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C250 AMG Warning Lights / Electrics Fault

Discussion in 'Electrics, Vacuum, Ignition and ECU' started by ffhart, Nov 2, 2015.

  1. ffhart

    ffhart New Member

    Messages:
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    Joined:
    Nov 2, 2015
    Location:
    Cornwall
    Your Mercedes:
    C250 AMG Sport Diesel 2012
    C250 AMG Diesel 2012 has recently started showing:
    Run Flat Indicator - Inoperable
    ABS Warning Light
    ESP Inoperable

    When these lights appear all additional systems become inactive eg no speed limiter, cruise control, eco mode, no stop start, no electronic hold and no auto lights.

    Battery is showing 12.6 in the front and 13.1 in the boot without the engine running. With the engine running front battery shows 14.6

    Car was running perfectly but was standing for a few weeks.

    Would be very grateful for any advice / hints as to how to rectify this.
     
  2. V6Matty

    V6Matty Senior Member

    Messages:
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    Joined:
    Aug 1, 2012
    Location:
    Newark, Notts
    Your Mercedes:
    S212/10/E350(His) W169/2005/A180 (Hers)
    sounds like something isn't getting a speed signal so first guess would be a sensor in the front wheel(s) and now I'm writing this I can't for the life of me remember what it's called. someone else should be along shortly thought that should have a better memory that I do today :)
     
  3. turbopete

    turbopete Senior Member

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    Joined:
    Feb 4, 2009
    Location:
    Spennymoor
    Your Mercedes:
    2010 '60' Ford Mondeo 2.0TDCi Zetec (sorry)
    as Matt. my first checks would be the ABS sensors and check the ABS ring for dirt etc as this can send these things haywire too
     
  4. OP
    ffhart

    ffhart New Member

    Messages:
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    Joined:
    Nov 2, 2015
    Location:
    Cornwall
    Your Mercedes:
    C250 AMG Sport Diesel 2012
    Diagnostics

    Have just managed to get some diagnostics ran and apparently it is the ECU!
    Sounds expensive does anybody have any experience of this.
    Many thanks
     
  5. OP
    ffhart

    ffhart New Member

    Messages:
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    Joined:
    Nov 2, 2015
    Location:
    Cornwall
    Your Mercedes:
    C250 AMG Sport Diesel 2012
    Update

    Make that -
    Electronic Stability Control Unit problem !
     
  6. V6Matty

    V6Matty Senior Member

    Messages:
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    Joined:
    Aug 1, 2012
    Location:
    Newark, Notts
    Your Mercedes:
    S212/10/E350(His) W169/2005/A180 (Hers)
    Ignor the fault it will be affected by a speed signal being incorrect from one of the wheels
     
  7. television

    television Always remembered RIP

    Messages:
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    Joined:
    Mar 14, 2005
    Location:
    Daventry
    Your Mercedes:
    2002 SL500, 216 CL500, all fully loaded
    When the ESP module goes down it can take out the speed signal, hence the other problems as they cannot work without a speed signal. the car is too new to have wheel sensor problems in my eyes.
     
    Last edited: Nov 3, 2015
  8. turbopete

    turbopete Senior Member

    Messages:
    14,204
    Likes Received:
    315
    Joined:
    Feb 4, 2009
    Location:
    Spennymoor
    Your Mercedes:
    2010 '60' Ford Mondeo 2.0TDCi Zetec (sorry)
    it SHOULD be too new to have control module failures too though :rolleyes::rolleyes::rolleyes:
     

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