Where do you live? I'd be looking for an organization that provides arbitration between you and the dealer / manufacturer.I found a crack in a front windshield last week. The crack occurred while the car is parked with nobody inside the car. Only the inner layer of the windshield cracked all the way from top to bottom in the middle. Outer layer is intact and there is no damage including chips, cracks, or scratches. I believe it's a stress crack and should be covered under warrenty. I filed a case with KIA but so far they do not agree that the case should be covered under warrenty.
In Alberta, for dealer arbitration there is AMVIC (amvic Consumer Information).
In Canada, for manufacturer arbitration there is CAMVAP (arbitration services, mediation arbitration - Canadian Motor Vehicle Arbitration Plan).