Hi all, first post here with a question? I have an 11 plate Expert with a small lock problem. All doors lock with the key fob/button, when I open them all doors open except the rear doors. I have to open it with the key. When i activate the locks I can hear the mech in the rear door operating. Has anyone come across this before or have any adcice on how to fix it. ? Thanks in advance for your help.