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      05-12-2020, 07:42 PM   #3
Marty in NY
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Drives: 21 X5 40i, 18 GTi, Snowblower
Join Date: Nov 2014
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Quote:
Originally Posted by noka View Post
Anyone know what the vents are on each side just behind the rear seat below the rear quarter windows? I was putting a small round parking sticker on the inside of the window and when peeling off the backing, which consisted of two half-circles, I think I might have dropped one half down there. I can't really see in there and don't see any way to gain access. Anyone have an idea.
Don't quote me but believe they are the air escape vents. When you have the windows up, sunroof closed and the fan on, like in the winter with the heater on or the summer with the A/C on, unless you have a place for the air being blown into the cabin to escape so more fresh air can come in, the cabin will become pressurized to a point where no more fresh air will come in because it has no place to go and you'd be sucking your own human CO2.
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