We're seeing this on our car. The emmc was replaced last spring under warrantee and we got the LTE upgrade in the fall. What I'm seeing is the Central Display Unavailable error message, but after rebooting, the center display and everything else such as AP seem to be working fine. However, the error message is still there.Yes. Sadly that is how they fail. Works, doesn’t work. Works again…. Am stumped how it can partially fail, intermittently.
When they finally replaced mine it appeared to me to be working correctly the past few days but when the SC diagnostic tool was connected they couldn’t read any of my settings. Lost everything but total miles on vehicle.
Are you saying that the MCU itself is failing?