Description
Factory Mercedes R Class R350 CDI 4Matic Workshop Manual (2009–2012)
This is the genuine factory-level service manual for the Mercedes-Benz R350 CDI 4Matic, covering W251 chassis variants produced from 2009 through 2012 — the go-to reference for dealership technicians and serious DIY mechanics across the US.
Powertrain & Drive Coverage
| Component | Variants Covered |
|---|---|
| Petrol | N/A |
| Diesel | OM642 3.0L V6 turbodiesel (R350 CDI) |
| Transmissions | 7G-Tronic 7-speed automatic |
| Drive | 4Matic AWD |
| Model Years | 2009–2012 |
| Badge Twins | N/A |
Common R Class Repairs Covered
| System | Procedures |
|---|---|
| OM642 Diesel Injection | Swirl flap removal and replacement, injector coding, common-rail pressure diagnosis |
| 7G-Tronic Transmission | Fluid and filter service, conductor plate replacement, shift adaptation reset |
| Air Suspension | AIRMATIC strut replacement, compressor diagnosis, ride-height sensor calibration |
| Cooling System | Thermostat replacement, coolant pipe inspection, water pump service on OM642 |
Format & Delivery
PDF. Instant download; lifetime re-downloads.
Frequently Asked Questions
What is the known swirl flap issue on the OM642 engine?
The OM642 3.0L V6 diesel in the R350 CDI is notorious for swirl flap failures — the actuator linkage can break, causing flap debris to enter the intake manifold and potentially damage the engine. This manual covers the full swirl flap removal, inspection, and blanking-off procedure with correct torque values.
Does this manual cover both standard and extended wheelbase W251 variants?
Yes. The W251 platform underpins both the standard and long-wheelbase R-Class configurations sold in the US during 2009–2012. Body dimensions and rear seating procedures differ, and both are addressed within the chassis and interior sections of this manual.
Are wiring diagrams and AIRMATIC suspension diagnostics included?
Full electrical circuit diagrams are included, covering the engine management system, ESP, COMAND, lighting, and body electronics with connector pinouts and wire color codes. The suspension section addresses the AIRMATIC air suspension fitted to R350 CDI 4Matic models, including compressor testing, strut replacement, and ride-height sensor recalibration.
What format is the manual?
This manual is a PDF file delivered via instant download. It is fully searchable, printable, and compatible with Windows, Mac, iOS, and Android devices.
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