If I remember correctly, MB recommends to cover breather hole on cam cover, vacuum pump, and brake master cylinder of 1992 300D during engine detailing.

However, I forgot to cover the vacuum pump and the brake master cylinder, and sprayed water there at coin car wash - fortunately, it was not the full pressure -.
Did I put water into the brake system and vacuum system? Should I replace brake fluid soon?

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1992 300D 2.5 turbo diesel. 319 k miles.
124.128 chassis, 602.962 engine, 722.418 tranny.