Why is my Audi engine making a loud rattling noise?

I recently noticed that my Audi's engine is making a loud rattling noise. What could be causing this and how can I fix it?

The rattling noise could be due to a loose belt or a malfunctioning pulley. It is important to get this checked by a mechanic as soon as possible to avoid further damage to your engine.

Another common cause of engine rattles in Audis is low oil level. Check your oil level and top up if necessary. If the noise persists, it is best to take it to a professional for further diagnosis.