S-Class (W220) 1999-2006: S 320 CDI, S 320, S430, S 500, S 600

Mystery coolant leak

Thread Tools
 
Search this Thread
 
Rate Thread
 
Old Apr 26, 2021 | 12:37 PM
  #1  
MDroll's Avatar
Thread Starter
Newbie
 
Joined: Aug 2019
Posts: 2
Likes: 1
2000 Mercedes S500L
Mystery coolant leak

Need help identifying a leak.
My 2000 s430 is loosing coolant. Nothing is dripping on the ground. But the rear passenger foot well is soaked drivers side is damp. Luckily it is only the carpet and didn't reach the SAM unit.

Even stranger is that it leaks while the engine is cold and not running. 🤷‍♂️
But when it's on and warmed up it seams to hold coolant.

The only thing I can think of would be the heater core.

Recent radiator, reservoir and hoses from radiator replaced.
The heater has not been working but I think that is a faulty duo valve.

The other suspect is that the low coolant is from trapped air that has worked it's way out. And the water is from the air conditioning condensation drain. But I can't seem to locate that drain, and google hasn't found it either.

Yes I have checked the drain under the hood above the air filter, it is clear and draining.

Any suggestions on where to start?
Reply
Old Apr 26, 2021 | 01:01 PM
  #2  
Bülent ULUÇ's Avatar
Newbie
5 Year Member
 
Joined: May 2020
Posts: 2
Likes: 1
w203 cdi
Konsolda olan kalorifer peteği ne bakman gerekir.muhtemelen patlamış

[QUOTE = MDroll; 8323566] Bir sızıntıyı tanımlamak için yardıma ihtiyacınız var.
2000 s430'um soğutma sıvısı kaybediyor. Yere hiçbir şey damlamıyor. Ancak arka yolcu ayak boşluğu sırılsıklam sürücü tarafı nemli. Neyse ki sadece halı ve SAM ünitesine ulaşmadı.

Daha da garip olan, motor soğukken ve çalışmıyorken sızıntı yapmasıdır. 🤷‍♂️
Ancak açıldığında ve ısındığında, soğutucuyu tutmak için dikiş yapar.

Aklıma gelen tek şey ısıtıcı göbeği olacaktır.

Son zamanlarda radyatörden gelen radyatör, rezervuar ve hortumlar değiştirildi.
Isıtıcı çalışmıyor ama bunun hatalı bir ikili valf olduğunu düşünüyorum.

Diğer şüpheli ise, düşük soğutucunun, çıkış yolunu açan sıkışmış havadan kaynaklanmasıdır. Ve su, klima yoğuşma tahliyesinden geliyor. Ama bu tahliyeyi bulamıyorum ve Google da bulamadı.

Evet, hava filtresinin üstündeki davlumbazın altındaki tahliyeyi kontrol ettim, temiz ve tahliye ediyor.

Nereden başlayacağınıza dair herhangi bir öneriniz var mı? [/ QUOTE]

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 06:08 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