Thanks for the replies and ideas, very much appreciated. I didn't realize when I did my google search for stuck caliper that this was a thread in a Mercedes based forum so I appreciate the help.

It is my dads old work truck, 1994 Mazda B3000. As Barry mentioned, now that I was able to watch, the caliper does retract ever so slightly. Slight friction and turns with a little drag. The odd (to me anyway) of those hammer in caliper clips you tap in (not the bolts I'm used to working with). I replaced the passenger side caliper and brake lines. Bled it from the back to front and it seems to be working now. The one thing I did was on the clip, I might have hit them in to far instead of centering it so the outer pad glides, but gives the inner fender wall side where the caliper is, room to retract slightly.

I'll know for sure tomorrow as I only test drove it down around the neighborhood and back...road test tomorrow to see if it's fully good to go.

Thanks again for the advice and troubleshooting ideas!

Tim