How do I troubleshoot low air flow in my Audi A6?

I've noticed that the air flow in my Audi A6 has suddenly decreased. Are there any specific areas I should check for issues, or any common causes for this problem?

One possible cause for low air flow in your Audi A6 could be a clogged cabin air filter. This filter helps keep the air inside your car clean, but can become dirty and blocked over time. You can try replacing the filter to see if that solves the issue.