What should I do to fix the Bluetooth connectivity issue in my Audi A4?

I have been experiencing problems connecting my phone to the Bluetooth system in my Audi A4. It keeps disconnecting or the sound quality is poor. How can I resolve this issue?

First, try resetting your Audi's Bluetooth system by turning it off and then on again. If this doesn't work, make sure your phone's Bluetooth is turned on and try to pair it again. You may also need to delete any previous connections on your phone and Audi's system before pairing.