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This is covered in a few other threads. But how was he planning on filling it? I forget where the fill hole is if there is one. Sometimes they just fill it through the same drain hole but you have to have the right sized tubing to fill it. As you can see from the approved fluid list, there are very few fluids that meet spec aside from the MB fluids. I believe it's just a small amount so I just buy it from MB.
The PDF konigstiger attaches explains filling procedure.
My first impression on this thread is that when your mechanic has such problems - it is good time to look for different mechanic.
FWIW, the fill adapter you use for the transmission works perfectly for the front diff too. Agreed, make sure he understands the implications of filling it before he drains it.
Did both diffs on the E550... rear was easy and the fluid looked fine at 100k. The front, on the other hand, was looking past due. Drained the front diff into a measurement cup and collected 16 oz. Per WIS, it should hold 18.6 oz and its had a slight leak since the PO (10 yrs, 100k some loss for sure).
I used a transmission filling adapter (same as 722.9), short piece of hose, fluid pump and quart measuring cup. To account for some waste from spillage and oil remaining in the line/pump/cup... I started with 20z and ended up putting in close to 18 oz. Similar technique to this: https://mbworld.org/forums/s-class-w...il-change.html
Used oil out of rear diff
used oil out of front diff
So, moral is... change the front diff oil sooner, maybe 50-75k. I'm curious what it'll look like in our E350.
10-07-2019, 07:00 AM
