FWIW, I used the search button and came up with no Octavagon, is that the right nomenclature?
Basically is a LWB modified 123 chassis, 1981, with a 240D and a stick shift tranny, sort of a LIMO looking car (boy I'd hate to parallel park this one!)
There is a strange second instrument cluster housing in the center of the dash.
See auto FS post I made today:
http://www.peachparts.com/shopforum/showthread.php?p=731644#post731644

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'95 E320 Wagon my favorite road car. '99 E300D wolf in sheeps body, '87 300D Sportline suspension, '79 300TD w/ 617.952 engine at 367,750 and counting!