Been trying to track down and issue with the central locking system. I've had many BMW's, so I know how this system is supposed to work. I now have an 2004 1st gen e60 that I got a couple of months ago I got one key and naturally the remote doesn't work so I am relying on the "OLD SCHOOL" turn the lock with the key procedure. Found that since I got it, mechanical function on the driver door lock does nothing and I have to lock the doors with the button inside and double pull to get out.
All door locks are functioning via inside button and ISTAP triggering as well as the gas door, the gas door can only be triggered with software as, apparently the button just soft locks. There are no faults in the system but alarm does not operate I guess because it can't be dead locked from the door.
I am suspecting the electrical/mechanical function behind the the door lock tumbler might "wanked" somehow but have never ventured in that area.
Any thoughts?