Gearbox leaking?

Discussion in 'Engine' started by mr. shr, Nov 3, 2011.

  1. mr. shr

    mr. shr MB Enthusiast

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    Hi All,
    Did an oil change on my Mum's 211 recently.
    Whilst under there, I noticed that there was a small amount of oil on what I think is the autobox??

    There was also a very small patch on the plastic undertray cover at that same location.

    I'm talking about a few inches back from the engine sump bolt.

    What does this mean? Is this a known thing and something I can sort out or does it need to go to an indy?
     
  2. DSM10000

    DSM10000 MB Enthusiast

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    A very common issue is leaking from the pilot bush. This a rubber / plastic seal through which cables pass in to the gearbox.

    The part is quite cheap (circa£18) and easy to fit but it is important that the fluid level is properly checked. As there is no dipstick for the transmission possibly best to get an Indie with the STAR computer to do it as they can check the levels at the correct temperature.
     
  3. OP
    OP
    mr. shr

    mr. shr MB Enthusiast

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    Thanks for this.
    Yes there were a couple of wire loom type things that were a bit wet so gave it all a wipe down.
    I own a STAR machine (not had it long) but don't know how to do much with it yet. I know how to to a quick test!!! Oh and I managed to change a setting in the IC so that the analouge clock would syn with COMAND (Dealer said wasn't possible).

    So any pointers from you guys would be great.
    Is replacing the part quite involved? Do I need to drain oil out first?
     
  4. DSM10000

    DSM10000 MB Enthusiast

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    My indie charged 30 minutes labour.

    It is quite simple apparently, search on here for a pinned thread on ATF changes by BlackC55 I am sure he mentions it. You will lose a little oil but you do not need to drain the gearbox.
     
  5. OP
    OP
    mr. shr

    mr. shr MB Enthusiast

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    Is it this in the bottom picture?

    Does that part number apply to all cars? I notice it's a 203 part number used on a 210. So it's the right one for 211 also?
     
  6. DSM10000

    DSM10000 MB Enthusiast

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    Yes that is it.

    The part will be gearbox not car specific and the same 5 speed gearbox was fited to the C, CLK, E etc

    When you order it MB will ask for yuor registration and / or VIN number to ensure the correct part is supplied
     
  7. OP
    OP
    mr. shr

    mr. shr MB Enthusiast

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    Finally got round to look at this leak again today.
    Was expecting it to be the pilot bush (even got the replacement part ready) but on close inspection the pilot bushing is bone dry.

    Here is a vid of the section that's leaking. You can see some shinny stuff, that's the leak I'm referring to.

    What do I do now?
    :dk:

    Thanks,
    shr.
     

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