Why does my Audi's engine make a strange noise after driving for a while?

I've noticed that after driving my Audi for about 20 minutes, the engine starts to make a repetitive rattling noise. What could be causing this issue and how can I fix it?

It's possible that your engine is overheating, which can cause components to expand and create that rattling noise. I recommend checking your coolant levels and getting your radiator flushed if needed.

This could also be due to a loose or worn-out belt in your engine. Try tightening or replacing the belt and see if the noise persists.

I had a similar issue with my Audi and it turned out to be a problem with the exhaust system. Get your exhaust checked for any leaks or damage that could be causing the noise.