TUTORIAL: Audi A4 B9, A5, Q5, Q7, TT (2016-2020) Key Fob Battery replacement (removal) in 5 steps - YouTube
Remote control key: Replace key battery - Audi A4 B9, A5, Q5, Q7 TT (CR2032 battery) - YouTube
How to Replace An Audi TT Mk3 Key Fob Battery – Automotive Roar
2018 A4 key issues? I keep getting this message when I try to start my car and also the key fob range for lock/unlock is extremely short. The batteries have been changed,
Key Fob Issue: Key Falls out after Battery Replacement! - AudiWorld Forums