Today I have noticed that my central locking key doesn't turn in the actual door lock? It fits in but I can't turn it? So if the battery died I would be stuck out my car ? Anyone know why this could be? It's year 2006... Any help would be gratefully received! I am going to spray the lock inside with wd40 to see if that makes a difference, as since owning the car (over a year) we have only ever used the central locking!