[SOLVED] Wierd.. Fuel indicator having a rave!

Discussion in 'Engine' started by BillyW124, Sep 27, 2011.

  1. BillyW124

    BillyW124 Hardcore MB Enthusiast

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    ahh, good to be back on here after some time off!

    Ok so comming back from me honeymoon i was itching to get back in the 124 for a spin after 3 weeks of non use.

    Started up a dream no issues no funky clunky sounds just a nice one time crank, the usual little high idle then all calm.

    Drove for a good 30 mins around town when i noticed the fuel gauge decided i must have left her too long and wanted to take the P*ss. While driving the gauge bounces left and right down to the empty and then bounces back up again..

    whats going on here, never had it happen before? :(

    what bit needs replacing then?:bannana:

    must add, noticed it was more frequent this evening whilst driving home. bouncing gauge!
     
    Last edited: Sep 27, 2011
  2. trapperjohn

    trapperjohn MB Club Veteran

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    It's just happy to see you back.

    Let it settle for a bit.
     
  3. OP
    OP
    BillyW124

    BillyW124 Hardcore MB Enthusiast

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    yea thats what i think must be sticky! The sender or whatever makes the reading might be jammed/clogged?
     
  4. trapperjohn

    trapperjohn MB Club Veteran

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    I think the sender is easy enough to get at in your Coupe. Just pull back the trim on the rear wall of your boot. It hooks over little upstands and you will see a massive hex headed nut. Your sender is attached to this I think. You can replace this or do as I do in my Estate, give the dash on top of the fuel gauge needle a thump. That seems to bring it into line for a while.
     
  5. bolide

    bolide Hardcore MB Enthusiast

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    I think this is a gauge fault, not a sensor. I've seen it on quite a few cars now. On one, with an erratic oil pressure gauge, according to the history the sensor had been replaced at least twice

    Unless you want to replace or repair the binnacle I'd ignore it

    Nick Froome
    the independent Mercedes Estate specialists
     
    Last edited: Sep 27, 2011
  6. OP
    OP
    BillyW124

    BillyW124 Hardcore MB Enthusiast

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    Thanks, ill give the dash a little smack if it happens again! it feels as though it may be one of those itermittant things. It was fine this morning.
     
  7. horgantrevor

    horgantrevor Hardcore MB Enthusiast

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    if you taught it was the sender then you can get a additive to add to the petrol tank and it would clean that with a full tank of petrol

    the only other time i had this was due to a bad earth
    but maybe she is just giving out that your married now and shes not happy >>>>
     
  8. OP
    OP
    BillyW124

    BillyW124 Hardcore MB Enthusiast

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    Exactly!

    ...about the sender in the tank then, does anybody know if these need replacing after a certain period of time?

    im sure mines hasn't been changed in 16yrs!
     
  9. horgantrevor

    horgantrevor Hardcore MB Enthusiast

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    they can give trouble i have changed a few in w202's of the same age not a big job once you know how

    a bit more reading needed and i bet some one here has more info on the w124
     
  10. OP
    OP
    BillyW124

    BillyW124 Hardcore MB Enthusiast

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    Fuel sender replaced = no bouncey raving gauge. :thumb:
     
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  11. benzers

    benzers Active Member

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    good stuff! i replaced the sender, nothing happened, i then changed the cluster and ba bamm, works! 30 minute job.
     

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