Remove the switch panel by prying upwards with a flat screw driver once the panel pops out the group of switches will have some screws usually 4 or 5 then pry around the locking tabs it should pop out allowing you to remove each individual switch.
See info here on how to do it on a 1997 model...
http://www.autoclinix.com/Mercury/Front%20Speakers.html
I think there is an additional screw in your 2002 model behind the power window switch panel that also has to be removed.
I would add (having removed them many times on my '03)...
there are two 7mm screws on the bottom of the door that must be removed. Then pull (from the side, not the top or bottom!) the small clip inside the door handle. You'll need a T-30 to remove the screw underneath that holds the door handle in place. Lift up (from the front!) the window switch panel and disconnect the wires. You may find an additional screw that needs to be removed (may be phillips or 7mm head). Check to make sure you don't have any additional visible screws. The door panels then lift up to come off. If they give you any resistance you either missed a screw or you are pulling out instead of up.
Remove 4 Phillips head scews along outside edge of panel.Remove 3 popout plugs from top left mirror corner cover -bottom left corner and door handle cover. Remove those 3 Phillips screws.Remove mirror and door handle covers.Roll down window.Pull out bottom of panel and out on door handle at the same time until handle clear panel. Reach behind panil and release wire harness.Press in on the top corner of panel and up on bottom. [there is a u shaped lip at the top of panel you are trying to free panel from]
See linke below...
http://www.autoclinix.com/Mercury/Front%20Speakers.html
...
how to remove the door panel on a 1992 mercury cougar
On a 2000 Mercury Mystique : The fuel pump shut off switch ( inertia switch ) is in the drivers footwell behind the kick panel ( The interior trim panel in front of the door by the drivers left foot , there is an access hole through the panel )
The door lock, on your 1999 Mercury cougar, can be replaced by removing the inside door panel. The locking mechanism is easily visible and can be changed.
This information will be either on the door or the door jamb.
5'8
On a 1999 Mercury Mountaineer : ( # 17 is a 25 amp fuse for the cigarette lighter ) * in the fuse panel IN the drivers end of the dash ( the fuse panel cover is visible with the drivers door open )
How to take the door panel off a 2002 mercury mountaineer?
how do you remove a right door panel on a 1999 Ford Mustang?
how do you remove a right door panel on a 1999 ford mustang?
If you remove door panel you should have access to unit
A door panel on a 2004 Mercury Mountaineer is held on by several screws. Once all the screws are removed the panel can easily come off.
how do remove a 1999 ford mustang interior door panel