Why does my Audi A3 engine sometimes make a rattling noise when starting?

I've noticed that when I start my Audi A3, it sometimes makes a rattling noise for a few seconds before settling down. Is this something to be concerned about?

This can be a common issue with the Audi A3. It is most likely due to the variable valve timing (VVT) solenoid being dirty or failing. It is important to have this checked and replaced if necessary, as it can lead to bigger engine problems down the road.