Why is my Audi A4 making a rattling sound while idling?

I recently noticed that my Audi A4 is making a rattling sound while idling. It seems to go away when I accelerate, but returns when the car is at a stop. What could be causing this and how can I fix it?

Hi Jason, thanks for reaching out. The rattling sound could be caused by a few different things. One possibility is that your car's exhaust system may be loose or damaged. Another possibility is that there is an issue with your engine's timing belt or pulleys. It's best to have a professional mechanic take a look at your car to determine the exact cause and provide a proper fix.