AC dont blow cold air on 1997 Mercedes-Benz C280

Hello, my a/c dont blow cold air. compressor works, freon is full. what could be wrong? i need advise

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2 answers
There is a little door inside the dash that allows air to go through the A/C evaporator, which cools the air. If this door stops working, air doesn't go through the evaporator and the air doesn't get cooled. There are several possiblities why this can happen, so best to have a Mercedes shop diagnose this to determine why. Here are some near you: http://repairpal.com/directory?address=92870&car_brand_names=Mercedes-Benz
Good Luck!
Make sure the EC botton is off when you want you the air conditioner on . the EC botton is to save gas and serculate the air from out side