Lock/unlock pushbutton is sunk back into the door panel

Above the door handle you have the part you pul the door closed with, if you look to the bottom of it you will see a long piece of plastic, you need to lift this out , under that are two screws, take them out, then look for the little lite located close to the edge of the door, this light will just pop out, behind it you will find another screw, remove it, now look in the round heater hole located towards the top inner part of the door pannel and you will find a little plastic plug, with long nose plyers gently grab it and pull it out.you will have to remove the plastic molding around the handle, just use a flat head screw driver and pop it out
Now all you have to do is grab hold of the whole door panel and lift and wiggle it up, it is held in place by plastic hooks, don't worry to much as they are pretty sterdy, you must becareful not to move the panel to far away at first cause there are plugs you will need to undo, it is all really very simple if you take your time.
All the door panels come off the same way. good luck and have fun, I have had the same broken button and many other things, just today I had all the plastic trim around the floor and roof off and the whole head liner out to repair my sunroof moter.