Do you all know if the part is the same on all 113s? The SL shop has it but says it for a 113 through 1967. I've got a 69 SL. I'm trying to get ordered but seem to be confusing them as they don't seem to understand what I'm talking about via email.
Dana,
no, there were at least two different parts.
On a 230SL the power steering pump was p/n 127 460 05 80 and it came with clamping screw p/n 180 466 00 74.
Later on (unfortunately I don't know when) the pump became p/n 127 460 12 80 and the clamping screw p/n 180 466 01 74.
In any case the part was also used as a tensioner for the alternator on Finntails.
I believe ( = not sure!) the earlier clamping screw was a bit shorter and perhaps skinnier than the later one.
Here is a photo of the later screw.