I picked up a new S on Friday. Since Friday I've had to inflate the left front tire twice. It seems to be losing about 5lbs a day. The delivery guy inflated it upon delivery as well. I called service this morning to ask them what to do about this and they told me to use a local tire place (I'm 100 miles from the closest service center). He also said there was no warranty on tires. I completely understand if there is no warranty on tires, but the car has 150 miles on it and this problem was obviously present upon delivery as evidenced by them filling it up right before I left. I have not had this serviced yet. Has anyone had experience with this? Am I truly on the hook for a new tire if they shipped me a defective one? I never heard of such. Every other car I've owned came with a separate tire warranty from the manufacturer on a new vehicle.