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Old 05-29-2000, 09:18 PM
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There was an interesting post reply regarding this several months back. To cut to the core of this reply. The person had observed the spark in a spark plug testing machine. The platinum plug has a very small diameter center electrode which produces a very thin spark. The larger electrode of a copper core plug producers a fatter spark. I have had platinums in my 300E for quite some time. I learned about the platinums, have bought a set of copper core plugs, but haven't put them in yet. I wouldn't break a leg getting out there to change them. But do change them when it's convenient.

Good luck,

Larry Bible
'84 Euro 240D, 516K miles
'88 300E 5 Speed
'81 300D Daughter's Car
Over 800,000 miles in
Mercedes automobiles
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