Can't find the info. on what I ended up using. My '84 had new MC when I bought it but the brake pedal went almost to the floor. Long story short II purchased another MC which did not work either.
Try the recommended one though I think that is the PN I had no success with. Almost certain I ended up using 004 430 26 01 which is for a 380SL with ABS.
Try Tom at the Classic Center if the one you receive does not work.