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  #1  
Old 06-26-2006, 11:45 AM
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1988 300TE Spark Plugs

Hi guys,

For my 1988 300TE Wagon i want to change the spark plugs on it. Now, which ones do you recommend for California standards?

Thanks, ps2cho

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  #2  
Old 06-26-2006, 03:26 PM
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Check the Owner's Manual, or call your local MB dealer.
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Old 06-26-2006, 07:31 PM
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Or look it up at: http://www.boschautoparts.com/VehiclePartFinder when they are back online.
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Old 06-27-2006, 10:42 AM
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My son posted this, I was busy...
We dont have an owners manual... the site is still down... and the shop at this site lists two types.
Anyone want to tell us what works?
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Old 06-27-2006, 10:58 AM
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88 300-TE uses a Bosch plug number -> H9DC or H9DC0. Either will work fine. The H9DCO has a slightly wider side electrode, but in my experience, the H9DC seems to idle smother.

In another recent thread here, some of us learned that Bosch no longer makes these plugs. I suspect there's still a surplus available at the various WEB seller sites like the one here or at a local euro retailer in your area. Once that supply dries up, your options are Beru plugs which are available at:

http://www.kingsborne.com

or Asian brands like NGK or Denso.

Here's a photo of the H9DCs from this sites BuyParts facility:

http://catalog.eautopartscatalog.com/mercedesshop/sophio/wizard.jsp?partner=mercedesshop&clientid=catalog.mercedesshop&baseurl=http://catalog.peachparts.com/&cookieid=1U40N9POF1U40N9W6S&year=1988&make=MB&model=300-TE-001&category=F&part=Spark+Plug

The Bosch replacement for the H9DC is a resistor plug. Unfortunately the H9DC and H9DCO are non-resistor. I'm not sure what Bosch was thinking about when they did this?

Here's a pointer to the H9DC discussion that went on awhile back:

H9DC and H9DCO spark plugs Discontinued
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Last edited by Mike Murrell; 06-27-2006 at 11:06 AM.
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Old 06-28-2006, 12:17 AM
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Great info Mike.
Thats what I needed.
Thankyou!

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