ML350 Smokes (Sometimes) - Mercedes-Benz Forum

LinkBack Thread Tools Display Modes
post #1 of 2 (permalink) Old 03-06-2012, 07:25 AM Thread Starter
BenzWorld Newbie
Date registered: Jan 2012
Vehicle: '08 ML350, 99 ML320
Location: Keswick, Ontario
Posts: 4
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
(Thread Starter)
ML350 Smokes (Sometimes)

I have an ’08 ML350 that has a badly worn engine due to lack of oil changes by the previous owner.

During normal driving around town and short runs on the highway it does not use any oil and there is no smoke from the exhaust.

During extended highway driving at steady speeds (60-70 MPH) for more than 10 minutes, oil seems build up somewhere in the engine. Sudden acceleration will produce a huge cloud of smoke from the exhaust. The longer the run at steady speeds, the bigger the cloud of smoke. Additionally, following a very long run, acceleration will cause the engine to misfire and the computer will shut down that cylinder necessitating the engine to be restarted to restore the cylinder.

This only happens following runs at steady speeds.

On a recent trip of 400 miles I used 3 quarts of oil.

Where in the engine, could oil be building up and getting into the combustion chambers during acceleration? Is it possible that it is being drawn into the engine by a defective emission control device?

Wouldn’t worn valve guides cause smoke at start up?

HELP. Nobody that I have consulted including my local MB dealer has been able to explain this.
Donldm is offline  
Sponsored Links
post #2 of 2 (permalink) Old 03-06-2012, 10:32 AM
BenzWorld Elite
mbvis's Avatar
Date registered: Jan 2010
Vehicle: 99 E430, 01 E430 Sport, 00 SL500
Location: LA, CA
Posts: 3,266
Mentioned: 0 Post(s)
Quoted: 2 Post(s)
>>badly worn engine due to lack of oil changes
>>3 quarts of oil per 400 miles
Through the worn piston rings, engine oil escapes into the cylinders to be burned to cause smoke. In rebuilt engine, the rings are often replaced.
What are the signs of bad piston rings - The Q&A wiki
Additionally, the performance will fall off as compression is lost past the worn rings. There... What are signs of a bad piston. Excessive smoke from the exhaust, and an
mbvis is offline  
Sponsored Links

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

Quick Reply

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


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

Email Address:


Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.

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
Different smokes afterdavid W123 E,CE,D,CD,TD,TE Class 8 05-18-2011 03:50 PM
81' 380 se SMOKES! HELP! idlew1llkill W126 S,SE,SEC,SEL,SD,SDL Class 6 02-20-2011 02:00 PM
Electronic Smokes MBLR Off-Topic 3 08-04-2009 10:18 PM
560 SEL Smokes vpannu W126 S,SE,SEC,SEL,SD,SDL Class 5 02-16-2006 08:04 AM
HOLY SMOKES... AAC W163 M-Class 5 11-19-2005 12:32 AM

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

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