MBWorld.org Forums

S-Class (W220) 1999-2006: S 320 CDI, S 320, S430, S 500, S 600

w220 m112 shaking engine

     
Old Feb 20, 2023 | 08:19 AM
Share
  #1  
khalidabdu's Avatar
khalidabdu
Thread Starter
Newbie
 
Joined: Feb 2022
Posts: 5
Likes: 0
s280 w220 m112 v6
w220 m112 shaking engine
hello everybody ,

i have w220 s280 v6 2005 160,000 mileage .. the engine is shaking at idle but i have notice that when the secondary air injection works the engine becomes very stable and no shaking , but when it turns off the engine starts shaking again .. what do you think is the problem .. is it vaccuam leak or engine mounts or something else ??
Reply
0
Old Feb 20, 2023 | 10:59 AM
Share
  #2  
Fried Chicken's Avatar
Fried Chicken
Super Member
15 Year Member
Liked
Loved
Community Favorite
 
Joined: Dec 2007
Posts: 980
Likes: 224
2005 S500 Designo
What happens when the engine gets warm?
Reply
0
Old Feb 20, 2023 | 02:56 PM
Share
  #3  
khalidabdu's Avatar
khalidabdu
Thread Starter
Newbie
 
Joined: Feb 2022
Posts: 5
Likes: 0
s280 w220 m112 v6
Originally Posted by Fried Chicken
What happens when the engine gets warm?
the shake becomes less when the engine gets warm but doesn't disappear completely.
Reply
0
Old Feb 22, 2023 | 05:23 AM
Share
  #4  
tim687's Avatar
tim687
Super Member
Photogenic
Liked
Loved
Community Favorite
 
Joined: May 2021
Posts: 554
Likes: 150
From: Netherlands
CL 600 '00 5.8L V12
It sounds like there is too little oxygen in the exhaust, which causes the ECU to lean out the mixture. What happens when you disconnect your O2 sensors?
Reply
0
Old Feb 22, 2023 | 06:33 PM
Share
  #5  
Fried Chicken's Avatar
Fried Chicken
Super Member
15 Year Member
Liked
Loved
Community Favorite
 
Joined: Dec 2007
Posts: 980
Likes: 224
2005 S500 Designo
If spark plugs and coils haven't been replaced, now might be a good time to do them.
Reply
0
Old Feb 24, 2023 | 12:54 PM
Share
  #6  
khalidabdu's Avatar
khalidabdu
Thread Starter
Newbie
 
Joined: Feb 2022
Posts: 5
Likes: 0
s280 w220 m112 v6
Originally Posted by tim687
It sounds like there is too little oxygen in the exhaust, which causes the ECU to lean out the mixture. What happens when you disconnect your O2 sensors?
haven't tried it yet . by the way i hear hissing sound coming from the side of bank 2 of the engine .

Originally Posted by Fried Chicken
If spark plugs and coils haven't been replaced, now might be a good time to do them.
actually i have change all sparks recently and i noticed that the tips of the sparks of the cylinder 5 were black not like the others .. !! by the way that cylinder was giving me misfire when the rpm hits 5 or 6.
Reply
0
Old Feb 24, 2023 | 08:08 PM
Share
  #7  
wallyp's Avatar
wallyp
MBWorld Fanatic!
10 Year Member
Liked
 
Joined: Dec 2012
Posts: 2,473
Likes: 439
From: Ball Ground, GA (N of Atlanta)
2003 S500 2007 GL450
Use a 1.5m rubber or plastic 10mm tube stuck in your best ear as a locating device to find where the vacuum leak is located.
Reply
0

Trending Topics

Old Feb 25, 2023 | 01:24 PM
Share
  #8  
khalidabdu's Avatar
khalidabdu
Thread Starter
Newbie
 
Joined: Feb 2022
Posts: 5
Likes: 0
s280 w220 m112 v6
Originally Posted by wallyp
Use a 1.5m rubber or plastic 10mm tube stuck in your best ear as a locating device to find where the vacuum leak is located.
actually i can't decide if the hissing sound comes from the valve cover or exhaust or the steering pump .. cuz they are all close to each other !! i'll try your idea and use the tube
Reply
0
MB World Stories

The Best of Mercedes & AMG

story-0

6 Mercedes Models That Did NOT Age Well (But Are Somehow Still Cool)

 Verdad Gallardo
story-1

Manual Mercedes? 6 Times Sindelfingen Let Drivers Have All The Fun

 Verdad Gallardo
story-2

Mercedes SLR McLaren 722 S Is Extremely Rare Example Modified by McLaren

 Verdad Gallardo
story-3

8 Classic Boxy Mercedes Designs That Have Aged Like Fine Wine

 Verdad Gallardo
story-4

Flawlessly Restored Mercedes 190E Evo II Heads to Auction

 Verdad Gallardo
story-5

Electric Mercedes C-Class Unveiled: 11 Things You Need to Know

 Verdad Gallardo
story-6

Mercedes EQS Gets A Major Update: Everything You Need to Know

 Verdad Gallardo
story-7

5 Underrated Mercedes-Benz Models That Don't Get the Love They Deserve

 Verdad Gallardo
story-8

Mercedes 300D Has Pushed Well Past 1 Million Miles and It Ain't Stopping

 Verdad Gallardo
story-9

10 Most Reliable Mercedes-Benz Models You Can Buy Used

 Verdad Gallardo
Old May 14, 2023 | 07:39 PM
Share
  #9  
alex6455's Avatar
alex6455
Junior Member
 
Joined: Jan 2014
Posts: 40
Likes: 1
From: Denver, CO and Palm Beach, FL
2005 S600, 2017 Gran Turismo, 2016 LR4
I always think engine mounts (for no logical reason), but that doesn't give us any insight as to why the engine runs smoother with the secondary air injection on. Do you have any clue as to the last time the mounts were replaced?
Last edited by alex6455; May 14, 2023 at 08:08 PM. Reason: added content
Reply
0
Old May 14, 2023 | 11:48 PM
Share
  #10  
Fried Chicken's Avatar
Fried Chicken
Super Member
15 Year Member
Liked
Loved
Community Favorite
 
Joined: Dec 2007
Posts: 980
Likes: 224
2005 S500 Designo
The secondary air pump is a good indicator of issues. Explore O2 sensors, MAF, maybe intake manifold flap issues (I believe it plagues these engines).
Reply
0
Back to Subforum
S-Class (W220)
View Next Unread
Fan control module W220 2003

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

Thread Tools
Search this Thread
Search this Thread:

Advanced Search
Rate This Thread
Rate This Thread:
You have already rated this thread Rating: Thread Rating: 0 votes, average.
Show Printable Version
Email this Page

Advanced Search

All times are GMT -4. The time now is 10:59 AM.

story-0
6 Mercedes Models That Did NOT Age Well (But Are Somehow Still Cool)

Slideshow: Not every Mercedes design becomes timeless, some feel stuck in the era they came from.

By Verdad Gallardo | 2026-05-12 18:09:07


VIEW MORE
story-1
Manual Mercedes? 6 Times Sindelfingen Let Drivers Have All The Fun

Slideshow: Yes, Mercedes built manual cars, and some of them are far more interesting than you'd expect.

By Verdad Gallardo | 2026-05-02 12:36:58


VIEW MORE
story-2
Mercedes SLR McLaren 722 S Is Extremely Rare Example Modified by McLaren

Slideshow: A one-of-one U.S.-spec Mercedes-Benz SLR McLaren Roadster became even rarer after a factory-backed transformation at McLaren's headquarters.

By Verdad Gallardo | 2026-04-29 11:19:28


VIEW MORE
story-3
8 Classic Boxy Mercedes Designs That Have Aged Like Fine Wine

Slideshow: Before curves took over, Mercedes mastered the art of the straight line, and some of those shapes still look right today.

By Verdad Gallardo | 2026-04-25 12:05:49


VIEW MORE
story-4
Flawlessly Restored Mercedes 190E Evo II Heads to Auction

Slideshow: The 190E Evolution II shows how a homologation necessity became a six-figure collector icon.

By Verdad Gallardo | 2026-04-22 17:53:47


VIEW MORE
story-5
Electric Mercedes C-Class Unveiled: 11 Things You Need to Know

Slideshow: Mercedes is turning one of its core nameplates electric, and the details show just how serious this shift is.

By Verdad Gallardo | 2026-04-21 13:58:06


VIEW MORE
story-6
Mercedes EQS Gets A Major Update: Everything You Need to Know

Slideshow: Faster charging, longer range, and a controversial steer-by-wire system define the latest evolution of Mercedes-Benz EQS.

By Verdad Gallardo | 2026-04-15 10:35:34


VIEW MORE
story-7
5 Underrated Mercedes-Benz Models That Don't Get the Love They Deserve

Slideshow: These overlooked Mercedes-Benz models never got the spotlight, but they quietly delivered more than most remember.

By Verdad Gallardo | 2026-04-13 19:35:45


VIEW MORE
story-8
Mercedes 300D Has Pushed Well Past 1 Million Miles and It Ain't Stopping

Slideshow: A well-used 1991 Mercedes-Benz 300D with more than one million miles is now looking for a new owner, and it still appears ready for more.

By Verdad Gallardo | 2026-04-10 10:05:15


VIEW MORE
story-9
10 Most Reliable Mercedes-Benz Models You Can Buy Used

Slideshow: From bulletproof sedans to surprisingly tough SUVs, these Mercedes models proved that the three-pointed star can go the distance.

By Verdad Gallardo | 2026-04-08 09:55:49


VIEW MORE