Might also check speedbleeder.com. They sell a bleeder screw with a ball check valve that, when you crack the screw half a turn, release brake fluid / air when pedal is depressed. When pedal is released, the check valve closes so no air reenters the system. I put them on all 4 corners when I did mine, and they work great. You can put a piece of tubing (which they sell) over the screw to direct the fluid to a container for collection. I turned the bottle of brake fluid upside down in the reservoir (with a towel around the reservoir while flipping it over) and it worked like a bottled water machine. As I pumped the brakes and the fluid in the reservoir dropped, fluid from the bottle filled it back up to the correct level without overflowing.
1990 300E 125k Miles
1994 S420 100k Miles