Check coolant
Out Of Control!!
Joined: Apr 2019
Posts: 11,993
Likes: 6,827
From: Silicon Valley
W212 MY'14 M276-3.5NA @75kMi
false positive
To save your time, use a scanner to read your chassis faults. You'll see what module is calling what faults...
Coolant level does NOT look low!
Having a new tank already perhaps the sensor itself failed and soaked the connector.
Coolant level does NOT look low!
Having a new tank already perhaps the sensor itself failed and soaked the connector.
MBWorld Fanatic!
Joined: Aug 2017
Posts: 1,697
Likes: 522
2019 S560, 2015 Honda Civic Hybrid
Looks like you have some white crusty stuff on the threads for the cap ... that's an indication of coolant leaking.
I had this on my car and just got an $8 replacement cap on Amazon. Haven't seen any more messages or had to add any coolant since
I had this on my car and just got an $8 replacement cap on Amazon. Haven't seen any more messages or had to add any coolant since
Out Of Control!!
Joined: Apr 2019
Posts: 11,993
Likes: 6,827
From: Silicon Valley
W212 MY'14 M276-3.5NA @75kMi
SOLVING COOLANT... solenoid !!!
difference between A and B... lost coolant
Back when my engine was 10Mi old it started venting coolant already...
the issue with coolant and oil leaks is not exactly WHERE it leaks but WHY does it have to leak?
As soon as one weak spot is plugged up, the next one opens up... wild goose chase!
Your M176 engine has just been identified as using low oil pressure: this overheats the engine coolant, engine oil plus tranny oil simply driving around.
This stored heat causes extreme heatsoaks when the engine is stopped... coolant circuit gets under extreme pressure and is forced to vent out.
So resolve to fix the cause not the dozen consequences.
Last edited by CaliBenzDriver; Nov 14, 2024 at 01:33 PM.
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Senior Member
Joined: Apr 2023
Posts: 481
Likes: 305
2014 S63 2010 ML350 Bluetec 2009 SL550
I am gonna politely call BS on that. I've seen you post a lot of wild speculation about the "oil pump mod" and when it comes to cooling and "heat soak" - to be gentle, you are way out over your skiis.
It's the job of the *coolant* and the cooling system to keep the car's motor from running too hot. Yes the oiling system does also carry some heat as well but running the oil pump at lower speeds is not going cause "heat soak", overheated motors and a general "the sky is falling" scenario. I have a much more powerful motor (M157) in a larger car that of course generates more heat than a V6. I have not noticed ANY issues related to heat of any kind. It doesn't heat my garage any more than another other car I have owner and it still performed flawlessly on a trip this summer down to the mountains of NC. Triple digit passes on Route 81 in triple digit heat caused no more drama or stress than they do in lower temps. The motor behaved flawlessly.
The OP is not losing coolant because he didn't bypass the oil pump solenoid. Please don't sow fear where none is needed.
It's the job of the *coolant* and the cooling system to keep the car's motor from running too hot. Yes the oiling system does also carry some heat as well but running the oil pump at lower speeds is not going cause "heat soak", overheated motors and a general "the sky is falling" scenario. I have a much more powerful motor (M157) in a larger car that of course generates more heat than a V6. I have not noticed ANY issues related to heat of any kind. It doesn't heat my garage any more than another other car I have owner and it still performed flawlessly on a trip this summer down to the mountains of NC. Triple digit passes on Route 81 in triple digit heat caused no more drama or stress than they do in lower temps. The motor behaved flawlessly.
The OP is not losing coolant because he didn't bypass the oil pump solenoid. Please don't sow fear where none is needed.
Last edited by TripleDown; Nov 14, 2024 at 04:03 PM.
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Out Of Control!!
Joined: Apr 2019
Posts: 11,993
Likes: 6,827
From: Silicon Valley
W212 MY'14 M276-3.5NA @75kMi
don't change a thing...
I am gonna politely call BS on that. I've seen you post a lot of wild speculation about the "oil pump mod" and when it comes to cooling and "heat soak" and to be gentle, you are way out over your skiis.
It's the job of the *coolant* and the cooling system to keep the car's motor from running too hot. Yes the oiling system does also carry some heat as well but running the oil pump at lower speeds is not going cause "heat soak", overheated motors and a general "the sky is falling" scenario. I have a much more powerful motor (M157) in a larger car that of course generates more heat than a V6. I have not noticed ANY issues related to heat of any kind. It doesn't heat my garage any more than another other car I have owner and it still performed flawlessly on a trip this summer down to the mountains of NC. Triple digit passes on Route 81 in triple digit heat caused no more drama or stress than they do in lower temps. The motor behaved flawlessly.
The OP is not losing coolant because he didn't bypass the oil pump solenoid. Please don't sow fear where none is needed.
It's the job of the *coolant* and the cooling system to keep the car's motor from running too hot. Yes the oiling system does also carry some heat as well but running the oil pump at lower speeds is not going cause "heat soak", overheated motors and a general "the sky is falling" scenario. I have a much more powerful motor (M157) in a larger car that of course generates more heat than a V6. I have not noticed ANY issues related to heat of any kind. It doesn't heat my garage any more than another other car I have owner and it still performed flawlessly on a trip this summer down to the mountains of NC. Triple digit passes on Route 81 in triple digit heat caused no more drama or stress than they do in lower temps. The motor behaved flawlessly.
The OP is not losing coolant because he didn't bypass the oil pump solenoid. Please don't sow fear where none is needed.
You don't need to do anything to your stock engine to get the standard ownership experience.
Everything is carefully engineered with excellent results.
I suggest you service engine oil before 5kMi (not 10kMi!) and while you're at it notice how fast it becomes black...
Last edited by CaliBenzDriver; Nov 14, 2024 at 04:21 PM.
Super Member
Joined: May 2011
Posts: 975
Likes: 270
From: Fort Worth TX
2020 S560, 2014 SLK55 (Prev. 2016 S65, 2013 SLK350, 2008 CLS63, 2006 E350, 2006 CLS500, 2005 C230K)
Let's keep it calm
That bootle is low, full is at the level that the white part ends. Also it's normal for level to variate a bit from cold to hot as coolant expands (hence the name expansion tank) but if you notice you are loosing coolant that cap does look like it needs replacement.
On the oil control solenoid, that's a whole debate but you'd blow the engine before you evaporate coolant so no need to worry about that being related to this.
On the oil control solenoid, that's a whole debate but you'd blow the engine before you evaporate coolant so no need to worry about that being related to this.
Out Of Control!!
Joined: Apr 2019
Posts: 11,993
Likes: 6,827
From: Silicon Valley
W212 MY'14 M276-3.5NA @75kMi
ALL OPTIONS VALID...
That bootle is low, full is at the level that the white part ends. Also it's normal for level to variate a bit from cold to hot as coolant expands (hence the name expansion tank) but if you notice you are loosing coolant that cap does look like it needs replacement.
On the oil control solenoid, that's a whole debate but you'd blow the engine before you evaporate coolant so no need to worry about that being related to this.
On the oil control solenoid, that's a whole debate but you'd blow the engine before you evaporate coolant so no need to worry about that being related to this.
No need to reflect ignorance with insults.
Thank you.
The usual list of WHERE coolant pressure is going to leak is this :
- coolant cap
- coolant tank split up
- radiator crimps
- pipes o-rings
- heat exchanger gasket: MAYO!
- (heater core)
- turbo inter-cooler
- ....
The reason WHY coolant gets overpressured after engine stop is the extreme heat stored in pistons. That's what reduced oiling does.
before solenoid valve has a chance to jam it is used to restrict pump pressure while driving under 3500.Rpm. .... limited heat transfer.> Bonus Saver:
check your Camshaft Position Sensors for "oil-in-harness" - Oily ECU gets killed by heatsoaks: cool $10k repair.
> All Good Choices....:
-1- You can be proactive: cancel "root cause"
or
-2- You can be reactive: "life is fun!"
"damn the torpedoes" hit & miss can benefit from superior Mercedes warranty.
Last edited by CaliBenzDriver; Nov 14, 2024 at 08:40 PM.
