The Mercedes-Benz OM646 is a 2.1-liter inline 4-cylinder turbocharged diesel engine widely used in vehicles like the C-Class (W203), E-Class (W211), and Sprinter vans. A comprehensive workshop manual for this engine typically spans over 1,000 pages, covering technical specifications, service procedures, and detailed torque settings. 1. Technical Specifications
The Workshop Manual (often accessed via Mercedes' WIS - Workshop Information System) is typically divided into key groups. For the OM646, the following sections are most frequently referenced: Mercedes Workshop Manual Om646 Engine
Injector & common-rail service
The OM646 was released in several variants, with power and torque outputs tailored to specific vehicle applications: Engine Variant Power Output Torque Output Typical Applications OM646 DE22 LA R 65–90 kW (88–122 PS) 220–270 N⋅m Sprinter (209/309 CDI), Vito OM646 DE22 LA 105–110 kW (143–150 PS) 330–340 N⋅m C 220 CDI, E 220 CDI, CLK 220 CDI OM646 EVO 100–125 kW (136–170 PS) 340–400 N⋅m Later W204 C-Class, W211 E-Class Facelift Standard Maintenance Procedures The Mercedes-Benz OM646 is a 2
P0299: Underboost (check vacuum lines to the turbo actuator). P2047: Injector circuit malfunction. Fuel system and injectors
Official Mercedes-Benz Workshop Manuals: These are the most comprehensive guides used by authorized dealerships. You can find detailed engine manuals (e.g., for W203, W204, and W211 series) on specialized platforms like MBManuals or ShopServiceManual.