All ready to leave the site 0900 Sunday morning. Go to unhook the mains. Try to open the battery compartment door and it just falls open. The locking mechanism inside the door all falls out along with the plastic legs that should be attached to the inside of the door. Came home with the door gaffer taped closed. Have just finished replacing the whole door. Did someone try to force the door on the site? It must have happened at that site as I would have noticed when I hooked up/unhooked the time before. Did the door fail over time - van is 4 years old? Surely I would have noticed? 