Are the NGK spark plugs copper core plugs with no resistance?

Depends. If it has an "R" in the part number or designation, it is a resistor plug. If it doesn't, then it most likely is not.

I should have simply asked ,Does NGK make a copper core spark plug?

Their V-Power plugs are copper. They are coated with another metal but the core is copper and they are very good alternates to the OE Bosch ones we use.

non-resistor plugs usually not available in North America for 300e anyway.Some sold on ebay from UK site,though

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Tom 2010 C250 4-matic Sport (Canada)

They sure are available in the U.S.

The Parts Shop sells them:

http://catalog.worldpac.com/mercedesshop/sophio/wizard.jsp?partner=mercedesshop&clientid=catalog.mercedesshop&baseurl=http://catalog.peachparts.com/&cookieid=1SH0P7SVN22T1AIE5C&year=1992&make=MB&model=300-E-002&category=F&part=Spark+Plug

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Paul S.

2001 E430, Bourdeaux Red, Oyster interior.
79,200 miles.

1973 280SE 4.5, 170,000 miles. 568 Signal Red, Black MB Tex. "The Red Baron".

Note the "R" denoting "Resistor".

did anyone ever find a good source for the old plugs in NA? What about switching the plug wires to reflect the change in resistance of the spark plugs themselves?
Jason

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1988 300CE 120K RIP(Midnight Blue/Parchment)
1987 300E 202K (Arctic White/Palomino)


Now I see the secret of the making of the best persons. It is to grow in the open air and to eat and sleep with the earth. ~Song of The Open Road

(1)those are Bosch,not NGK the OP asked for NGK

(2)those are resistor plugs.

(3) non -resistor plugs Bosch are available but by the special order link,no t the regular link on Fastlane.I cant find the link anymore.Previusly was on a sticky at top of shop forum

(4)ngk non-resistor plugs are available from ebay.co.uk
http://cgi.ebay.co.uk/NGK-spark-plug-BP5EFS-plugs-BP5EF-S-check4-application_W0QQitemZ8041015091QQihZ019QQcategoryZ72205QQrdZ1QQssPageNameZWD1VQQcmdZViewItem

(5)even with the resistor NGK plugs TR5 readily available in NA,,I had no problem but I decided to switch back to non -resistor Bosch ,which was available from the UK before I found out that fastlane had them,but they were 2-3 times resistor plug price on fastlane.

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Tom 2010 C250 4-matic Sport (Canada)

http://www.ngk.com/



http://www.ngksparkplugs.com/

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W108
W116
FJ60

You must be the 3rd guy to tell me the plugs on Fastlane are resistor plugs.

I remember the link that whunter posted with the sale on resistor plugs, but I couldn't find it either.

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Paul S.

2001 E430, Bourdeaux Red, Oyster interior.
79,200 miles.

1973 280SE 4.5, 170,000 miles. 568 Signal Red, Black MB Tex. "The Red Baron".

NGK BP6ES should be fine, and available at your local autozone etc

The NGK web site shows the following V plug as being the proper plug BKR5E for my car. Are we saying that using a resistor plug will work fine as a replacement for the non resistor plug?

There is no doubt that a resistor plug *will* work where a non-resistor plug is called for, however, due to the increased resistance, it won't stay that way for long.

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08 W251 R350
97 W210 E320
91 W124 300E
86 W126 560SEL
85 W126 380SE Silver
85 W126 380SE Cranberry
79 W123 250
78 W123 280E
75 W114 280

This guy on Ebay has them... it looks like the right ones...
http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&item=300108945214

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2009 Mercedes ML320 Bluetec