SL-Class (R230) 2003 -- 2012: Discussion on the SL500, SL550, SL600

SL/R230: 2003 SL500 Rear ABC Hose Part Number

Thread Tools
 
Search this Thread
 
Rate Thread
 
Old Jul 3, 2021 | 06:53 PM
  #1  
Aussiesuede's Avatar
Thread Starter
Senior Member
10 Year Member
Photogenic
Photoriffic
Liked
 
Joined: Jan 2015
Posts: 389
Likes: 113
From: Seattle, WA
SL500
2003 SL500 Rear ABC Hose Part Number

I need help identifying a pressure hose attached to port "P" on the rear valve block. It is the hose 2nd from the left in the attached picture which attached to the top port on the valve block. There is a rupture in the rubber hose portion. I am able to disconnect the rubber hose from the metal elbow which is connected to the valve block but haven't a clue where the other end leads to? I'm
Not finding a part number stamped on the hose?

Reply
Old Jul 4, 2021 | 08:59 AM
  #2  
MikeJ65's Avatar
MBWorld Fanatic!
5 Year Member
Photogenic
 
Joined: Aug 2020
Posts: 1,326
Likes: 365
From: Gretna, NE
'03 SL55 Black, '03 SL500's Aegean, Mars Red, Tazanite, Alabaster, '11 S550 Flint Gray
I believe that is 2309970452. It would not include the tube that actually attaches to the valve block. It is the pressure line from the tee under the drivers floorboard back to the quick connect at the rear valve block. Not a bad line to put in, but one of the first to fail.
Reply
Old Jul 4, 2021 | 10:36 AM
  #3  
RScott's Avatar
Junior Member
 
Joined: Apr 2021
Posts: 28
Likes: 5
S55, SL500, 500SL
I just replaced that line two days ago. Price was $99 from a place in Minnesota. Took exactly 2 liters of oil to replace what was lost when the line ruptured.

MikeJ65, what other lines can I expect to replace soon? Maybe I should replace some or all preemptively? As things are now, I wouldn't take this car on a long trip for fear of being stranded with a broken hose.
Reply
Old Jul 4, 2021 | 03:18 PM
  #4  
Aussiesuede's Avatar
Thread Starter
Senior Member
10 Year Member
Photogenic
Photoriffic
Liked
 
Joined: Jan 2015
Posts: 389
Likes: 113
From: Seattle, WA
SL500
Originally Posted by MikeJ65
I believe that is 2309970452. It would not include the tube that actually attaches to the valve block. It is the pressure line from the tee under the drivers floorboard back to the quick connect at the rear valve block. Not a bad line to put in, but one of the first to fail.
Thank so much! Part confirmed via diagram and ordered. You've been heaps of help and it's much appreciated!
Reply
Old Jul 4, 2021 | 03:24 PM
  #5  
Aussiesuede's Avatar
Thread Starter
Senior Member
10 Year Member
Photogenic
Photoriffic
Liked
 
Joined: Jan 2015
Posts: 389
Likes: 113
From: Seattle, WA
SL500
Originally Posted by RScott
I just replaced that line two days ago. Price was $99 from a place in Minnesota. Took exactly 2 liters of oil to replace what was lost when the line ruptured.
.
Did you run into anything unusual with the installation? It looks pretty straightforward. If I'm seeing things correctly,. The process should be:

1) Disconnect quick connect at valve block tube.

2) unscrew rubber isolator with 3 hard lines Running through it.

3) Disconnect hardline from T-Connector.
Reply
Old Jul 5, 2021 | 07:35 AM
  #6  
RScott's Avatar
Junior Member
 
Joined: Apr 2021
Posts: 28
Likes: 5
S55, SL500, 500SL
It is straightforward. I reinstalled the new line by making the connection at the T-Connector first, and I think that made it easier.
Reply
Old Jul 5, 2021 | 08:14 AM
  #7  
MikeJ65's Avatar
MBWorld Fanatic!
5 Year Member
Photogenic
 
Joined: Aug 2020
Posts: 1,326
Likes: 365
From: Gretna, NE
'03 SL55 Black, '03 SL500's Aegean, Mars Red, Tazanite, Alabaster, '11 S550 Flint Gray
RScott,

After the rear pressure line, it gets a bit more complicated as to which lines to replace proactively. The front pressure line is also failure prone, but it is way more difficult to install.. This line is the one with the tee piece attached. You might look at the posts where people replace the hose portion and reattach to the tube with a compression fitting. While the compression fitting is not as good as a new solid tube, it does allow you to get back on the road quickly. You also have pressure lines from the pump to the pressure valve and the valve to the tee. The strut lines can fail, but in my opinion, they are not high enough risk to do preemptively.
Reply

Currently Active Users Viewing This Thread: 4 (0 members and 4 guests)
 


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


All times are GMT -4. The time now is 11:54 AM.

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