Well, I will call Zerex on Tuesday and see about all of this. In the meanwhile, I wanted to share with everyone some of my resource material. The following thread expresses the official opinion of Daimler-Chrysler AG, and Mercedes-Benz North America. http://www.w124performance.com/docs/mb/other/antifreeze_article.pdf

It states that, among other things, that Mercedes Benz only wishes for MB Coolant or an "aftermarket equivelent". Pureflo coolant states on the back that, not only is it a Low Silicate Forumla, that it meets Mercedes Benz Specification DBL7200. I'll admit, I've never heard of it. But, maybe someone else has. Also, the exact wording of the Lubricants and Gasolines Pamphlet that comes with Mercedes' states the following,
"The use of aluminum components in M-B engines requires that the Anti-corrosion/ Antifreeze used be specifically formulated to protect the aluminum parts. Failure to use MB Anti-corrosion / Antifreeze may result in a significantly shortened service life. While there may be a number of products available which will provide the required protection, all such products have not been tested for Mercedes-Benz vehicles. The above product is suitable for our engines and can be mixed with the original Anti-corrosion/ Antifreeze filled in at the factory." Excerpted from Factory Approved Service Products, Copyright Mercedes-Benz of North America, Inc. Service and Parts Literature MBNA/MBC Rev. B (11-89). As best as I know, this has not been materially revised in the last 18 years, so it still stands. MB will not prohibit the use of aftermarket coolants. MB does not say that aftermarket coolants will hurt MB engines, only that they might. MB says that the reason that they don't know is that they haven't tested the aftermarket coolants. IMO, MB don't want to test the coolants. They can convince enough people to buy their product, by creating official doubt on all aftermarket coolants, including G-05. Also, cite the official instruction on the use of a 50/50 mix of MB Coolant and Distilled Water. Very Interesting.
Thanks, God Bless,
Dave.

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