This definitely rings a bell, not on ID4 but on another VW product. Will try to remember.
They do increase the heat flux into the vehicle, but are much smaller than the window and interior combination. As for warping, I can see the potential for surface coating damage long before the actual material.These black roofs are a triumph of style over function anyway. They should be white to minimise solar gain.
Still, with our powerful AC systems, we don't need to consider such basic things. Where did that drop in the range come from this time?
There was/is cloud cover, so less direct solar radiation.Seems to be fine this morning so guess it’s the heat.
Solar flux matters far more than ambient temp. That being said anything less than 100 C surface temp shouldn’t cause an issue (should actually be higher). At that point the difference in conductive heat rejection rates for 40 vs 30 C air temp is <15%.Listening to the weather forecast today, I wouldn’t leave it out in the open this weekend. Could be 40C! Although, if you want to test it out, take a photo now and one after the predicted excessive heat. Might help with a warranty claim.