I have recently bought an A3 with 2 flip keys one is working fine the other nothing does not work at all will not open/lock doors. Works ok if you manually put it in the lock and turn. I took apart the key gingerly the other day it is unlike the other remote control keys I have had no watch battery to power it. Sounds stupid but how is it powered?, dont want to take things apart without knowing what I am doing!-owners manual missing.
Any pointers welcome