S500 mild stalling when idling - Mercedes-Benz Forum

Go Back   Mercedes-Benz Forum > Mercedes-Benz Sedan Forums > W220 S-Class
New User? Register - Forgot Password

BenzWorld.org is the premier Mercedes-Benz Forum on the internet. Registered Users do not see the above ads.
Reply
 
LinkBack Thread Tools Display Modes
Old 09-30-2011, 10:39 AM   #1 (permalink)
BenzWorld Member
 
s132008's Avatar
 
Date registered: Dec 2008
Vehicle: 1994 SL320 (R129), 2002 S500 (W220), 2011 Stokke Xplory for my daugther (Pink limited edition)
Location: Hong Kong, Asia
Posts: 121
S500 mild stalling when idling

I bought a 2001 RHD S500 about 6 months ago. It has done 110,000km but the car condition is good. The previous owner was a rich old guy and sent the car back to dealer for fixing whenever there was a problem.

Lately I feel the car is stalling mildly when idling in P or D transmission mode. It's not rattling seriously like the MAF is dead but it happens every 5 or 10 seconds. It may be a problem for long time but I just didn't aware of the stalling before.

2 months ago the CEL was on and diagnosis showed P0410 related with the secondary air injection pump. It was however in perfect condition and turned out it was the worn vacuum hoses connecting with the change over valve. I replaced most of the vacuum hoses beside the pump, erased the code and the CEL doesn't come back for almost 2 weeks. I therefore assume the vacuum lines are ok now. I've also changed the engine mounts and transmission mount when I bought the car 6 months ago. I'm thinking now if it would relate with CPS, O2 sensors and something else or it just needs a fuel injector clean.

Is there anyone have similar experience before and get resolved? Any suggestion would be very much appreciated.
s132008 is offline   Reply With Quote
Sponsored Links
Advertisement
 
Old 09-30-2011, 10:40 AM   #2 (permalink)
BenzWorld Member
 
s132008's Avatar
 
Date registered: Dec 2008
Vehicle: 1994 SL320 (R129), 2002 S500 (W220), 2011 Stokke Xplory for my daugther (Pink limited edition)
Location: Hong Kong, Asia
Posts: 121
should be 2002 S500
s132008 is offline   Reply With Quote
Old 09-30-2011, 11:11 AM   #3 (permalink)
BenzWorld Member
 
Date registered: Aug 2002
Vehicle: 2002 s500, 2004 S500 fourmatic
Location: kitchener, ontario,canada
Posts: 243
I can't relate to your description of "mildly stalling". Would a better description be a rough idle? It could be as simple as the spark plugs need changing.
tower is offline   Reply With Quote
Old 09-30-2011, 11:31 AM   #4 (permalink)
BenzWorld Member
 
s132008's Avatar
 
Date registered: Dec 2008
Vehicle: 1994 SL320 (R129), 2002 S500 (W220), 2011 Stokke Xplory for my daugther (Pink limited edition)
Location: Hong Kong, Asia
Posts: 121
I can't say it's a rough idle as it only shake once every 5 or 10 seconds but the rev needle doesn't move. It just shakes very very gently. Is it normal to Mercedes V8 engines.

I've already changed all 16 spark plugs. No malfunction shows up at onboard computer.
s132008 is offline   Reply With Quote
Old 09-30-2011, 12:41 PM   #5 (permalink)
BenzWorld Elite
 
Check Codes's Avatar
 
Date registered: Mar 2005
Vehicle: '01-E320 & 02-ST2
Location: John 15:18-19
Posts: 28,470
Is it more noticeable in gear and virtually gone in park? That might be sacked motor mounts. A bad plug wire could do that, and it wouldn't necessarily trigger a code. You can test them with an ohmmeter and replace just the bad ones (assuming you find any). A flaky MAF sensor could also account for that.

Good luck.
__________________
Socialism is a philosophy of failure, the creed of ignorance, and the gospel of envy; its inherent virtue is the equal sharing of misery. (Winston Churchill)
Check Codes is offline   Reply With Quote
Old 10-01-2011, 07:27 AM   #6 (permalink)
BenzWorld Member
 
Date registered: Aug 2002
Vehicle: 2002 s500, 2004 S500 fourmatic
Location: kitchener, ontario,canada
Posts: 243
I'm still confused with the symptoms. When it hits one (for lack of a better discription) of these stumbles, does it sound like it is a single missed ignition or does it continue to stumble for a few seconds? It could be something as simple as an "italian" tune-up being needed. Otherwise, I would tend to agree with Check Codes.
tower is offline   Reply With Quote
Old 10-01-2011, 10:49 AM   #7 (permalink)
BenzWorld Member
 
s132008's Avatar
 
Date registered: Dec 2008
Vehicle: 1994 SL320 (R129), 2002 S500 (W220), 2011 Stokke Xplory for my daugther (Pink limited edition)
Location: Hong Kong, Asia
Posts: 121
I'd say the shaking is very very minor but it happens frequently. I'm guessing the MAF now even the rpm rev was pretty stable. Anyway, I will borrow the carsoft 7.4 from my friend and check if there are any stored codes this weekend.

I just start to think if I'm too sensitive as I am comparing with idling condition with my uncle's Lexus LS600HL? The engine in Lexus was actually off when idle so I can feel nothing. Will you guys be able to feel the engine running? How can you feel the engine is running? The answer may help me to understand if I'm too sensitive...Thanks a lot.
s132008 is offline   Reply With Quote
Old 10-02-2011, 01:02 AM   #8 (permalink)
BenzWorld Junior Member
 
Date registered: Jan 2004
Vehicle: 2000 S500
Location: Nashville, TN
Posts: 26
mine too

My 2000 S500 does the exact same thing, don't see it on the RPM needle but I can definitely feel it. I don't think it's an actual miss though, at least not compared to cars I KNEW had a definite miss. I'm not worried about it for now. could be one of the 16 spark plugs in my car, not sure when they were changed last and I have 140,000 miles on it.
__________________
Do not try...DO!...Or DO NOT!...There is no TRY!--yoda
greggyc is offline   Reply With Quote
Old 10-02-2011, 01:10 AM   #9 (permalink)
BenzWorld Elite
 
Date registered: Sep 2009
Vehicle: nothing broken. finally!
Location: lexusville. population: old people.
Posts: 2,619
AC compressor cycling?
__________________
vw phaeton. when vw copies mercedes, but forces you to service it next to golfs and jettas
gyrate is offline   Reply With Quote
Old 10-04-2011, 07:47 AM   #10 (permalink)
mjd
BenzWorld Veteran
 
mjd's Avatar
 
Date registered: Aug 2008
Vehicle: 94 E320 Sportline sedan 86 190E 2.3 16V sedan 04 S430 Sport
Location: Texas
Posts: 678
I would have to concur with plug wires as a probable cause. Given the age of them (10 yrs) and the probability that they have not been changed, they have been known to cause stumbling and hesitation issues when they start to fail.
mjd is offline   Reply With Quote
Reply

  Mercedes-Benz Forum > Mercedes-Benz Sedan Forums > W220 S-Class

Bookmarks



Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
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 Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Topic Author Forum Replies Last Post
Idling and Stalling on 420 SEL orienthus General Mercedes-Benz 0 02-24-2010 04:53 PM
Occasional unstable idling and stalling stonecan R170 SLK Class 17 11-26-2008 09:06 PM
rough idling and stalling w124 aus W124 E,CE,D,TD Class 6 07-17-2005 12:56 AM
ML320 Starting, Stalling, and Idling Issues jtn999 W163 M-Class 1 07-22-2004 07:14 AM
Starting, Idling, stalling and a/c problems Guest (MBNZ) W124 E,CE,D,TD Class 2 06-03-2002 07:14 AM


All times are GMT -7. The time now is 03:33 PM.



Powered by vBulletin® Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Search Engine Friendly URLs by vBSEO 3.6.1

vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.