[Update] So I had no idea that the AR camera was actually behind the rear view mirror. I had naturally assumed it was the view from the camera in the front grill. So, because I didn't see any dirt or other obstruction on that camera assembly in the grill I had to assume there was a problem with the sensor behind it. Anyway, fast forward to this morning I went down to my car and because it's raining here in NY I put on the wipers and confirmed that you can see the wipers briefly go through the field of view of the AR camera. Then I realized that the AR view was working perfectly with a nice clear view forward. There must have been some dirt on the top of the windshield which was cleared when the wipers were engaged. So all is well and I (sheepishly) canceled the appointment I had made with the dealership's service department.
Boy, do I ever feel stupid. LOL
Thanks for the the responses which guided me to this "solution.".
