Dash noise / rattle

[Riteoff]

Hey guys, I recently bought my m37s love the car, but of course I'm not expecting it to be perfect, due to the fact it's a used luxury car lol. So anyways there is this very annoying rattle behind the dash by the center speaker and vents. Mostly hear it when I hit bumps some bass lines also cause it to sound off. I was only hoping some one else has experienced this, and hopefully solved it so hours of diagnosis doesn't have to be performed! Thanks for any input

[Frog]

When you replace the front window put a little bit of felt liner underneath that part of the dash

[Riteoff]

When you replace the front window put a little bit of felt liner underneath that part of the dash

Heard so you had this issue too? Seems like a strange fix considering where the sound appears to be coming from, but I'll definitely start there. How did you discover that by the way?