Why does my Audi A7 make a strange noise when I turn on my AC?

I've noticed that whenever I turn on my AC, my Audi A7 makes a strange noise that sounds like a grinding or rattling. It doesn't seem to affect the performance of the AC, but it's quite concerning. What could be causing this and what should I do about it?

It's possible that there could be an issue with the AC compressor or one of the AC components. I would recommend taking your car to a trusted mechanic to have it checked out. They will be able to diagnose the problem and give you the best course of action.

Another possibility could be that there is debris or a loose component in the AC system. This could be causing the strange noise when the AC is turned on. I would advise having a mechanic inspect and clean the AC system to see if that resolves the issue.