I know the central locking system is pneumatic, so if there's no power, that definitely won't work. I don't know how exactly it's connected to the driver's door locking system. I didn't really look at it the last time I had my door apart. I would expect that the lock would still actuate even if there's no power, otherwise there's little point to having the lock cylinder even there.

I've used the lock on the door before, but I always had power. Ron, did you try turning it the other way? Maybe with a little more force? It just seems pointless to have one lock cylinder on the outside and not have it do anything without power.