Why is my Audi A1 making a rattling noise?

I recently purchased my Audi A1 and have noticed a rattling noise coming from the engine. It only happens when the car is idling and goes away when I rev the engine. What could be causing this and should I be concerned?

The rattling noise could be caused by a number of things, including loose bolts or a worn out timing chain. It's important to have your mechanic take a look at the engine to determine the exact cause of the noise.

I had a similar issue with my Audi A1 and it turned out to be a loose heat shield. It's an easy fix and shouldn't cause any further problems, but I would still recommend having it checked out by a professional.