Vibrations felt through the steering column, seats and floor, whenever car is in gear and stopped at a light or idle. vibration gets worse when ac or defrost is turned on. it goes away when i put the car in neutral. however car takes some time to move when shifting back to drive, and this can cause someone to hit you from behind. taken to the dealer 3 times. i was told that this vibration is completely normal and there is nothing that can be done. very disapointed to say the least.