I received some very helpful info from TripleX5 (as always, he's right on top of things!). Unfortunately, his suggestions also failed to get the phone charging.

So, I dropped it off at the dealer this morning, and within an hour received a call that they would need to replace the eject box. It wasn't passing power through it. Of course, the part will have to be ordered.

The good news is that they are going to let me keep their loaner overnight, and save me from a second visit. Think I'll go see if the X3 loaner I'm driving can handle a 60% grade with HDC turned off. Only kidding.

Thanks to all for your assistance.