I've done some searching and found this video of the procedure for a W123:
Outside Door Handle Removal on a 123 Chassis Mercedes by Kent Bergsma - YouTube
Ken mentions that on later models it's necessary to insert the key and turn it in order to remove the handle. I also saw that mentioned in some of the past threads posted here regarding the W126. The problem is that I won't have a key when I try to remove the handle. I'm currently on the look out for a straight drivers side front door to replace the dented one currently on my car. If I find something at Pick and Pull, I doubt that there will be a key laying around.
Any other tips regarding wiring, electric lock switch, etc... ?
Thanks