Description
Factory Mercedes E Class E420 CDI Workshop Manual (2006–2009)
This is the official factory-level workshop manual for the Mercedes-Benz E Class E420 CDI (W211 chassis, 2006–2009), covering every service and repair procedure used by authorized Mercedes dealers across the US and worldwide.
Powertrain & Drive Coverage
| Component | Variants Covered |
|---|---|
| Petrol | N/A |
| Diesel | OM629 4.0L V8 turbodiesel (~314 hp / 730 Nm) |
| Transmissions | 7G-TRONIC 7-speed automatic |
| Drive | RWD |
| Model Years | 2006–2009 |
| Badge Twins | N/A |
Common E420 CDI Repairs Covered
| System | Procedures |
|---|---|
| OM629 Turbocharger | Turbo inspection, removal, installation, and boost pressure diagnostics |
| 7G-TRONIC Transmission | Fluid and filter service, valve body removal, conductor plate replacement |
| Fuel Injection System | Common-rail injector testing, high-pressure pump service, leak-off testing |
| Air Suspension (AIRMATIC) | Compressor diagnostics, strut replacement, ride-height sensor calibration |
Format & Delivery
PDF. Instant download; lifetime re-downloads.
Frequently Asked Questions
What is the known weak point of the OM629 engine in the E420 CDI?
The OM629 4.0L V8 turbodiesel is known for issues with the common-rail fuel injectors and high-pressure fuel pump over time. This manual provides complete diagnostic flowcharts, injector leak-off test procedures, and step-by-step high-pressure pump removal and installation instructions to address these concerns properly.
Which chassis code does the E420 CDI use, and what body styles are covered?
The E420 CDI is based on the W211 platform. This manual covers both the W211 sedan and the S211 estate (wagon) body styles, including Elegance and Avantgarde trim levels with all associated equipment differences documented throughout.
Does the manual cover the AIRMATIC air suspension system?
Yes. The W211 E420 CDI was frequently equipped with Mercedes’ AIRMATIC semi-active air suspension. The manual includes full diagnostic procedures for the air compressor, front and rear air struts, ride-height sensor calibration, and ADS (Adaptive Damping System) fault-finding guidance.
What format is the manual?
This manual is a PDF file. After purchase you receive an instant download link, and you may re-download it at any time. The fully searchable document can be viewed on any Windows, Mac, or Linux computer, as well as tablets and smartphones, and individual pages can be printed as needed.
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