For the 2009 Mercedes Benz ML320 with the 3.0L 6-cylinder Engine Code 642.820 F Diesel Turbo, the engine oil capacity is 9 quarts (with filter). The recommended viscosities are 0W-30 or 5W-30. AMSOIL recommends AMSOIL 0W-30 MS 100% Synthetic European Motor Oil (EOTQT-EA) paired with a MANN-FILTERS Oil Filter (HU821X-EA).
What oil does a 2009 Mercedes Benz ML320 take?
Your vehicle requires specific European-formulated synthetic motor oil to protect the OM642 diesel engine. The AMSOIL lookup lists 0W-30 and 5W-30 viscosities for this application. Using a high-quality synthetic designed for European gasoline, diesel, and hybrid vehicles is essential for maintaining emissions system health.
AMSOIL product recommendations
The following AMSOIL products are recommended for your 2009 Mercedes Benz ML320 diesel engine and related systems based on available application data.
| Component | Product Name | Part Code |
|---|---|---|
| Engine Oil | AMSOIL 0W-30 MS 100% Synthetic European Motor Oil | EOTQT-EA |
| Oil Filter | MANN-FILTERS Oil Filter | HU821X-EA |
| Antifreeze/Coolant | AMSOIL Passenger Car & Light Truck Antifreeze & Coolant | ANTPC1G-EA |
| Antifreeze/Coolant | AMSOIL Propylene Glycol Antifreeze and Engine Coolant | ANT1G-EA |
| Automatic Transmission | AMSOIL Signature Series Fuel-Efficient 100% Synthetic ATF | ATLPK-EA |
| Automatic Transmission | AMSOIL OE Fuel-Efficient 100% Synthetic ATF | OTLQT-EA |
| Transfer Case | AMSOIL Signature Series Fuel-Efficient 100% Synthetic ATF | ATLPK-EA |
Engine Oil Specifications
| Property | Details |
|---|---|
| AMSOIL lookup oil grade | SEO55 |
| Viscosity Options | 0W-30, 5W-30 (All TEMPS) |
| Oil Specification | Not confirmed from source data |
Engine Oil Capacity and Torque
| Detail | Specification |
|---|---|
| Capacity (with filter) | 9 quarts |
| Oil Drain Plug Torque | 22 ft/lbs |
Note: On models equipped with an oil cooler, additional oil may be required when the cooler is drained. Always allow 5 minutes after refilling or turning the engine off before checking the oil level.
How much transmission fluid does it take?
The capacity for your automatic transmission depends on whether you have the A89 (Reduced-Friction) code on your datacard. For both configurations, the 7-speed 722.9 transmission has a total fill capacity of 9.5 quarts.
Transmission Fluid Details
| Configuration | Fluid Color | AMSOIL Recommendation |
|---|---|---|
| Without A89 Code | Red | ATLPK-EA / OTLQT-EA |
| With A89 Code | Blue | ATLPK-EA / OTLQT-EA |
Transfer Case Lubricant Specifications
The transfer case requires specific capacities based on the speed configuration of your vehicle.
| Transfer Case Type | Capacity |
|---|---|
| Double Speed | 3.2 pints |
| Single Speed | 1.1 pints |
For these applications, the AMSOIL lookup lists ATLPK-EA and OTLQT-EA.
Coolant Specifications
The cooling system requires 10 quarts of fluid. AMSOIL offers both pre-mixed and concentrated options for this vehicle.
| Product | Formulation | Notes |
|---|---|---|
| ANTPC1G-EA | 50/50 Pre-mix | Ethylene glycol; protects metals, gaskets, and hoses. |
| ANT1G-EA | Concentrated | Requires mixing with distilled or high-quality water. |
Diesel maintenance notes for this vehicle
- Emissions Systems: This vehicle utilizes BlueTEC technology, which may include Selective Catalytic Reduction (SCR) using AdBlue or NOx adsorber systems. Monitoring diesel exhaust fluid levels is critical.
- Fuel Integrity: As a high-pressure common rail diesel engine, maintaining fuel system integrity and using high-quality fuel is vital for preventing component failure.
- Turbocharger Health: The OM642 engine uses a variable nozzle turbocharger; regular maintenance of lubrication systems helps protect this component.
- Oil Level Check: Always allow 5 minutes after refilling or turning the engine off before checking the oil level to ensure an accurate reading.
Common diesel oil-related concerns and how AMSOIL products may help
| Concern | Why it matters | AMSOIL Product | How it may help | Limitation |
|---|---|---|---|---|
| Emissions System Health | Diesel particulate filters and SCR systems are sensitive to oil additives. | EOTQT-EA | Designed for exceptional protection without harming emissions systems. | Does not repair existing damage. |
| Engine Wear | High-pressure diesel components require robust lubrication. | HU821X-EA | Premium media helps reduce engine wear and offers OEM drain intervals. | Requires regular replacement. |
| Extreme Temperatures | Cold starts or heavy towing can stress the engine/transmission. | ATLPK-EA | Remains fluid in sub-zero temperatures and withstands heavy towing. | Diagnosis required for mechanical failure. |
Common maintenance concerns for this vehicle
Owners of the 2009 ML320 should be attentive to several key areas:
- Emissions Hardware: The health of the DPF and SCR components is central to environmental compliance.
- Brake System: Moisture accumulation in brake booster housings can lead to corrosion (refer to NHTSA notes).
- Airbag Systems: Monitoring for potential inflator module issues as noted in manufacturer communications.
Recall, TSB, and manufacturer communication notes
The following information is based on official NHTSA research:
- Frontal Air Bag Recall (Campaign 16V081000): Certain models may have driver-side frontal air bag inflator modules that could rupture upon deployment due to excessive internal pressure.
- Brake Booster Recall (Campaign 22V315000): Moisture may accumulate in the brake booster housing, potentially causing corrosion and reduced brake performance or failure.
Note: Owners should verify all open recalls by contacting a dealer with their specific VIN.
About this vehicle
The 2009 Mercedes-Benz ML320 is a mid-size luxury SUV from the M-Class lineage, which has since transitioned to the GLE nameplate. This model is powered by the OM642 engine, a 3.0L V6 diesel characterized by its 72-degree V configuration and aluminum construction. The OM642 is a significant engine family within Mercedes-Benz history, designed as a replacement for earlier straight-5 and straight-6 diesel configurations.
This vehicle utilizes common rail direct injection and a variable nozzle turbocharger to manage performance. As part of the Mercedes BlueTEC technology line, it incorporates advanced NOx reduction systems. Depending on the specific application, BlueTEC technology typically employs Selective Catalytic Reduction (SCR) using diesel exhaust fluid (AdBlue), or NOx adsorber systems (DeNOx). Owners should be particularly attentive to the health of these emissions components, as they are central to engine efficiency and environmental compliance.
Because this is a high-pressure common rail diesel engine, maintenance focus should remain on fuel system integrity, turbocharger health, and specialized emissions hardware. While general OM642 specifications are well-documented, exact performance figures should be verified against the specific VIN.
Common questions about this vehicle’s diesel oil and maintenance
What is the engine oil capacity for my 2009 ML320?
The capacity is 9 quarts when performing an oil change with a filter. If your model has an oil cooler that was drained, you may need additional oil.
What viscosity should I use for the OM642 engine?
The AMSOIL lookup recommends 0W-30 or 5W-30 viscosities for this vehicle.
How do I know which transmission fluid my Mercedes needs?
You must check your datacard for the A89 (Reduced-Friction) code. Without this code, the fluid is red; with the A89 code, the fluid is blue.
Can I use any antifreeze in my cooling system?
It is recommended to use a formulation like AMSOIL’s OAT (poly-organic acid) which is compatible with other colors and protects all metals, gaskets, and hoses. The lookup lists ANTPC1G-EA.
What is the torque spec for my oil drain plug?
The confirmed torque specification for the oil drain plug is 22 ft/lbs.
How often should I check my BlueTEC components?
Owners should regularly monitor diesel exhaust fluid levels and ensure high-quality fuel usage to prevent component failure in the SCR or DPF systems.
Disclaimer: Always cross-reference all maintenance information with your official owner’s manual or a certified service database to ensure compliance with manufacturer specifications.