After doing some reading, I had a mad scientist idea, but no clue as to the feasibility, and probably no skill or money to carry it out right now. Wondering if anyone knew if you could put spark plugs and a distributor on an OM616 from 1980 240D. It's to make a "Homogenous Charge Compression Ignition Engine" that is, possibly a more efficient than diesel ethanol engine. Totally pie in the sky, as I only have auto mechanics 101, I was just interested in the possibility, as I saw a few nice holes near the cylinder head with nice threads on them and everything. Thanks!