Why does my Audi A8 make a rattling noise when I start the engine?

I've noticed that when I start my Audi A8, there is a rattling noise coming from the engine. It only lasts for a few seconds and then goes away. Should I be concerned about this noise?

It's possible that you have a loose heat shield on your exhaust. It's not a major issue but you may want to get it checked out by a mechanic.

It could also be an issue with your timing belt tensioner. This is a more serious issue and should be addressed by a mechanic as soon as possible.