Doesn’t it only go on in one orientation?

Here’s a w124 m104 flex disk on a custom flywheel. They have three holes on one of the sides of the crank bolts.




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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,