Parts Catalog Accessories Catalog How To Articles Tech Forums
Call Pelican Parts at 888-280-7799
Shopping Cart Cart | Project List | Order Status | Help



Go Back   PeachParts Mercedes-Benz Forum > Mercedes-Benz Tech Information and Support > Tech Help

Reply
 
LinkBack Thread Tools Display Modes
  #1  
Old 01-31-2011, 03:46 AM
ps2cho's Avatar
Registered User
 
Join Date: Jun 2006
Location: Chandler, Arizona
Posts: 3,523
When do you know Rear SLS Shocks are dead?

My 300TE's rear end in the last 3 months has turned really, really heavy on speed bumps. It really "slams" down and sinks far down.
My SLS hasn't worked since I bought the car 4 years ago, it hasn't caused me any grief or issue so haven't really worried about it. Fluid level is still fine in the reservoir so its not leaking...

The general ride feels perfectly fine, it just seems to really dip low on speed bumps. It is not bouncy or anything and with 5 heavy people loaded up in the car I have no issues at all.

How do you tell when these type of shocks are worn out? Are they really $500/each
Any thoughts?

__________________
2016 Monsoon Gray Audi Allroad - 21k
2008 Black Mercedes E350 4Matic Sport - 131k
2014 Jeep Wranger Unlimited Sahara - 62k
2003 Gray Mercedes ML350 - 122k
Reply With Quote
  #2  
Old 01-31-2011, 09:13 AM
Moderator
 
Join Date: Mar 1999
Location: Tucker, Ga USA
Posts: 12,153
Most common issue is from knocking noises.

Other than that, if the leveling is still working but the car feels like it bounces easily.
BUT isn't hard
__________________
MERCEDES Benz Master Guild Technician (6 TIMES)
ASE Master Technician
Mercedes Benz Star Technician (2 times)
44 years foreign automotive repair
27 Years M.B. Shop foreman (dealer)
MB technical information Specialist (15 years)
190E 2.3 16V ITS SCCA race car (sold)
1986 190E 2.3 16V 2.5 (sold)
Retired Moderator
Reply With Quote
  #3  
Old 01-31-2011, 01:38 PM
babymog's Avatar
Loose Cannon - No Balls
 
Join Date: Jan 2006
Location: Northeast Indiana
Posts: 10,767
If the dampers are shot, they will usually leak. I haven't heard of them losing damping, but it is certainly possible.

If they aren't damping; bottoming out and bouncy, it is possible that they are worn out. It is also possible that (since your system isn't working properly) they have air in them, which doesn't damp at all, would be pretty much like a car without shocks. Any air in the shock will cause a loss of damping, and could even give you a thump when the air is out of the chamber and the first of the fluid hits the valve. It is possible if you had a sphere/accumulator failure that the pressurized nitrogen from the failed accumulator(s) has made its way into the damper or dampers.

Also, the system does rely on some pressurization (via the leveling pump and valve) to keep the fluid in the dampers from boiling/cavitation, if your system isn't working then the damping (especially jounce) can suffer.
__________________

Gone to the dark side

- Jeff
Reply With Quote
  #4  
Old 01-31-2011, 02:18 PM
amosfella's Avatar
Registered User
 
Join Date: Jun 2006
Location: Vulcan, AB, Canada
Posts: 787
There may be rebuild kits available for those shocks...
__________________
All it takes for evil to prevail is for good men to stand by and do nothing.

Too many people tip toe through life, never attempting or doing anything great, hoping to make it safely to death... Bob Proctor

'95 S320 LWB
'87 300SDL
'04 E500 wagon 4matic
Reply With Quote
  #5  
Old 01-31-2011, 06:31 PM
Registered User
 
Join Date: Jun 1999
Location: Albuquerque, NM USA
Posts: 1,946
It's usually not the "shocks" (which aren't--they're levelers) but instead the accumulators (which are the shocks).

The accumulators are round pressure vessels hidden under the rear floor. They're more like $100.

Since the levelers are indeed VERY expensive, they are only replaced when leaking/broken and not necessarily in pairs.
__________________
Kent Christensen
Albuquerque
'07 GL320CDI, '06 SLK350
Reply With Quote
  #6  
Old 01-31-2011, 07:09 PM
babymog's Avatar
Loose Cannon - No Balls
 
Join Date: Jan 2006
Location: Northeast Indiana
Posts: 10,767
If you look at "shock absorbers" as the component that dampens movement of the suspension, these are shock absorbers. True that there is a remote-mounted accumulator, much like on racing shock absorbers, and also true that they are used to carry some of the load thus keeping the car level, but their primary function is to damp motion in the suspension. The most accurate description in American English would be "shock absorber". I prefer "damper" as the Brits might say, but to me it is more accurate and has that delicious English flavor to it.
__________________

Gone to the dark side

- Jeff
Reply With Quote
  #7  
Old 02-01-2011, 03:01 AM
Registered User
 
Join Date: Jan 2008
Location: Melbourne Australia
Posts: 834
The shocks leaking is a sign that they are through.
The spheres also leak These are the general cause for a "Bouncy" rear .
The spheres are much cheaper than the shocks and changing them is a DIY job.

There's a flow chart for testing the spheres somewhere - do a search.
Reply With Quote
  #8  
Old 02-01-2011, 11:47 AM
Registered User
 
Join Date: Sep 2007
Location: Fort Worth TX
Posts: 151
There's a ball joint at the bottom of the SLS shock where it attaches to the control arm... they wear out on high mileage cars and give a harsh ride and knocking sound (and feel) over bumps (assuming the accumulators and the rest of the system is OK). That's what is currently the situation on my 560SEL. Will have to replace both $L$ $hock$ to repair it on my car.
__________________
Erich Loepke
2010 Ford Focus
Currently Benz-less
Reply With Quote
  #9  
Old 02-01-2011, 12:46 PM
babymog's Avatar
Loose Cannon - No Balls
 
Join Date: Jan 2006
Location: Northeast Indiana
Posts: 10,767
I believe that the 124T SLS mouting is different; conventional shock-mount at the top and two bolts fastening the lower which has a slight variation on the eye-bushing arrangement.
__________________

Gone to the dark side

- Jeff
Reply With Quote
  #10  
Old 02-02-2011, 10:44 PM
Registered User
 
Join Date: Aug 2005
Location: Toronto
Posts: 394
there's a balljoint at the bottom of a 124T SLS hydraulic ram (shock). i haven't seen a bad one but someone asked me the other day if i has spares because they had one with a bad balljoint so i guess it happens.
__________________
________________

punkinfair
Reply With Quote
  #11  
Old 02-04-2011, 11:11 AM
olmectech's Avatar
Registered User
 
Join Date: Feb 2008
Posts: 14
I have a 300te and I recently re-built the accumulators and replaced one of the leaky rear shocks. Before the car was bouncing like a pogo stick. Now it rides and handles like a new Mercedes. You can buy the shocks new for $382 online

Reply With Quote
Reply

Bookmarks

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 On
Trackbacks are On
Pingbacks are On
Refbacks are On




All times are GMT -4. The time now is 05:49 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2018 Pelican Parts, LLC - Posts may be archived for display on the Peach Parts or Pelican Parts Website -    DMCA Registered Agent Contact Page