Hello all
I got a 92 100 cs and have the following problem. I have come out of work or gone to my car in the morning to find it unlocked. But then the alarm goes off if you open the door. My theory is that since the locks work off an airpump, I am guessing that air pressure locks the car and releasing the pressure, unlocks it. So, if you lock the car when it is warm, the air in the line cools, looses pressure and unlocks?.

Does anyone else have this problem (yes I searched first)? Does anyone know the fix/?

thanks
e

More likely a malfunction with the central locking vacuum unit.