Audi Repair: hello, audi c4, ac filter

Question
were is located the ac filter in audi c4 quattro or how to change it.

Answer
You are inconsiderate and dumb.  I have had enough of giving free advice to morons such as yourself.  You are too cheap to buy a manual for your car, expect free and all inclusive service from the internet and when you get an answer you do not like you rate me a 1?  Just out of interest, what is an AC filter?  Please do not EVER contact me again.  Giving your dumb question the satisfaction of an answer is very much like putting pearls before swine.  Goodbye.