ML55 AMG, ML63 AMG (W163, W164) 1999 - 2011 Two Generations

Coolant Vent Hose?

Thread Tools
 
Search this Thread
 
Rate Thread
 
Old Sep 29, 2012 | 01:49 PM
  #1  
da_guitarist's Avatar
Thread Starter
MBWorld Fanatic!
 
Joined: Sep 2006
Posts: 1,833
Likes: 2
From: Atlanta
Current: AMG GT-C. Sold: 01 CLK55, 00 ML55, 01 ML55, 06 E55
Coolant Vent Hose?

Hey folks, question for you... if you look at the coolant expansion tank (back of the engine bay right up by the hood), there is a hose coming out of the left side. Left side while looking at it from the front with the hood open

I found mine loose today when changing spark plugs (yes, my hands are sore). Is that a vent hose or should it be attached somewhere? THanks!

Reply
Old Sep 29, 2012 | 06:41 PM
  #2  
benzmodz's Avatar
MBWorld Fanatic!
20 Year Member
Photogenic
Photoriffic
Shutterbug
 
Joined: Jul 2005
Posts: 3,221
Likes: 11
From: Sydney, Australia
W203 slightly modified
If the hose is not firmly clipped to anything and the end can flay all over the place then it's probably snapped off. The good news is that the parts are really cheap.

If the tube runs down and is tied down then it's overflow.
Reply
Old Sep 30, 2012 | 11:38 AM
  #3  
da_guitarist's Avatar
Thread Starter
MBWorld Fanatic!
 
Joined: Sep 2006
Posts: 1,833
Likes: 2
From: Atlanta
Current: AMG GT-C. Sold: 01 CLK55, 00 ML55, 01 ML55, 06 E55
Thanks benzmodz. Can someone have a look and let me know where that hose should go? Mine is burned up and if it's more than a drain hose then I will replace it. I couldn't tell where it went in any drawings but it looks like a vent hose. Would love some confirmation! Thx!
Reply
Old Oct 7, 2012 | 10:52 PM
  #4  
da_guitarist's Avatar
Thread Starter
MBWorld Fanatic!
 
Joined: Sep 2006
Posts: 1,833
Likes: 2
From: Atlanta
Current: AMG GT-C. Sold: 01 CLK55, 00 ML55, 01 ML55, 06 E55
BUMP, anybody out there?
Reply
Old Oct 8, 2012 | 09:26 AM
  #5  
PTE's Avatar
PTE
MBWorld Fanatic!
 
Joined: Jul 2005
Posts: 1,224
Likes: 6
From: S.E. FLA.
05 ML-500 , 03 CLK5.5 AMG has left the Garage
Cooling tank Hoses

Long Time no see LOL. I to brought a ML (ML-500) 2005 64,000 miles and I'm trying to make it perfect again. At 67,000 mile the spark plugs were flat slap worn out. Gap was opened up .007 , tips were rounded . My arms & Hands were cut to hell !!Still easier than the 03 CLK 55. Installed new front shocks. Torsion bar Bushings from Boschnut. Shocks were weak , front end float , Torsion bar pads Crack into 3 pieces , Lower front ball joints worn & noisy. All this was easy work done in my home garage on the floor. Cleaned the Mass air flow sensor and did some small mods to increase the intake air flow. The owner was a nice person , I just let little thing anoy me. Well back to your hose identification Please see the attached pictures
Cheers PTEngineering
Attached Thumbnails Coolant Vent Hose?-coolant-tank-1-medium-.jpg   Coolant Vent Hose?-coolant-tank-2-medium-.jpg  
Reply
Old Oct 8, 2012 | 03:42 PM
  #6  
da_guitarist's Avatar
Thread Starter
MBWorld Fanatic!
 
Joined: Sep 2006
Posts: 1,833
Likes: 2
From: Atlanta
Current: AMG GT-C. Sold: 01 CLK55, 00 ML55, 01 ML55, 06 E55
You are the man. thanks so much!!! I was hoping this was the case. I had placed it in the clip temporarily already

I think my shocks are rather worn out as well. did you use Bilstein?
Reply
Old Oct 8, 2012 | 04:32 PM
  #7  
PTE's Avatar
PTE
MBWorld Fanatic!
 
Joined: Jul 2005
Posts: 1,224
Likes: 6
From: S.E. FLA.
05 ML-500 , 03 CLK5.5 AMG has left the Garage
Shock for a lowered ML? 55 Amg

You can look at Monroe Reflex P/N 911133. , but they do not just bolt in. You have to use the OEM Upper bushings, Washers & sleeve ( Not the ones that come in the Monroe's Box). On the lower end of the Monroe Shock The metal sleeve that is molded into the round opening . Must be Drilled out using a 9/16ths Drill bit ( $25.00) The use a grade 8 washer to help center & space the shock for proper clearance , Assemble using the OEM lower mount bolt. The OEM lower shock bushing assy has a cone type spacer , ( See Picture #4) I'll probably cut them cone part off & trim them up in the lathe . Install them at a later date. Update and installed now

Now from what I have read. If you lower the ML. Via The Torsion bar adj screw, The ride gets pretty hard over rough roads & pot holes. There is only
1.5" of shock travel to start with. See Picture #3 , So the shock hits the Orange rubber bump stop pretty easy on a lowered ML . You can Gain some of the travel back by cutting 3/4" of the bump stop off. See Picture #3

The OEM shock travel Length is 1.375" Vers Monroe 3.375"
Extended Lenght 15" Vers Monroe 14.375"
Compressed Lenght 13.625"Vers Monroe 10"
So The Monroe Reflex for the Ford Lighting Truck is working well on my ML-500 The ride is Smooth & turning control is much better than the worn out OEM shocks at 66,000 miles
Cheers _PTEngineering
Attached Thumbnails Coolant Vent Hose?-oem-ml-ft-shock.jpg   Coolant Vent Hose?-shock-travel-1.5-inchs.jpg   Coolant Vent Hose?-rubber-bump-stop-1-medium-.jpg   Coolant Vent Hose?-dsc00223-medium-.jpg   Coolant Vent Hose?-dsc00224-medium-.jpg  


Last edited by PTE; Oct 8, 2012 at 04:43 PM.
Reply
Old Oct 8, 2012 | 09:54 PM
  #8  
cm60k's Avatar
MBWorld Fanatic!
15 Year Member
Photogenic
Photoriffic
Shutterbug
 
Joined: Aug 2006
Posts: 7,053
Likes: 398
From: A.D., U.A.E
2000 (W202 C200) & 2000 (W202 C55)
Originally Posted by PTE
Cleaned the Mass air flow sensor and did some small mods to increase the intake air flow.
Hey Patrick, Thankss for sharing that info. with us....,,

What kind of Air increase mods. you done..?, is it the MAF mesh removal.....??

ZAYED,,
Reply
MB World Stories

The Best of Mercedes & AMG

story-0

6 Mercedes Models That Did NOT Age Well (But Are Somehow Still Cool)

 Verdad Gallardo
story-1

Manual Mercedes? 6 Times Sindelfingen Let Drivers Have All The Fun

 Verdad Gallardo
story-2

Mercedes SLR McLaren 722 S Is Extremely Rare Example Modified by McLaren

 Verdad Gallardo
story-3

8 Classic Boxy Mercedes Designs That Have Aged Like Fine Wine

 Verdad Gallardo
story-4

Flawlessly Restored Mercedes 190E Evo II Heads to Auction

 Verdad Gallardo
story-5

Electric Mercedes C-Class Unveiled: 11 Things You Need to Know

 Verdad Gallardo
story-6

Mercedes EQS Gets A Major Update: Everything You Need to Know

 Verdad Gallardo
story-7

5 Underrated Mercedes-Benz Models That Don't Get the Love They Deserve

 Verdad Gallardo
story-8

Mercedes 300D Has Pushed Well Past 1 Million Miles and It Ain't Stopping

 Verdad Gallardo
story-9

10 Most Reliable Mercedes-Benz Models You Can Buy Used

 Verdad Gallardo
Old Oct 11, 2012 | 08:43 AM
  #9  
PTE's Avatar
PTE
MBWorld Fanatic!
 
Joined: Jul 2005
Posts: 1,224
Likes: 6
From: S.E. FLA.
05 ML-500 , 03 CLK5.5 AMG has left the Garage
Mas air flow sensor Mods

I'm about to change the air filter , I'll post pictures next week
Cheers _PTEngineering
Reply
Old Oct 14, 2012 | 07:12 PM
  #10  
da_guitarist's Avatar
Thread Starter
MBWorld Fanatic!
 
Joined: Sep 2006
Posts: 1,833
Likes: 2
From: Atlanta
Current: AMG GT-C. Sold: 01 CLK55, 00 ML55, 01 ML55, 06 E55
Looking forward to this!
Reply
Old Oct 22, 2012 | 05:26 PM
  #11  
PTE's Avatar
PTE
MBWorld Fanatic!
 
Joined: Jul 2005
Posts: 1,224
Likes: 6
From: S.E. FLA.
05 ML-500 , 03 CLK5.5 AMG has left the Garage
Mass Air Flow sensor mods

This works quite well No CELs . I've used this mod on many cars . Including my 03 CLK 55 for the last 16,000 miles & my new to me 05 ML-500 for the last 5000 miles. I guess it is the old school coming out in me < NO, i did not check for improved or increaased air flow , on the Flow bench
Cheers _PTEngineering
Attached Thumbnails Coolant Vent Hose?-dsc00278.jpg   Coolant Vent Hose?-dsc00281.jpg  
Reply

Currently Active Users Viewing This Thread: 2 (0 members and 2 guests)
 


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


All times are GMT -4. The time now is 04:44 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