Check all 3 fuses. The owners manual says to pull (or switch off) fuse 19 (interior fuse panel) a 7.5amp fuse. This apparently controls the I-mid system, blue tooth clock, compass radio controls. Also check interior fuse #25 10amp for the audio system. There is also another fuse in the engine compartment #13 20amp for the premium audio system.
Before I installed the charge line, I pulled the audio fuse #25 (by mistake),it turned the radio off, but the I-mid display still worked, compass, clock and Bluetooth phone audio all worked.
Ken