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Thread: OWNER - zewok

  1. #1
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    OWNER - zewok

    Hi all,

    this message to present me and my freshly bought 500E.
    I'm 37 years old and lived in France.
    After several years of looking mercedes young timer (190 16s, 560 SEC, 500 E), i found a model which correspond to what i'm looking for (low km, good shape, reasonable price).
    This model seem to be a very first model while first immatriculation have be done in 03/1991 with 163 000 km.

    Hers some picture to illustrate this post









    The first investigation let appears some elements to fix :
    - oil leak on a flexible pipe
    - there are a wire which go under the gearbox "cluth" which have his isolation completely deteriorated. this wire come from through the bracket on passenger side (bracket between engine mounting and engine) and which go above steering pump. This wire doesn't seem to belong to the lower harness. Are there some other wire degradation identified with the upper and lower harness?
    Here are poor picture of this wire on the passenger side



    And here after his travel under the engine, we can see the copper wire and the isolation which is like cutting in helicoid.



    I will try to make better pictures of that tommorrow
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  3. #2
    Senior Member Rouven036's Avatar
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    Re: OWNER - zewok

    Welcome to the forum, try to make more clear pictures for clarification!
    W123, W124, R129, W163, W201, R230

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    Re: OWNER - zewok

    Welcome. I like the color, nice looking car!
    '94 E500 (744) | '94 E500 (199)         Misc. snapshots

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    Re: OWNER - zewok

    thank you, I'm very proud of this combo of color. This Grey/blue is wonderful under the sun and this associated with the creamy leather is a killer.

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    Re: OWNER - zewok

    Here are better pictures of the wire which is damaged. It take place at the rear of the engine oil sump and travel under the engine in a metallic sheath (maintained by Colson clamping collar).



    the damaged wire



    Here is the wire on passenger side which come through the engine's bracket (in circle)



    and the wire go above the steering pump on driver side.



    Is someone can tell what is this wire?
    It doesn't seem to belong to a wiring harness. Are there other wire/harness concerned by "ecologic" degradation?
    The upper harness look fine, the lower one need to bee replaced but his condition is pretty acceptable for the moment (but I will change it to be sure).

    Thanks
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  11. #6
    Senior Member Rouven036's Avatar
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    Re: OWNER - zewok

    As it seems to me, the wire runs through the rippled plastic pipe, right? This is the knock sensors. The knock sensors are located under the engine mounting brakes and goes from there to the EZL.
    W123, W124, R129, W163, W201, R230

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  13. #7
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    Re: OWNER - zewok

    yes he is in the rippled plastic pipe.
    Is someone as already encounter this problem?
    I imagine that changing this wire will be a drudgery

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    Re: OWNER - zewok

    Quote Originally Posted by Rouven036 View Post
    As it seems to me, the wire runs through the rippled plastic pipe, right? This is the knock sensors. The knock sensors are located under the engine mounting brakes and goes from there to the EZL.
    ^^^ 100% correct. Those wires are for the knock sensors.

    However... if the car is running normally, and there are no codes on the EZL (DI) for the knock sensors, I'd leave them alone. It's a miserable job to replace them as the motor mounts + brackets have to come off both sides.

    Dave M.
    1997 E420 (Bugeyes)
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    1992 500E (Mach 5)
    1987 300D (Sportline Stage 2)
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    Re: OWNER - zewok

    Thank you for this feedback and your position about how to managed this wire.
    I was thinking that only wiring harness was concerned by this damages. Are there some risk that other wire are concerned (difficult to check all the wire under protections)?

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  19. #10
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    Re: OWNER - zewok

    Check the upper and lower harness either by the tag for the manufacturing date or check the condition of the isolation and replace as necessary
    W123, W124, R129, W163, W201, R230

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  21. #11
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    Re: OWNER - zewok

    No manufacturing date tags...
    But upper harness is fine, lower to be changed

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  23. #12
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    Re: OWNER - zewok

    just get my car from the bodywork.
    Some rust to repair. My car is now fully repaired, hollow body waxed. Beautiful work.
    He make me some compliment on the very good conditions of the body (just 2 little rusted localisation), cool.

    Just a question, he give me with the car a little plastic parts (he don't remember where it fit....). The parts number is 1248840022
    I found it on EPC but doesn't see where she goes. If someone has a picture to illustrate that...

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  25. #13
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    Re: OWNER - zewok

    1248840022 is a small cover for the driver side fender liner, allowing access to the ASR pressure reservoir / accumulator. It's located behind the tire. You have to either remove the driver side front tire, and/or jack up the car enough to slide underneath that area, to see where this goes. Don't have a photo, sorry...
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    Re: OWNER - zewok

    ok thank you.
    I'll see that tomorrow. In the same time, i'll change the thermostat.
    Hope that will be a health walk

  27. #15
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    Re: OWNER - zewok

    ok, today, I jack up the car and remove the driver wheel but doesn't see anything
    Maybe it's necessary to remove the plastic protection inside the fender?

  28. #16
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    Re: OWNER - zewok

    Access cover

    P2030018.JPG P2030017.JPG
    " Destination ???, It's the ride that takes you there! "
    1993 500E W124.036 040/271
    1965 220b W111.010 Heckflosse

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  30. #17
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    Re: OWNER - zewok

    great, I haven't looked on the plastic protection.
    GSXR was right (how it can be otherwise....)
    Thank you all

  31. #18
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    Re: OWNER - zewok

    Today, I change the thermostat.
    No particularity, all goes as planned.Before, he varies between 60 and 80°C, not sure it's a good thing for engine wear.
    Now the T° indicator just sat above 80°C (between approximately 85/90 °C).

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  33. #19
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    Re: sensor wiring protection

    Quote Originally Posted by zewok View Post
    ... Are there some risk that other wire are concerned (difficult to check all the wire under protections)?
    The corrugated protection is most likely very brittle, and will easily disintegrate upon contact to your touch. It has spent its lifecycle in a very hostile environment & should be replaced.

    I replaced all of this wiring protection on my car 2 years ago. Thankfully, there were no issues with my sensor wiring insulation.

    Wire_Loom 001.jpg Wire_Loom 002.jpg
    " Destination ???, It's the ride that takes you there! "
    1993 500E W124.036 040/271
    1965 220b W111.010 Heckflosse

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  35. #20
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    Re: OWNER - zewok

    I use exactly the same solution for the knock sensors.
    In place it's great and allow to be sure there are no risk of contact.
    After modification, I went to Mercedes garage for verifying for error message. All is fine, great report.

  36. #21
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    Re: OWNER - zewok

    Quote Originally Posted by zewok View Post
    I use exactly the same solution for the knock sensors.
    In place it's great and allow to be sure there are no risk of contact.
    After modification, I went to Mercedes garage for verifying for error message. All is fine, great report.
    Can someone provide a definitive guide (perhaps another thread or wiki entry) as to which wires and bundles came from the factory with the corrugated plastic covers installed?

    Also which brand/part number and how much plastic is required to properly re-do a 500E?

    This would be super valuable information to have as a reference.

    Cheers,
    Gerry


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  38. #22
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    Re: OWNER - zewok

    Quote Originally Posted by zewok View Post
    I use exactly the same solution for the knock sensors. In place it's great and allow to be sure there are no risk of contact.
    I do the same thing, replace the corrugated loom. The primary item affected is the knock sensor wires. From memory, any generic 1/4" diameter split loom will work; available from Amazon or a local car stereo shoppe. You can get fancy high-temp stuff but I dunno if it's worth the hassle, the split loom is cheap enough and easy to replace again if needed in the future.


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