One problem related to rear seat belt has been reported for the 2000 Mercury Marquis. The most recently reported issues are listed below.
The rear center seat belt of my 2000 Mercury grand marque is defective. When a child seat is belted there, the seat belt strap gradually slides loose through the locking device. The seat belt appears secure at first, but it gradually loosens as the weight of the child seat rocks against it. The belt loosened completely after 30 minutes of driving, and would have been useless in a crash. Fortunately, we discovered the problem before anyone was hurt. We went to duddie Ford of northborough, MA on 1/29/03 and presented the problem.
| Rear Seat Belt problems | |
| Front Seat Belt Buckle Assembly problems |