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Gear Oil Replacement and Full Maintenance

Model: Mercedes Classe M W164 - Years: 2005, 2006, 2007, 2008, 2009, 2010, 2011
Part: Transmission fluid

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If you experience gear engagement issues in the automatic gearbox, you need to wash and replace the oil in the gearbox. Lift the vehicle on a ramp.

Unscrew the oil plug located on the gearbox sump and let it drain into the appropriate container. Add the washing additive and use the appropriate equipment to perform a thorough complete wash, then let it drain.

After washing, remove the oil sump where you may notice metallic residues on the magnets. Replace the sump with a new one that also contains the filter.

Refill the gearbox with the correct amount of the specified oil. Check the engine oil level and take the vehicle for a road test to ensure the automatic gearbox issues have been resolved.


Updated on 2 February 2026 by ScegliAuto


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