Not so fast about that one...Mine does that when going over speed bumps, and almost constantly when driving rough dirt roads. Sounds like you flick a spring..."BOINGGGG". It's annoying and embarrassing when you have to explain what that noise is to passengers. A few other people have reported a similar sound on this forum. I can't figure out what is vibrating...nothing seems loose. I will live with it until my first service. Hopefully others will have reported this issue to the service manager, but I doubt it. If it happed to you, you'd hate it too.
SOUNDS JUST LIKE THIS:
View: https://www.youtube.com/watch?v=Q-3qnJxEYmc