w124 central locking problems (estate)

Discussion in 'Electronics' started by John Rodgers, Jun 6, 2011.

  1. John Rodgers

    John Rodgers Member

    Messages:
    45
    Joined:
    May 26, 2003
    Location:
    Northern Ireland
    Car:
    1992 190D 2.5. 1998C250TD and 1993 w124 300d estate
    i wonder if any one can help.central locking on my 124 estate is playing up'useing key it will only lock drivers door but you can see it trying to lock other doors,and when locking from passengers side it will only lock pa ssengers door.Ican hear the pump working,any help would be great thamgs john
     
  2. DITTRICH

    DITTRICH Hardcore MB Enthusiast

    Messages:
    1,598
    Joined:
    Apr 16, 2004
    Location:
    London
    Car:
    W202 C230K + S124 E300D
    The system operates by vacuum. If the only door locking is the one with the key in it then it is the key turning the lock which makes the "snib" go down I believe. The pump is obviously working so you have a leak somewhere in the system and it must be pretty big to stop the system working.

    In my case, the system worked but slowly. Other times the pump would need to spend 40 seconds pumping away before the system would allow central locking to work. The culprit in my case was the diaphram inside the fuel filler cap locking mechanism and I had to replace the whole mechanism. The only way is to locate the leak.
     
  3. Stempies

    Stempies Hardcore MB Enthusiast

    Messages:
    147
    Joined:
    Sep 6, 2010
    Location:
    Surrey
    Car:
    1989 W124 300TE 4Matic
    Yep, either a leak or the door mechanisms need greasing!!
     

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