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What brand/type transmission oil and differential fluid do you use?
Hey. My 2010 E550 4matic is about to hit 100k miles and I am hoping to do a transmission service as well as replace the fluids on the differentials. I have been doing research, but I keep finding mixed opinions on what type of fluid to use for either one. Any recommendations? Thanks.
I have a 2010 W204 so should use the same fluids as you.
Transmission fluid I went with Shell ATF134. Bought 12q on Amazon.
Transmission filter I bought a Filtran brand that came with an Elring transmission pan gasket. Filtran makes the Genuine Mercedes filters. Or I would have bought the Genuine Mercedes filter.
Differential oil I used Febi 75W-85 which meets the MB spec. 3 quarts was enough to do the front and rear with a little left over.
The transmission pan drain plug gasket is the same one used for the front differential drain plug gasket. 12x16x1.5mm. I already had a few 12x17x1.5mm so used them, fits drain plug the same just 1mm larger outside diameter.
I wrote a thread on servicing my transmission but cant find it. My pan was severely rusted so I replaced it along with the sprags.
Have to make a correction. I only needed 2 quarts of the gear oil to do the front and rear differentials. I bought 3 but only opened 2 of them.
Checked the manual for the 2010 E550 and it says the same capacities that I used.
Also I realize 2010 is the year MB changed transmissions to the A89 version. I confirmed what I had by going under the car and looking at the pan, also checked using my vin for production date. Lastly i do not have the A89 option code.
2011 E350 4Matic with A89,
Fuchs 7134 FE blue fluid 236.15 spec for tranny, FCP Euro and other online suppliers have it
Front diff Liqui Moly 85W-90 GL5 its less than $20 a bottle in Amazon
Rear Diff Valvoline Full Synthetic 75W90 readily available at Walmart or any auto parts store.
Last edited by 01blackhawk; May 7, 2026 at 01:20 AM.
I got the differential gear oil, transmission filter and a few other parts from IDparts. They happen to be a few miles from me and you can pick up your orders at the warehouse.
In case anyones interested I was looking on that IDParts website and they have the Pentosin CHF 11s power steering fluid on sale for a good price.
2yrs ago I bought 1l and swapped out the old fluid. I didnt do a flush but instead every day I sucked out as much as I could from the reservoir then put new fluid in. Figure i'll do it again and should be good for a few more years. The old fluid was really brown.
And, I wanted to double check with you see I know you are more experienced, but this is the information on my cars "release date." So I should use the older ATF, Sheet 236.14 Formula right?
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