Advice regarding quadfire plugs? - Mercedes-Benz Forum

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post #1 of 3 (permalink) Old 06-20-2006, 08:01 AM Thread Starter
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Lightbulb Advice regarding quadfire plugs?

I just got the 60k mile service done on my Hyundai, and asked the stealership to put in quadfire plugs. They balked, telling me that they run too hot and installing them would nullify my warranty (I say bull...).

When I first bought my Benz 7 months ago, I looked at quadfires, but a local Mercedes guru told me the temp range isn't that great and that quadfire plugs aren't recommended for colder climates.

So what's the skinny here? I put qads in a friend's Camaro, and the car had a NOTICEABLE performance increase, so why not a nice, older Benz?

Any ideas/advice/testamonies?
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post #2 of 3 (permalink) Old 06-21-2006, 03:23 AM
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Most of the older MB have resistors in the booth of the ignition wires, but Bosch doesn't make the correct non resistor sparkplugs anymore which leads to problems. NGK and Champion make a non resitor plug that works well. I removed Bosch platinum + 4's after one week. Dont waste your money. A too hot burning plug can put a hole in your pistons.
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post #3 of 3 (permalink) Old 07-11-2006, 08:48 PM
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Thumbs down Quadfire plugs another joke

I have found that quadfire plugs produce too small a flame front for these to be used in a non transistorized Mercedes-Benz ignition and have a real performance boost. I have a 1963 220SEb with the distributor, points etc. My car runs much better with the Bosch Super plugs that have a copper core. Good Luck!
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