How can I troubleshoot the MMI system in my Audi A4?

I'm having trouble with my MMI system in my Audi A4. When I try to access certain features, the screen freezes or goes black. What can I do to fix this?

First, try resetting the system by holding down the power button for 10 seconds. If that doesn't work, try disconnecting the battery for a few minutes and then reconnecting it. If the issue persists, it may be a hardware problem and you may need to take it to a mechanic.

Make sure your software is up to date. Check the Audi website for any updates or contact your dealership for assistance. Also, check all the connections to make sure everything is secure and try replacing any fuses that may be related to the MMI system.