The engine will fit, BUT would require a lot of "special" parts to make everything work. IN 1973 MB sold the 280C(W114.060) with a M110 carburetor engine.
In Germany they had a 280CE(W/C114) chassis but that car had EFI fuel system & different intake manifold.
MERCEDES Benz Master Guild Technician (6 TIMES)
ASE Master Technician
Mercedes Benz Star Technician (2 times)
44 years foreign automotive repair
27 Years M.B. Shop foreman (dealer)
MB technical information Specialist (15 years)
190E 2.3 16V ITS SCCA race car (sold)
1986 190E 2.3 16V 2.5 (sold)