C32 AMG, C55 AMG (W203) 2001 - 2007

2005 C55 AMG Coolant leak

Thread Tools
 
Search this Thread
 
Rate Thread
 
Old May 29, 2016 | 05:41 PM
  #1  
Chan C Saelee's Avatar
Thread Starter
Newbie
 
Joined: Apr 2016
Posts: 4
Likes: 0
2005 C55 AMG
2005 C55 AMG Coolant leak

Checked all over the forums and google and have found nothing like my problem.

I was returning home late at night and my "check coolant level" message came on. I got home and figured since it is very hot, I'd wait until the morning. Fast forward a few hours, it's 9am and about 78deg out side. I pop my hood and notice my coolant reservoir is pretty low, not completely empty but about 1/4 left in it. I top it off and let her sit the entire day. At around 8pm I hop in the car and back out and notice a puddle of liquid on the ground and the message has come on again (check coolant level). I check the reservoir again and it looks lower than where I topped it off at. How does it pull from my reservoir if the car is off? I figured its a bad sensor or something so I took her out for 20 mins or so to go to the store and back. The whole time, I was monitoring the temp and there was nothing irregular, car ran fine. I get home and park and still bugged by the message, I check the radiator and notice some liquid dripping on the ground again, looks like it is coming form the center hole of that plastic cover on the bottom of the car. This morning I checked her out again and noticed it is still dripping stuff on the ground. So I start looking at the radiator closer and notice that the left side (driver's side) of the radiator has some liquid rolling down. I follow it up and under the hose at the very top I see lots of liquid. How can it leak if it has been sitting all night? and leak from the top and drain the reservoir while car is off? bad hose? bad radiator? im puzzled. ohh, its a clear liquid.
Reply
Old May 30, 2016 | 02:35 AM
  #2  
Mercedesamg5532's Avatar
Junior Member
 
Joined: Jan 2016
Posts: 44
Likes: 1
C55 amg
Originally Posted by Chan C Saelee
Checked all over the forums and google and have found nothing like my problem.

I was returning home late at night and my "check coolant level" message came on. I got home and figured since it is very hot, I'd wait until the morning. Fast forward a few hours, it's 9am and about 78deg out side. I pop my hood and notice my coolant reservoir is pretty low, not completely empty but about 1/4 left in it. I top it off and let her sit the entire day. At around 8pm I hop in the car and back out and notice a puddle of liquid on the ground and the message has come on again (check coolant level). I check the reservoir again and it looks lower than where I topped it off at. How does it pull from my reservoir if the car is off? I figured its a bad sensor or something so I took her out for 20 mins or so to go to the store and back. The whole time, I was monitoring the temp and there was nothing irregular, car ran fine. I get home and park and still bugged by the message, I check the radiator and notice some liquid dripping on the ground again, looks like it is coming form the center hole of that plastic cover on the bottom of the car. This morning I checked her out again and noticed it is still dripping stuff on the ground. So I start looking at the radiator closer and notice that the left side (driver's side) of the radiator has some liquid rolling down. I follow it up and under the hose at the very top I see lots of liquid. How can it leak if it has been sitting all night? and leak from the top and drain the reservoir while car is off? bad hose? bad radiator? im puzzled. ohh, its a clear liquid.
I had the same problem and I had to change the heater hose and radiator. But It could be just one of those two in your case.
Reply
Old Jun 2, 2016 | 01:16 AM
  #3  
Chan C Saelee's Avatar
Thread Starter
Newbie
 
Joined: Apr 2016
Posts: 4
Likes: 0
2005 C55 AMG
Originally Posted by Mercedesamg5532
I had the same problem and I had to change the heater hose and radiator. But It could be just one of those two in your case.
Exactly as you stated. Thanks. Got them replaced. Hopefully thats the end of it haha. Thanks agian.
Reply
Old Jun 2, 2016 | 02:03 AM
  #4  
Bigpapistu's Avatar
Member
 
Joined: Nov 2015
Posts: 162
Likes: 10
From: DFW, TX
03 E55
Originally Posted by Mercedesamg5532
I had the same problem and I had to change the heater hose and radiator. But It could be just one of those two in your case.
My heater core and radiator fixed my solution. I had to pay $500 with labor and parts just for the hoses...then I find out my radiator was cashed also.......lol
Reply
Old Jun 2, 2016 | 09:44 AM
  #5  
kbob999's Avatar
Super Member
10 Year Member
Liked
Loved
Community Favorite
 
Joined: Jul 2014
Posts: 992
Likes: 245
From: Tucson, AZ
'20 X5 M50i; '17 Ram 3500; Golf Cart; Bikes; Scooters
For future reference, it could also be the oring gasket on the radiator hose. DIY is easy.
You can pull the hose out by removing a clip at the radiator (slide it sideway actually). Drain the coolant down first or you'll be sorry.
The end of the hose has a metal band with an O ring gasket.
Replace the gasket, clean the fittings, pop it back together, put the coolant back in (use a coffee filter in a funnel). Should be less than $15 part.
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 11:06 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