I also noticed this about 2 weeks ago and I can't figure out if it's coming from under the driver seat, the center console, or the shift stick area. It's only happening when turning (left or right), accelerating, or stopping harder than normal.
It almost sounds like something is sliding and then clicks. I've taken everything out to make sure nothing in the center console, glove box, or other storage locations are causing it. Even thoroughly checked under the seat for anything that might be loose.
I was going to say something to the dealer about it, but after reading up on this I'll try the greasing it before jumping through hoops with the dealer.