In car Electrics melt down!

Discussion in 'Electronics' started by cheeky989, Apr 6, 2014.

  1. cheeky989

    cheeky989 New Member

    Messages:
    2
    Joined:
    Apr 5, 2014
    Car:
    C Class
    Hi there,

    I'm a newbie and have a C Class 180 Kompressor 2007. Owned the car from new and has been perfect. I have had for 6 months an electronic problem that Merc can't solve and I'm over a £1000 out of pocket for the trouble.

    I will be driving as normal then the indicator will start flashing double time and says the bulb needs replacing. The stereo and heating shuts down then restarts. The dashboard has the main beam & handbrake lights flashing crazy on & off. If I lock the car then restart it usually goes. In extreme cases (once every 2 weeks) I have to disconnect the battery and it resets all the electronics. This fault is so erratic that I have no idea when its going to happen.

    I have replaced the car battery, replaced the fuse box cover (thought moisture might be getting in) and still no joy. Merc can't work it out and want to strip the whole car to look at the wiring (they also want to charge me hours of labour but still unsure if they will work it out!)

    If anyone has any knowledge of this happening and how people may have cured this fault, I would be hugely thankful.
     
  2. markjay

    markjay MB Club Veteran

    Messages:
    17,009
    Joined:
    Jun 24, 2008
    Location:
    London
    Car:
    W204 C180 Executive SE 2013 Automatic / COMAND NTG4.7 and Morel speakers fitted by www.comand.co.uk
    Sorry to hear about your trouble.

    This sounds like a possible wiring issue, or one of the SAM modules (assuming the malfunctioning consumers can all be traced to the same SAM unit).

    When you say 'Merc'... are you referring to an MB dealer, or an independent garage? And have they tested your car using STAR (MB diagnostic computer)? If so, did they find any fault codes, and can you post them here?
     
  3. OP
    OP
    cheeky989

    cheeky989 New Member

    Messages:
    2
    Joined:
    Apr 5, 2014
    Car:
    C Class
    Hi Mark,

    Thank you for the quick response. My apologies when I say 'Merc'. Yes I am referring to the MB Dealer. I have taken the car to 2 different MB dealers. Posting here is my last step before I start down the road of maybe finding a specialist independent.

    They did test the car on many occasions using STAR. They didn't give me any fault codes but recalled they found many due to the disconnecting of the battery only.

    On my last visit (the final fallout then I took the car back) the fault happened in the car park. The technician took it round and put it straight on the machine. He said all the modules were working correctly. They spent a further 3 hours on it and still couldn't work it out. Basically said they were baffled and the next step was to strip all the cars internal wiring.

    Ive tried everything from not using bluetooth, not opening the boot etc. Its more just hope than any logic to the fault!
     

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