Changing spark plug wires: E320 - Mercedes-Benz Forum

 
LinkBack Thread Tools Display Modes
post #1 of 6 (permalink) Old 01-19-2010, 08:36 PM Thread Starter
BenzWorld Newbie
 
Date registered: Jan 2010
Posts: 1
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
(Thread Starter)
Changing spark plug wires: E320

How hard is it to change the spark plug wires on a 2002 E320 4matic? I'm thinking of doing it myself. Dealer told me I have cylinders misfiring due to bad wires. They want to change all the wires (12) and also change the spark plugs (12). Car has 70,000 miles. I'm going to wait til 100,000 miles for the plugs but will change out the wires. Any help on how to do it. Seems like it should be very simple.

Thanks!
ScarletDog is offline  
Sponsored Links
Advertisement
 
post #2 of 6 (permalink) Old 01-20-2010, 05:33 AM
BenzWorld Elite
 
Michael Pillay's Avatar
 
Date registered: Oct 2003
Vehicle: 500SE AMG, E350 4matic, GL 450
Location: Michigan
Posts: 5,282
Mentioned: 0 Post(s)
Quoted: 80 Post(s)
I believe that is a M112 engine and the same as in my 2002 ML320. If I am not wrong, someone will correct me, I am sure! But if this is the case, changing the wires is simple. You might want to consider changing the plugs since you will be in the middle of it anyway. I would also do a search of the w210 forum so see if someone has already done a write up on how to do it.

If you intend to change the wires, a 17 mm open end wrench comes in handy to pop the boot of the plug. Other than that it is pretty straight forward. AutohausAZ should have the wires.

Mike
Michael Pillay is online now  
post #3 of 6 (permalink) Old 01-20-2010, 05:50 AM
Outstanding Contributor
 
eric242340's Avatar
 
Date registered: May 2007
Vehicle: Zotye Auto 1.5T T600 2016
Location: The wild west of the Far East
Posts: 52,171
Mentioned: 3 Post(s)
Quoted: 291 Post(s)
^^Correct thus far. I would strongly recommend changing the plugs at the same time because the bad HT cables will have caused uneven burn and hence damage to the plugs.

New cables + old plugs could mean more misfires and possible damage to new cables as a result. The dealers were trying to cover themselves against this possibility but it is now up to the OP.

ERIC.

___________________________________________
"I am enclosing two tickets to the first night of my new play; bring a friend, if you have one."
- George Bernard Shaw to Winston Churchill.

"Cannot possibly attend first night, will attend second ... if there is one."
- Winston Churchill, in response.
eric242340 is offline  
post #4 of 6 (permalink) Old 01-20-2010, 12:12 PM
BenzWorld Elite
 
Date registered: May 2005
Vehicle: '07 GL320CDI
Location: Albuquerque
Posts: 5,070
Mentioned: 0 Post(s)
Quoted: 1 Post(s)
The "official" Mercedes procedure is to change wires individually as required.

The wires are about $35 each at a dealer, so 12 X 35 = $420.

This is not a POS 'merikun car where every service is a "why don't we do this?" scam.

OE wires are pryed off the plugs using a 17mm wrench, i.e. they don't just pull off.

Kent Christensen
Albuquerque
'07 GL320CDI

Last edited by lkchris; 01-20-2010 at 12:14 PM.
lkchris is offline  
post #5 of 6 (permalink) Old 01-22-2010, 09:41 PM
BenzWorld Elite
 
Date registered: Jan 2004
Vehicle: 1959 220S cabriolet, 1983 240D original owner, 1999 E300 turbo diesel, 1988 560SL, 2003 SLK320
Location: Ocean Isle Beach, NC
Posts: 3,467
Mentioned: 0 Post(s)
Quoted: 30 Post(s)
I think the plug service is 100,000 miles OR five years, so you are due. I'd only change the plugs (use the correct plug) and see what that does. Wires last a long time usually.

Len
'59 220S Cabriolet - for sale - http://www.mbzponton.org/mbz220s/sellswap/car4sale.htm
'83 240D original owner 351,500 miles - for sale - http://www.benzworld.org/forums/w123...g-my-240d.html
'88 560SL 41,000 miles being parted out - https://sites.google.com/site/mercedesstuff/home
'99 E300 turbo 196,000 miles
'03 SLK320 34,500 miles
'14 Smart electric
sokoloff is offline  
post #6 of 6 (permalink) Old 01-22-2010, 09:44 PM
Outstanding Contributor
 
eric242340's Avatar
 
Date registered: May 2007
Vehicle: Zotye Auto 1.5T T600 2016
Location: The wild west of the Far East
Posts: 52,171
Mentioned: 3 Post(s)
Quoted: 291 Post(s)
Quote:
Originally Posted by sokoloff View Post
I think the plug service is 100,000 miles OR five years, so you are due. I'd only change the plugs (use the correct plug) and see what that does. Wires last a long time usually.
On these engines, the wires are not a common problem but when they go wrong it is normally more than one that goes.

ERIC.

___________________________________________
"I am enclosing two tickets to the first night of my new play; bring a friend, if you have one."
- George Bernard Shaw to Winston Churchill.

"Cannot possibly attend first night, will attend second ... if there is one."
- Winston Churchill, in response.
eric242340 is offline  
Sponsored Links
Advertisement
 
Reply

  Mercedes-Benz Forum > General Mercedes-Benz Forums > General Mercedes-Benz

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Mercedes-Benz Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in











  • Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
     
    Thread Tools
    Show Printable Version Show Printable Version
    Email this Page Email this Page
    Display Modes
    Linear Mode Linear Mode



    Similar Threads
    Topic Author Forum Replies Last Post
    Spark Plug Wires mercedesmonk W202 C-Class 11 03-11-2011 08:15 PM
    Spark plug wires JAD W163 M-Class 10 04-07-2008 11:49 PM
    Spark plug wires / Ignition Wires DETANE W163 M-Class 11 04-24-2007 06:29 AM
    Changing Spark Plug Wires..... orlandotrader W163 M-Class 0 11-10-2005 07:14 AM
    Spark plug wires.. How much? orlandotrader W163 M-Class 5 10-13-2005 01:52 PM

    Posting Rules  
    You may post new threads
    You may 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 Off
    Trackbacks are On
    Pingbacks are On
    Refbacks are On

     

    Title goes here

    close
    video goes here
    description goes here. Read Full Story
    For the best viewing experience please update your browser to Google Chrome