I just spent about fifteen minutes looking in the Mercedes Factory service manual for that time period. I found numerous references to a CIS injection system but did not find any references to a K jetronic system. Perhaps you can refer me to the page where that is mentioned....?

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[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual.[SIGPIC]

..I also have a 427 Cobra replica with an aluminum chassis.