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      02-26-2020, 10:14 PM   #16
rice_rocket88
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Drives: E60 F48 F39
Join Date: Mar 2019
Location: Boston

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On my old 5 series it literally just turned the fan on. I used it to pre ventilate the hot air in the summer towards the end of the day. The problem is that it drains your battery, so doing it too much if you don't drive the car a lot in between just strains that battery. Interesting feature, but kinda useless to me, more downsides than bonuses.
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