What is the most common cause of air conditioning failure in the Audi A2?

I've noticed that my air conditioning in my Audi A2 is not working as well as it used to. What could be causing this problem and how can I fix it?

The most common cause of air conditioning failure in the Audi A2 is a refrigerant leak. As refrigerant is essential for the system to function, even a small leak can cause a significant decrease in performance.

Another potential cause of air conditioning failure is a faulty compressor. This is the part of the system responsible for pressurizing the refrigerant and keeping the system working properly.

It's also possible that your air conditioning system is simply in need of a recharge. Over time, the refrigerant can leak out of the system, leading to a decrease in performance.