On Friday morning I increased the pressure in my P85D's 19 inch Pirelli Sottozero Series II snow tires (which are coming off in two weeks) from 46 PSI to 50 PSI, as per the new Tesla recommendations. On Friday afternoon I drove the car for the first time after increasing the tire pressure, and heard a vibration / rattle sound that I had not heard before that sounded like it was coming from somewhere around the dashboard, on the passenger side, after the car went over any small rough spot or seam in the road. I've driven the car a few more times today, and the vibration / rattle sound has persisted. Tomorrow, if I can get my wife to cooperate, I am hoping to get her to drive while I sit in the passenger seat and try to isolate where the sound is coming from. If anyone has experienced this, and can point me in the right direction, I'd certainly appreciate it. But I'm mainly interested in knowing if people think this new vibration / rattle sound could have manifested itself because of the four pound increase in tire pressure. If not, it's awfully coincidental. Thanks.