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 04-02-2004, 07:26 PM
Registered User
 
Join Date: Mar 2000
Posts: 534
M119 Distributor Cap & Rotor

What is the recommended replacement interval for M119 distributor caps and rotors?

Which (if any) ignition system components might fail if the caps and rotors are run for extended periods without change?

Reply With Quote
  #2  
Old 04-02-2004, 08:07 PM
Rafi's Avatar
Registered User
 
Join Date: Jan 2003
Location: Garden State
Posts: 474
I am not aware of any spec, I am going by my experience. I would say 60K mi. Possible symptoms of bad ignition train (coil, distributer, rotor, plug wire, plug) would be misfire and poor operation.
__________________
2010 ML350 Bluetec
2012 Mustang Convertible
Reply With Quote
  #3  
Old 04-04-2004, 09:08 AM
jc300e's Avatar
Registered User
 
Join Date: May 2000
Location: Location: Norcross, GA
Posts: 124
M119 is hard on the caps and rotors... My tech advised 60 - 75K replacement of these parts. It's a reasonably easy DIY task. I think the web site here actually has the procedure on the DIY page. Rough idle and hesitation spells are what I experienced prior to changing out caps and rotors.
__________________
Jeff
'87 300E
'92 400E
'06 ML350
Reply With Quote
  #4  
Old 04-05-2004, 06:23 AM
gerryvz's Avatar
"Unhinged Troll" - Jim B.
 
Join Date: Dec 2001
Location: The Woodlands, TX
Posts: 1,268
I recently replaced them on my 1994 E500 at 75K miles and they were in SORRY shape. I'd recommend 50K. The M119 is notoriously hard on the cap and rotor.

Cheers,
Gerry
Reply With Quote
  #5  
Old 06-15-2004, 04:06 PM
gsxr's Avatar
Unbanned...?
 
Join Date: Aug 2001
Location: USA
Posts: 8,018
Gerry, did you notice any power gains with the new cap/rotor? Mine don't look good - significant corrosion of the cap contacts, lots of green powder. The rotors weren't great but cleaned up ok with sandpaper. I don't have a rough idle or misfire, and top-end power seems OK, but my low-end power may be weak judging by my pathetic 60-foot times. I'd just hate to spend $200 for aftermarket parts ($400 for OE dealer parts!) and have ZERO change in performance...!

Reply With Quote
  #6  
Old 06-20-2004, 02:13 AM
zeronero's Avatar
Registered User
 
Join Date: May 2003
Location: San Francisco Bay Area
Posts: 426
When I changed mine I noticed no change in performance at all and my car had 120K miles on it.
__________________
1992 Mercedes-Benz 400E
2002 Mercedes-Benz ML500
Reply With Quote
  #7  
Old 06-20-2004, 10:59 AM
Moderator
 
Join Date: Mar 2000
Location: Gainesville FL
Posts: 6,844
It is a common domestic ritual to replace cap,rotor, and plug wires with that uniquely American term a "Tune-up".

Such maintenance is probably valuable with the POS equipment used on domestic iron. MB stuff has no predicted lifespan and I never change such parts as some routine maintenance. Properly tooled technicians can evaluate the components during normal servicing and make specific recommendations.

Defective caps and rotors can cause misfires, hard starting, and in some instances hesitations. A new cap will do nothing to performance unless it is in specific failure.

For those not properly equipted to evaluate the system and who never visit someone who is, they will have to base their maintenance concept on how many wasted dollars they will throw at poor running cars. The look of the inside of a distributor cap and rotor will scare most amateurs, but has very little to do with their capability.
__________________
Steve Brotherton
Continental Imports
Gainesville FL
Bosch Master, ASE Master, L1
33 years MB technician
Reply With Quote
  #8  
Old 06-20-2004, 01:22 PM
aldedmon's Avatar
Senior Member
 
Join Date: Mar 2001
Location: Houston
Posts: 810
So tell me this

Hey Steve,
Got a question for you...
Its 88 deg. here in Texas and I'm crusing the 500E North bound on I45 on a 250 mile 3.5 trip from Houston up to Big D.
I'm stretching the legs out on the ol girl pretty good as the smokey's have apparently taken the morning off. At about the 150 mile mark, I start feeling some intermitent hesitation. Not really hesitation but you know how on a Domestic car, the engine loads up when the AC compressor kicks, well it kinda felt like that only of course I was at 80+ Mph. I was thinking TBA might be headed sout since I'm at ~78K mi. Any way to manually check it. I seem to remember getting similiar hesitation when my TBA went south in 400E.

PS Happy Father's day to ya
__________________
Regards,

Albert
aldedmon@yahoo.com
Reply With Quote
  #9  
Old 06-20-2004, 02:19 PM
Moderator
 
Join Date: Mar 2000
Location: Gainesville FL
Posts: 6,844
Misfire at ultimate load is a posibility for a cap an rotor but so is fuel starvation and plug wires.

If its got a 100k and a hard to diagnose problem such as yours the maintenance concept gains value.
__________________
Steve Brotherton
Continental Imports
Gainesville FL
Bosch Master, ASE Master, L1
33 years MB technician
Reply With Quote
  #10  
Old 06-20-2004, 06:59 PM
aldedmon's Avatar
Senior Member
 
Join Date: Mar 2001
Location: Houston
Posts: 810
Wiring harness

Any thoughts on the dreaded wiring harness. I can find no confirmation that it has beed changed

__________________
Regards,

Albert
aldedmon@yahoo.com
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 04:37 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