, and piston kit designed for 2.1L L4 diesel OM651 engines, including variants OM651.940, OM651.955, OM651.956, and OM651.957.It is compatible with Sprinter 5T and other vehicles equipped with the OM651 engine.The head gasket set corresponds to part numbers 613695000, 6510160500, 6510160420, 68140385AA, and 6510160220.The piston kit includes pistons with a compression height of 48.5 mm, length of 75.5 mm, bolt length of 66 mm, bolt diameter of 30 mm, and recess diameter of 49.4 mm.Compatible piston part numbers include 001PI00166002, 30056503, 130010001821, PM006500, PI004500, 40776600, 41711600, 41712600, 6510300417, 6510300800, 6510300917, 6510301017, 6510301917, 6510302017, A6510300417, A6510300800, A6510300917, A6510301017, A6510301917, A6510303317, 87-433407-10, and 001PI001890.Some components are supplied by Kolbenschmidt.The timing chain kit is identified by HJ-32020.This assembly supports engine rebuild, repair, and maintenance applications and is designed for straightforward installation with consistent performance under standard operating conditions.Compatible vehicle applications include: A-Class (from 06.2012): A180, A200, A220, A220 d; B-Class (from 11.2011): B180, B200, B220 d; C-Class (from 01.2011): sedan, T-Model, Coupe, Convertible models C180, C200, C220, C250, C300 with BlueTEC, d, h, and 4-matic designations; CLA Coupe and Shooting Brake (from 06.2013): CLA200, CLA220 d; CLS and CLS Shooting Brake (from 04.2011): CLS220 d, CLS250 d.