How can I properly maintain the air conditioning system in my Audi?

I've noticed that the air conditioning in my Audi isn't working as well as it used to. What steps can I take to maintain it and keep it running smoothly?

Perform regular checks on the air filter and replace it if necessary. Also, have the refrigerant levels checked to ensure they are at the correct level.

Consider getting an air conditioning service where a professional can clean and inspect the entire system for any issues or potential problems.