How to Save Money on Audi Battery Replacement Is your Audi key fob not locking and unlocking it? This could be a sign the battery is in need of replacing. To replace the battery, open the metal key and use a flathead screwdriver to open the back cover. Replace the https://auto-locksmith93780.idblogz.com/30324621/the-full-guide-to-audi-a4-spare-key