What causes engine knock in the Audi A5?

I've been noticing a knocking sound coming from my Audi A5's engine recently. What could be causing this and how can I fix it?

There are a few different things that could be causing the engine knock in your Audi A5. It could be due to low quality fuel, dirty spark plugs, or even a worn out timing belt. I would suggest bringing your car to a trusted mechanic to diagnose and fix the issue.

In addition to the potential causes mentioned earlier, the knocking sound could also be a symptom of a more serious issue such as engine bearing damage or a faulty fuel pump. It's important to address this issue as soon as possible to avoid further damage to your car's engine.