How to fix the MMI system on a Audi A4?

My Audi A4's MMI system has stopped functioning properly. The screen is frozen and none of the buttons are working. How can I fix this issue?

First, try resetting the MMI system by pressing and holding the Menu, Map, and Back buttons simultaneously for 10 seconds. If this doesn't work, check for any loose connections and ensure that your car's battery is fully charged.

Another possible solution is to update the MMI software. You can do this by connecting your car to a stable Wi-Fi network and going to the System and Software Update section in the MMI settings menu.