I just did this. And yes, if you remove the female-female coupling from the injection pump, you can see the mark on the male gear that you line up with the mark that’s at something like 10:30 on the injection pump housing.

Then I struggled a bit with the harmonic balancer marks because on my 280se there are two sets of marks, 40 degrees off. I used a plastic straw to find the true cyl 1 TDC and then later learned why there are two sets of marks. Let me see if I’ve still got the pic in my phone...


I think I have the later style shown in the pic with the triangle.

Ironically, I’ve got a 1967 250se (4-speed) in the garage I need to do this on next. The 280se is my “learner” parts car that’s all rotted with no title.


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Past mb: '73 450sl, '81 280slc stick, '71 250, '72 250c, '70 250c, '79 280sl, '73 450sl, parted: '75 240d stick, '69 280s, '73 450slc, '72 450sl,