You should be able to simply go into the EPC for the m130 and get all the 130.xxx numbers and determine where each was used. If the 4th-6th digits used for the w109 are different than the ones used for the injected w108, then you probably know there's something different for sure. I would. It expect the numbers to be the same as the w113 m130 because I believe the exhaust manifolds are under the engine section in the EPC. I don't have access to the EPC right now.


Edit: it is possible for the same engine numbers to be used with different cams and pistons. So even if the w108 and w109 cars used the same engine number, it doesn't mean that different pistons and cams aren't used.

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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,