While not strictly on-topic, I happen to have the rear parcel shelf and seat out on my car at the moment, so I thought I would take some photos of the vents on the inside of the rear wings on my S5.
There is a weighted rubber flap which appears to be designed to prevent air coming into the cabin while allowing it out.
I have attached photos of the vent from the inside of the rear wing on both sides of the car. The flap is present on one side but not on the other. You can see a horizontal slit of daylight in the photo where the flap is not present. Also included a pic of the flap itself, which had fallen off on the passenger side of my 411.
These vents and the operation (and existence) of the flaps will make a difference regarding exhaust gases entering the cabin.
Last edited by Kevin H; 12-01-21 at 02:00 PM.
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