Cylinder misfires need help - Mercedes-Benz Forum
LinkBack Thread Tools Display Modes
#1 (permalink) Old 11-23-2010, 08:04 PM
BenzWorld Junior Member
Date registered: Oct 2010
Vehicle: 2001 e320 4matic, 2005 c230k
Location: Minnesota
Posts: 30
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
(Thread Starter)
Cylinder misfires need help

I have a 2001 e320 4matic with 103,000 miles. I have violent shaking and a gas smell at idle. I parked it and returned the next day to start it up and got all cylinder misfires from bank 2. I replaced plugs and wires in Decemeber 05 about 45,000 miles ago and a new battery in sept.2007. The codes are as follows.....
Pending codes
P0300 Multiple/Random Misfire Detected
P0300 Multiple/Random Misfired Detected
P0304 Misfire detected in cylinder 4
P0304 Misfire detected in cylinder 4
P0306 Cylinder 6 misfire detected
P0306 Cylinder 6 misfire detected
P0150 Oxygen sensor fault, Left side, Post Catalyst
P0305 Misfire detected in cylinder 5

Parameter Description Value
DTC for which Freeze Frame was Stored P0300
Fuel System 1 Status Closed Loop
Fuel System 2 Status Closed Loop
Calculated LOAD Value 41.96 %
Engine Coolant Temp 174.20 °F
Short Term Fuel Trim - Bank 1 0.00 %
Long Term Fuel Trim - Bank 1 7.81 %
Short Term Fuel Trim - Bank 2 -14.06 %
Long Term Fuel Trim - Bank 2 8.59 %
Intake Manifold Absolute Pressure 19.84 inHg
Engine RPM 1,975.00 rpm
Vehicle Speed Sensor 56.54 mph

It seems as though the short term fuel trim is running rich, if anyone can chime in on what that might mean that would be a huge help. Although any suggestions would be appreciated. I would have to tow the car to a dealership if I cant find a d.i.y solution.

Last edited by brau0318; 11-26-2010 at 12:28 PM.
brau0318 is offline  
Sponsored Links
#2 (permalink) Old 11-23-2010, 08:23 PM
BenzWorld Veteran
j99xj's Avatar
Date registered: Apr 2009
Vehicle: 1999 E320 4matic (owned previously); 1996 SL500
Location: Colorado
Posts: 674
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Did you by chance drive the car fast through a puddle of water? If so you may have water in your spark plug holes causing havoc.

"Elitist snobs talking about elitist snobs on an elitist circlejerk forum... " -Fergie

"And you may find yourself behind the wheel of a large automobile" -Once In a Lifetime, Talking Heads

"...and now you know...the rest of the story." -Paul Harvey
j99xj is offline  
#3 (permalink) Old 11-23-2010, 08:48 PM
BenzWorld Elite
mbvis's Avatar
Date registered: Jan 2010
Vehicle: 99 E430, 01 E430 Sport, 00 SL500
Location: LA, CA
Posts: 3,269
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
At 100K+ miles, eliminate O2 sensor problem by swapping left sensor to right, right to left to see if bank 1 becomes the trouble. There are 2 pairs, front and rear. Use a special $10 socket to remove the sensor. Don't forget to apply some anti-seize ($1 a pack) if the replacement is permanent.
mbvis is offline  
#4 (permalink) Old 12-16-2010, 03:04 PM
BenzWorld Junior Member
Date registered: Oct 2010
Vehicle: 2001 e320 4matic, 2005 c230k
Location: Minnesota
Posts: 30
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
(Thread Starter)
The culprit was a bad injector, cylinder 5. Found fuel in my oil, and it was all over bank 2 but mostly in cylinder 5. Thanks to all that give there help
brau0318 is offline  
#5 (permalink) Old 12-16-2010, 03:10 PM
Lifetime Premium Member
Musikmann's Avatar
Date registered: May 2006
Vehicle: 2001 E320 - Brilliant Silver/Ash: 104,000+
Location: West Virginia, USA
Posts: 17,193
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Lifetime Premium Member
Glad you fixed it and thanks for the follow up info.

Mercedes Benz - Das beste oder nichts!
Musikmann is offline  

  Mercedes-Benz Forum > Mercedes-Benz Sedan Forums > W210 E-Class

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:
If you do not want to register, fill this field only and the name will be used as user name for your post.
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)
User Tag List

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
Misfires....... cornwallman R170 SLK Class 5 03-30-2010 03:52 PM
Misfires... bereng R/C107 SL/SLC Class 2 04-26-2009 09:51 PM
P0300: Misfires gm_bigj W220 S-Class 10 01-30-2009 06:35 AM
Misfires Help! spainhour5 W210 E-Class 9 07-03-2008 10:33 AM
Engine Misfires opbigdave AMG W210 E50 , AMG E55 3 05-04-2007 06:08 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