Hi, These clutches are hard to bleed at the best of times, but I will give you a few points and see how you go.
you can use a pressure or a vaccum bleeding system,but the trick is to open the bleed srcew very slowly.
if you are going to do it manualy then have two people, you will need to have a hose and bottle attached to the bleed screw ( to catch fluid and stop air getting into the system) Have your assistant pump the clutch pedal up and down ten times and hold it down (you may have to use your hand so it will come back up at the start) Then very slowly open the bleed screwand let a small amount of fluid out ( don't wait with the bleed screw open until the fluid stops running).
Repeat this until clutch pedal is good, you will go through alot of fluid.
Hope this helps, Good luck
BMW Technician
18 yrs as an auto technician 8 yrs with BMW,In England, Australia and New Zealand. Part Time tutor