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1998 C200 wierd problem with ASR...

Discussion in 'Electrics, Vacuum, Ignition and ECU' started by R84GDS, Dec 2, 2012.

  1. R84GDS

    R84GDS New Member

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    Joined:
    Dec 2, 2012
    Location:
    Elgin
    Your Mercedes:
    CLK230/Elegance
    I have just bought this car and i must say i love it. but its having a bit of a meltdown where the ASR (i think) is concerned...

    When the ASR is switched off the car drives totally fine, but when it is left on its a nightmare. once the car gets over 50ish mph the asr (judderingly) cuts the power to the engine and the warning triangle flashes as though the wheels are spinning.

    with the asr off this does not happen but the car is unbearable to drive at night as the warning triangle is either constanly on or flashing wildly.

    The BAS/ASR light only ever comes on with the ignition but has never come on whilst driving. so as far as the car is concerned there is nothing wrong?

    its a confusing thing to me as i don't know much about the system and reading up on it has confused me even more lol

    does anyone have any ideas on what it could be?
     
  2. Uncle Benz

    Uncle Benz Senior Member

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    Location:
    West Sussex
    Your Mercedes:
    Mainly Mercedes
    What you describe suggests to me that the unit thinks the rear wheel rotation rate is different to the front. Do the tyre sizes match all round? Think you need to get it on a star machine after that to see what is really going on.
     
  3. OP
    R84GDS

    R84GDS New Member

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    Your Mercedes:
    CLK230/Elegance
    The tyre sizes look to be identical all round tbh. But I will have a closer look when I get a chance and let you know
     
  4. OP
    R84GDS

    R84GDS New Member

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    Your Mercedes:
    CLK230/Elegance
    after looking i've found that the tyres are all the same size and make.

    've noticed today whilst driving round town that when the car is in second gear the it judders and cuts the throttle outif you don't accelerate quick quickly. its asthough the car is reacting to the torque on the wheels rather than sensing if the wheels are spinning. but i'm guessing thats not possible.

    also whilst driving the car at motorway speeds with the asr off for any period of time there is a smell of burning when you stop. am i right in thinking that even with the asr switched off there is still a safety feature that applies the brakes?
     

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