GerryAZ wrote:if the test car was an SL with black leather interior, they really absorb heat when parked in the sun. The trick is to crack rear windows and switch to outside air intake for a few minutes (A/C fan at fairly high speed and temperature setting reasonable, say 76 F) to exhaust hot air rather than trying to cool it. After exhausting hot air, switch to Auto (which will return it to recirculate) and close rear windows. The light colored interior of the 2011 did not get as hot when parked.
Flushing the hot air out of the car but relying on the A/C to expel all the heat taken up by the interior that has baked in a greenhouse is a fool's errand. That could easily be 15 kWh of heat on top of ambient.
1. Crack windows when parked
2. Park in the shade, or park facing the sun with a good solar shield on the front windshield
It is not difficult to keep the interior at ~ ambient