I was just thinking out loud whether it would be possible to bolt one of these manifolds onto a M104? Isn't the M120 two M104s joined together? No idea where in the world one could find a manifold to even try.....

I mean, theoretically yeah it should bolt right up. Though I can only assume that one of those headers probably costs more than the majority of our whole cars is worth.

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1993 190E 2.6 Sportline

The far right exhaust port appears to have 3 bolts where the others have 4 per port. From what I recall, all ports of a M104 have 4 bolts.

A quick check of a SL600 M120 and SL320 M104 exhaust manifold gasket part number would tell the tale.

Nope, that's normal for the M104 too.

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1993 190E 2.6 Sportline

No way that would fit in a w124 engine bay. I started off mine with that picture in mind.
The rear 3 cylinders are to far out to the side for sure. And I am sure that they cost more than any custom set you could have built.

Has any one ever even seen any of these for sale?

Would love a pair!