Radiator Bleeding - E46 320d

Hi all

Does anyone have some tips on how to bleed the cooling system on the 320d E46? I decided to change coolant and in hindsight I didn't refill water properly. After reading up on now to do it properly still not coming right. The coolant light will go one and when I open expansion tank the level is low. If I open a bleed screw then the water level rises back to normal.

Tried to bleed it about 5 times now but still the same. Any tips will be appreciated.

Thanks


Sent from my iPhone using Tapatalk