How to change engine oil and filter on MERCEDES-BENZ M-Class (W164) V6 – replacement guide
MERCEDES-BENZ M-Class (W164) ML 500 4-matic (164.172), MERCEDES-BENZ M-Class (W164) ML 500 4-matic (164.175), MERCEDES-BENZ M-Class (W164) ML 350 4-matic (164.186) … View more
The steps may slightly vary depending on the car design.
This video shows the replacement procedure of a similar car part on another vehicle

- Replace the oil filter every time when changing motor oil.
- Use only new O-rings during installation.
- Wear gloves to prevent contact with hot liquid.
- Please note: all work on the car – MERCEDES-BENZ M-CLASS (W164) V6 – should be done with the engine switched off.
- Step 1
Open the hood.
Step 2Use a fender protection cover to prevent damaging paintwork and plastic parts of the car.
Step 3
Unscrew the oil filler plug.
- Step 4
Lift the car using a jack or place it over an inspection pit.
Replacement: engine oil and filter – MERCEDES-BENZ M-CLASS (W164) V6. Professionals recommend:The vehicle must be on even keel, and if it is at an angle, the drain plug must be at the lowest point.
Step 5
Undo the fasteners of the oil pan lower cover. Use a drive socket #8. Use a ratchet wrench.
- Step 6

Remove the oil pan cover.
- Step 7

Put a waste oil container with at least 9 l capacity under the drainage hole.
- Step 8

Clean the area of the oil pan drainage hole. Use a wire brush. Use all-purpose cleaning spray.
- Step 9

Unscrew the drain plug. Use a combination spanner #13. Use a drive socket #13. Use a ratchet wrench.
- Step 10

Drain the used oil.
Replacement: engine oil and filter – MERCEDES-BENZ M-CLASS (W164) V6. Tip from AUTODOC:Caution! The oil may be hot.Wait until the oil has completely drained from the drainage hole.
- Step 11

Clean the oil filter housing cap.
- Step 12

Unscrew the filter housing cap together with the old filter element. Use the 74/15F socket. Use a ratchet wrench.
- Step 13
Prepare a container for the old oil filter.
Step 14
Put the old oil filter in the container.
Replacement: engine oil and filter – MERCEDES-BENZ M-CLASS (W164) V6. AUTODOC recommends:Move up the container. The oil starts to drain out of the drainage hole immediately after you have removed the oil filter.
- Step 15
Cover the oil filter housing with a microfibre towel to prevent dirt and foreign objects from getting into the system.
Step 16
Detach the oil filter from the filter cover.
- Step 17

Remove old o-rings from the oil filter cover. Use a flat screwdriver.
- Step 18

Clean the oil filter housing cap. Use all-purpose cleaning spray.
- Step 19

Install new O-rings and a new oil filter to their mounting seats on the filter cover.
Please note!Make sure to install the filter correctly. Don't mix up the sides of the part.
- Step 20
Lubricate the rubber seal of the new filter with a little amount of fresh oil.
Step 21Remove the microfibre towel from the oil filter housing.
Step 22
Install a new oil filter housing cover and tighten it. Use the 74/15F socket. Use a torque wrench. Tighten it to 25 Nm torque.
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