I have a 1991 300CE W124. I have a few items which I think are related to the Convenience Control Module:

1) My driver's window will not go all the way down with the auto-mode stopping about 10cm from fully open (always the same position). If I hold the switch and it will go all the way down. .until it gets atIt did begin fully opening a few times only to resume not fully opening but now it stops at a different position (but again, now always stopping at this new position). At this stopped position, the auto-mode will not work until the window moves down about 10-15cm and then will resume auto mode or it will fully open if I hold the switch. Passenger door seems to work fine. Note: driver's window motor has been replaced before I acquired the car.

2) I discovered the open and close with the key feature. It worked last night after driving the car at the driver's door and the passenger door. (I didn't try the trunk.) This morning... Nothing at the doors or trunk.

3) The driver and passenger door window do not open slightly when respective the door is opened and close when the door is closed. I am not completely sure that this is supposed to happen, but that is what I have read.

4) The passenger door lock does not seem to arm/disarm the anti-theft. At least, when I lock with the driver's door, and unlock with the passenger door, it sets off the alarm.

Question: Is the interior light supossed to illuminate when the car is unlocked? Mine doesn't but seems like it should.

Any advise on these issues or if they are related is greatly appreciated. Any way to test/recondition the convenience module? From what I have read it may not be completely solid state and my have relays in it.