Why is my Audi A2 engine making a rattling noise?

I recently noticed that my Audi A2 engine has started making a rattling noise while idling. Is this something I should be concerned about? What could be causing this and how can I fix it?

It is possible that the rattling noise is coming from a loose component in the engine. You should have a mechanic inspect the engine to identify the source of the noise and make necessary repairs.

Another potential reason for a rattling noise could be a worn out or damaged engine mount. This is typically an easy fix and should be addressed by a mechanic as soon as possible to prevent further damage to the engine.