I have a 1984 MB 500SL, it is the 1st 500SL. It is at my dad's in Vegas and is barely driven. Brought it in for a brake job 2 years ago and put 250 miles on it since. The front right brake is binding, while driving the car pulls to one side and the same on braking.

When jacked up I can barely turn the wheel, I take the wheel off and cannot turn the rotor. I open the bleeder screw and it turns, I bleed it, close the screw drive the car and the same problem. OK I figure bad caliper so I put a new on on. Same problem, any suggesstions?