96 passat TDI....how do the door locks work...

My driver's side lock will not stay locked.....it pops back up right after locking it.

The key lock switch may be stuck in the unlock position, does the alarm set properly?

the alarm appears to work quite well as it goes off when I open the door without the key.

The mechanical portion of the handle & lock mechanism may be damaged (fairly common). you wil probably need to go into the door & look to see if something is jammed or broken.

That's what I origonally thought but figured I'd ask....thanks