I have had ongoing problems with low tire pressure. Last week the right front tire inexplicably went flat. The flat was replaced with a brand new Continental tire. A day after that replacement, I checked the pressure. The valve on the tire was defective.. I would not have noticed it until I removed the cap to check the pressure and heard air escaping. The other tire on the left front also has a problem maintaining air pressure. I told the dealer to check the tire and the dealer says there is nothing wrong. This can't be since the tire lost pressure only after placing air in it a day or so prior. This car is only 5 months old. Yet. I have had to place air in the front tires before I go anywhere. It is now at a point where I have to check the tire pressure before using the car. I drove a Mercedes for 13 years and never had one problem with the tires. Before that a Toyota for 5 years and again never had a problem with a tire spontaneously losing pressure. This is the 2nd X type I have had. I had a similar problem with the right rear tire on that vehicle. At that time I was told it was a nail hole. Yet, N after that alleged hole was repaired I had ongoing problems with low tire pressure. I wrote it off as a service problem. Had I realized that this tire problem was more than an isolated incident on one vehicle li would have never had leased this vehicle again. When I reviewed this website as to complaints I was shocked to see almost 15 complaints since 2002 of tires deflating and blowouts. This problem must be investigated before there is a serious fatality.

- Hicksville, NY, USA