How to troubleshoot and fix a malfunctioning MMI system in an Audi A4?

My Audi A4's MMI system keeps freezing and I can't access any of the menus or features. How can I diagnose and fix this issue?

First, try resetting the MMI system by pressing and holding the MENU button for 10 seconds. If that doesn't work, try disconnecting and reconnecting the car's battery. This often resolves minor glitches in the system.

If the problem persists, it could be a software issue. Make sure your MMI system is up to date by checking for any software updates available on the Audi website. If updates are available, follow the instructions to download and install them.

If software updates do not solve the issue, it could be a hardware problem. Take your car to a certified Audi mechanic for further diagnosis and repairs.