brake fluid spot




I read through @konigstiger's WIS procedure... this doc may be of particular interest to you:
Topical note on externally invisible brake fluid loss AH42.10-P-9406-02A
hopefully MC will be the fix 🤞




First update, they must have changed the air/water duct, between the '12 and '13 model years, my '12 has the partitioned duct that can be removed without removing the whole water duct and the wipers, my '13 does not so I guess I will be removing the wiper arms and the water/ air duct completely like the instructions for the 207 series.
Last edited by pierrejoliat; Sep 9, 2022 at 04:58 PM. Reason: Update




I am adding 4 documents linked/mentioned there at the main document from Mr K.
Hope your mystery solved





Update; the little clip on the bottom of the wiper arm just removes the plastic cover all the way to the first joint in the wiper arm, I stand corrected, LOL
Last edited by pierrejoliat; Sep 13, 2022 at 05:37 PM. Reason: incorrect









decision criteria
Pierre, heaven forbids your booster was out drinking your DOT4 fluid 🤞
If booster has held more than 100cm3 then it may need the repair of related parts above.
Document says "extract fluid only while booster is installed" - Not saying WHY installed or HOW to do so... I figured a vacuum extractor.
Last edited by CaliBenzDriver; Sep 10, 2022 at 04:03 PM.




The Best of Mercedes & AMG
I THINK YOU HAVE GOTTEN OVER YOUR HEAD ON THIS AUTOMOBILE? Hope I am wrong? GOOD LUCK>




I THINK YOU HAVE GOTTEN OVER YOUR HEAD ON THIS AUTOMOBILE? Hope I am wrong? GOOD LUCK>

I THINK YOU HAVE GOTTEN OVER YOUR HEAD ON THIS AUTOMOBILE? Hope I am wrong? GOOD LUCK>





I THINK YOU HAVE GOTTEN OVER YOUR HEAD ON THIS AUTOMOBILE? Hope I am wrong? GOOD LUCK>
Fewer ill-thought opinions, more reading, newbie.
Last edited by DFWdude; Sep 11, 2022 at 11:32 AM.




I THINK YOU HAVE GOTTEN OVER YOUR HEAD ON THIS AUTOMOBILE? Hope I am wrong? GOOD LUCK>

So very sorry guys.....I did not know BRILLIANT SILVER METALLIC paint can make me sick




Hopefully!




2¢ you may want to concider... is finish the first job completely before tackling phase II.
This way you know where you stand with bleeding air out. Right now you have minimal wheel bubles, so you can bleed MC until the pedal feels firm the way you like it.
If you get air everwhere... it will be harder to bleed the last bubles not knowing what end it's in....





I did small 8mm OD I believe it was 1.2mm thick 400 BAR Sandvik stainless steel pipe/tube bending for my dive compressor extra standalone big filter towers, but never something so long and many bends like a car brake line.
It is no fun to work with such thick stainless steel tube of such quality.
All Swagelok tube fittings I use, its double ferrule fitting is INSANELY awesome !!! German dive compressor ( Bauer ) like to use Voss single ferrule, it is garbage. I hope MB doesn't use such poor quality ferrule.
There is a bend + distance formula for each tube size.
https://www.swagelok.com/downloads/w...n/MS-13-66.PDF
I got it wrong a few times at first.... LOL.
Hope you get all sorted out yah and becareful being under the car that long.




Yes Cali, I finished up under the hood first, new MC and reservoir are in and everything's back in place, pulling the lines through the frame channels was a B****, but I'm past that now, thank G*d. So far I'm nine hours of labor, but parts are 250 for the MC and 120 dollars for lines and fittings.
Last edited by pierrejoliat; Sep 22, 2022 at 08:55 AM. Reason: changed over to around




What section did you find the most rusted line ??
Are you going to protect your new lines at all?
You know how heavy moisture travels down to the wheel pistons by gravity... I was wondering if plumbing a "dirty-leg trap" on a T could simply eliminate that issue ?
🤞
Last edited by CaliBenzDriver; Sep 20, 2022 at 12:20 PM.




What section did you find the most rusted line ??
Are you going to protect your new lines at all?
You know how heavy moisture travels down to the wheel pistons by gravity... I was wondering if plumbing a "dirty-leg trap" on a T could simply eliminate that issue ?
🤞
Last edited by pierrejoliat; Sep 20, 2022 at 06:43 PM.




loosing the fluid is not the problem, the air into the brake system was massive.

Below is the correct placement and the plug won't slip.... ( LEFT FRONT CALIPER )
That black square holder has a hole, so the blue* plug ( *from MitiVac Vacuum/Presure Kit ) has a lip and it will get "locked" by the hole and all good.
This is how the blue plug looks like
The holder has a metal insert hole/round shape to lock the flexible hose end fitting of the brake hose, as below. The hose end has 2 locking barb/protrusion.
I think to maximize air bleeding later, you can try what I did today Pierre. But it is slow though.
I made the hose and the small catch bottle higher than the brake fluid reservoir. I use the Mitivac vacuum hand pump.
This save lots of brake fluids.
Okey dokey....... dont tire yourself too much yah. Take it easy....




I think the bleeding will go well and look forward to getting the car off the jack stands and floor jacks, wheels on and get my wife out of my car, LOL. I bought two Liters of Dot 4+ so should have enough.
So just to recap, MC was leaking, but only under brake pressure, which is why it could sit without leaking for days at a time, the leak was so small and brake fluid so clear and thin that the booster did not look wet, it was not obvious at all and as earlier mentioned had no signs of malfunction, there was no fluid in brake booster, I lucked out there! I will update after the bleeding process and first ride around the block.
Also; I might suggest not doing this job on a garage floor or lift quite frankly if yo are as old as I am, I had plenty of room and a creeper to get around on, but I hurt all over! Also I want to thank all of you for your expertise and moral support, couldn't of done it without you!!!! And to Toledo Tom. thanks as well, without your comments I might have given up and taken it to my Indy, instead I saved like TWO GRAND in labor. Cheers



