How to troubleshoot low suspension on Audi A6?

I recently noticed that my Audi A6's suspension is lower than usual. How can I troubleshoot this issue on my own?

First, check the air suspension compressor for any leaks or damage. If the compressor is working properly, then move on to the air springs and their connections. It's also a good idea to check the suspension control module for any fault codes.

Make sure to also check the level sensors and make sure they are properly calibrated. If all of these components are in good condition, it's possible that you may need to replace the air suspension strut.