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Old 02-29-2004, 11:11 AM
Evan's Avatar
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Join Date: Nov 2003
Location: Fairhaven MA
Posts: 299
Updating Ignition Coil? (W124)

Hey everyone,, would replacing my ignition coil with something aftermarket cause for power gains,,, or make the car run smoother and more efficiently?? If so, are there any recomendations? I know the ignition systems on these cars can be touchy..

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Old 02-29-2004, 02:07 PM
Join Date: Dec 2001
Location: Southern California, U.S.A.
Posts: 8,538
It helps if you post the year and model of your car.

1986-1992 300E's have one ignition coil.

1993 300E's (3.2) and 1993 300E 2.8's / 1994-1995 E320's have M104 engines and have three ignition coils and three high tension leads.
Paul S.

2001 E430, Bourdeaux Red, Oyster interior.
79,200 miles.

1973 280SE 4.5, 170,000 miles. 568 Signal Red, Black MB Tex. "The Red Baron".

Last edited by suginami; 02-29-2004 at 04:26 PM.
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Old 02-29-2004, 02:45 PM
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Join Date: Feb 2003
Location: Ontario, Canada
Posts: 3,160
Beware of the hype of aftermarket coils.
Most of them advertise 40, 50, 60 k volt outputs.
Under normal circumstances, a stock engine will never require more than 20 k ohms.
Nowadays, even stock coils are capable of producing 40 - 50 k volts without problems.
If you were to fire at 40 - 50 k volts, chances are your plugwires would start to fire through the insulation, to ground, in a very short time.
Long story short, todays OEM ignition systems DO NOT require, or benefit, from aftermarket hypo-gadgets.

2007 C 230 Sport.
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