How to fix the Audi MMI touchscreen not responding issue?

My Audi MMI touchscreen has stopped responding to touch input, making it impossible to use any of the controls or features. How can I fix this issue?

The first thing to try is resetting the MMI system by holding down the Menu, Nav, and Info buttons for 10 seconds. If that doesn't work, you may need to update the software or replace the touchscreen.

Check to see if there are any updates available for your MMI system. Sometimes a software update can fix touchscreen issues.

I had a similar issue and was able to fix it by cleaning the touchscreen with a microfiber cloth. Sometimes dirt or smudges can interfere with the touch sensitivity.