My brake fluid reservoir is at the max! And I can see it's reddish. It's definitely was the color of my generic Prestone coolant which suits the car just fine.

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2003 X5 3.0i Silver (build 07/03)
2006 X5 3.0i Blue
1977 Ferrari 308 GTB
1994 Ferrari 348TS Speciale #14/15
1989 Ferrari Testarossa