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

LinkBack Thread Tools Display Modes
Old 11-06-2004, 04:31 PM
Registered User
Join Date: Nov 2004
Posts: 2
Ml 320 Spark Plugs

Trying to change the plugs on my 1999 ml320 and having some difficulty. I'm using a long bar plug spanner but am having to exert quite unusual force to free the plug and I don't want to break something. I wondered if somehow the conventional spanner is jamming. Is there a special plug spanner required or will I just have to force the issue? Any constructive help appreciated . . .
Reply With Quote
Old 11-06-2004, 04:43 PM
Posts: n/a
boot puller

if they are tight just turn them slowly they will free up, use a short as extension as you can get in there as close as possible.
here is a link to the tool for the boots. it is actually a bent 17mm wrench. if you order the tool from mercedes they will send you a valve adjusting wrench from the old m110 motors which is mercedes part number 110-589-01-01-00. i have it and use it everytime i do the plugs on a 112 engine works great. the tool for the plugs is 112-589-01-09-00 it looks like a conventional wobble socket plug. what plugs are you using? if you have mor questions or need more info email me. i also have the service sheet for the ML's i can send it too you, too bid to post here

plug boot tool
Reply With Quote
Old 11-06-2004, 11:38 PM
Southern's Avatar
Registered User
Join Date: Jan 2000
Location: Carol Stream, Il, USA
Posts: 605
If your plugs are original then they will be difficult to get out. The plugs are good for 4 years or 100,000 miles (which ever comes first).

Like Carson356 suggested, use a short extension and turn them slowly (ease them out). Take your time doing this or you may end up with broken plugs - also make sure the engine is at room temperature (not warm or hot).

I prefer to use dielectric grease inside the boots and high temp anti-seize compound on the threads - it makes removing the plugs easier the next time they need to be changed.
1998 Mercedes E320, 200K Miles
2001 Acura 3.2TL, 178K Miles
1992 Chevy Astro, 205K Miles
Reply With Quote
Old 11-12-2004, 02:46 AM
Registered User
Join Date: Nov 2004
Posts: 2
Thanks for taking the time and trouble to post your helpful advise. Other chores have kept me from tackling the job but I'll get round to it in due course.
Reply With Quote


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 01:19 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