S-Class (W140) 1991-1999: 300 SD, S 350TD, 300 SE 2.8, S280, 300 SE 3.2, 300 SEL 3.2, S320, S320L, 400 SE, S420, 400 SEL, S420L, 500 SE, S500, 500 SEL, S500L, 600 SE, S600, 600 SEL, S600L, 500 SEC, 600 SEC

Replacing Piston rings? s600 1997

Thread Tools
 
Search this Thread
 
Rate Thread
 
Old Oct 30, 2014 | 10:34 AM
  #1  
Mitchell_NY's Avatar
Thread Starter
Junior Member
 
Joined: Jul 2008
Posts: 50
Likes: 0
From: Cedar Park Texas
c280 1998, 2002 C32, 2000 Ford Excursion
Replacing Piston rings? s600 1997

Hey guys, took my car into the local shop and they are stating that the piston rings are bad and need to be replaced. Has anyone ever did this before? Car is a 1997 s600. 110k miles on it. I am in Austin texas,.

The shop just installed new plugs, boots and coil packs and it is still giving me misfires.

This car is not my daily driver so, I can afford to wait and take my time with this project.

Car doesnt feel like it has v12 power at all. any insight or tips I would really appreciate it.
Reply
Old Nov 18, 2014 | 07:50 AM
  #2  
syljua's Avatar
Member
20 Year Member
 
Joined: Jun 2005
Posts: 76
Likes: 7
From: Oslo, Norway
1998 C140 CL500
Originally Posted by Mitchell_NY
Hey guys, took my car into the local shop and they are stating that the piston rings are bad and need to be replaced.
The misfire must have progressed a long time to let gasoline wash
out the bores and destroy the rings. What do they base their statement
on? Have they done a leak down test of the cylinder?

Do they have proper MB DAS Star diagnostics machine (where the cause
of the misfire can be investigated, either by error code, or
turning a cylinder of to see if it gets worse or better). Checking the
cam advance can also be done in Star. Mixture information also.

This german thread shows whats involved when changing rings (well
that engine had gone with unburnt fuel for a long time...);
http://www.w140forum.de/showthread.php?3163

br,
syljua
Reply
Old Nov 21, 2014 | 08:59 AM
  #3  
oldsinner111's Avatar
MBWorld Fanatic!
 
Joined: Jun 2010
Posts: 1,246
Likes: 52
From: tennessee
s320
thoose engines last a long time,unless it was raced all the time.I'd make sure cylinders looked good,and hone them.
Reply

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


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


All times are GMT -4. The time now is 08:56 PM.

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