One problem related to ignition switch has been reported for the 2000 Mercury Grand Marquis. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2000 Mercury Grand Marquis based on all problems reported for the 2000 Grand Marquis.
My ignition key would not come out of the ignition switch with the engine off and the lever in the park position. It took me the better part of 10 minutes of rocking the steering wheel back anfd forth before I could get the key out. Also, one I got the key out and started the engine, and then shut it down. At this time the key came out when I put the lever in park, but the steering wheel would not lock.