Yes. I have replaced the flange nuts before on W115 and W123 (it is the same part), and back then I knew someone who had the 4-pronged tool. That was more than 10 years ago, though, and that person is long gone and I have no idea where his tools went.

Just to be sure I trial fit my new nut to the output shaft of a junk transmission I have and it threaded right on. This particular transmission is an older unit than what it is in the '74.