Correct, and because it is brake fluid, the diaphragm in the booster is likely toast, and the casing will rust horribly quick, because it's eaten any and all coating inside. The attached master cylinder however, I suspect can be rebuilt, but it's probably cheaper to find another used one.

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RIP: 80 300SD
RIP: 79 450SEL
2002 E430 4matic (212,000km)
2002 ML500 'sport'

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