How do I fix a knocking sound in my Audi 80 engine?

I recently purchased a used Audi 80 and I've noticed a knocking sound coming from the engine. What could be causing this and how can I fix it?

The knocking sound could be due to worn out engine bearings. It's important to have a mechanic inspect and replace them if necessary. Maria, I recommend taking your Audi 80 to a certified mechanic for a thorough check-up and repairs. Don't ignore this issue as it could lead to more serious engine problems in the future.