Why does my Audi A6 make a squealing noise when I turn on the AC?

I recently noticed that my Audi A6 makes a loud squealing noise whenever I turn on the AC. What could be causing this and how can I fix it?

There could be several reasons for your Audi A6 to make a squealing noise when you turn on the AC. One possibility is that the AC belt is worn out or loose. Another possibility is that there is an issue with the AC compressor. It is best to have a professional mechanic inspect your car to determine the exact cause and recommend a solution.