One problem related to door latch has been reported for the 1996 Mercury Mystique. The most recently reported issues are listed below.
The door latch on driver's side would not shut, had to go to junk yard to get a part and put it in. This happened on August 20, 2005. Consumer bruised hand trying to get the down shut. There was clicking noise in the panel on the driver's side that controls the power windows. Also, the key got hot in the ignition.