One problem related to headlight concealment device has been reported for the 1998 Mercury Marquis. The most recently reported issues are listed below.
Headlight lenses malfunctioned due to frost on the outside lens. The consumer's vehicle was almost involved in a collision due to lack of visibility. The consumer was unable to see far down the road which would normally be fine and narrowly avoided hitting a parked vehicle and had to use the high beams. When the high beam lights were used, oncoming vehicles did not signal the consumer to switch back to the low beams.
| Headlights problems | |
| Headlight Concealment Device problems | |
| Headlight Switch problems |