How do you turn on air conditioner in Audi A6?

I just bought a 1999 Audi A6. I tried turning on the air and it looks like it should be on, but maybe I'm pushing the wrong buttons?? I got the air to come on for a second because I barely felt it coming out but I tried to make it blow harder and I shut it off somehow. I might add it WAS cold, just not a lot was coming out. I am not used to all this luxury in a car! Please help.|||Hit the "+" button a couple times, display should have a snow flake|||hmmm, well i had a 2000 a6 but im guessing it should be similar. There should be a fan symbol, one big and one small. The bigger one is to turn the blower on higher. thats all. if its not the same, sorry!