[W126 Coupe] Opinion on ignition parts & dust cover

[Mister McGoo]

Camran;

I don't know, most likely the W9DC.  IF you have the original Owner's Manual 
it tells you iside the back cover.

My 380SE uses W7D because it is the higher compression European engine.

-Bellamy


>From: "Camran Nassiri" <Camran at ENVIRONMENTCONTROL.COM>
>Reply-To: Mercedes Coupes Mailing Lists <mbcoupes at mbcoupes.com>
>To: "Mercedes Coupes Mailing Lists" <mbcoupes at mbcoupes.com>
>Subject: RE: [W126 Coupe] Opinion on ignition parts & dust cover
>Date: Thu, 15 Sep 2005 10:42:35 -0700
>
>Bellamy- On a 90 560SEC imported for California market, would you use
>W9DC or W7DC?  Just curious.
>Thanks,
>Camran 90 560SEC, 63 220SEb
>
>-----Original Message-----
>From: Mister McGoo [mailto:eelploot at hotmail.com]
>Sent: Thursday, September 15, 2005 10:37 AM
>To: mbcoupes at mbcoupes.com
>Subject: RE: [W126 Coupe] Opinion on ignition parts & dust cover
>
>
>Tom;
>
>Myself, I'd try W9DC's.
>
>I went through this "hotter plug" issue two years ago.  The engine is a
>380
>Euro with 250,000Km.  Then I went back to the recommended original
>(W7DC).
>The theory is fine in a controlled environment, but unless you can
>control
>everything including the quality of the gasoline you pump, the results
>can
>be inconclusive.
>
>In Europe they have designed the N. American engines and systems for our
>
>inconsistant quality, low octane fuel.
>
>For those who are really enthusiastic, it may be fun to experiment with
>plugs; you'll do no damage as long as the physical dimensions are right,
>and
>if you actually believe you are gaining, that's terrific.
>
>For most people it doesn't apply.
>
>-Bellamy
>
>
>
>
> >From: "Tom Oelsner" <toelsner at mindspring.com>
> >Reply-To: Mercedes Coupes Mailing Lists <mbcoupes at mbcoupes.com>
> >To: "Mercedes Coupes Mailing Lists" <mbcoupes at mbcoupes.com>
> >Subject: RE: [W126 Coupe] Opinion on ignition parts & dust cover
> >Date: Thu, 15 Sep 2005 09:49:42 -0700
> >
> >ok Richard.  I looked at the articles.  Now my question remains, what
> >plug should I try that is hotter and what should I gap it to?  I am in
> >Northern California.  Nighttime temps are already down in the low 50s.
>
> >Last week I was in Morro Bay and it was in the upper 40s. Tom
>
>
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