Hello I jus bought my 2.7t... The air conditioning works ok but for some reason the passenger side blows a lot colder no matter what!(setting both sides at the same temp level)... Also the "Auto" button seems to set the fan speed/temp always exactly the same even if its 65 degrees at night or 96 degrees during daytime...sothere isnt really any "auto" function working here...Any suggestion?

 

Your low on freongonna need to recharge your a/c system.

 

its been like that for over a year... 100% cold on passenger side and around 70% cold on driver side.. although the temperature is set the same on each side...

 

well its been a long time since I posted this and I just got an 02 B6 that has the exact same problem... any suggestions?

 

Set the passenger side temperature 30% warmer than the driver setting. This is a well-known Teutonic ploy to make the passenger cold, assuming she is a woman who will want to snuggle for warmth when you get to the final destination. If it's your buddy, you are SOL.

 

Maybe your heater duovalve is sticking on the left side...low refridge pressure can also make the left side run warmer... or maybe that's the right side.