Thread: '92 300e
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Old 05-19-2003, 01:04 PM
Duke2.6 Duke2.6 is offline
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Join Date: Mar 2003
Location: Southern California
Posts: 2,055
Have you checked your owner's manual?

H9DC0 is the OEM plug. The "0" suffix indicates a "heavy duty" electode.

The H9DC standard electrode version is also perfectly acceptable, and they are less expensive.

These are proper non-resistor plugs for Mercs as indicated by the lack of an "R" is the plug designtion.

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