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The MB type fluid is supposed to be the same as Zerex G-05. I found this 1/2 the price of MB at O'reilly's.
There has been a lot of speculation and opinion that non-MB fluid deteriorates plastic, notably the plastic neck of radiators. I have never seen this proven, there are a lot of plastic parts in engines and on radiators of cars with ordinary radiator fluid from the factory, and I think the real reason that radiator necks break on 107's and the like is a combination of a short, tight upper hose and bad motor mounts.
Just my observation, but the MB/Zerex type fluid seems to contain quite a bit of "salts" that may (may) plug up pinhole leaks. It really cakes up on leaks.
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