Stainless Steel Brake Lines for w123 300d - Mercedes-Benz Forum

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post #1 of 12 (permalink) Old 06-19-2017, 02:00 PM Thread Starter
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Stainless Steel Brake Lines for w123 300d

Hello everyone..

So the next thing I am looking to do is flush the fluid out of the entire braking system as the fluid inside of the master cylinder is a bit dark.

While doing so I would like to replace all the brake lines with stainless steel ones as I always have in the past with all my cars.

My question is whether there is a preferred brand or source that everyone uses?

What is everyone using for fluid? DOT 3 or 4?

Thanks.
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post #2 of 12 (permalink) Old 06-19-2017, 02:56 PM
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Don't know about hard line replacement as the ones on mine are in quite good condition, but all I use is dot 5 synthetic brake fluid in my vehicles.
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post #3 of 12 (permalink) Old 06-19-2017, 02:57 PM Thread Starter
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Originally Posted by kevdupuis View Post
Don't know about hard line replacement as the ones on mine are in quite good condition, but all I use is dot 5 synthetic brake fluid in my vehicles.
Thanks but perhaps I should specify that the lines I am looking to replace would be the rubber hoses attached to the caliper...
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post #4 of 12 (permalink) Old 06-19-2017, 06:58 PM
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To clarify, you mean stainless steel braided lines. They are not wholly made from stainless steel because they need to be flexible.

Some have said the fibers eventually disintegrate over time and may poke into the rubber hose which is inside. Those who installed them said they improve the pedal response/feedback when braking.

When I had my brake fluid replaced, I went with new simple factory/OE lines.

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post #5 of 12 (permalink) Old 06-20-2017, 07:11 AM Thread Starter
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To clarify, you mean stainless steel braided lines. They are not wholly made from stainless steel because they need to be flexible.

Some have said the fibers eventually disintegrate over time and may poke into the rubber hose which is inside. Those who installed them said they improve the pedal response/feedback when braking.

When I had my brake fluid replaced, I went with new simple factory/OE lines.
Yes that is exactly what I mean.

I have always installed stainless braided lines on all my previous cars and motorcycles in the past and have never had any issues with the fibers disintegrating over time..I once went down on my bike on a track day and had the stainless brake lines drag across the track while the bike was down and the lines were still fine..
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post #6 of 12 (permalink) Old 06-22-2017, 11:39 AM
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Replacement flex hoses to the calipers will outlast your ownership assuming you flush the fluid every 2 years as recommended by MB. Stainless hoses on a street car IMO are done more for bragging rights than for any practical reason. Flex hoses are very often overlooked as potential failure points and many many calipers are wrongfully replaced because of internal flaking material in the hose. I give you credit for wanting to replace them.

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post #7 of 12 (permalink) Old 06-22-2017, 11:45 AM Thread Starter
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Replacement flex hoses to the calipers will outlast your ownership assuming you flush the fluid every 2 years as recommended by MB. Stainless hoses on a street car IMO are done more for bragging rights than for any practical reason. Flex hoses are very often overlooked as potential failure points and many many calipers are wrongfully replaced because of internal flaking material in the hose. I give you credit for wanting to replace them.
I totally agree with you on all points however I will argue with you that while stainless braided hoses are indeed overkill on a streetcar I would rather have it that way than the other way around especially since I am going through the efforts of removing and replacing the factory lines..

To each his own on this one...I like overkill as it adds a piece of mind..
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post #8 of 12 (permalink) Old 06-22-2017, 11:10 PM
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The braiding does not reinforce the cables. It only makes inspecting them impossible.
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post #9 of 12 (permalink) Old 06-24-2017, 01:46 PM
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I was thinking the same, and since i swapped to gen2 w126 calipers and had the rears refurbished at two w123s i went with this set.
Goodridge Vint BL SS Brake Hoses fit Mercedes 200/300 (All Models) (W123) 76-85 | eBay

There is other manufacturers/brands, but i read good about these, and i got two sets, and my brother one set, my for w123, his for w201.
it looks good atleast some time (and obviously needs to be cleaned if you want them to shine bright)
But having stainless instead of things rusting felt good, and i imagined they are a bit more durable against external damage, wheelrubbing etc (that happened in the front when running wide tires)
So, ive got three sets from that seller, he have them in different colors aswell as braided non stainless for a bit cheaper.

i cant say that much regarding pedal feel, since i swapped both them and brakes at the same time, but cars with upgraded brakes, al aired out and those are a dream.
its painfully obvious to get back to a "stock" car later on.

ps, i drive my cars on track, or as on a track, so i felt it was justified

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post #10 of 12 (permalink) Old 06-24-2017, 02:27 PM
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Quote:
Originally Posted by kevdupuis View Post
all I use is dot 5 synthetic brake fluid in my vehicles.
All brake fluid are synthetic. Are you using DOT 5 or DOT 5.1?


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