In the latest head scratcher, one of the rear doors on my 1993 240 (291k miles)will sometimes not unlock. Central locking (lock actuator) appears to be working as the lock knob moves up and down and I can hear the mechanism in the door operating. The problem occurs intermittently. When the problem occurs, the door cannot be opened from inside or outside the car. The
I have disassembled the door in the past and readjusted the connecting rod for the door handle. I have also lubed all of the internals of the lock/latch mechanism.
Is the problem likely to be a faulty actuator or is there another adjustment I should be aware of? Is the problem somehow associated with the child-proof lock?
Thanks
-AR
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