Hi Lawrence
Central locking problem ? Welcome to the club...Go to the archives and
see the recent thread on that subject. I removed the passenger door
cent.lock motor (the faulty one), opened it and cleaned it, BUT before,
I tried just cleaning the connectors. and repluged it. That might do it.
Disconnect battery ground when working on it. The faulty motor (there
are one for each door), which was preventing me to lock from outside
from both front doors, which by the way control the 4 doors altogether,
had rust springs inside... I  fixed it but when reinstalled, the lock
keeps unlocking again. So I am exploring options now. Buying a new one
or simply take the one from the rear hatch and put it in the passenger
door. We need the key to open the rear hatch anyway and no doors can be
locked or unlocked from there. So it is my guess that it is an
unnecessary motor...Want to try first ?

Alain Thibault
Westfalia 1991