O.K. have done a search here but have not found this problem (specific) my '05 A6 has a warm air blowing from the passenger side vent and the middle vents are are verging on the warm side drivers side is not bad. Anyone point me in the direction of a fix?

We are seriously thinking of dumping this car as the A/C has not really been up to par the entire time owning it (my 25 year old Full size Bronco) will freeze you out.

Along with the A/C problem, humid air blowing on start up, passenger side headlight control module (adaptive lights) blinking, and in the last month at least once a week you start the car it runs for 20-30 seconds then shuts itself off..... I think it may be time to let it go.