Why is my Audi A8's engine making a knocking sound?

The engine in my Audi A8 has started making a loud knocking sound while idling. It goes away when I accelerate, but comes back when the car is at a stop. What could be causing this and should I be concerned?

The knocking sound could be indicative of a few different issues. It could be caused by low oil pressure, worn bearings, or even a loose spark plug. It's important to have a mechanic diagnose and fix the issue before it leads to further damage. You should definitely have it checked out as soon as possible to avoid any potential safety risks.

Before jumping to any conclusions, check your oil levels and make sure they are at the proper level. Low oil pressure can sometimes cause a knocking sound. If that doesn't seem to be the issue, it's best to take your Audi A8 to a mechanic for a thorough inspection. While it may not pose an immediate safety concern, a prolonged knocking sound can cause damage to your engine in the long run.