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Zerex G-05 vs. the real Mercedes coolant

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I had an e-mail exchange with the tech folks at Valvoline that I thought some of you might be interested in reading. The Zerex G-05 and the Mercedes coolant apparently are not identical, but probably close enough for government work.

ME: Is Zerex G-05 identical to the Mercedes branded coolant that I would buy at a dealership? Also, since it seems like AutoZone no longer carries Zerex G-05, where can I find it in my area?

ZEREX: Yes, the Zerex G-05 is the approved coolant for the Mercedez Benz application. Our biggest supplier for the product is Carquest Auto Parts. Other options include Napa, Auto Zone, Advance, O'Reilly's, & Pep Boys. If these places don't carry the product, please just ask them to order it for you.

ME: Thank you for your reply. Is the Zerex G-05 identical to the Mercedes branded coolant? Earlier this year there was a rebate on the purchase of the Zerex G-05. Are there any plans for a repeat of that promotion in the works?

ZEREX: It is not IDENTICAL, but the Mercedez formulation and Zerex G-05 are 100% compatible. I am not sure about promotions. Please give our hotline a call at 1-800 TEAM VAL and ask for promotions for this information.

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Re: Zerex G-05 vs. the real Mercedes coolant

In the US, Valvoline is licensed to use the BASF forumlation for Glysantin G 05, a hybrid organic acid technology (HOAT) which has been used by Mercedes since the 1980's. Valvoline (Zerex brand name) began creating the forumlation in the US for Daimler-Chrysler and Ford around the year 2000.

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Re: Zerex G-05 vs. the real Mercedes coolant

Compatible by no means indicates equivalent.

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Re: Zerex G-05 vs. the real Mercedes coolant

uberwgn;127456 wrote:
Compatible by no means indicates equivalent.

In many instances it does, such as in the field of generic prescription drugs. Are you aware of any performance differences between Zerex jug and the MB jug?

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Re: Zerex G-05 vs. the real Mercedes coolant

I suspect that the tech you got your information from was not fully informed. The late Marshall Booth said that Valvoline supplies MB USA with the coolant for factory fill of new cars made here in USA (Zerex G-05). Incidentally, G-05 is the name of the Mercedes specification (equivalent would be Mobil naming an oil 'Mobil 229.3').

Now, is it chemically identical to the product that MB puts into its car made in Germany or other locations? Probably not. Is it chemically identical to what is in the MB branded jug your dealer can sell you? Probably not. Does it meet MB specs? Absolutely.

Bottom line: either use the MB dealer item or the Zerex G-05, because these coolants ARE different in several important ways from generic green coolant. Read all about it here:

Star Tuned article on coolant:

https://www.mbwholesaleparts.com/StarTuned/pdfs/AntiFreeDec04.pdf

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Re: Zerex G-05 vs. the real Mercedes coolant

Maxbumpo;127496 wrote:
Incidentally, G-05 is the name of the Mercedes specification (equivalent would be Mobil naming an oil 'Mobil 229.3').

I believe that BASF lays claim to the G 05 moniker. It goes along with their other "G" categories. The actual Mercedes specification ID is DBL 7700.20 / 325.0

BASF Product Information

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Re: Zerex G-05 vs. the real Mercedes coolant

MTI;127476 wrote:
In many instances it does, such as in the field of generic prescription drugs. Are you aware of any performance differences between Zerex jug and the MB jug?

In most cases it doesn't, IMO.

Why would the people at Zerex say it's not exactly the same if it was :confused:

It's very easy to find out. See if the Zerex meets the published MBz spec :) If it does, surely it will be printed on the bottle or on the MSDS.

We've seen this discussion so many times in relation to VW/Audi and other the companies that produce "compatible" or "universal" products. VW/Audi has a printed spec for their coolant. When we ask if the "compatible" product meets the published VAG (VW) spec, guess what the answer is ;)

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Re: Zerex G-05 vs. the real Mercedes coolant

Maxbumpo;127496 wrote:
I suspect that the tech you got your information from was not fully informed. The late Marshall Booth said that Valvoline supplies MB USA with the coolant for factory fill of new cars made here in USA (Zerex G-05).

I wonder if Marshall got his information from a tech at Valvoline like I did? If so, could that tech have been misinformed? Maybe we ought to go for best out of three. :)

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Re: Zerex G-05 vs. the real Mercedes coolant

uberwgn;127505 wrote:
In most cases it doesn't, IMO.

Why would the people at Zerex say it's not exactly the same if it was :confused:

Again, are you aware of any advantage, significant or insignificant, of using the white MB jug over the gold Zerex jug?

I do recognize that there are various OEM parts that have proven to be better than the "OEM-like" or aftermarket pieces, such as the pneumatic motor mounts on the W201/W124 . . . but I believe in this case, one would be hard pressed to justify the cost differences.

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Re: Zerex G-05 vs. the real Mercedes coolant

MTI;127504 wrote:
I believe that BASF lays claim to the G 05 moniker. It goes along with their other "G" categories. The actual Mercedes specification ID is DBL 7700.20 / 325.0

BASF Product Information

I stand corrected! I'm sure I remember reading on the back of a Zerex G-05 bottle that it was formulated to meet 'MB G-05 specification'. I just searched the Valvoline website and could only find a statement "Mercedes Benz Approved" in the list of specifications that it meets.

Also found this tidbit: "What vehicles use Zerex G-05 in the factory fill and what is the dye color?
1984 Mercedes and beyond (light yellow) "

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Re: Zerex G-05 vs. the real Mercedes coolant

MTI;127513 wrote:
Again, are you aware of any advantage, significant or insignificant, of using the white MB jug over the gold Zerex jug?

I am not a chemist and these companies generally don't share their trade secrets, as you've found.

For the dollar or two of perceived savings, my money is on OE parts bought for cheap $$$ :) That's been my strategy for years and I'm comfortable with it.

In some cases, I'll agree that you can't pop over to the local dealership and pay their silly prices which are sometimes marked up from "retail". I make all attempts to plan ahead on basic stuff (filters, coolant, oil, rotors, etc.) and do an annual order so the crap is sitting in my basement and I'm ready to go as needed. This has been the only economical way I've found to be able to keep these cars well-serviced.

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Re: Zerex G-05 vs. the real Mercedes coolant

If memory serves me, up until recent model years, there were at least 2 things that were common to most, if not all, Mercedes cars. They would be fuses and coolant.

As regards coolant, Mercedes manufactures, distributes and sells cars all over the world. In some places the climate is so hostile and the water so bad that Mercedes insists on the use of distilled water and their branded coolant.

Since I don't live in one of these hostile environments, I feel comfortable with skirting around the edges a bit and using "inferior" water (from the tap, not the well) and "inferior" coolant (Zerex G-05).

I will continue to take the risk until someone demonstrates a downside to me.

Of course Mercedes is right to specify the fluids as they do. They are playing to the lowest common denominator in a Third World country.

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Re: Zerex G-05 vs. the real Mercedes coolant

I haven't been to their website today but the jug of Xerex G-05 I have in my hand was bought at NAPA last month (and used in a Ford, but that's irrelevant). On the front it says "This product is AUTOMAKER APPROVED for use in the following vehicles: Chrysler...Mercedes..." On the back it says "Xerex G-05 is the ONLY antifreeze/coolant chemistry APPROVED by both Ford & DaimlerChrysler. Automaker Approved Chemistry means the coolant chemistry: 1) Is the same as specified by the automaker, and 2) Has been thoroughly tested to provide the same superior protection as the original fluid."

The capitalizations and emphasis are as stated on the jug. They seem to not have yet caught on to the split of Daimler from Chrysler but that's a minor point. Xerex is not saying 'compatible', they say IT IS Mercedes antifreeze. That seemed rather strong wording to me, but its right there on the golden plastic.

On another subject (possibly suitable for another thread?):

MTI;127513 wrote:
I do recognize that there are various OEM parts that have proven to be better than the "OEM-like" or aftermarket pieces, such as the pneumatic motor mounts on the W201/W124 . . .

I am planning to replace W124 motor mounts soon. Tell me the story about M-B as opposed to aftermarket ones. At my favorite parts suppliers website I see mounts sourced from Corteco/Freudenberg ($70), United States($53) and First Equipment Quallity ($30). I think you are telling me to avoid the $30 ones. How about the $70 ones?

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Re: Zerex G-05 vs. the real Mercedes coolant

Robert Goodwin;127615 wrote:

Since I don't live in one of these hostile environments, I feel comfortable with skirting around the edges a bit and using "inferior" water (from the tap, not the well) and "inferior" coolant (Zerex G-05).

Your coolant habits appear to be perfectly fine, given your location on the water hardness map on the last page of this MB article on coolant:

Star Tuned article on coolant:

https://www.mbwholesaleparts.com/StarTuned/pdfs/AntiFreeDec04.pdf

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Re: Zerex G-05 vs. the real Mercedes coolant

Don,

I think you asked the price of a motor mount for an '89 300E? Duval says $99 with their usual discount applied for internet orders. Our local dealer sometimes 'inflates' the list price so I tend to consult Duval instead of asking locally. The way it usually works is that the better Worldpac part is from the same source that M-B uses. Because of the caveat expressed I didn't know if that was true here or not.

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Re: Zerex G-05 vs. the real Mercedes coolant

Which coolant is recommended for the 60's MB 111.

I read on the Zerex label that G 05 is recommended for older models as well. My mechanic has told me to use the standard green coolant that was used in the US cars.

Does anybody have any feedback on this?

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Re: Zerex G-05 vs. the real Mercedes coolant

I use the real Mercedes coolant in all of my cars except the 560SL. I am considering using Zerex G05 this winter when I am due to do the cooling system service in three of my cars. Not quite positive about that yet though.

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Re: Zerex G-05 vs. the real Mercedes coolant

Wallace,

I am using G-05 in everything and I would use it in an older M-B as well. If you have a new car that calls for something else that might be different. But for anything long out of warranty I like the low-pH technical approach of the G-05 coolant. That seems to be kinder to Al parts than the high-pH green approach. Even though it has no plastic radiator to protect or Al parts the Ford I mentioned putting it in was a '66 Mustang.

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Re: Zerex G-05 vs. the real Mercedes coolant

Great Advice!

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Re: Zerex G-05 vs. the real Mercedes coolant

If you compare the labels the ingredients list is virtually identical. I recall there being one item on the M-B bottle that the G-05 doesn't have or vice-versa.

Having said that I believe that Zerex makes the M-B stuff for them and they probably have a contract that prevents them from selling the "identical" formula and claiming it is identical...so they are able to call it "compatible" and not "identical". M-B can still private label it and compete claiming the formula is different, which, technically it is. Whether that difference matters or not in terms of the way the product works in the cars...I doubt it. Most people just mix it with tap water that's full of so many minerals and impurities that the small differences between formulae is probably insignificant.

I've used both in my cars and would say I only prefer G-05 because I can buy it locally instead of having to go to the dealer. Plus it is at least $5 a gallon less expensive to boot.

AND USE ONLY DISTILLED WATER WITH ANY COOLANT YOU CHOOSE!

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Re: Zerex G-05 vs. the real Mercedes coolant

Gary Phipps;127680 wrote:
Our local dealer sometimes 'inflates' the list price so I tend to consult Duval instead of asking locally.

Yours too? I thought mine were the only thieves that did that :D

I also caught my dealer selling standard Bosch parts and charging M-B list plus 10% for them...talk about pigs. When challenged they claimed M-B stopped labeling the individual boxes for things like glow plugs and spark plugs which I later found out is total B-S as I ordered some from Duval and sure enough the boxes have M-B stickers with their own PN and designations on them...so my dealer is basically screwing over both M-B and its customers by marking up Bosch parts to M-B prices (plus 10%) and buying them from aftermarket jobbers - the same source that your local Pep Boys or Autozone gets them from.

Isn't greed good? It leads to lying and cheating.

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Re: Zerex G-05 vs. the real Mercedes coolant

Hi,

There are several posts, including one from Don350SDL, that strongly suggest NOT using Distilled Water except for a short period of time following a Cooling System Flush.

IIRC, the content of tap water will NOT harm your MB cooling system. Use Spring Water if you like, but from my own personal history over 25 years of Benz ownership, ordinary Tap Water mixed 50/50 with MB Coolant has worked perfectly. Flush and refill every 2-3 years.....

Just my opinion based on personal anecdotal experience, YMMV........

Chuck........

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Re: Zerex G-05 vs. the real Mercedes coolant

AND USE ONLY DISTILLED WATER WITH ANY COOLANT YOU CHOOSE!

Sure, if you live or drive in North Africa, Middle East, Southwestern U.S., parts of Australia and other places where the water will erode your teeth and leave deposits on your radiator cap while you watch.

Distilled water contains no minerals, is not usually found in nature and can present an entire set of unique problems.

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Re: Zerex G-05 vs. the real Mercedes coolant

This is the first time I have have every heard anyone say not to use distilled water to dilute antifreeze. Have you ever looked into a radiator that's had hard tap water in it...that's where all that white scale comes from.

The reason for it is so you know you aren't altering the chemistry of the base anti-freeze or its ph. I would never imagine a case where using tap water would be preferable and NEVER would I use spring water.

Just for kicks I emailed Valvoline and asked them to chime in...hopefully that will put an end to the debate.

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Re: Zerex G-05 vs. the real Mercedes coolant

Gentlemen,

Please take a look at the article I've linked to; on the last page is a map of the US that shows were MB says tap water is too hard and where it is OK. If you live close to a boundary or don't believe the map, ask your local water utility (they are required to track and report, and probably provide said report free to all consumers).

Star Tuned article on coolant:

https://www.mbwholesaleparts.com/StarTuned/pdfs/AntiFreeDec04.pdf

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Re: Zerex G-05 vs. the real Mercedes coolant

The article is very interesting, thanks for reminding me of it. Look on Page 2 of 10, under the photo there is the caption that begins with "Perfect together - Mercedes-Benz Anti-Freeze coolant and distilled water".

It's also interesting to note that about 80-90% of the country is black on their map on page 10 of 10 where at least 90% of the population lives (CA, TX, downstate NY, CT, FL, and practically the entire east coast) indicating the water is too hard to be used. I can also tell you from my experience that NH which is all shown blue, as being "safe" actually has very hard water. My own was measured at 240 PPM when I had it tested so don't believe the map either.

I'd stick with my original recommendation that in all cases it is preferable to use distilled water in your cooling system since you basically eliminate not only hardness but other impurities that you don't want to introduce into it, period. Nowhere have I seen a recommendation against using distilled water other than from the prior posts in this thread...every other reference I could find either strongly recommends using it or tells you straight-out to use it.

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Re: Zerex G-05 vs. the real Mercedes coolant

What's all this obsessing over coolant?

Use MB brand antifreeze or the Zerex G-05 with clean water- - period. - in ALL older MBs.

BUT - watch the coolant requirements for the newer cars - see my STAR article or STARTUNED article from which I received information . . .

The important parameter is pH between 7.0 and 8.0

If you want to use distilled water - no problem - it stops being distilled once you add MB brand antifreeze to it anyway. . .

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Re: Zerex G-05 vs. the real Mercedes coolant

Valvoline just responded to my inquiry to their "ask Zerex" inquiry page:

You always want to use distilled water for antifreeze mixing.

I'd say listen to the authorities and the people who make the product. If you want to use tap water go ahead...you'll save $2 and maybe ruin your cooling system over time but maybe not and you can put that $2 towards repairs.

Most people don't keep a car long enough for it to matter anyway but it is a fact that distilled water is better than tap in cooling systems.

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Re: Zerex G-05 vs. the real Mercedes coolant

GeorgeMurphy;127792 wrote:
If you want to use distilled water - no problem - it stops being distilled once you add MB brand antifreeze to it anyway. . .

Seriously, a statement like that one is just nonsense.

Following that logic then you might as well pee into your radiator...after all, it stops being pee once it mixes with the antifreeze too.

The fact is that the minerals and dissolved impurities present in all non-distilled water precipitates out of the mixture and collects on the surfaces inside your cooling system over time. Changing the coolant and water with fresh stuff actually adds more scale over time since it refreshes the mineral content.

Eventually your radiator has no small passages left open and your car overheats, then you need to replace it. If you don't want scale in there then don't introduce the source of it by using anything other than distilled water. That's why it is recommended by almost everyone who understands basic chemistry and those who actually make the stuff and the cars that it goes into.

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Re: Zerex G-05 vs. the real Mercedes coolant

I feel I need to weigh in. I use the Zerex in both my MB's, the 560SL and the 420SEL and distilled water. I live in the Phoenix AZ area and the water here is some of the hardest I have ever seen. It does bad things to appliances and toilets. I hate to think about what the build up would look like in my car's radiator. I wilol say that it took many flushes to get the green antifreeze out after a mechanic inadvertanntly put than in my 560SL.

Michael in Arizona

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Re: Zerex G-05 vs. the real Mercedes coolant

Marty,

The question of this thread was the equivalence of two different ethylene glycol mixtures not whether it should be mixed with distilled water.

You must not be a chemist. Neither am I, but I have had enough chemistry courses to know that distilled water is pure H2O with no other ions or impurities floating about. Once you put anything other than more distilled water into distilled water, antifreeze or otherwise, the water is no longer pure and it CANNOT be classified as distilled. That is all George was saying and he it absolutely, technically correct. The other fluids you mention were neither mentioned, anticipated and I am certain not sanctioned by George.

If my memory serves me properly it wasn't all that many years ago that the official M-B words on radiator water was 'water that you would drink'. I.e., clean water as opposed to muddy creek water. One of the reasons for the M-B coolant spec is that they know most of the world doesn't have or use distilled water and much of the world's water is somewhat hard water. So their coolant preference is tempered by what will work best with not-so-soft water. Whether or not to use distilled water in your coolant borders upon a religious conviction and we don't need to fight those battles here. The easy answer for a maker is to say 'distilled only' that way they avoid trying to educate users as to when, and when not to use tap water. If we always blindly followed every makers recommendation then this thread wouldn't exist; we would all use M-B coolant, period.

My newest car is 18 years old, my oldest is 68. The average age of my 4 driver cars is 40 years and 2 of those I owned before my 27 year old son was born. You can't claim that I don't keep cars long enough to know what problems evolve. I have NEVER used distilled water in any of their radiators. Whether you need distilled water depends upon where you live and other issues. Its not always required, but if you want, it won't hurt if you are mixing it with antifreeze. I have seen discussions that pure distilled water, with no other additions, actually corrodes metal faster than tap water although I can't say how accurate that statement might be.

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Re: Zerex G-05 vs. the real Mercedes coolant

It seems my earlier post wasn't understood?

Gary Phipps;127623 wrote:
On the back it says "Xerex G-05 is the ONLY antifreeze/coolant chemistry APPROVED by both Ford & DaimlerChrysler. Automaker Approved Chemistry means the coolant chemistry: 1) Is the same as specified by the automaker, and 2) Has been thoroughly tested to provide the same superior protection as the original fluid."

...Xerex is not saying 'compatible'...

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Re: Zerex G-05 vs. the real Mercedes coolant

I guess since the subject of the orignal thread seemed to have been addressed (that the two products may not be identical but are compatible and Zerex is both approved for use and actually used as factory fill by M-B) and the thread was hijacked to discuss the merits of using distilled Vs. tap water I felt obliged to defend my position and explain its rationale only because I'd never heard anyone before recommend against using distilled water and it seemed very odd to me and I didn't want to let a post like that go un-answered.

Mr. Murphy's statement seemed to imply, at least as I had interpreted it, that once you mix it with the coolant it's no longer distilled water therefore it doesn't matter what you use seemed ludicrous to me. I guess you can parse his words down and prove that technically what he said is true, which you did, but then, interpreting it that way doesn't really contribute anything to the debate since anything you mix with coolant isn't what it started out as (hence my "pee" comparison).

It's always interesting to find technical experts who's opinions will differ from those of the manufacturers of the products they use. In this case, M-B and Zerex both recommend using distilled water (Zerex recommended ONLY use distilled water) and none of the makers say there is any risk in using it whereas there is a proven risk in using some other sources of water. I'll simply re-iterate that for those who want to be assured that what they are mixing with their coolant won't damage their cooling systems that they use distilled water and not tap. I'd call using distilled water a "best practice" then as most manufacturers would agree it is.

Now that I've beaten the horse to death we can all move on and don't have to keep re-iterating the same point over and over ad nauseum.

I'm sorry if I've bored/offended/ticked-off/slighted/embarassed/ anyone and so please accept my sincere regret if that happened. It's just there's so much misinformation floating around the internet that when something that has been pretty much accepted as a "best practice" is attacked I felt it necessary to defend it.

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Gary S Phipps's picture
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Re: Zerex G-05 vs. the real Mercedes coolant

As I think has already been alluded to, the advantage of distilled water is that it doesn't introduce any unwanted compounds into the system. We all agree that COULD be an advantage but its not a guaranteed improvement depending upon the situation.

But there are those who attribute magic powers to the world distilled. I know of one individual who won't use antifreeze but instead uses pure distilled water with the reasoning: Distilled water lacks ions, therefore it won't conduct electricity. Stray electrical currents cause electroclytic corrosion. Therefore, if I fill the engine with distilled water that will prevent electrolytic corrosion in the system.

This person is distrustful of all antifreeze claims and fearful that anything other than water would harm his engine. That's probably the absolutely worst thing you could do since there is NO protection whatsoever for the system. Once the distilled water contacts the metal of the engine it picks up ions, becomes conductive and the whole argument falls apart. Once its in the engine, its no longer distilled.

Viewed in that context George's comment about distilled water was neither flippant, unreasonable nor required any contortions to be pertinent.

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Re: Zerex G-05 vs. the real Mercedes coolant

Gary Phipps;127857 wrote:
As I think has already been alluded to, the advantage of distilled water is that it doesn't introduce any unwanted compounds into the system. We all agree that COULD be an advantage but its not a guaranteed improvement depending upon the situation.

But there are those who attribute magic powers to the world distilled. I know of one individual who won't use antifreeze but instead uses pure distilled water with the reasoning: Distilled water lacks ions, therefore it won't conduct electricity. Stray electrical currents cause electroclytic corrosion. Therefore, if I fill the engine with distilled water that will prevent electrolytic corrosion in the system.

This person is distrustful of all antifreeze claims and fearful that anything other than water would harm his engine. That's probably the absolutely worst thing you could do since there is NO protection whatsoever for the system. Once the distilled water contacts the metal of the engine it picks up ions, becomes conductive and the whole argument falls apart. Once its in the engine, its no longer distilled.

Viewed in that context George's comment about distilled water was neither flippant, unreasonable nor required any contortions to be pertinent.

I agree with everything you say, especially with the fact that not using any anti-freeze is probably the worst thing you can do to an engine regardless of what kind of water you put in. I also admit that if Mr. Murphy's comment was intended to mean that the solution will pick up ions and contaminants from the cooling system I'd have to agree with him too, but why start out adding some in the water you use is my question.

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Re: Zerex G-05 vs. the real Mercedes coolant

GeorgeMurphy;127792 wrote:
If you want to use distilled water - no problem - it stops being distilled once you add MB brand antifreeze to it anyway. . .

Another member gave me the backstory offline to this whole "don't use distilled water in your cooling system" argument and explained the context in which Mr. Murphy's above statement makes sense.

The argument was made that using only distilled water with no coolant mixed in was harmful and therefore that practice should be avoided. This, of course is true as is using just tap water without coolant. Coolant does more than lower freezing and raise boiling temperatures as most of us know and apparently in using only water in the cooling system context using distilled water is worse than using tap water and this is apparently where some people took this to mean "don't mix coolant with distilled water" either. That is just wrong though as I have now said many times in this thread.

Mr. Murphy's statement was apparently intended in that context to mean that mixing distilled water with coolant negates any ill effect which would result if just plain distilled water was used of which I'd agree, but without knowing the history of this argument I was puzzled by his statement and the posts of others against using it as the diluting agent in the 50/50 mix. Now I understand where this comes from and would have edited my prior post if I could...but am posting this as a way of at least toning down my prior responses.

I'm sorry again if I came off sounding arrogant or offended anyone but knowing the history and the context is very important in understanding what was meant and I didn't know this when I read these posts, now I do.

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Chuck Landenberger's picture
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Re: Zerex G-05 vs. the real Mercedes coolant

Marty,

Your apology is respectfully accepted and I commend you for stepping up to clear up this "issue".

Too often we get our "knickers in a bind" ... I remember the "old saw" about stopping digging when we get into a hole of our own making....

Again thanks and keep posting.

Have a great holiday season.....

Take care,

Chuck

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Former Forum Administrator & DAL
1983 300CD

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George Murphy's picture
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Re: Zerex G-05 vs. the real Mercedes coolant

Here's some more fuel for the coolant/antifreeze discussion:

From FASP-2007:

The use of aluminum components in Mercedes-
Benz engines requires that anticorrosive/antifreeze
specifically formulated to protect
aluminum parts be used. Failure to use MB
325.0 anticorrosion/antifreeze may result in a
significantly shortened service life. While there
may be a number of products available which
will provide the required protection, not all
such products have been tested for Mercedes-
Benz vehicles. The above product is suitable for
Mercedes-Benz engines and can be mixed with
the original anticorrosion/antifreeze filled in at
the factory.
!
Cooling system design and
anticorrosion/antifreeze agent used
determine the replacement interval for the
coolant solution in your vehicle. Please
observe the replacement intervals specified
in the Maintenance Booklet for your vehicle
model. It assumes the use of MB 325.0
anticorrosion/antifreeze. Failure to use this
antifreeze and/or adhere to the specified
replacement interval may result in a
significantly shortened service life.

The following is quoted from the Mercedes-Benz Service Microfiche System,
Dated 04/93:

"Use water which is clean and not too hard. Drinking water frequently, but
not always, satisfies requirements. The content of dissolved substances in
the water may be of significance for the occurrence of corrosion. If the
water quality is not known, DISTILLED or fully desalinated water should be
used. For water quality see Mercedes-Benz Specifications for Service
Products."

From Mercedes-Benz Specifications for Service Products, Section 310:

Fresh water quality with a coolant composition according to item
(engines for passenger cars and commercial vehicles)

Sum of alkaline earth (water hardness): 0 to 3.6 mmol/l
(0 to 20 degrees d)
pH value at 20 degrees C: 6.5 to 8.5

(GM: Once you add MB antifreeze, pH comes out to about 7.0 to 7.4 in my experience)

Content of chlorine ions: max. 100 mg/l
Total content of chlorides + sulphates: max. 200 mg/l

*Conventional designations for water hardness in various countries:
1 mmol/l = 5.6 degrees d = 10 degrees f = 7.02 degrees e = 100 mg/kg CaCo3 US

d=Germany
f=France
e=England
US=U.S.A.

Y'all enjoy the holidays . . .

__________________

Regards,

George Murphy

MBCA Technical Director

865-482-9175

1999 C43 AMG

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