how do i replace my slave cylender n master on my audi a4 6 speed 2004 sedan

i found that the break fluid is empty !

SO did you find the source of the LEAK , is what I'm asking?

no i did not how i was thinkin if i kept it running empty it'd prolly make it worse how to trouble shoot break leak?

put fluid in and have someone observe while pumping clutch pedal by hand.