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Old 12-17-2000, 09:08 PM
'80 450 SEL
Posts: n/a
Is the 1980 450SEL CIS injected?
Does this model require resistor equiped plugs?
Any suggestion on good plugs?
I am having problems with this car not giving a spark and considered replacing the coil as I believe this may be the problem. I have tested with a screwdriver at the plugs and I see no arcing from the ignition system. I have removed the cap from the distributor and it looks to be in good condition, no deposits on the points/blade. Are there any other tests I can run to isolate the problem? Help is greatly apreciated.

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Old 12-17-2000, 09:16 PM
Join Date: Mar 1999
Location: Tucker, Ga USA
Posts: 12,153
MB never used resistor plugs.
Test for trigger signal from ignition module to coil. You can use a test light on negative side of coil. Should flash the light durning cranking.
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Old 12-17-2000, 09:56 PM
cth350's Avatar
Registered User
Join Date: Dec 2000
Location: Long Island, NY
Posts: 4,197
Do it right. Get the manuals. Benz makes some very, very fine manuals. All of the books for you car are collected on one CD for about 99$. They cover chassis, engine, Electrical, climate control.


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