Mercury Grand Marquis owners have reported 2 problems related to defogger heater (under the visibility category). The most recently reported issues are listed below. Also please check out the statistics and reliability analysis of Mercury Grand Marquis based on all problems reported for the Grand Marquis.
1997 Mercury Grand Marquis has 21,000 miles. The air blend door has broken causing no warm air to vehicle interior and a constant clicking noise behind the instrument panel. There is no warm air to defrost the windshield causing a visual safety hazard.
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all problems of the 1997 Mercury Grand Marquis
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While driving 55 mph consumer noticed smoke coming from under the hood. Dealer determined the plastic intake manifold had cracked, causing all coolant to leak from vehicle. Ts.