One problem related to turn signal has been reported for the 2008 Mercury Grand Marquis. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2008 Mercury Grand Marquis based on all problems reported for the 2008 Grand Marquis.
The gear shift id on the dash board has quit working, and we can only identify the gear that we have engaged by feel. Also, we have a recurring problem with the left rear turn signal flash going bad. When this happens, the turn signal flashes at a super fast rate. Both of these problems are safety issues. The gear shift problem happened while the car was stationary, the turn signal problem happened while making a left turn.
| Headlights problems | |
| Exterior Lighting problems | |
| Turn Signal problems | |
| Hazard Flashing Warning Light Unit problems |