Not sure what protocol is but there is a leak between the booster and the metal apparatus that holds the reservoir to the booster. Her brake light is coming on and the fluid is near the min mark.

Is this a rebuild or do parts need to be replaced?

Thanks!

Doug

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1981 300TD
2005 C55
2004 E500
1999 ML430
1992 400E
1998 C43
2001 SL500
1988 300SEL
1986 190E 16V
1991 190E 2.6