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Old 07-12-2003, 07:55 PM
Peter Guenther Peter Guenther is offline
Join Date: Jan 2003
Location: Florida
Posts: 1,084

Basicly the system works like this, when you unlock there is a microswitch that tells the pump to unlock all the doors etc. when you go the other way the pump runs and locks. The remote system provides the same info to the pumpbut also arms the system, so does the lock button inside the car but does not arm or dis arm. The question "is" is it only this door, what happens when you unlock from the other door or trunk, or from the inside. That will narrow it down, some older mercedes had a switch in the vacum diaphram, you turned the key it pulled up on the diaphram and started the pump. the 140 had microswitches in the locks. I would either fault the pump or the switch in the door
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