How to Save Money on Audi Battery Replacement Does your Audi key fob have trouble locking and unlocking? This may be a sign that the battery is in need of replacement. To replace the battery, open the metal key using flathead, then pop the back cover up with the screwdriver. https://g28carkeysolutions26966.articlesblogger.com/52885776/find-out-more-about-audi-a4-spare-key-while-working-from-at-home