If you like to flush your brake system regularly, you might want to try something like these,

http://www.speedbleeder.com/

I've no experience with them but they look cool.

I do have this and it actually works,

http://www.aep.bigstep.com/eezibleed1.htm

and following a link on that page I found this,

http://www.bmw-m.net/TechProc/bleeder.htm


HTH
Michael

__________________
Usta haves '69 250/8, '76 280C, 1971 250C 114.023, 1976 450SEL 116.033
Current have, 1983 300SD 126.120