Do you have a Pertronix Ignitor ignition? It is very simple, bypasses ALL the MB ignition stuff and fits in the distributor. If you use their coil you don't even need the resistors. dosen't get much simpler and you can rule out any ingition problems.

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Tony H
W111 280SE 3.5 Coupe
Manual transmission

Past cars:
Porsche 914 2.0
'64 Jaguar XKE Roadster
'57 Oval Window VW
'71 Toyota Hilux Pickup Truck-Dad bought new
'73 Toyota Celica GT