Cant you test if there are sparks ?, you get this little tester at auto parts store which shows a red light when you crank. If there are no sparks, then it could be the coil. Does this car have a crank position sensor, without this signal you cant get a spark on my 87, 260E. Have you tried spraying quick start fulid in the air intake ? Is there sufficient vaccum on the intake, between 16 to 22 inch Hg ?

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Saumil S. Patel