[Jerrys]

Just got my Q4 a week ago. Similar rattling to what you describe but coming from passenger side front. I did the following which seemed to help so far:

-reduced tire pressure from the 51psi the car came with to the 42psi noted on the driver door as the recommended pressure

adjusted the bumpers under the hood that hold the hood firm against the latch when closed. Prior to doing that the hood would give when I pressed down on it after it was latched. Perhaps the hood was vibrating and making noise on bumpy roads?

-removed the hard objects I had put in the glove compartment (flashlight etc) in case that was contributing

Will see how it does the next few days. If no more noise, will restock the glove compartment and go from there. If still rattling then will bring the car back to the dealer to figure it out.

 

[Jerrys]

Press down on your hood when it is closed. If there is give then that may be the problem. It was for mine. There are two plastic bumpers under the hood that con be adjusted to hold the hood tighter against it's latch when closed. If you slide the collar on the bumper out, you can then twist the bumper countercloskwise to have it extend a bit further from the hood. If you go too far the hood won't latch. Don't forget to slide the collar back in to lock it. Easy to do. Worked for mine.