Why is my Audi A5 rattling when I accelerate?

I've noticed that my Audi A5 makes a rattling noise whenever I accelerate, but it doesn't happen when I'm idling or at a constant speed. What could be causing this and is it something I should be concerned about?

The most common cause for rattling noises during acceleration is a loose heat shield. Check to see if any of the heat shields under your car are loose and have them reattached or replaced.

Another potential cause could be an issue with your engine's timing. This can cause rattling noises when the engine is under load. It's important to have this checked out by a mechanic as it can lead to further damage if left unresolved.