How can I reset my Audi A3's MMI system?

I accidentally changed some settings in my Audi A3's MMI system and now I can't seem to reset it back to default. How can I fix this issue?

The first step is to press and hold the Menu button for about 10 seconds until the MMI system reboots. If this doesn't work, try disconnecting your car's battery for a few minutes and then reconnecting it. This should reset the MMI system back to default.

Another option is to go into the settings menu of the MMI system and look for the option to reset all settings to factory default. This may vary depending on the specific version of the MMI system in your Audi A3.

If these solutions don't work, it may be worth taking your car to a certified Audi technician who can diagnose and fix any underlying issues with the MMI system.