Hello, are you experiencing overheating? Is your temperature gauge high? I'm not sure why you're trying to fill above max?
Use this link to find some shops near you that can help with your concern:
www.repairpal.com/repair-shops
RepairPal Certified shops can diagnose and repair your 2007 Dodge Charger. They provide transparent pricing with a minimum 12-month or 12,000-mile warranty on repairs and services.