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OE coolant for M-B cars and other that use G-05 Zerez coolant. This anticorrosion antifreeze/Agent is especially important in cars with iron blocks and aluminum heads. Sold in gallons, undiluted. M-B recommends 50% dilution with distilled water.
This is the correct replacement coolant for vehicles that originally had yellow tinted coolent. This is compatible with and can be mixed with the yellow coolant, e.g. toppig off a system with blue coolant that already has yellow coolant in it will not create problems.