slave cylinder not bleeding vectra 2.0dti c.class?

I take it you mean your clutch slave cyl.Firstly is there plenty of fluid in the reservoir?Have you tried just opening bleed screw,sometimes gravity does the process for you,if that doesn`t work then have you tried pumping pedal a few times to build up a pedal and open the bleed screw when it is depressed and held down,repeat a few times it sometimes takes a while.In the end it may need a pressure bleeder to assist in drawing through the fluid.

cdc
November 2013