E-Class (W124) 1984-1995: E 260, E 300, E 320, E 420, E 500 (Includes CE, T, TD models)

Spark Plugs

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Old Feb 20, 2010 | 10:50 AM
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ocpanther's Avatar
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From: OC SoCal
1989 300E
Spark Plugs

i just ordered a new set of Bosch plugs for my 89 300E and didn't notice right away that they are a slightly different number than the manuals call out.

Anyone know what the difference is between the HR9DC and the HR9DC+?

Are these still the right non-resistor plugs for the car?

thanks
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Old Feb 20, 2010 | 01:40 PM
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They are both Resistors. You need H9DC, not HR9DC
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Old Feb 20, 2010 | 02:05 PM
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From: OC SoCal
1989 300E
dammit ... i just noticed that. do you know where/if you can get the non-resister ones? Bosch.

I pulled the plugs to look at them and i had two completely fouled wires. Corroded would be a better description. It doesn't look like they were even locked in. thats what I get for having it done at a crappy little indy shop last time.
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Old Feb 20, 2010 | 04:02 PM
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Peachparts may have a few left for special order. Email phil.
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