Why is the Audi A1's engine making a rattling noise?

I've noticed a strange rattling noise coming from the engine of my Audi A1. It seems to only happen when the car is idling or at low speeds. What could be causing this and should I be concerned?

Hi Samantha, it's likely that the rattling noise is coming from a loose or worn out belt in your engine. It's important to get this checked out by a mechanic as soon as possible, as a loose belt can cause damage to other parts of your engine.

Samantha, another possibility could be that there is an issue with your engine oil. If the oil is low or dirty, it can cause the engine to make strange noises. Have a mechanic check the oil levels and replace if necessary.