Table 1 shows one common unknown or other related problems of the 2004 Mercury Grand Marquis.
| Problem Category | Number of Problems |
|---|---|
| Unknown Or Other problems |
2004 Mercury Grand Marquis headlight will not come on. Must hold high beam lever to use headlights and drive with one hand. I replaced the light assembly didn'thelp.
I own a 2004 Mercury Grand Marquis LS that unexpectidly goes into unintended acceleration when slowing down or stopping vehicle. I never know when the unintended acceleration will occur. First noticed problem at about 24000 till now at 71000 miles. The problem occurs usually in a line of traffic as I am slowing down or slowing down to stop at a stop sign or traffic light. Or parking the vehicle. Suddenly the engine starts racing and sometimes the vehicle will jump forward rapidly (sudden unintended acceleration). I have to apply the brakes rapidly and with extreme pressure to keep the vehicle from hitting the vehicle in front of me or to keep from running a traffic light or stop sign. Most of the time when the engine races and I apply the brakes the rear wheels willl continue to spin at a high rate even to the point of causing the rubber on the tires to smoke and still try to push me forward. After applying the brakes I must turn off the engine using the key to stop the unintended acceleration. This is a serious safey problem. I noticed the problem not long after purchasing the car and reported it to the dealer dub herring Ford in picayune, ms. While the car was still under warranty. They didn't do anything to check or fix the problem. They seemed not to worry or be concerned about this problem! I reported the problem several times to the dealer with no success. I then reported it to the Ford motor company several times and they refered me to the dealer which didn't do anything to fix the problem to start with. I then took the car to an independent repair shop and they tried to find out from the dealer and Ford CO. If there was a recall or notation or fix for the problem. The independent shop said the dealers and Ford CO. Wouldn't give him any information concerning the problem. They asked me to contact Ford motor CO. And see if I could get any response for a fix or repair and got no help from them. I am lodging a formal complaint against Ford and the dealer.
The nighttime head lights failed on the Mercury marquis. 2004 model; we brought the car into the dealership to have the module replaced which is expensive.