Why is my Audi A1 engine making a strange knocking sound?

I've recently noticed a strange knocking noise coming from my Audi A1 engine when it's idle. It seems to go away when I start driving, but returns when I come to a stop again. I'm concerned about potential damage to my engine. Can anyone shed some light on what could be causing this and how to fix it?

Based on your description, it sounds like there may be an issue with your engine's timing or a loose belt. It's best to take your car to a certified mechanic for further diagnosis and repair.

I had a similar issue with my Audi A1 and it turned out to be a faulty fuel injector. It's important to get this checked and replaced if necessary to prevent further damage to your engine.