How do I bleed the clutch on a 2002 Renault Laguna?

I am replacing the clutch master cylinder as you can pump the pedal up. The slave is inside the bell housing - so going with the master first!
There is one plastic bleed nipple near the bell housing, but no obvious way of opening it.
Does anyone know how to bleed the clutch please?
Richard, July 2005


done
i changed a clutch slave on a laguna 2002 i but wen i pump the clutch it leaks fro the slave and plastic bleed nipple assembly seal why

john, February 2010
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