Lizem,
2 pints should be enough, take the brake reservoir off replace the rubber seals and clean out the reservoir. Then fill up the reservoir and bleed out each wheel till it nice and clear and no bubbles. I use Castrol brake fluid.
m

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Martin Ingram
Colorado Springs
2005 320 CDI
2006.5 VW Jetta TDI
1991 560SEL (179000 Sold)
1972 280SEL 4.5 ('The Lead Sled' 320000 miles when sold.)
1972 220D (225000 when sold)