How do I reset my Audi A4's audio system?

I accidentally changed some settings on my Audi A4's audio system and now it's not working properly. How can I reset it to its default settings?

To reset your Audi A4's audio system, simply hold down the power button for 10 seconds until it restarts. This will reset all audio settings and return them to their default values.

If the above method doesn't work, you can also try disconnecting the car's battery for a few minutes and then reconnecting it. This may help reset the audio system.