Why does my Audi A5 engine make a knocking noise when accelerating?

I've noticed that my Audi A5's engine makes a loud knocking noise when I accelerate, but it seems to go away when I reach a certain speed. What could be causing this issue?

It's possible that your Audi A5's spark plugs or spark plug wires are worn out and need to be replaced. This can cause a knocking noise in the engine. I would recommend having a mechanic check them and replace if necessary.