I just got my Mazda3 this week. Its a Silver Automatic Sedan. Im curious about the vents in the back near the rear windshield. My salesman told me they were pressure vents for when you shut the doors so that the pressure doesn't cause your ears to pop. Anyone familiar with that? Also, I had a problem with rail dust, I'm having to take the car back to the dealer to get the paint treated. Has anyone else had this problem. Other than the rail dust, I love this car! (rockon)