We need some more information to help you figure this out.

Can you verify what engine you actually have? A 200T would be a 4-cylinder gas engine with a carburetor. "123280" does not mean anything to me.

Does you distributor have points, or is it the newer type without them?

What type of box was used to replace the MB unit? How is it connected?

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Chuck Taylor
Falls Church VA
'66 200, '66 230SL, '96 SL500. Sold: '81 380SL, '86 300E, '72 250C, '95 C220, 3 '84 280SL's '90 420SEL, '72 280SE, '73 280C, '78 280SE, '70 280SL, '77 450SL, '85 380SL, '87 560SL, '85 380SL, '72 350SL, '96 S500 Coupe