Hi all.. Just wanted to get some opinions on an issue I'm encountering... 2011 dodge charger rt with factory 20" wheels and tires... Bought brand new from dealer in Kansas City Missouri.. I have had vibrations going highway speeds from day one purchased the car April of 2012. I have had it in the service dept several times and each time they note the vibration and say either drive it some more or we can't find anything wrong, and the new one today is the tires are cupping and there is nothing we can do??!!!! Really dodge I just want the thing fixed I am still under warranty... Can anyone give me any suggestions? I have called Chrysler and they are assigning me a mediator, but who are they going to side with really?