OK - New twist on this.
Last night after a run to the supermarket - my wife turned the key and all of the doors (including the fuel door) and the trunk locked. This morning, I inserted the key and unlocked the doors (engine off) and relocked them. Same problem as mentioned in my first post on this subject.
Does this have anything to do with having the cars' system 'charged'?
1988 300E with a possessed vacuum system..