How to Save Money on Audi Battery Replacement Does your Audi key fob experience difficulty locking and unlocking? This could be a sign the battery is in need of replacing. To replace the battery, you must open the key made of metal using a flathead and pop the back cover https://g28carkeys01931.therainblog.com/29154308/what-audi-a4-spare-key-experts-would-like-you-to-know