I also read a BMW page. Brake bleeders come up every couple of months. This is a parts list a DIY model. Gets rave reveiws, haven't built one yet but it's on the short list.

ACE 1/2 gallon pump ump sprayer #74497 $10
> GM Master Cylinder Cap (says you can use HELP! # 42035 w/ RTV in the groove $5
> underneath)
> 1/4" hose fitting with threaded base, associated nut, and a washer for the
> top. $3
> Six feet of 1/4" I.D. poly hose.
>
> Proper pressure=15-20 psi, $3 pressure gauge at ACE
>
> Says to put the hose fitting in the mc cap, whose underside groove you have
> filled with RTV, then connect hose to sprayer bottle, fill w/ 1-2L brake
> fluid, voila.