Correct engine coolant?
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Codger49
MB Enthusiast
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This is the place for looking up MB fluids:
Mercedes-Benz Specifications for Operating Fluids: Overview Sheets
Mercedes-Benz Specifications for Operating Fluids: Overview Sheets
Thanks Codger, will have a look.
I did check the owners hand book first but it does not , as far as I can see, list the type or total amount needed.
I kind of expected it to say, the required type and total amount, so that why I asked here.
Can anyone recommend a make of the correct type just for topping up.
Thanks
I did check the owners hand book first but it does not , as far as I can see, list the type or total amount needed.
I kind of expected it to say, the required type and total amount, so that why I asked here.
Can anyone recommend a make of the correct type just for topping up.
Thanks
Gazwould
MB Enthusiast
grober
MB Master
Your engine will be a OM651 DE22LA
And antifreeze meeting MB 325.6 diluted to 50/50 with water should be fine
MB 325.6 - Anticorrosion/antifreeze agents (Specification 325.6) - Mercedes-Benz Specifications for Operating Fluids
If you want to use premixed then check out MB 326.6
And antifreeze meeting MB 325.6 diluted to 50/50 with water should be fine
MB 325.6 - Anticorrosion/antifreeze agents (Specification 325.6) - Mercedes-Benz Specifications for Operating Fluids
If you want to use premixed then check out MB 326.6
grober
MB Master
Just be sure check whether its premixed 50/50 or 100% antifreeze[ requires diluting with water] before you start. It will be marked on the container
Gazwould
MB Enthusiast
Xstream g48 concentrate X 1Ltr.
Got the check the level of the anti freeze warning pop on this morning. Had a look at the level in the reservoir and it's just a little down from the required level, no leaks, just a tad low.
Got the check the level of the anti freeze warning pop on this morning. Had a look at the level in the reservoir and it's just a little down from the required level, no leaks, just a tad low.
Gazwould
MB Enthusiast
Same G48 coolant and warning here .
Good price ?
Good price ?
grober
MB Master
Sorry but to meet MB325.6 it has to be
Comma Xstream G40 Antifreeze & Coolant - Concentrated - 1 Litre
They are both oat [ organic additive technology] technology but differ in their pH [ acidity] and life 3years G48 v 5years G40
To be honest I don't know if there is a significant difference or not but I would stick with what's in there already?
Comma Xstream G40 Antifreeze & Coolant - Concentrated - 1 Litre
They are both oat [ organic additive technology] technology but differ in their pH [ acidity] and life 3years G48 v 5years G40
To be honest I don't know if there is a significant difference or not but I would stick with what's in there already?
Last edited:
Gazwould
MB Enthusiast
I agree , the Comma site can't be up to date . Products and specs get superceded .
This is exactly the crack with engine oil too , MB 229.51 , use MB 229.52 !
I don't know what coolant is in mine because of this daft electronic printout servicing .
The Comma G48 is dark green and the Comma G40 is blue ?
This is exactly the crack with engine oil too , MB 229.51 , use MB 229.52 !
I don't know what coolant is in mine because of this daft electronic printout servicing .
The Comma G48 is dark green and the Comma G40 is blue ?
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If it's only a tad low, your best bet is to simply top-up with water and watch the level over the next few weeks.
Gazwould
MB Enthusiast
Never heard of coolant being good for 15 years , would be nice though .
Now you can see why I posted this question.
The hand book does say 180 months and so does the Comma xstream g48 on its product page but on looking further it say 3years.
Comma Xstream g40 say its good for 5yrs but shown as not suitable for my car.
All in all, not the most easy of information to make a choice of what to use.
One last point, how much coolant does this engine require for a complete change, not found that yet.
The hand book does say 180 months and so does the Comma xstream g48 on its product page but on looking further it say 3years.
Comma Xstream g40 say its good for 5yrs but shown as not suitable for my car.
All in all, not the most easy of information to make a choice of what to use.
One last point, how much coolant does this engine require for a complete change, not found that yet.
Got a 1Ltr on order via eBay @ £7 inc postage
Gazwould
MB Enthusiast
What color is your existing coolant ?
grober
MB Master
First the G48 only meets an old MB approval so can be comfortably removed from the discussion
Second the MB marketing men answer - because MB branded coolant 235.6 is sprinked with magic fairy dust ---------this despite containing the same BASF GLYSANTIN SI-OAT technology that the other coolant manufacturers offer.
Third- the possible engineering answer-- that coolant life is dependant on many factors including resistance to thermal breakdown and corrosion which in turn is going to be heavily dependant on the antifreeze pH, the pH of the water its mixed with, and the resistance to corrosion of the vehicle surfaces its going to come in contact with. I'm going to venture that an MB 15 year cycle is a best case factory fill scenario with a "virgin"cooling system composed of corrosion resistant materials and using a 50/50 mix of de-ionised / distilled water to maintain a neutral coolant pH. In other words the 15 year coolant lifequoted is particular to given set of circumstances pertinent only to its use in certain MB vehicles under what you might term ideal conditions. Comma's figure of 5 years is perhaps the opposite- a worst case scenario--- they have to quote for a wide variety of vehicle manufacturers using different coolant system materials and perhaps water of varying quality /hardness/pH and whose coolant systems may be past their best.
The topics are covered by BASF's glysantin website question and answer section https://www.glysantin.de/en/
a couple of quotes:-
How often do coolants have to be changed?
In the cooling system, pH buffers and additives are gradually degraded and become less effective with time. We therefore recommend a complete change of coolant every three to four years. It is also strongly recommended to clean the cooling system and completely renew the coolant whenever the cooling system is repaired. This prevents rust, contamination and suspended particles remaining in the system leading to scale, corrosion and other damage.
What are the advantages of coolants that have been officially approved by vehicle manufacturers?
Vehicle manufacturers do not “recommend” any particular engine coolants, but they do grant official approvals. New vehicles are filled with approved engine coolants when they leave the factory and these can be replaced during the warranty period without affecting the manufacturer’s warranty. On average, engine coolants have to undergo thirty different tests before they are approved by the engine manufacturers. These consist of different corrosion and compatibility tests with the original components of the cooling system, but also engine and vehicle tests. Engine manufacturers do not give official approval to coolants until they have passed all the tests. The process takes three to five years and is very expensive. If any changes are made to the coolant formula, the entire approval process has to be repeated. GLYSANTIN® has the most approvals from leading vehicle manufacturers.
Can normal tap water be used to dilute GLYSANTIN® concentrate products?
Normal tap water can usually be used to dilute coolant concentrates if it does not exceed 3.5 mmol/l (20 degrees German water hardness) or does not contain more than 100 ppm chlorine or sulfate. We recommend using demineralized or distilled water. If you would like to use the product directly without dilution, please use GLYSANTIN® Ready Mix products as they are already diluted with water and ready for use.
