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Discuss Trunk leak in w123 300D in the alt.auto.mercedes forum at Car Dealer Forums; Every time it rains I find that the passenger side trunk well liner fills with ...
  1. #1
    gmcop1@aol.com
    Guest

    Default Trunk leak in w123 300D

    Every time it rains I find that the passenger side trunk well liner
    fills with water. Everything else is dry. Is there a sunroof drain or
    rear window seal that could be causing the problem? It's driving me
    nuts!
    Gary C.


  2. #2
    trader4@optonline.net
    Guest

    Default Re: Trunk leak in w123 300D


    gmcop1@aol.com wrote:
    > Every time it rains I find that the passenger side trunk well liner
    > fills with water. Everything else is dry. Is there a sunroof drain or
    > rear window seal that could be causing the problem? It's driving me
    > nuts!
    > Gary C.


    Not familiar with that specific model, but on my 116 300SD water in
    that area was coming from the rubber seal around the tail light
    assembly and from the fuel door. In the case of the fuel door, they
    used a horizontal vacuum driven pin to lock it. There was a small
    grommet around the pin that had worked out. Just putting that back
    fixed that one. Really bad design though, had they located the pin
    sloping the right way, water could not run uphill.

    For the tail light, the best solution would have been a new seal. But
    the stealership wanted $75 for a new one, so I went with some black
    weatherstrip adhesive, which solved it. BTW, there was no evidence of
    water inside the lens. It was getting in behind the assembly, where it
    fastens to the body.

    To find the leaks, two suggestions:

    1 - Get inside the trunk while someone sprays the car with a hose

    2 - Place paper towels in strategic locations inside the trunk prior to
    a rain so you can narrow down the area it's coming from. You want the
    towels to not touch each other, otherwise the water will just wick
    along and they will all be wet.


  3. #3
    Guenter Scholz
    Guest

    Default Re: Trunk leak in w123 300D

    In article <1158642646.001143.20830@i3g2000cwc.googlegroups.c om>,
    gmcop1@aol.com <gmcop1@aol.com> wrote:
    >Every time it rains I find that the passenger side trunk well liner
    >fills with water. Everything else is dry. Is there a sunroof drain or
    >rear window seal that could be causing the problem? It's driving me
    >nuts!
    >Gary C.
    >

    Gary, I've got the same problem on my 190e.... I've come to the conclusion
    that the body is rusting around the window. Prove came this spring when my
    front windshield cracked for no 'apparent' reason... of course it was the
    expanding rust. I'm going to try forcing some silicon rubber into the rubber
    seal.

    cheers, guenter



  4. #4
    Tiger
    Guest

    Default Re: Trunk leak in w123 300D

    Everyone is right... rear windshield leak, taillight seal leak... and there
    is another source of leak... rust in wheel well... feel it with your hand or
    see it with strong flashlight... rear wheelwell toward your trunk well...
    usually rust there.



  5. #5
    Richard Sexton
    Guest

    Default Re: Trunk leak in w123 300D

    In article <1158642646.001143.20830@i3g2000cwc.googlegroups.c om>,
    gmcop1@aol.com <gmcop1@aol.com> wrote:
    >Every time it rains I find that the passenger side trunk well liner
    >fills with water. Everything else is dry. Is there a sunroof drain or
    >rear window seal that could be causing the problem? It's driving me
    >nuts!


    Yeah there are sunroof drains that get clogged and can be reamed out with
    a straightened coathanger. Also, look around the taillights, even removing
    them for a better inspection. That's a major source of leakage.


    --
    Need Mercedes parts? http://parts.mbz.org
    Richard Sexton | Mercedes stuff: http://mbz.org
    1970 280SE, 72 280SE | Home pages: http://rs79.vrx.net
    633CSi 250SE/C 300SD | http://aquaria.net http://killi.net

  6. #6
    Richard Sexton
    Guest

    Default Re: Trunk leak in w123 300D

    In article <eeooge$dej$1@rumours.uwaterloo.ca>,
    Guenter Scholz <scholz@sciborg.uwaterloo.ca> wrote:
    >In article <1158642646.001143.20830@i3g2000cwc.googlegroups.c om>,
    >gmcop1@aol.com <gmcop1@aol.com> wrote:
    >>Every time it rains I find that the passenger side trunk well liner
    >>fills with water. Everything else is dry. Is there a sunroof drain or
    >>rear window seal that could be causing the problem? It's driving me
    >>nuts!
    >>Gary C.
    >>

    > Gary, I've got the same problem on my 190e.... I've come to the conclusion
    >that the body is rusting around the window. Prove came this spring when my
    >front windshield cracked for no 'apparent' reason... of course it was the
    >expanding rust. I'm going to try forcing some silicon rubber into the rubber
    >seal.


    Very true also. There's a thin runny silicone you can get for applying
    between the glas and seal if you aren't going to replace the seal (a big
    deal on the rear window, few people can take the rear window out
    without breaking it and the OE window has wires inside for the defroster,
    aftermoarket (read reasonably priced ones) wont.

    Don't use regular silicone on this, it'll look like fried ass.


    --
    Need Mercedes parts? http://parts.mbz.org
    Richard Sexton | Mercedes stuff: http://mbz.org
    1970 280SE, 72 280SE | Home pages: http://rs79.vrx.net
    633CSi 250SE/C 300SD | http://aquaria.net http://killi.net

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