I haven’t noticed it on mine, but now I’m going to pay extra attention next time I’m driving. Does it only happen on certain road surfaces or speeds, or is it constant? If it’s consistent, I’d let the dealer check it out.
Can you feel anything with your hand when the rattle happens? I wonder if the airbag cover is rubbing against something. Be careful not to set off the horn, but try gently twisting or reseating the airbag cover to see if that helps. Good luck!