How do I reset my Audi A6 MMI navigation?

I'm having trouble resetting my MMI navigation system on my Audi A6. Can someone provide me with step-by-step instructions?

To reset your MMI navigation, press and hold down the MENU button for about 10 seconds until the screen goes black. Then release the button and wait for the system to reboot. This should solve your problem.

You can also try resetting the MMI by simultaneously pressing the RADIO, NAV, and CAR buttons for about 10 seconds. This should bring up a secret menu where you can select the option to reset the system.

If neither of these methods work, you may need to reset the head unit by disconnecting the car battery for a few minutes and then reconnecting it. Just make sure you have your radio code handy before doing this.