Description
Factory Mercedes S Class S320 CDI Workshop Manual (2006-2009)
This official factory-level service manual covers the W221-chassis Mercedes S320 CDI – giving US technicians and enthusiast owners complete repair and maintenance data for one of Mercedes-Benz’s most sophisticated luxury sedans of the era.
Powertrain & Drive Coverage
| Component | Variants Covered |
|---|---|
| Petrol | N/A |
| Diesel | OM642 3.0L V6 turbodiesel (common rail direct injection, ~235 hp / 540 Nm) |
| Transmissions | 7G-TRONIC 7-speed automatic |
| Drive | RWD |
| Model Years | 2006-2009 |
| Badge Twins | N/A |
Common S Class S320 CDI Repairs Covered
| System | Procedures |
|---|---|
| AIRMATIC Air Suspension | Compressor replacement, air strut diagnostics, ride-height sensor calibration |
| OM642 Swirl Flap / Intake Manifold | Swirl flap actuator removal, intake manifold cleaning, EGR system service |
| 7G-TRONIC Transmission | Fluid and filter change, valve body inspection, mechatronic unit diagnostics |
| Electrical / CAN-Bus | Wiring diagrams, ECU pinout data, multiplexing fault diagnosis, COMAND system troubleshooting |
Format & Delivery
PDF. Instant download; lifetime re-downloads.
Frequently Asked Questions
What chassis and body configurations does this manual cover?
This manual covers the W221 platform S320 CDI produced from 2006 through 2009, including both the standard wheelbase (SWB) and long-wheelbase (LWB) sedan body styles. All S320 CDI variants built on that chassis during the production run are fully documented.
Does the OM642 swirl flap issue get addressed in this manual?
Yes. The OM642 3.0L V6 diesel is known for swirl flap actuator failure, which can result in flaps breaking off and entering the engine. This manual includes complete intake manifold removal procedures, swirl flap inspection steps, and EGR system service to help address this well-documented concern.
Are AIRMATIC suspension procedures included?
Absolutely. The suspension section covers the W221’s AIRMATIC air suspension system in full – compressor diagnosis and replacement, air strut removal and installation, ride-height sensor testing, and electronic control module troubleshooting using factory diagnostic procedures.
What format is the manual?
The manual is a PDF file. After purchase you receive an instant download link, and the file is yours to re-download at any time. It is compatible with Windows and Mac computers, tablets, and smartphones, and individual pages can be printed for shop use.
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