You are correct....The clutch and brakes share the same supply. The brakes
wont be affected so long as the fluid remains above the min. mark on the
side of the tank. Unfortunately the fluid will drain quickly if you pump
the clutch peddal. Top up with fluid and have someone press the peddal (
slowly!!.... ideally while you are wearing safety specs) while you are
looking at the slave cylinder and try and work out where the fluid is
comming from. It could be the hydraulic pipe joint on the top side of the
cylinder or it could be the cylinder itself. If it's the metal pipe then
have one made up at an auto shop as VW don't do them anymore.

Martin 82

>>>It appears that I have a leak in my clutch's hydraulic
line.  My clutch pedal lost its resistance and went
all the way to the floor, and engaging into gear was
very difficult (multi-pumping of the clutch pedal to
build up the pressure).