Our A1 has advanced key and for a while has complained that the battery in both key fobs were getting weak.
I tried changing the battery in one fob, but it stopped working the remote. I put the old battery back in and the remote started working again. Checked the new battery and it was fine. Tried again and still did not work. Led is coming on but does not unlock/lock remotely.
Tried again today and tried to use the resync procedure from the manual (press unlock on fob, unlock car with key, press lock or unlock on fob). But does not work.
I then tried another method where you turn on the ignition with another key, and then unlock/lock in the drivers door.
This just had the effect of making both keys not work remotely!
I can still start the car with both keys (ny pressing it to the side of the sterring column), but further resyn procedures for either key did not work.
Any ideas? Or is it over to the dealer?