Sunday a.m., before my 20K service today, the radio and associated Command Display panel failed. No audio or nav, nada. That night it started working again. But when I leave the radio or disc on upon engine shutdown, it would not come on again after the engine was started, unless I pressed the radio power button. Maybe a loose wire somewhere?

Probably not related, but the ignition key fob has been hard to remove lately.
The dealer is trouble shooting the car; I'll report the results later in case someone has had similar experience.

 

Wouldn't you know? Service result was: Could not duplicate.

 

If it's not broken for them and there are no codes, it would be a guessing game...