This is funny. On our Honda, the Auto button turns on the AC automatically which bugs me. When its reasonably cool outside, I do not want the AC on - I just want it to give me fresh cool air from the outside. If I turn the AC off, then "Auto" turns off. This is annoying.

BMW gives you the option of whether you want the AC on or not when you are in Auto mode and allowing it to regulate the temperature.

-- Lee