Fuel gauge playing up - W208 CLK55 AMG

Discussion in 'Engine' started by MiG, Dec 8, 2008.

  1. MiG

    MiG New Member

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    Does anyone else have a problem with their fuel gauge? When this is filled right up it all sorts of confusion follows - reading full, empty and everything in between for the first half of the tank and then seems to right itself.

    I now estimate how much fuel I need to fill the tank and put it in a little less and the gauge behaves itself...
     
  2. mr. shr

    mr. shr Hardcore MB Enthusiast

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    The fuel gauge on my old W208 wasn't very reliable but then I don't think they are on any Merc.
    On my W202, the needle will move just a couple of mm for the first 100 miles and then down to half a tank for the next 100 miles.

    With both my cars, I always reset the milage each time I fill up, so I know how far I've gone on the current tank. When I hit 300 miles, I know it's time to consider filling up.
     
  3. W210 Fan

    W210 Fan Hardcore MB Enthusiast

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    Thats because some mercs have a wedge shaped tank with the shallow end at the bottom so the top takes ages and the bottom goes quicker,
     
  4. rajinder_1

    rajinder_1 Hardcore MB Enthusiast

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    As for dodgy readings i have found that i never get it from Texaco Fuel, or i use Forte Gas Treatment every so often and fill up which normally clears it up....

    i had it with both the SL and the C Class


    Raj
     
  5. BlackC55

    BlackC55 Authorised Forum Sponsor Authorised Forum Sponsor

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    Use some fuel system cleaner and your problem will be sorted.
     
  6. Scorcher

    Scorcher Hardcore MB Enthusiast

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    My E55 went back to MB for a faulty keyless entry sensor, and while it was in they carries out a recall repair / replacement on the fuel sensor.

    Wonder if it applies to all 55K engines?
     
  7. OP
    OP
    MiG

    MiG New Member

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    Thanks Scorcher. Will check that out after I've tried some fuel cleaner if it doesn't fix it.

    Great wheels BTW - did you adapt those from standard? I have a snow white car and was thinking about getting the wheels done in black.
     
  8. Scorcher

    Scorcher Hardcore MB Enthusiast

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    Nope - they came this way from AMG :)
     
  9. skemball

    skemball Hardcore MB Enthusiast

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    If the fuel level sender unit in the tank uses a conventional rheostat (resistor) type of design it implies that it might be worn/damaged/contaminated at the full-tank end, hence erratic reading. If this is the design it works on the principle of a metal contact arm that wipes across the variable resistor as the fuel level varies.
     
  10. OP
    OP
    MiG

    MiG New Member

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    That would explain it... Got some fuel cleaner in there at the moment. If that doesn't shift the problem, may just leave it as I can avoid the problem by not overfilling the tank (up to the cut off point at the pump). Very strange phenomenon.
     

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