Why is my Audi A8 engine making a rattling noise?

I've noticed recently that my Audi A8's engine has been making a strange rattling noise. It seems to happen more when the car is idling or at low speeds. Is this something I need to be concerned about?

It's possible that the noise is coming from your engine's timing belt. This is a crucial component that helps keep your engine running smoothly. It's important to have it checked and possibly replaced if needed, as a failing timing belt can cause serious damage to your engine.

Another possible cause of the rattling noise could be loose heat shields. These are metal plates that protect the underside of your car from the heat of the exhaust system. If they become loose and start vibrating, they can make a rattling noise. Have a mechanic take a look and tighten or replace any loose heat shields.