Description
Factory Mercedes ML420 CDI 4Matic Workshop Manual (2006-2009)
Engineered for US-market technicians and hands-on owners, this factory-level service manual delivers complete repair and maintenance data for the W164-platform ML420 CDI 4Matic – the range-topping diesel variant of the mid-generation M-Class lineup.
Powertrain & Drive Coverage
| Component | Variants Covered |
|---|---|
| Petrol | N/A |
| Diesel | OM629 4.0L V8 CDI Turbodiesel (~306 hp / 700 Nm) |
| Transmissions | 7G-Tronic 7-speed automatic |
| Drive | 4Matic permanent AWD (LHD & RHD) |
| Model Years | 2006-2009 |
| Badge Twins | N/A |
Common ML420 CDI Repairs Covered
| System | Procedures |
|---|---|
| OM629 Turbocharger | Variable-vane actuator inspection, boost pressure diagnostics, turbo R&R procedures |
| 7G-Tronic Transmission | Fluid and filter service, conductor plate replacement, valve body removal and testing |
| Air Suspension (AIRMATIC) | Compressor replacement, strut seal inspection, ride-height sensor calibration |
| CDI Fuel Injection | High-pressure pump service, injector leak-off testing, glow plug replacement |
Format & Delivery
PDF. Instant download; lifetime re-downloads.
Frequently Asked Questions
What is the known turbocharger issue on the OM629 and is it covered?
The OM629 4.0L V8 CDI in the ML420 is known for variable-geometry turbocharger vane sticking, which can trigger limp mode and reduced power. The manual includes full turbocharger removal, inspection, and actuator testing procedures to address this fault correctly.
What chassis platform does the ML420 CDI share?
The ML420 CDI rides on Mercedes-Benz’s W164 platform, which it shares with the GL-Class (X164) and the R-Class (W251). This manual is specific to the W164 ML-Class body and drivetrain configuration.
Are wiring diagrams and ESP/ABS system details included?
Yes. Electrical coverage spans the CDI engine management system, 4Matic AWD transfer case electronics, ABS, ESP, AIRMATIC suspension control, climate control circuits, and body electronics – complete with color-coded wiring diagrams and connector pin-out locations.
What format is the manual?
This manual is a PDF file, compatible with any device running a standard PDF reader. After purchase you receive an immediate download link, and you can re-download at any time with no expiry.
Reviews
There are no reviews yet.