C250 TDI Problem Central Locking & Windows


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Jul 7, 2009
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Can anybody help? Central locking occasionally doesn't work, either locking or unlocking. On other occasions it only works when standing close to the drivers door and the front interior courtesy light doesn't come on. To add to the problem, the front windows spasmodically stop working.
If I disconnect the negative battery lead then reconnect, the whole lot resets and everything works perfectly. Invariably when I go back to the car, it starts all over again. I have 2 remote keys and they are both OK. Can anyone suggest a common link that may be creating this aggravation.

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