Sorry I've not replied in a few days, havent been in front of a Pc that much..
Alright.
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Jimmy,
How old are yours?
Are they "Rubber" or Stain-Less Steel braid with a Teflon inner liner?
When you step on the brake pedal with the engine running ,do the Brake Hoses
"Bulge" visibly?
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My lines are in fact stainless steel. Here is a Pic of the front setup. Its a bit dirty/rusty up there..I do live in the rustbelt after all...that pic was from 3/2009 when I put new rotors/pads on...
As to the "bulge" visible..I'll have to get back to you on that...
http://i98.photobucket.com/albums/l250/MafiaNicky/IMG_9005-1.jpg
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Have you properly bedded in the new pads? Your symptoms suggest you have not.
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What does that mean exactly? I've not heard of that before...maybe that is the cause...
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What started the problem?
I'm confused. What work was done that started the problem? Did you begin to feel mushiness/travel and decided to change the fluid, or some repair that then resulted in mushiness/travel? Or a preference for the firm feel in the 300SD? You say it's been mushy since '07?
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I do have a preference for the firm feel of the SD...It has been mushy since the master cylinder was replaced in 07...
A combination of loud squaling from the pads and the fact that I had a set of brand new textar pads on my shelf has motivated me to actually fix the problem or atleast conduct research into it.
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Can you clarify your system - the car is a 190E 2.6 or 3.0? The MC is from a 500E, the front calipers are from an E420 and the rears are from an SL600? And you've got stainless lines on it? And you've pumped 'quarts' of fresh fluid through it?
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the car is a 190E 2.6 with a 3.0L m103 in it. The 2.6 blew its head gasket at 215k and it was cheaper to drop in a 3L than to fix the 2.6
MC=500E
FRONT=E430
REAR=SL600
Stainless Lines
When I did the work in March I did pump a few quarts of Typ 200 fluid though it..almost 3 when I ended the process...
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But - if I understand your system correctly and the symptoms have been around since '07 - I'd guess that the mixing of components has a lot to do with the lack of feel and pedal travel. You may simply need 1/2 travel to pump enough fluid through the calipers to engage the brakes.
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When I first bought the car in 2006 the brakes were nice and firm and it was the setup as I've described above, I didn't change anything with the exception of installing the 500E master cylinder....
THe pedal seems to get hard at time and apply the brakes high in the stroke real firmly and other times it'll get soft and I'll need to drop it down low to really apply them to stop..
Question: The check valve on the booster vac line..what are symptoms that it has gone bad? what exactly does it do?
-Thanks
Kris