I like when people just ASSUME that it's the window regulator when a majority of the time it's not. YES the window has come out of the plastic clips in the regulator that move it up and down. Because of the cheap design (another Ford creation... also found on the Taurus), the wire cable clamp comes out of the holder and causes the cable tobendlaterally. This causes the plastic retainer clip to manuever it's way off the glass, hence, causing the window to "come off track" and fall into the door shell.

So to answer your question... you can by a new window regulator for $495 at the dealership or buy a used one as Ken suggested for around $200. Or you can pull the door panel off, put the cable back in it's holder, and clamp the glass back in place. But, the problem still remains that you must get the door panel off.

There is a plastic "guard" that's behind the interior door handle/lever (to open the door). It can be tricky, but you can pop that guard off and out of the way of the lever. You'll then see a Torx head bolt that holds the latch assembly to the door itself (you don't need to unscrew that... just pointing out what you'll see behind the guard). In the armrest where you would grab to close the door is a little rubber piece down in the bottom (it's got like a mesh imprint to it). If you stick a screwdriver down in there you can pop the rubber piece up and take it out with your fingers. Under that are two phillips head screws. You need to remove these two screws.

Once you remove the two screws, it's just a matter of "popping" the panel. From this point, it's held on by little plastic retainers. To remove the panel, simply go around the door panel with either a panel removal tool or a screwdriver (I usually tape up the end with electrical tape so as not to scratch the paint), in between the panel and the metal of the door. Lift out and away from the door itself with aquick motion, but be careful as not to lift too slow as you may kink, break,or indent the panel material. You'll hear the retainers pop loose and eventually you'll have the whole door panel off. There is a wire connector that you'll have to separate to get the panel completely away from the door, but you may need it still connected to apply power to the regulator to move it up and down to get it back into position.

Finally, to gain access to the interior of the door, you need to remove the moisture guard. This is (usually gray in color),like alarge oval shaped thing that looks like a piece of rubber/plastic. It's held on by silicone so you may have a hard time tearing it away from the metal without having to cut the "bond" with a utility knife. Once that's off you can reach in with your hand, grab the glass, and move it up through the slit (where it would regularly move up through) and take it right out.

Click the switch for the window and inspect that the cables are moving up and down. Probably one of them isn't because the little metal crimp on the metal wire has come out of the holder in the regulator. You can adjust the regulator up or down to get it in the right position to pop the metal crimp piece back into it's holder. Once it's in, push the glass back down through the slit in the door and back into the plastic holders. Tighten the bolts for the plastic holders, put everything back on in the reverse order, and you're DONE!

 

You need a new window regulator. About $180 on ebay and I think about the same at the dealer. Very easy to change.