That sure looks like a w126 to me. It seems strange to start with a w126 4-door IMO

Edit:
Where the heck would the engine go? That thing is kind of an abomination I think. I don't know how to translate the text in the one image.

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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,