we always had good luck bleeding the air out of a brake system by slightly loosening the nipple at the caliper, fitting a hose over the nipple that is attached to an oil squirt gun filled with brake fluid and pumping away until no air bubbles appear in the reservoir anymore. no peddle pumping needed. this system has never let me down even on some big complicated stuff. haven't tried it on a mb but can't imagine that it wouldn't work

thanks, hunt