I have a 2000 1.8T A4 Quattro and I have finally ran out of Air Conditioning....the blower still works, but only warm air rushes through..........does anybody know what I would need to buy to have A/C for this coming summer? Do I need an A/C condenser, or what is the unit called? How much are they, and where do I find one, other than a dealer? I was on ECS Tuning to look, but I am not sure what I need?