Got it fixed. if the key has stopped working in the driver's door lock, you do NOT have to take the door panel off. The linkage btw the keylock and the door lock has become disconnected and can be reconnected easily. Looking at the door from the end, just above the latching mech, there is a rubber p...

if the key has stopped working in the driver's door lock, you do NOT have to take the door panel off. The linkage btw the keylock and the door lock has become disconnected and can be reconnected easily. Looking at the door from the end, just above the latching mech, there is a rubber plug about 3/8&...

I have the same problem on my '97 850. I got the door panel off and can see that the key turns the lock tumbler, but the door remains locked. I think the linkage between the key lock tumbler and the door locking mechanism has come off. See atttached. I cannot find a way into the bottom of the door w...