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Old 06-11-2003, 06:54 PM
Registered User
Join Date: Jun 2003
Location: San Francisco, CA
Posts: 14
Newbie question -How to replace the spark plug?

Hi all,
Iím new in this forum. I just picked up a 1999 C-230k and itís has a 63k miles on it. I would like to do some maintenance and replace the all spark plug. If I order this from fast link . Do I need to do any gap adjustment on the spark plug before I replace? I would also like to drain the brake fluid. What is the procedure? Any suggestion will be appreciated.
Thanks in advance..

1999 C230 Kompressor Sport
2002 Toyota Camry
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Old 06-11-2003, 07:06 PM
Registered User
Join Date: Feb 2003
Location: Ontario, Canada
Posts: 3,160
For the brake fluid part, may I suggest a search under " brake fluid flush ".
On the sparkplug issue:
1. If you are getting Bosch F7KTCR, there is no " adjusting" to do.
2. I normally like to change plugs on an aluminum head engine when it's cold.
3. Apply a VERY small amount of anti-seize compound on the plug threads before installing them.
4. Use a little dab of dielectric grease on the plug boots, before you re-connect them.

P.S. Welcome to the forum.
2007 C 230 Sport.
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Old 06-11-2003, 08:09 PM
Registered User
Join Date: Apr 2000
Posts: 236
Antiseez is a good idea. But you will find that changing plugs as early as 63K miles is a waste of time. Most MB plugs will go at least 100K miles before any attention is needed. So why bother?
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Old 06-11-2003, 09:55 PM
Registered User
Join Date: Feb 2003
Location: Ontario, Canada
Posts: 3,160

I think the C 230 K's are a little more demanding when it comes to sparkplugs.
At least mine seems to be, that's why I like to change them at 50 k miles.
2007 C 230 Sport.
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Old 06-12-2003, 09:23 AM
I told you so!
Join Date: Jun 2002
Location: Motor City, MI
Posts: 2,743
Even if the plugs are good, it's a good idea to change them simply because they have a tendency to sieze in the aluminum heads if left too long. You can imagine how expensive that problem is! 60K is chancy - 100K is way too long, not just for the seizing issue, but for performance from ANY plug, including platinum-tipped. 100K for platinum plugs is only an optimistic marketing advertisement - makes for a good round number. They are typically only good to roughly 60-80K.
95 E320 Cabriolet, 131K
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