How to troubleshoot air conditioning issues in the Audi A6?

I recently noticed my Audi A6 is not cooling as well as it used to. How can I identify and fix any air conditioning problems?

First, check if your air filter is clogged with dust or debris. If so, replace it and see if that improves the cooling. If not, you may have a refrigerant leak. Have a professional check and repair any leaks.

Make sure the compressor is working properly by listening for any strange sounds while the AC is running. If you hear any noise, it may be a sign of a failing compressor, which will need to be replaced by a mechanic.