One problem related to defogger has been reported for the 2003 Mercury Marquis. The most recently reported issues are listed below.
The consumer had to cover up the emblem in the middle of steering wheel due to the sun reflecting from it directly into his eyes, the windshield wipers were replaced, the defroster did not work properly, and there was a vibration underneath the vehicle and the rear end howled, also the vehicle had no headlights,tail lights, brake lights or dash lights.
| Windshield Wiper/washer problems | |
| Defogger problems |