I tried the motive brake bleeder just now.

I checked for leaks by pumping up the air to 10 psi like it says. It was fine. I loaded up 2 litres of brake fluid (which is too much for a benz, you barely need 1 litre. I screwed the adapter onto the master cylinder reservoir. It was a little hard getting it screwed on. I think that there should be a gasket between the adapter and reservoir, but there isnt, just a hard seal made by the plastic pieces mating.

A started to bleed the brakes, and it took a while for the fluid to purge the right rear caliper, but after that, then the rest weren't too bad.

Detaching the the brake bleeder from the reservoir was the tricky part because there was so much fluid left it was difficult to let the fluid flow out the left front caliper. I pinched off the line, with line pilers courtesy of snap on, then, I bled the fluid down to an acceptable level in the brake reservoir by pumping the pedal like I usually do.

Overall perfomance, good for someone that uses it once a year. I think that Id want something where I can bleed off the excess fluid easier. I wish there was a gasket between the adapter and the reservoir.

It seemed good for $50.

Thanks,

__________________
Current Stable:
1994 S500 v140, 210k miles, white with grey.

Former Mercedes in the Stable:
1983 300CD Turbo diesel 515k mi sold (rumor has it, that it has 750k miles on it now)
1984 300CD Turbo Diesel 150 k mi sold
1982 300D Turbo Diesel 225 sold
1987 300D Turbo Diesel 255k mi sold
1988 300 CE AMG Hammer 15k mi sold
1986 "300E" Amg Hammer 88k mi sold (it was really a 200, not even an E (124.020)
1992 500E 156k mi sold
etc.