I purchased a 2005.5 A4 Avant (3.2FSI) today. 2 hours into my 4 hour drive home I noticed a problem with the dual zone climate control. The vents on the driver's side blow only hot (heated) air. The vents on the passenger side regulate from cold to hot as expected. But no adjustment I could invent seemed to matter to the driver side vents. If the fan was on, heated air was coming out of them. Has anyone heard of this before?