It's getting chilly in here.....

[Mark R]

Actually, modern BMWs and upper-end Audis have a similar feature. Probably
MB, as well... but definitely not Porsche. The center vents are
independent... you can adjust their temperature with a dial. I personally
like this feature in our 330xi and the A8s we used to own. Warm and toasty,
but cooler air across the face to keep overall temperature and moisture
down.
 Of course, I thought a heated steering wheel was a STUPID feature in the
1999 A8... until I used it on a chilly morning without gloves. Oh man... was
it nice! Apparently Audi had several fires because of them... it was deleted
on our 2000 A8. I understand they're back with the newer body style,
however.
 Mark Rosenkrantz