Quote:
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Originally Posted by Penguin
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Doesn't matter what that vent is "for," just what it's effect is.
Since the seat must have quite a bit of adjustment forward/backward/up/down, it does makes some sense, as it simplfies the system quite a bit to avoid a direct connection to a/c output... for assembly, operation, reliability, and service.
Imagine what kind of a direct connection would be required to allow seat adjustment. And then if it was a direct connect, you'd also need to add some sort of damper/valve control to shut off the air when you didn't want any, since a direct connection to the Heater/A/C would be pressurized by the HVAC system.
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Again - nothing to add but: 
Maybe just: If you don't use the seat in the very extended seating positions but just in "average" positions (not too high, not too low, not too far backwards/forwards), direct lines would probably hang around loose and produce noises, won't they?
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Since 09/2008:
BMW X5 3.0sd, spacegrey, black leather perforated, bamboo, nearly fully equipped
Car history:
05/2003 - 08/2008: BMW 325Ci fully equipped
1998 - 05/2003: Audi A4 2,8 quattro
1993 - 1998: BMW 318 Touring
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