I was about to suggest a Dash Rattle, but is less likely because you say it happens even when at standstill. Most cars have it while going over bumpy roads. But maybe your engine vibrations etc are causing enough movement to make the very common Gen4 Dash Rattle appear.
It's a simple test to confirm it, press down somewhere on the LH side of the dash, and it usually stops. We sell inexpensive Dash Rattle stoppers to fix that issue, if you find out that's where it is coming from.