One problem related to radiator has been reported for the 1997 Mercury Mystique. The most recently reported issues are listed below.
Engine check light came on, independent service station detected possible problem with thermostat. Dealer replaced sensor, charged $211. 00. Two days later light came on again. Dealer detected thermostat, had to order part and replaced. Two weeks later temperature 20 degrees, car took over 30 minutes to heat up and ice formed on the inside of the windshield. Will take car back to the dealer.