Why does my Audi A6's engine make a rattling noise at startup?

I've noticed that my Audi A6's engine makes a loud rattling noise upon starting the car. It doesn't seem to affect the performance, but I'm worried it could be a sign of a larger issue. What could be causing this noise and what steps should I take to address it?

The rattling noise at startup in your Audi A6 could be caused by a loose bolt in the engine mount. It's important to get this checked out as soon as possible, as a loose bolt could cause damage to the engine over time. It's recommended to take your car to a certified Audi mechanic for an inspection and potential repair.

Sometimes, a rattling noise at startup in an Audi A6 is simply a result of the engine components settling after being turned off for a while. However, if the noise persists or becomes more severe, it's worth getting it checked out by a professional. It's always better to be safe than sorry when it comes to your car's engine.