Why does my Audi A3 make a strange noise when starting?

Recently, I have noticed that my Audi A3 makes a strange noise when I start it in the morning. It sounds like a knocking or rattling noise. What could be causing this and should I be concerned?

This could be a sign of a worn out starter motor. It is not uncommon for the starter to make a noise when it is on its last legs. It is best to have it checked by a professional mechanic to avoid any potential problems down the line.