One problem related to body has been reported for the 2003 Mercury Grand Marquis. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2003 Mercury Grand Marquis based on all problems reported for the 2003 Grand Marquis.
While driving at dusk on my way home (with my 5 year old little girl!), my headlights shut off without warning! we were fortunate that several drivers in the oncoming lane were concerned and conscientious and flashed their high beams to signal that something was wrong. Deductively, I ruled out my lights being off because the switch was on. That was until the traffic light turned red and I saw no reflection on the back of the car in front of me! I flipped the switch off then back on again to see if it was a bad connection in the switch or perhaps it was between positions and would possibly work if I repositioned it. No good! ugh, the light went green! I nervously pulled at the bright light selector to see if they worked! just in time to barely miss the SUV that obviously did not see us!!! I did not let it go untill we were safe at home!!! phew!!! I guess now would be the time to change my pants!.