Two problems related to rear seat belt have been reported for the 1999 Mercury Villager. The most recently reported issues are listed below.
I have a 1999 Mercury Villager purchased from blue hill Lincoln Mercury in canton, massachusetts. I have a problem with the seat belt mechanism on the 2nd row of seats on the far left side. The belts will intermittently lock up trapping the passenger suddenly. The only recourse is to unbuckle them and reset them. This problem occurred once before and after much argument the dealership reluctantly replaced the mechanism. Now I am having the same exact problem and since I cannot demonstrate the problem on command, the dealership refuses to replace the faulty mechanism.
The sea belts on passengers (back seats) lock most the times and sometimes I have to move my daughter to the front and my wife to the back seat because we cannot use the seat belts, took van to the dealer on my first year or second and even they said they fixed (never got the paper work and I even requested since was under warranty). A friend of mine who own's a van like mine has the same problem.