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W169 Rear wiper motor removal

Discussion in 'Bodywork, Tyres, Wheels & Trim' started by mojomo, Jun 7, 2018.

  1. mojomo

    mojomo New Member

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    Your Mercedes:
    2008 W169 A150 Classis SE
    Hi, I need to remove and replace the rear wiper motor. This is because the thread on which the nut is on has completely broken off and I cannot secure the rear wiper arm. I noticed there is a small plastic trim on the rear door and wondered if it is possible to replace the motor just by removing that instead of the whole trim on the boot.

    If anyone has removed the rear wiper motor any helps or tips will be much appreciated.
     
  2. anyweb

    anyweb Senior Member

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    Location:
    Sweden
    Your Mercedes:
    w212,w120 (petrol),w120 (diesel)
    are you sure it's broken, i had a loose wiper arm and simply bought a replacement, then removed the previous alu 'nut' which had merged itself with the wiper motor bolt or whatever it's called, once it was off I could fit the new wiper arm

    getting it off was tricky it was molded into place after all the years, in the end i cracked it in half with an adjustable wrench, it was aluminum so broke easily whereas the threaded bolt underneath is steel

    do you have a photo of your problem area ?
     
  3. OP
    mojomo

    mojomo New Member

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    Your Mercedes:
    2008 W169 A150 Classis SE
  4. GLK

    GLK Senior Member

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    Location:
    Northampton
    Your Mercedes:
    A200 Avantgarde Special Edition Sports Coupé • C169
    There's no need to replace the motor - the fixing nut, incorporated into the rear wiper arm is seized - it's a known problem on W169 - I had exactly the same one, when I bought my car three years ago. Well, it was actually working okay, but wasn't stopping in horizontal position, and that's a big thing for me o_O

    Not surprisingly, Mercedes quoted for motor replacement ...

    I looked into this, and decided to DIY remedy it - removed the plastic part of the arm, and carefully split the seized nut, to remove it. Cleaned the shaft, fitted a brand new wiper arm. Total cost - £15 or something like that.

    So, all you need is to remove the old wiper arm (including seized nut - it's inside the plastic), buy a new arm from Mercedes, and fit it.

    That's it.

    Here's a bunch of pics, to make it clear hopefully:

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    Last edited: Jun 11, 2018
  5. GLK

    GLK Senior Member

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    Your Mercedes:
    A200 Avantgarde Special Edition Sports Coupé • C169
    I just looked at your pictures, and see the damaged thread - I guess the problem was left for too long ...

    You would need a new nozzle shaft - part number A1698601647, as well as a new wiper arm - A1698200644
     
  6. anyweb

    anyweb Senior Member

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    Your Mercedes:
    w212,w120 (petrol),w120 (diesel)
    I would take the nut off first, then use an adjustable wrench or large pliars to remove the alu circular bit that was inside the middle of the wiper arm, then clean up the entire wiper shaft with a wire brush to see what damage if any there really is, thats what i did and it worked perfectly and I was able to install the new wiper with ease
     

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