Parts Catalog Accessories Catalog How To Articles Tech Forums
Call Pelican Parts at 888-280-7799
Shopping Cart Cart | Project List | Order Status | Help




Go Back   PeachParts Mercedes-Benz Forum > Mercedes-Benz Tech Information and Support > Tech Help

Reply
 
LinkBack Thread Tools Display Modes
  #1  
Old 10-16-2004, 02:57 AM
Registered User
 
Join Date: Oct 2004
Posts: 2
1998 S420??????

I have two questions? 1) How do I change the spark plugs on a 1998 S420 MB? 2) Where can I get a technician manual? I like doing the work myself to save money.

Thank You for Your Valuable Time
smitoryous
Reply With Quote
  #2  
Old 10-16-2004, 06:49 AM
KenP's Avatar
Registered User
 
Join Date: Dec 2002
Location: Southern New Hampshire
Posts: 418
Hi. Very easy job. Simply remove the black plastic covers located in the center of the valve covers, remove the individual spark plug coils (8 of them), and change the plugs. Be sure to use some anti-seize on the new plug threads... just a dab, you don't need much.
You'll find many posts here about w140 service manuals. MB will now apparently sell you a CD with basic procedures at the dealers. You can also subscribe to ALLDATA on-line manuals which has more detail. For the most detail, you can buy on-line time with the MB site.
The attached pix shows the plastic covers removed and the plugs coils exposed. This should help you along.
I see this is your first post... you'll learn much about your W140 if you hang around here a bit. Don't hesitate to ask questions... the folks here are terrific and will help you.
Welcome to the best Forum on the web.
Attached Thumbnails
1998 S420??????-coils.jpg  
__________________
KenP

1996 S500 W140 Coupe
Reply With Quote
  #3  
Old 10-16-2004, 12:20 PM
Registered User
 
Join Date: Oct 2004
Posts: 2
1998 S420

Thank You for your help.

Now that thats done. How do you replace the injectors? I pulled the fuel line off and put it back and gas comes out and and won't seal. Are there gaskets or seals that need to be replaced? I believe that they are injectors. Where the fuel line looks like a U shaped around the top part of the engine. I should have never pulled them off. I just need help.

Thanks
Reply With Quote
  #4  
Old 10-16-2004, 12:44 PM
KenP's Avatar
Registered User
 
Join Date: Dec 2002
Location: Southern New Hampshire
Posts: 418
Hi. If you look at the pix I posted earlier, you can see a couple of the fuel injectors just above the valve cover.
The injectors are held between the fuel rail (that "U" shaped tube) and the intake manifold.
The top and bottom each injector has an "O"-ring to seal it and prevent leaks.
You'll have to replace the seals and make sure the mating recesses for the injectors are clean.
Make sure everything is clean when you reassemble.
__________________
KenP

1996 S500 W140 Coupe
Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On




All times are GMT -4. The time now is 06:47 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2018 Pelican Parts, LLC - Posts may be archived for display on the Peach Parts or Pelican Parts Website -    DMCA Registered Agent Contact Page