I went back and looked through some pictures I took when rebuilding my transmission and then pulled up the parts catalog. That part 115 is the actual seal ring and not a washer. There is no washer on the back side of the shift lever to shift fork.

A picture I found on the internet:


Attached an image of the back side of my shift lever.

Attached Thumbnails

 

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Old Blue - '83 240D 6 speed manual trans, OM648
Green Machine - 2001 Europa G500
'87 300SDL Bought on Peachparts
'02 E320 4matic wagon

Patchouli Wagon - 2004 E500 - SOLD
333k mile 97 BMW 750il V12. - SOLD
The Californian - 85 300TD - SOLD
Daily Super Sedan - 03 Audi S8 - SOLD
Family Truckster - 2012 VW Touareg TDI - SOLD

It will be helpful for the OP to first identify the transmission that is installed in his car. The one illustrated in the posts above (aluminum case, no side cover, shift arms point down) was first installed in model year 1981. Although it is entirely possible that along with the 616 engine, a trans from a W123 was installed, the original trans has a cast iron case with a separate side cover, and shift arms that point upwards.

Honestly I am pretty sure the bottom of the trans was cast iron.. I was wiping it clean yesterday as it has a minor seepage / drop coming from the two shift linkage bushings. I believe they point upwards.

The bushings/ seals were loose and had some play between the transmission and the shifter arms. Can I simply loosen the bolts on the shifter arms and slide them over?

Also does anyone have a diagram for the correct manual trans shift bracket and mount? this car definitely does not have the correct one installed as it only bolts on one side and hangs. When I bought the car there was no mount installed at all

It drove just fine and I didn't realize it until I got under it a few days later!

Lastly, I noticed that going from 3rd to 2nd is a bit difficult. Not sure if this is normal or if I should maybe consider changing the fluid. I know they take ATF and from what I saw from the wetness/minor leak it is def not ATF in there.