How do I troubleshoot the MMI display on my Audi A4?

I am experiencing issues with my MMI display on my Audi A4. It seems to be frozen and unresponsive. Can anyone help me troubleshoot this problem?

First, try restarting the MMI system by pressing and holding the MENU button for about 10 seconds. If that doesn't work, check to see if there are any software updates available for your Audi A4 MMI system. If the issue persists, it may be a hardware problem and you should bring your car to a certified Audi technician for further assistance.

I had a similar issue with my MMI display and found that disconnecting and reconnecting the car battery fixed the problem. Give that a try and see if it works for you.