That glass panel above the windshield exists on most cars with a pano roof. They do shatter occasionally, but every one I've heard tell about was caused by the impact of a rock or other road debris. I've never heard of one shattering due to some sort of defect. FWIW, I usually drive around with nothing playing on the infotainment, just enjoying the quietude of the K900
I have not heard any noises from that region.