Is this normal? lowered ABC suspension after shutdown. - Page 2 - Mercedes-Benz Forum
Reply
 
LinkBack Thread Tools Display Modes
post #11 of 17 (permalink) Old 08-10-2016, 04:30 AM
Outstanding Contributor
 
mercy-me's Avatar
 
Date registered: Apr 2012
Vehicle: 2003 SL500, 2012 E350 4Matic P2
Location: Just north of Detroit,Michigan
Posts: 831
Mentioned: 1 Post(s)
Quoted: 63 Post(s)
Quote:
Originally Posted by Cinnasnootzer View Post
If the accumulators, or nitrogen spheres by another name, are failed or failing they can start to fill with the Pentosin fluid.....So you will not see a leak in the closed system, but the fluid is collecting in the spheres.

There is a rubber membrane in the spheres that separate the fluid side from the nitrogen side. This is the component that degrades and fails over time.

P.S. - you are very smart to get on this right away and not let it become a disaster.
Excellent advice!

The accumulators fail over time and are considered by many to be a maintenance issue of the ABC system and must be changed periodically. The accumulators attached to each valve block assembly smooth out the ride quality and help compensate for sudden suspension changes. Be sure to include these into your repair plan.

I changed out both front and rear accumulators on my R230 and did a fluid flush as part of a complete ABC system maintenance when I purchased the car. I found the front accumulator had not ruptured but the rear was ruptured and full of fluid. After changing out the accumulators, the ride quality improved immensely. The ride on the R230 is somewhat firm by design but the harshness was no longer there. Our roads in Michigan are terrible, (third world quality at best) so that improvement was much appreciated by my bum.

Good luck and keep us posted on your progress.

Bob
mercy-me is offline  
Sponsored Links
Advertisement
 
post #12 of 17 (permalink) Old 08-10-2016, 04:57 AM
BenzWorld Junior Member
 
bigmyself's Avatar
 
Date registered: Sep 2015
Posts: 20
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
I have 2005 S55 AMG w/ ABC and had the same issue last month.
I did very extensive research and finally fixed problem after removing valve block twice.
Basically, sagging when parked happen when leaks from shut-off valve in the valve block.
In my case, rear both wheels sagged in 2-3 days when parked. So I removed rear valve block, disassembled, and completely cleaned and ran rodeo. But still sagged.
So I decided to replaced o-rings and accumulator. I removed again and replaced all o-rings in the valve block except outer seal o-rings of solenoid along with accumulators.
Actually my accumulator was in good condition (you can search forum how to check the condition).
After replaced all o-rings, she keeps the heights even 7 days parking.
I spent $23.00 for o-ring set + accumulator.

Hope to solve your issue..

Sun
bigmyself is offline  
post #13 of 17 (permalink) Old 08-10-2016, 06:47 AM
BenzWorld Extremist
 
Cinnasnootzer's Avatar
 
Date registered: Mar 2014
Vehicle: 2001 ML320 2004 ML500 2011 E350 2015 ML350 2002 CL55 AMG
Location: West Coast USA
Posts: 859
Mentioned: 0 Post(s)
Quoted: 192 Post(s)
Bigmyself....would you be able to share details on the o-rings.....mostly where you purchased them and the part numbers. I have found some good information on the rebuild process but not the actual verified good source of parts and part numbers.

I am sure this is in my future to do list.

Thanks
Cinnasnootzer is offline  
Sponsored Links
Advertisement
 
post #14 of 17 (permalink) Old 08-10-2016, 09:58 AM
BenzWorld Junior Member
 
Date registered: Mar 2016
Vehicle: 2005 Mercedes-Benz S600
Location: Europe
Posts: 18
Mentioned: 1 Post(s)
Quoted: 4 Post(s)
Valve block rebuild

Post #81 in this thread mentions the dimensions and might be of help. Please feel free to add to it Bigmyself


Quote:
Originally Posted by Cinnasnootzer View Post
Bigmyself....would you be able to share details on the o-rings.....mostly where you purchased them and the part numbers. I have found some good information on the rebuild process but not the actual verified good source of parts and part numbers.

I am sure this is in my future to do list.

Thanks
Cinnasnootzer likes this.
prs600 is offline  
post #15 of 17 (permalink) Old 08-10-2016, 03:32 PM
BenzWorld Junior Member
 
bigmyself's Avatar
 
Date registered: Sep 2015
Posts: 20
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by Cinnasnootzer View Post
Bigmyself....would you be able to share details on the o-rings.....mostly where you purchased them and the part numbers. I have found some good information on the rebuild process but not the actual verified good source of parts and part numbers.

I am sure this is in my future to do list.

Thanks
I ordered my from The O-ring store LLC.
450 Piece O-ring Kit Buna-N 90 -003 to -020 [K450X18N90-003-020] : The O-Ring Store LLC, We make getting O-Rings easy!

There are two different shaped orings in the solenoid, round o-rings which seal and square o-ring which are spacer. You can order both sets from that web site. I ordered round seal o-ring set only cause I knew spacers were good condition from the first removal. Once you remove all o-rings you can see what size you have to use. Just compare with new ones. I think I used only 3 different size.

Also it will be good idea to replace accumulator and together even if yours is OK cause they are one of maintenance item need to be replaced in certain period. You have to release fluid pressure to do either job. So, this is the best time to do both.
Mercedes-Benz CORTECO Suspension Self-Leveling Nitrogen Chamber 2203270115
This is the place I ordered mine. Corteco is OEM.

At last fluid filter has to be replaced at the end of the job.

Let me know if there is anything else you want to know.


Sun
Cinnasnootzer likes this.
bigmyself is offline  
post #16 of 17 (permalink) Old 08-10-2016, 03:45 PM
BenzWorld Extremist
 
Cinnasnootzer's Avatar
 
Date registered: Mar 2014
Vehicle: 2001 ML320 2004 ML500 2011 E350 2015 ML350 2002 CL55 AMG
Location: West Coast USA
Posts: 859
Mentioned: 0 Post(s)
Quoted: 192 Post(s)
Thanks much, guys. I don't have any issues right now and the fluid looks clean so this is in prep. for when I need to get in there.
Cinnasnootzer is offline  
post #17 of 17 (permalink) Old 08-10-2016, 05:31 PM
BenzWorld Member
 
Date registered: May 2011
Vehicle: 2005 S600
Location: Virginia Beach
Posts: 353
Mentioned: 13 Post(s)
Quoted: 53 Post(s)
I put off repairing the sagging on my S600 for over a year. When I finally got to it, cleaning the valve blocks and replacing the o-rings, followed by a flush, cured the sagging. The car will now sit for a week without losing height.

I don't believe that there is any lasting damage to have it sag periodically, as long as you use the dashboard ride height button to get it back to normal height before you drive off...when it's completely collapsed, you might damage the car by moving it.

Current Fleet:
2016 Tundra 1794
2005 MB S600 (100K, Michelin AS3+, M1 0W40)
2002 V70-XC (228K Castrol 0W40)
2002 V70-T5 (198K, Mobil 1 0W40)
1932 Packard Sedan (straight 8, dual sidemount spares, original paint and interior, Shell Rotella 15W40)
Astro14 is offline  
Sponsored Links
Advertisement
 
Reply

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

Quick Reply
Message:
Options

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:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in











Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



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

close
video goes here
description goes here. Read Full Story
For the best viewing experience please update your browser to Google Chrome