How to effectively troubleshoot Bluetooth connectivity issues on the Audi A6?

I've been having trouble connecting my phone to my Audi A6's Bluetooth system. It used to work fine, but recently it's been giving me issues. Every time I try to connect, it says 'Connection failed' or 'Device not found'. I have tried restarting my phone and my car, but the problem remains. How can I resolve this issue?

First, make sure your phone's Bluetooth settings are turned on and set to 'discoverable'. If that doesn't work, try deleting the Audi A6 from your phone's list of paired devices and re-pairing it. You may also need to clear your car's Bluetooth memory by going into the settings menu and performing a factory reset.

If the issue persists, it could be a compatibility problem between your phone and the Audi A6. Check if your phone's software and operating system are up to date. If possible, try connecting with a different phone to see if the problem is with your device or the car's Bluetooth system.