I finally got around to using the vacuum brake breeder on my Mercedes for the first time ever. Everything on the vacuum brake breeder kit works well. However, I have to make sure the vacuum pressure is really working because sometimes there is no pressure on the gauge while pressing the handle and I had to checked the hoses, the o ring inside the cup is tight and no outside air is coming through.

Starting from the right rear brake breeder screw, sure enough air bubbles came through. However, there were no consistent flow of brake fluid coming through the transparent (clear) tube, just sporadic internvals of air bubbles and some short solid brake fluid. Went to the next rear left rear brake breeder screw, same results. Went to the front left brake breeder screw, nothing, no air bubbles or brake fluid showed up. The same thing happened on the right from brake breeder screw as well. How strange!

Afterwards, I started the engine and pressed the brake pedal and good solid traction off the floor approximately 2 to 3 inches. No spongy feeling on the brake pedal. Must be due to the running the engine to build up vaccum, I guessed.

Before any of the above brake bleeding took place and because my Mercedes has ABS and ASR traction, I bled the ABS port first, then proceed the rest on the brake bleeder screws.

I was doing some research on bleeding the brakes that has ABS and ASR traction, I came across this post on the tech forum: Brake bleeder recommendation,
Brake bleeder recommendation


A fellow forum member who stated:


Some cars with ABS can NOT be bled with the vaccum method, and require pressure to bleed properly. I believe this applies to all Mercedes with ABS. There are valves in the system that require pressure to move fluid through them, vacuum won't do it. It does work on most older cars though.
Brake bleeder recommendation. gsxr username 09-15-2003, 10:48 AM on page 2, post #26.

Also, gsxr mentioned this below on page 6, 02-06-2012, 12:17 PM, post #76:


Vacuum bleeders do not work well on newer Mercedes (mid-80's & up) with ABS and definitely not with ASR (traction control). The factory manuals specifiy pressure bleeding or pumping the pedal. Vacuum won't pull the fluid past the system's internal valves. You can use vacuum bleeding on the older brake systems, but even then there is no advantage to vacuum over pressure bleeding.
Brake bleeder recommendation

Interesting comments from the above member gsxr in regarding to brake bleeding using vacuum vs. pressure bleeding, especially when my Mercedes has both ABS and ASR traction.

Since my vacuum brake bleeder is good to have for other vehicle makes and models, (I have a 1992 Toyota pickup and 2000 Kia Sephia, both vehicles will work using the vacuum brake bleeder), I am tempted to go ahead and buy the Motive Products - 0100 European Power Brake Bleeder Kit as shown in Amazon:https://www.amazon.com/dp/B0002KM5L0?tag=best-brake-bleeder-kit-20&th=1&geniuslink=true
My reasoning is I do not feel right about the type of brake bleeding (vacuum) is appropriate for my Mercedes, since the ABS and ASR traction does not help at all, based on the research.
Hopefully, the above particular Motive Products - 0100 European Power Brake Bleeder Kit should fit on my 1994 Mercedes E320 wagon.

I will continue to update on my progress. Any comments, advice, feedback is greatly appreciated. Stay tune and thanks to all for reading and posting comments on this thread.