I picked up my S on Monday and the next morning the left rear tire was showing low air, down to 35 PSI. I filled it up as well as all the others according to the inside of the door numbers. Was fine all day. Woke up the next morning. Same thing and all the tires actually came down quite a bit. The one in the left rear is significantly lower at 35PSI and the others dropped to 40. Anyone have any feedback on the sensitivity of the sensors or am I truly unlucky and got a leak on day 1? Do I go back to the service center for this or can I just go to Firestone or something. Assuming the Service Center would be free though.