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Originally Posted by inetd
Remember, the plug wires on the Merc 5L V8 are low voltage going to the plugs/coils. I think only 5 volts according to WIS.
I'm with you though. On another post I was asking if the "plug connectors" are more suspect than the coils themselves - and I think you answered the question for me. So I just replaced all the connectors and plugs as well - but NOT the coils. At $100/ea x 8 that gets expensive, and like you said is probably not even necessary. Dealer wanted to replace all 8, I had a new one in the trunk and they reluctantly used that. But it fixed the misfire.
Thanks again for the input
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I have never worked on a car with plug coils. But I do remember the GM HEI distributers had a special inductive adapter and maybe that whats needed in your case. It would apear to me, that to deal with plug coils you would have to move the pickup from coil to coil to get each coil output. I hope a younger tech can enlighten us here. Also I wouldent be to quick to not replace coils on these cars since I know some systems have coil replacement service intervals in the 100,000 mile range. I dont know what Mercedes is doing with this.
John Roncallo