Why is the Audi A7's engine making a rattling noise?

I recently bought an Audi A7 and have noticed a rattling noise coming from the engine. What could be causing this and how can I fix it?

The most likely cause of the rattling noise is a problem with the engine's timing chain. This can be fixed by taking your car to a certified mechanic who can replace the timing chain.

Another possible reason for the rattling noise could be an issue with the oil filter. Make sure to check the oil levels and replace the filter if needed.

If the noise only occurs when the engine is cold, it could be due to a problem with the piston or connecting rod. It's best to have this checked and repaired by a professional to avoid further damage.