C-Class (W204) 2008 - 2014: C180K, C200K, C230, C280, C300, C350, C200CDI, C220CDI, C320CDI

Coolant Warning appears

Thread Tools
 
Search this Thread
 
Rate Thread
 
Old 01-15-2010, 08:47 AM
  #26  
MBWorld Fanatic!
 
Diesel Benz's Avatar
 
Join Date: Dec 2006
Location: Europe
Posts: 6,340
Received 293 Likes on 245 Posts
223.168 & 213.012 & 906.633 & 214.005
Originally Posted by Geoff000
I will be able to provide you with more details. They are sending me detailed paperwork on the work done. They just didn't have it all ready when I picked up my car. I will post more details about the part when I find out.
I would certainly be interested too. There isn't much more than the front SAM and the cluster that are linked to the sensor and the sensor warning at the cluster. A dealer may well have found an issue at the cluster, not completely fixing it, then an issue at the front SAM, not completely fixing it, and then adding a bit of coolant which together with replacing the parts fixed the issue.

The coolant level warnings anyway are so common in this model that any additional info would be very useful.
Old 01-18-2010, 11:34 AM
  #27  
Junior Member
 
chris5949's Avatar
 
Join Date: Apr 2009
Posts: 42
Likes: 0
Received 0 Likes on 0 Posts
2008 C300 4MAT LX
Off topic...but my old 98 C230 when coolant warning light on I cannot move past 1-2 gear, is the computer restricted so not to damage the engine/xmission?
Old 01-29-2010, 06:04 PM
  #28  
Junior Member
Thread Starter
 
Geoff000's Avatar
 
Join Date: Aug 2009
Location: Melbourne, Australia
Posts: 40
Likes: 0
Received 0 Likes on 0 Posts
2009 Mercedes Benz C350 CDi
Just thought I would provide an update to the problem I had. The dealer replaced the SAM control unit, updated software and coding update and it seems to have fixed the problem.
Old 01-29-2010, 06:15 PM
  #29  
Super Moderator

 
Glyn M Ruck's Avatar
 
Join Date: Jun 2008
Location: Llandudno, Cape Town, South Africa
Posts: 19,941
Received 175 Likes on 142 Posts
late 2009 CLK 350 Coupe Elegance, '65 Jaguar S Type wires
Thanks - so it's the darn SAM problem again!!
Old 01-30-2010, 01:47 AM
  #30  
MBWorld Fanatic!
 
Diesel Benz's Avatar
 
Join Date: Dec 2006
Location: Europe
Posts: 6,340
Received 293 Likes on 245 Posts
223.168 & 213.012 & 906.633 & 214.005
Originally Posted by Geoff000
Just thought I would provide an update to the problem I had. The dealer replaced the SAM control unit, updated software and coding update and it seems to have fixed the problem.
Odd if there is a hardware issue. Means most dealers are not willing to fix it if the warning only appears infrequently (or was it staying on?).

Did they try the software update and SCN coding first? Would have been useful to know if that would have been sufficient.
Old 01-30-2010, 03:36 PM
  #31  
MBWorld Fanatic!
 
Carsy's Avatar
 
Join Date: Mar 2008
Location: 1 hours drive north of Sydney Australia
Posts: 3,714
Received 55 Likes on 52 Posts
2007 W204 220CDI Classic Sedan
Anyone, like me, who needs an explanation on SAM units ,this is a prety good site :-

http://74.125.153.132/search?q=cache...&ct=clnk&gl=au
Old 04-30-2018, 01:19 PM
  #32  
Newbie
 
TintMerc's Avatar
 
Join Date: Apr 2018
Posts: 4
Likes: 0
Received 0 Likes on 0 Posts
C300
Coolant

My coolant check light just came on just as I started the car, (c300) few secs after it disappeared, am on a road trip if I need to top up which I will do, which coolant is recommended.
Thks
Old 05-01-2018, 03:57 PM
  #33  
Newbie
 
Crimzon's Avatar
 
Join Date: Sep 2014
Location: Missouri
Posts: 147
Likes: 0
Received 5 Likes on 5 Posts
2010 M_B C300 ... Wife drives a 2007 GL450
Could be the coolant temp sensor which is a pain to get to .had to replace mine ... 2010 sensor is located on the back of the driver below the head ... Hope this helps
Old 07-13-2018, 04:08 PM
  #34  
Newbie
 
Marie Klosowski's Avatar
 
Join Date: Jul 2018
Posts: 1
Likes: 0
Received 0 Likes on 0 Posts
2010 CLS550
I just did the same exact thing yesterday

Originally Posted by Geoff000
Just an update. Took the Car to Mercedes Benz dealer. They have not been able to identify why the warning comes up. Checked codes, software etc and cannot find anything wrong. Funny though, on the way home from picking the car up, the warning came up for about 5 seconds and then disappeared. The dealer is now looking further into it.
Old 07-21-2018, 01:32 PM
  #35  
Newbie
 
Steveb1948's Avatar
 
Join Date: Mar 2018
Posts: 12
Received 0 Likes on 0 Posts
2002 Mercedes cl550
Coolant low message

Originally Posted by Diesel Benz
I would certainly be interested too. There isn't much more than the front SAM and the cluster that are linked to the sensor and the sensor warning at the cluster. A dealer may well have found an issue at the cluster, not completely fixing it, then an issue at the front SAM, not completely fixing it, and then adding a bit of coolant which together with replacing the parts fixed the issue.

The coolant level warnings anyway are so common in this model that any additional info would be very useful.
I've had the same problem for moths on my CL55. Changed header tank and sender still the same. Wasted money in local merc dealers. Running out of ideas
Old 12-28-2018, 05:09 PM
  #36  
Newbie
 
Holbrook2005's Avatar
 
Join Date: Dec 2018
Posts: 3
Likes: 0
Received 0 Likes on 0 Posts
C300 Sport
Possible Corroded Connector on Level Sensor

If your level seems good then check the connector to the coolant level sensor. Sometimes the pins on the connector get corroded. Clean the connector and see if this fixes the problem. If not you may consider changing the coolant level sensor. If your MB is pre 204 you may be able to by the level sensor. For my c300/ 204 I had to buy the whole coolant reservoir. On a scale of 1 to 10 I would put this job at a 3.5 .
Old 01-03-2019, 12:45 PM
  #37  
Newbie
 
Steveb1948's Avatar
 
Join Date: Mar 2018
Posts: 12
Received 0 Likes on 0 Posts
2002 Mercedes cl550
Hi
thanks for that.mines a 2002 CL55 but same applies.
i changed the complete coolant tank and sensor,checked connections,still same,I've just been living with it for about eight months now.
also other probs but don't stop me using her. SRS light always on and the electric fan sensor wasn't working. I did an old school fix on the latter. Fitted a mercury switch from a sixties kenlow type fan into top hose. Not as efficient but seems to work well enough!
steve
Old 07-31-2021, 09:18 PM
  #38  
Newbie
 
Jedicounsel59's Avatar
 
Join Date: Jan 2018
Posts: 6
Likes: 0
Received 0 Likes on 0 Posts
CLK350
Coolant sensor and washer fluid sensor

I bought my 2007 CLK 350 4 years ago from a mechanic and dealer, and both lights have continually been on regardless of fluid level. I didn;t know about the specialiszed wiper fluid til today though. I'm just used to it now. I was going to change out the reservoir but after the no go recommendations here,maybe not.

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 


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

Quick Reply: Coolant Warning appears



All times are GMT -4. The time now is 10:58 AM.