| Code | Power | Torque | Application | |------|-------|--------|--------------| | OM646.981 | 82 kW (110 hp) | 250 Nm | Sprinter 211 CDI | | OM646.963 | 100 kW (134 hp) | 340 Nm | C-Class (W203) | | OM646.961 | 110 kW (148 hp) | 340 Nm | E-Class (W211), C-Class (W204) | | OM646.951 | 125 kW (168 hp) | 400 Nm | C350 CDI (twin turbo - rare) |
Mounted on top of the valve cover to identify cylinder 1 synchronization.
, offer in-depth coverage of common rail fuel systems, electrical equipment, and mechanical design specifically for the OM646 and its variants. Visual Guides
Perhaps the most valuable feature for the professional technician is the strict requirement for Special Tools. The manual does not allow for "make-do" repairs; it lists every required tool by part number: Mercedes Workshop Manual Om646 Engine
A comprehensive factory workshop manual or service guide (often sourced via Mercedes WIS/ASRA software) is divided into systematic sections. Engine Mechanical & Rebuilding
The Ultimate Guide to the Mercedes-Benz OM646 Engine Workshop Manual
Detailed step-by-step procedures can be found in the Mercedes-Benz Workshop Information System (WIS). | Code | Power | Torque | Application
The manual details how to lock the camshafts using alignment pins before breaking the chain.
Always verify these numbers against your specific chassis manual variant, as updates occurred with the EVO engine. Fastener Component Torque Specification →right arrow →right arrow →right arrow Always use new stretch bolts Injector Hold-down Bolt 7 Nm + 90° + 90° Clean threads thoroughly before installing Main Crankshaft Pulley 200 Nm + 90° Requires a flywheel locking tool Camshaft Bearing Caps Follow the specific inside-out sequence Oil Pan Drain Plug Replace copper crush washer How to Effectively Use the Manual for Troubleshooting
Approx. 6.5 to 11.5 Liters (Depending on oil pan/vehicle model) MB 229.31 or MB 229.51 (Low ash for DPF models) 4. Common Repair Procedures Outlined in the Manual Replacing Black Death (Injector Carbon Buildup) The manual does not allow for "make-do" repairs;
For detailed repair and maintenance, you can find specific documentation through these professional and community sources:
To help find the right resources or specific steps for your project, please let me know:
If you are currently working on a specific repair, let me know: What you are working on The specific symptoms or error codes you are encountering Which engine component you need help troubleshooting