E-Class (W211) 2003-2009

Shaking from car at idle

Thread Tools
 
Search this Thread
 
Rate Thread
 
Old 05-17-2007, 03:29 PM
  #1  
Almost a Member!
Thread Starter
 
eurocarnut's Avatar
 
Join Date: May 2007
Posts: 31
Likes: 0
Received 0 Likes on 0 Posts
Shaking from car at idle

Hi all... I have a 2004 E500 and am having a slight problem:

Here are the facts:

92k miles
No warranty
No loss of power
When it comes to a stop, the car sounds and feels as though it is misfiringabout every 15-20 seconds.
This is ONLY at idle, the car is smooth through the powerband all the way up to redline.

Any suggestions, and I don't want to take it to the dealer.

OBD II not reporting any codes.
Old 05-17-2007, 03:47 PM
  #2  
MBWorld Fanatic!
 
harkgar's Avatar
 
Join Date: Apr 2006
Location: Toronto
Posts: 1,332
Likes: 0
Received 4 Likes on 4 Posts
2006 E320 CDi, 2008 3/4 Ton Suburban, 2007 "rice rickshaw" Accord 5 speed
common things are common

Originally Posted by eurocarnut
Hi all... I have a 2004 E500 and am having a slight problem:

Here are the facts:

92k miles
No warranty
No loss of power
When it comes to a stop, the car sounds and feels as though it is misfiringabout every 15-20 seconds.
This is ONLY at idle, the car is smooth through the powerband all the way up to redline.

Any suggestions, and I don't want to take it to the dealer.

OBD II not reporting any codes.
When did you last change your spark plugs?
What grade of gasoline do you pump? 91 octane minimum is needed.
Old 05-17-2007, 06:32 PM
  #3  
MBWorld Fanatic!
 
AndrewAZ's Avatar
 
Join Date: Apr 2006
Location: Arizona
Posts: 2,767
Likes: 0
Received 0 Likes on 0 Posts
BMW FTW
Change your plugs, and if that does not fix it check your engine mounts. Mercedes seems to use low quality mounts my last mercedes I had 45k miles on it and needed them replaced and they also replaced the transmission mounts and the car was as smooth as butter again.
Old 05-17-2007, 10:09 PM
  #4  
Senior Member
 
hecdog's Avatar
 
Join Date: Aug 2004
Location: Oakland, CA
Posts: 426
Received 40 Likes on 24 Posts
2014 E350 Estate Wagon 4Matic
Could also be your EGR valve. My E320 did the same thing at idle. It was replaced under warranty.
Old 05-17-2007, 10:18 PM
  #5  
MBWorld Fanatic!
 
ProV1's Avatar
 
Join Date: Jan 2004
Location: Baltimore MD
Posts: 1,461
Likes: 0
Received 1 Like on 1 Post
MB, BMW
no CEL on, could be MAF
Old 05-18-2007, 03:06 AM
  #6  
Almost a Member!
Thread Starter
 
eurocarnut's Avatar
 
Join Date: May 2007
Posts: 31
Likes: 0
Received 0 Likes on 0 Posts
Going to change mass airflow sensor and the egr valve and will report back in about a week or so.

Thanks again for all the replies!
Old 05-20-2007, 02:57 PM
  #7  
Super Member
 
csumt76's Avatar
 
Join Date: May 2004
Location: USA
Posts: 755
Likes: 0
Received 2 Likes on 2 Posts
LS7 powered Corvette
92K... I would bet money you could use a set of spark plugs and a few plug wires. With the SDS, you could pin point which cylinder is running irregularly to determine which cables you might need to replace.

I wouldn't waste my time with the airmass. Engine mounts are more likely to be worn out with that kind of mileage.
Old 05-20-2007, 05:41 PM
  #8  
MBWorld Fanatic!
 
Untertürkheim's Avatar
 
Join Date: Mar 2007
Posts: 2,408
Likes: 0
Received 0 Likes on 0 Posts
Do you know any of the service history on the car? Fuel filter/air filter replacement. Spark plugs, oil service?
Old 05-20-2007, 08:47 PM
  #9  
Almost a Member!
Thread Starter
 
eurocarnut's Avatar
 
Join Date: May 2007
Posts: 31
Likes: 0
Received 0 Likes on 0 Posts
all services have been done as per mb spec. my project this week is to replace:

1. motor mounts
2. tranny mounts
3. MAF
4. EGR valve

The car is due for all these anyway as preventative. i dont want to wait for hem to go out. i may do the fuel pump to for the hell of it.

I changed out the plugs when i first noticed this as i suspected that was the problem. i always pump 91 octane in the car.
Old 06-02-2007, 10:27 AM
  #10  
Almost a Member!
Thread Starter
 
eurocarnut's Avatar
 
Join Date: May 2007
Posts: 31
Likes: 0
Received 0 Likes on 0 Posts
Changed MAF sensor yesterday, no benefit. It's not any of the mounts bc I can hear it misfiring from the exhaust so it has to be something in the motor itself.
Old 06-02-2007, 04:35 PM
  #11  
Senior Member
 
georgedaman's Avatar
 
Join Date: Jun 2006
Location: Toronto Ont Canada
Posts: 375
Received 0 Likes on 0 Posts
GL350
Originally Posted by eurocarnut
all services have been done as per mb spec. my project this week is to replace:

1. motor mounts
2. tranny mounts
3. MAF
4. EGR valve

The car is due for all these anyway as preventative. i dont want to wait for hem to go out. i may do the fuel pump to for the hell of it.

I changed out the plugs when i first noticed this as i suspected that was the problem. i always pump 91 octane in the car.
The mounts should be under warranty 5 years or 120K atleast around here..
Old 06-02-2007, 05:34 PM
  #12  
Out Of Control!!
 
konigstiger's Avatar
 
Join Date: Jul 2003
Location: North Scottsdale, AZ
Posts: 15,903
Received 4,417 Likes on 3,146 Posts
'71 Pinto
Originally Posted by eurocarnut
Changed MAF sensor yesterday, no benefit. It's not any of the mounts bc I can hear it misfiring from the exhaust so it has to be something in the motor itself.
The EGR valve may be binding exceeding the set point. You do not say if you replaced it yet or if the problem persists after changing it. Also, look into a software update for the engine control unit (ECU).
Old 06-19-2007, 01:48 AM
  #13  
Almost a Member!
Thread Starter
 
eurocarnut's Avatar
 
Join Date: May 2007
Posts: 31
Likes: 0
Received 0 Likes on 0 Posts
Update: My mechanic called me this evening and told me that an igniter was fried.

He doesn't speak very good English but I am hoping that whatever he does it will be fixed once and for all!

Will update you when I get the car back.
Old 06-19-2007, 01:25 PM
  #14  
Member
 
Darknessph's Avatar
 
Join Date: Aug 2006
Location: Canada
Posts: 82
Likes: 0
Received 0 Likes on 0 Posts
Really? Please let us know how it changed!

Could you also post the part number for it?

THank you!!
Old 06-20-2007, 12:42 AM
  #15  
Super Member
 
csumt76's Avatar
 
Join Date: May 2004
Location: USA
Posts: 755
Likes: 0
Received 2 Likes on 2 Posts
LS7 powered Corvette
Originally Posted by eurocarnut
Changed MAF sensor yesterday, no benefit. It's not any of the mounts bc I can hear it misfiring from the exhaust so it has to be something in the motor itself.
Good thing you didn't take that bet!
Old 06-23-2007, 05:19 PM
  #16  
Almost a Member!
Thread Starter
 
eurocarnut's Avatar
 
Join Date: May 2007
Posts: 31
Likes: 0
Received 0 Likes on 0 Posts
DONE AND DONE! Just got my car back from the shop yesterday! All the problems are gone! He said that there was a misfire from the igniter in Cylinder 1.

The best news, he only charged me $250 to fix it!

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 


You have already rated this thread Rating: Thread Rating: 0 votes,  average.

Quick Reply: Shaking from car at idle



All times are GMT -4. The time now is 11:20 PM.