keyless door lock

I just bought a 1999 Mercury Grand Marq. I have 2 remote controls that work for all functions but dont know the code for the keypad on the door. The taurus that I had had the 5 digit # inside the trunk lid. How can I find out the original 5 digit # for the mercury? I can look if I knew where to look.

If you haven't found it yet, it should be on the trunk "rails"... Should be passenger side, on a sticker stuck to the supports for the trunk (that attach to the swivel)....