I read the 42-0010 brake bleeding instructions from the CD-ROM. I was just wondering if any of these aftermarket brake bleeders can be used, or if anyone can recommend any particular one? My car has ABS, but not ASR - 86/300E.

What I want to do is replace the brake booster as it is making hissing noises now and then when we apply the brakes. I am also sure this is the culprit for the vacuum leak we are experiencing (economy meter doesn't go fully into the black zone when idling).

Should I replace any other items while in there? I read something about replacing the master cylinder seal towards the brake booster. I couldn't find the partnumber for this one though.

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99 W210 E220 cdi sedan automatic (248.000 km) 210.006

Power bleeder for less than $50 works perfect. Become a one person job. www.motiveproducts.com

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98 E430(sport), 99 ML 320 (sold) , 05 C 230(sport) Mark

I bought a Speedi-Bleed for this purpose and have used it successfully for the past 5 yrs. Fluid gets flushed annually. The product seems to get all of the air out and I end up with a firm brake pedal each time.

There are all sorts of gadgets such as this one out there. Mine has a line that connects to the spare tire. The other end of the line connects to a special cap that screws on to the brake fluid reservoir. You pour a qt. of Dot-4 or whatever you like in a plastic container, then open a valve to create pressure that flows the brake fluid. The 4 bleeders screw must be opened of course.

Some members here have posted instructions for going the home-made route if you're so inclined.

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Mike Murrell
1991 300-SEL - Model 126
M103 - SOHC
"Fräulein"

Thanks both of you.
I'll see if I can pick one up tomorrow at a store.
Considering getting a new vacuum pipe/hose for the new brake booster too to make sure everything is tip-top.

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99 W210 E220 cdi sedan automatic (248.000 km) 210.006

I use the motive prouducts bleeder with excellent results

I've been using a Vacula for 10+ years. Quality unit, no problems, easy and neat to use.
A bit pricey though, and requires an air compressor.
This works by applying vacuum on the bleeder end, instead of pressure on the reservoir side.

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1986 300E 5-Speed 240k mi.

I have also been using the Speedi-Bleed brake bleeder for quite a few years. After 25 years of being the brake guy for family and friends, and trying every method of brake bleeding, and many different tools, this is now my favorite. You can read more about it at http://www.speedibleed.com

On my old 190E, the master cylinder seals were rotted after 12 years. I replaced the whole master cylinder.