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E240 1999 - Sudden ignition problem

Discussion in 'Electrics, Vacuum, Ignition and ECU' started by Combat, Oct 21, 2012.

  1. Combat

    Combat Member

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    Your Mercedes:
    E240/1999/W210
    Hello,

    I have an automatic E240 1999. It has worked brilliant until now.

    This morning I was going to the mall shopping but unfortunately I had to turn back already at the parking lot.

    I put the key in and turned it but there was only the starter running for about 5-6 seconds. Tried it a few times but no result. Right before the starter runs I can here a couple of sounds that I refer to the fuel pump.

    I´ve read posts about intermittent starting problems while stopping the car for 10-15 minutes and that it works after another hour or so but this was in the morning with the car parked yesterday afternoon. I've also looked at the two 10 ampere fuses referred in this thread and they look ok.
    http://forums.mercedesclub.org.uk/showthread.php?t=55227

    Any ideas what it might be? Would be grateful for quick answer. Having a baby soon and would not be happy to be out of wheels when the day comes.:eek:

    Best regards,
    Tommy
     
  2. television

    television Always remembered RIP

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    2002 SL500, 216 CL500, all fully loaded
    Hej Tommy I would say the crankshaft sensor for your fault
     
  3. OP
    Combat

    Combat Member

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    Thanks for quick answer.

    Ok, doesn't sound good. Is that an intermittent problem? Think I've had a friend with similar problem at his SAAB and that it could start eventually. Any ideas what I can do myself or shall I just bring it to the workshop?

    ::Tommy
     
  4. television

    television Always remembered RIP

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    It sits over the starter motor just held in with one screw, the way they normally fail is always fine from cold, the will not start till its cooled down, and sometimes stop when driving,,, they cost about 850kr and cheapest from any good Bosch agent, there are some in Stockholm

    Its number 5 here hard to get to

    [​IMG]
     
  5. OP
    Combat

    Combat Member

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    Ok..lot of information. Thanks.

    So its this sensor even though it's 5°C now and the car was last running yesterday? Just for me to understand. Commonly it works well during cold but it can also be failing when it is cold and hasnt been running for 20 hrs?

    Is there any other possibilities? fuel filter, Pump, other...
     
  6. alexanderfoti

    alexanderfoti MBO Forum Supporter Authorised Forum Supporter

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    I would also say 99% crankshaft position sensor. Classic symptom you described, as when you turn the engine off, all fans stop and heat soak causes an intermittent sensor to heat up and fail. When it cools down it works again.

    I would change it first.
     
  7. OP
    Combat

    Combat Member

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    Alex,

    I've never had the problem when the car was warm. This problem first occured yesterday morning when the car already was cold. I stoped it at the afternoon the day before that. Right now I consider it a permanent issue since it havent started at all yesterday.

    Do you still think it is that sensor?

    ::Tommy
     
  8. television

    television Always remembered RIP

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    Measure it with an ohm meter and it between 800Ω and 1kΩ
     

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