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Old 02-16-2021, 07:48 AM
Ferdman Ferdman is offline
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Join Date: Aug 2002
Location: Southeastern PA
Posts: 3,077
Check if your car has an ignition control module (ICM) mounted on the driver's side inner fender. It's about the size of a CD magazine that fit the older MB's CD players ... with 4 electrical connectors as I recall. The simplest trouble shooting method would be to temporarily install a known good ICM and see if the engine will start. The ICM's are quite expensive (around $2,500 when I bought one for a 1991 300CE) so you want to be sure that's your problem before buying a new one. You may be able to buy a used one from a salvage yard, but you won't know how long it will last. To maximize the life of the ICM it's important to maintain all the components (distributor cap, distributor rotor, ignition wires and spark plugs) of the ignition system per MB recommendations.
Fred Hoelzle
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