[RRToadHall]

The key is only a back up for the remotes. There are countless threads and even a stickie above on testing door latches, replacing latches and getting your system operating properly. The main thing to remember is that without operating remotes you have to trust your latches. If your primary latch fails your system can think it is being stolen and completely lock you out. At that juncture you will be shipping your BeCM off to a specialist to be unlocked.

Start off testing your drivers latch. Be careful as with age parts like rod retainers can become brittle.

http://www.rangerovers.net/forum/7-range-rover-mark-ii-p38/131722-info-front-door-latch-tests.html