Hello, well, there's data to be found out there with use of a diagnostic tool and some repair manual instructions. The car should be able to be tested to find out if you have a cabling issue, starter motor issue, battery issue or something else.
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 2013 Lincoln MKX. They provide transparent pricing with a minimum 12-month or 12,000-mile warranty on repairs and services.