How to troubleshoot a navigation system in Audi A4?

I'm experiencing issues with the navigation system in my Audi A4. It keeps freezing and not responding to my touch. I've tried restarting the system but it doesn't seem to solve the problem. Can someone please guide me on how to troubleshoot this?

Hi John, sorry to hear about your issue with the navigation system in your Audi A4. First, check if the system is updated to the latest software version. If not, try updating it as it may solve the problem. If the issue persists, try resetting the system by holding down the power button for 10 seconds. If that doesn't work, it might be a hardware issue and you may need to take it to an authorized Audi service center.