Does your right front vent "buffet" on high fan speed? I love my TL but this is just another minor annoyance that seems to be a design flaw. After replacing the vent and failing to make it go away, the service tech and myself listened to several other new TL's on the lot and the all my this "flapping" noise out of the right vent when the fan was on high.

 

Haven't seen that issue on my TL. I only have 300 miles on it so maybe it will show up later.