unless the cabin air magically cools itself as it passes thru the leather, this is coming from the AC.
The air is very cold, so not sure how the cabin air could feel like this.

regardless of where the air is coming from, it is very cold air...I have never had any issues with it not being cold. I live in Louisiana and it is very hot in the summer. When I get in the car the first thing I turn on is the ventealted seats and the air is cold...and the cabin temp is over 100.

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2013 X5 35i M Sport