Thread: 1991 300E - Which spark plug is right???
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Old 03-09-2014, 03:50 AM
Ivanerrol Ivanerrol is offline
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Join Date: Jan 2008
Location: Melbourne Australia
Posts: 845
Sorry last week I had to pull the resistor plugs out of my W202 as they were causing a slight misfire when cold. Plugs were only 12,000 kilometers old.

Installed correct NGK copper non- resistor plugs - BCP6ESF all is now well.

These same plugs are the correct variant for a M103, early KE M104.

NGK BCP6ESF. If you do a lot of stop start traffic you can install the BCP5ESF
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