One problem related to door latch has been reported for the 1998 Lincoln Navigator. The most recently reported issues are listed below.
Consumer stated that yesterday she placed her granddaughter in car seat after unlocking the vehicle. When she shut the door on the passenger's side rear, the vehicle locked. After the door locked she went inside and had someone call 911 because her grandchild was in the vehicle. She lives in California, because of the heat she had the side panel window broken behind the driver's seat. This has happened once before, but consumer did not think anything of it, she thought that she had locked it herself. Consumer has not contacted the dealership and manufacturer yet.