Moin, at the beginning of this winter I tried 4 times the heating and found that the car no longer gets as warm as it was last winter. The windshield and the front side windows are still free, but the side windows of the rear doors and in the cargo compartment as well as the rear window remain icy or fogged. Otherwise all the windows were free. I also have the impression that the heating is no longer so well heated. At 7 degrees outside temperature must I set the controls from 22 to 24 or even 25 degrees to keep it warm. The two winters before that didn’t seem like it. Can that be? And what can it be? The SH ran the summer over 2 or 3 times to keep it smooth…. Any ideas? Greetings, Dirk