Away in France at the moment and the Hartal door lock on our 2010 Autotrail Apache 634 has been playing up.when we push the internal silver button on the door it springs back and won't lock. The door locks and the button goes in when you use the key from outside, or with the key fob and most times with the central locking button on the dash. A few times I have managed to lock it with the button and then it has stopped me opening it with the lever so I have to lean out of the door window and unlock it that way. I know this is a common fault with this mechanism but has anyone got any pictures of what is behind the door panel so I can see what is not going on or diagrams of the mechanism as it seems like something isn’t moving back allowing the button to operate. Also does anyone know where I can get a mechanism if I can’t get it working as all the usual people like O’leary’s aren’t listing it.