09 dodge caliber. vibration of entire car in what manufacturer calls wind buffeting defect. start of vibration at 45 to 50 mpr. back windows rolled down and front window cracked. car vibrates causing it hard to control vehicle. salesman and salesmanager stated this was common in all small sedans and compact cars that they carry on lot. was told to drive vehicle with windows up!they had never experienced this in any test drive. they only drove with all windows down. took another 09 caliber off lot to see if it would also vibrate; it did the same thing. if nothing else can be done tell manufacturer to make back window that don't roll down (for the kids that ride in back seat). *tr