I'm sorry one of my first posts is asking for help, but today my central locking has started acting up.
The lock button no long works but both the unlock and boot open buttons do.
When I press the lock button the red LED will flash once, so I assume the button itself is OK.
The central locking button inside the car still works OK too.
I have tried the re-programming technique suggested in another thread here (turn ignition on and off within 5 sec, hold unlock and press lock three times, release and, if successful, doors will lock and unlock) but this did not work.
For info, my car is one of the earliest E46s and I only have the one key - the rubber key (non-diamond) like this:
When searching for answers I came across this thread, which describes similar locking issues. I've also had the starting problem twice since getting the car - both of them around a month ago - but I suspect it was a dead-ish car battery since I haven't had it since.
I plan on getting a new key from the dealer anyway, but hoped I could this one working as well.
Any help or suggestions would be great.