I ran into a blank (upper) screen today after stopping during an errand run. The climate screen was still showing and responsive though. I didn't have time to try to reset procedures, but I did do something that got the top screen to come back.
Try using the voice control to tell the car to dial an incomplete phone number. When I did that it showed the screen control dialog to let me finish the number, and instead I hit the X in the upper right of the dialog. Once I did that the upper screen came back and was normal.
Try using the voice control to tell the car to dial an incomplete phone number. When I did that it showed the screen control dialog to let me finish the number, and instead I hit the X in the upper right of the dialog. Once I did that the upper screen came back and was normal.