The front left window opens when I operate the central locking via the key (There isn't a remote for the c/l). It's the same if I lock or unlock, and the window moves the instant that the key is turned. It only stops moving if I turn the key back from unlock position or if it reaches the bottom. But it doen't do this every time!
The window will not reclose until it has been fully opened.

The c/l always operates the locks OK, and if I lock the c/l by pressing a door button inside, the window stays shut.
If other windows are open when I lock the car, the full closure operates, but doesn't work on that window.
I can't see any water or physical damage on the convenience control unit under the back seat.

Nubie with a Classic (but annoying) 1991 230e saloon