First remove inner door panel. Have the window all the way up. Inside the door there is a spring type clip that holds the back side of the keypad. I used a pair of needle nose pliers and carefully pulled the clip to the right (or front) of the door. With the clip out the KP might stay in place because of the seal. If you can, wiggle the back of the KP to loosen the seal. Unplug from the harness. Now what I used is a small thin bladed screwdriver to separate the outer housing from the button housing. It will be tricky. So here's my vid of the rest of the repair. https://youtu.be/dIEewWk1p0s

I hope this helps