What should I do if my Audi A8's check engine light is on?

I recently noticed that the check engine light on my Audi A8 is illuminated. What could be causing this and how can I fix it?

The check engine light could indicate a number of issues, ranging from a loose gas cap to a more serious engine problem. The best course of action would be to take your car to a trusted mechanic or dealership and have them run a diagnostic test. They will be able to pinpoint the specific issue and recommend the best course of action.