oh okay, they look the same to me

w123 4 speed manual.

I was using ATF, before putting the box in it's place inside the car, i had it on it's side and filled it with ATF ( maybe too much ? ), not sure what type though, i thought there was only 1 type ?

Here's a link to what i used

https://www.castrol.com/en_au/australia/products/cars/automatic-transmission-fluids/atf-dex-iii.html

The grinding synchro issue is only when trying to shift into 2nd gear. 1st, 3rd and 4th are fine.

You cant use DEX III in a old mb tm they use ATF type A. DEX III is too new I guess.

I live in Canada so things may be a little different here. Type F transmission fluid is available here from tractor dealers.

I do not remember seeing it on the shelves of chain stores reciently. Then again I am not buying much automatic transmission fluid. So I just might have missed it.

Also it might be more commonly available in American outlets. It kind of makes sense at the sane time as nothing current that comes to mind takes it I can think of.

math:

The box in the thumbnail which you have posted is an iron case box (716.0xx).
The remainder of the posts from all parties address aluminum case boxes (716.2xx).
If the distinction has escaped anyone,...put down your tools, step away from the car.
The parts do not interchange.

Cheers.

I'll do the fluid change, get the full number off of the box today and see how we go, if no good i'll order a new synchro off of Mercedes.

sorry, it's about 5am here, late night posts. the boxes looked the same haha


edit: So, i can't get a picture of the number on the transmission :'( no matter which way i angle my phone to take a picture i can't seem to get it, between the slave cylinder and drive tunnel, not much room haha

I do have the VIN for the car though