R-Class (W251) Produced 2006-2013: R320CDI, R350, R420CDI, R500

2007 4Matic R500

Thread Tools
 
Search this Thread
 
Rate Thread
 
Old Dec 16, 2014 | 01:37 AM
  #1  
JMcIntee's Avatar
Thread Starter
Newbie
 
Joined: Dec 2014
Posts: 1
Likes: 0
2007 R500
2007 4Matic R500

Problem started with a sag to the right rear. On startup, compressor would run, hyperextending the left rear, bringing the right rear to normal height. Disconnected the lines at the equalizer(?) valve where the compressor line joins the block to check for leaks - none found. With the system totally deflated, compressor ran, vehicle leveled as per normal, and was good for a couple of weeks. A few days ago it began again, and I repeated the process. I noticed the sag beginning as I was driving, the compressor kicked in, and even though it appeared the right rear was sagging, the bag exploded long before the compressor finished running. Dropped hard on the rear axle. I intend to replace both bags, suspension level sensors, and the equalizer valve. I have found everything BUT what I refer to as the equalizer. It's located on the passenger side, just beside the rad. Compressor line comes in, air lines out, multi-pin plug. I would greatly appreciate the proper part number/name so I can source it, and would also like to know if there's anything else I should replace. Vehicle has 189,000 kms on it, remains very strong, and likely the most reliable vehicle I've had the pleasure to drive. Help appreciated!
Reply
Old Dec 31, 2014 | 10:43 AM
  #2  
Jay Tyner's Avatar
Newbie
 
Joined: Feb 2010
Posts: 1
Likes: 0
98 E320
07 R320 130k miles also has a sag while shut off.

Upon start up everything balances and is ok. Let me know of any preventative solutions....
Reply
Old Jan 2, 2015 | 02:28 PM
  #3  
davidbho's Avatar
Member
 
Joined: Nov 2006
Posts: 228
Likes: 3
From: california
X166, 997
new new shocks

it's just a matter of time before it fails to inflate completely. Replacement shocks are inevitable, basically they start to fail every 80k or so miles.
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 10:38 AM.

story-0
New Electric Mercedes-AMG GT 4-Door Coupe Unveiled: 10 Things You Need to Know

Slideshow: Mercedes-AMG's new electric GT 4-Door Coupe trades combustion for software, synthetic noise, and more than 1,100 horsepower.

By Verdad Gallardo | 2026-05-20 20:08:15


VIEW MORE
story-1
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-2
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-3
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-4
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-5
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-6
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-7
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-8
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-9
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