W221 won't start when warm

Discussion in 'Engine' started by qaziz, Mar 26, 2014.

  1. qaziz

    qaziz New Member

    Messages:
    1
    Joined:
    Jun 24, 2013
    Car:
    w221 s320cdi
    Hi. I have a S320 CDI lwb, it has started playing up the last few months. I am at a lost at what to do.

    The car starts up find from cold, so in the mornings no problem. But after driving a few miles, if I switch it of, it will not start again. Not even crank. I get a red message appearing on dash saying drive to workshop without changing gear

    Have had it diagnosed by main dealer who says can be a host of items and have suggested changing various units without guarantying a fix.

    I went to an independent specialist who diagnosed it as having a faulty gear select module, he replaced it but this has not fixed the issue.

    Now I have been told that it may be the engine ecu/gateway.

    Has anyone heard of this fault before, all suggestions welcome.
    Thanks
     
  2. panason1c

    panason1c Hardcore MB Enthusiast

    Messages:
    1,141
    Joined:
    Feb 20, 2005
    Location:
    Somerset
    Car:
    ML270cdi, VW Polo 1.9 tdi, BMW K1200rs
    Did any of the specialists read off any codes?

    If so, can you post them?
     
  3. fishmk1

    fishmk1 Hardcore MB Enthusiast

    Messages:
    101
    Joined:
    Aug 19, 2011
    Location:
    Manchester
    Car:
    E55 AMG (W210) '98
    It could be a faulty EIS unit (the bit where you put the key). If it won't crank then it's not disarming the immobiliser for some reason.
     
  4. fishmk1

    fishmk1 Hardcore MB Enthusiast

    Messages:
    101
    Joined:
    Aug 19, 2011
    Location:
    Manchester
    Car:
    E55 AMG (W210) '98
    Have you got a spare key you can try? That would at least rule out a faulty key transponder.
     

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