Brake Pedal Lacks Firmness. Not sure what next to do... - PeachParts Mercedes-Benz Forum

MBeige · #1 10-22-2012, 09:19 PM

Have you tried changing the pads to stock compound and see the difference?

What's the condition of the brake booster hose from manifold to booster? Checkvalve still good?

JamesDean · #2 10-22-2012, 10:43 PM

Quote:

Originally Posted by MBeige

Have you tried changing the pads to stock compound and see the difference?

What's the condition of the brake booster hose from manifold to booster? Checkvalve still good?

I was considering doing that. I've got a set of slightly used Textars here. I was a bit learly of using them again but I figure if I sand them down nicely they shouldnt have too much of a problem.

The brake booster hose seems intact.. I would have though any less vacuum to the booster and my brakes would be firm, hard and somewhat ineffective.

I think I'll give the reverse bleeding a try. All my calipers, most of my lines and the master are rather new so there shouldn't be too much crap in there. All the reviews I saw on other forums had high praise for the device/method. So we'll see. Conceptually, it make sense, to me at least.

JohnM. · #3 10-23-2012, 01:42 AM

Another vote for the brake hoses. They can affect pedal feel....

JamesDean · #4 10-23-2012, 08:46 AM

Quote:

Originally Posted by JohnM.

Another vote for the brake hoses. They can affect pedal feel....

They are rather new.

I originally had stainless steel lines on the car then I thought the same thing, maybe the lines have failed somehow and I should replace them. Two of them I installed, and two the shop. There was a good 2 month period between the installation. There was no significantly notable change unfortunately.

Its somewhat difficult to describe the entire problem. The brake DO respond and stop the car. It just seems like

a) there is too much pedal travel to achieve this
b) there is no resistance in the pedal (as compared to my other cars)

So what I am going to do is :
1) Reverse bleed.
2) install used textar pads (lots of life, just need smoothly sanded) if #1 should net nothing as compress ignite believes.

What I wont do:
Throw parts at it by buying another master cylinder or by buying more calipers or brake lines.

So we shall see how 1 and 2 do.

The 300D is nearing completion finally. So the 190E's road days the numbered. It will soon go down for the winter.