Two problems related to power train have been reported for the 1997 Mercury Grand Marquis. The most recently reported issues are listed below.
Put car in park, and it showed to be in park. But, it was in reverse, going backward, and almost caused an accident.
Coolant leak from crack in plastic intake manifold. This car only has 97,130 miles on it and well cared for. They should not be using plastic in this application - it should be iron or aluminum. This is a common problem I was told with the 4. 6 v8 engine. Ford needs to recall these and replace at no cost to customer. I will be writing a letter to Ford if the dealer doesn't cover this as a recall. Ridiculous to use plastic in this application.