Has the radio concern resolved itself, or been repaired since your last post?
Thanks for the link.
So the master reboot in settings did nothing but erase the navigation system way-points and re-set the audio controls. Still couldn't adjust the radio in anyway (volume, channel, audio settings) or turn off the radio. It continued to play at lower volume (out of the center dash speaker) with the car off and doors locked after exiting the vehicle.
Removing the 15 Amp fuse 3 slots up in the 3rd column from the left did the trick. I had entered one way-point as a test and the fuse removal and re-install did not effect the saved favorite nor did it erase my radio pre-sets. Made me wish I had not first tried the master system re-boot. At least the radio pre-sets weren't erased. My guess is the re-set did not work completely due to whatever software glitch is affecting the infotainment system.
Hope it is not going to recur. If anyone else has this issue please post it. Can't imagine what is occurring to cause the radio to 1)freeze completely and 2) continue to play at softer volume through one speaker despite the display (and all other accessories) shutting down and the other speakers not receiving power nor signal. Weird. Anybody care to hypothesize?
Pulled the fuse. Hope it doesn't recur.