Update: Just got off the phone with corporate Jeep customer service, and they were very helpful and understanding. My case has been escalated to a case manager and should be hearing back from them after the holidays. I have not been guaranteed that the headrest will be covered, but there is a good chance that it will be since it is a manufacturer defect and the dealership where I took it this morning has seen this defect in several local WK2s. As I get updates I will post for others that may have this issue in the future.