Bleeding brakes and no fluid from valve - PeachParts Mercedes-Benz Forum

whunter · #1 07-17-2009, 02:55 AM

Quote:

Originally Posted by ah-kay

It happened with my 300SDL on Passenger Rear side.
I asked members here and I was told you need to fill the rear chamber of the reservoir.
I just filled the reservoir all the way to the brim and it solved the problem.
I bled all the brakes then with no issues.

If that does not fix the issue.

Some Facts About Brake Hoses:
#1. The average life of a brake hose is six years.
#2. Brake hoses deteriorate from the inside as well as the outside.
#3. Moisture is absorbed into brake fluid systems through brake hoses.
#4. Contaminants in brake fluid act abrasively on the inner wall of brake hoses.
#5. The brake hose reinforcing fabric deteriorates through expansion and moisture.
#6. High operating temperatures contribute to the deterioration of hoses.
#7. Brake hoses swell with age and restrict flow = no flow to caliper or trapping pressure in the caliper.
#8. Generally all brake hoses on a vehicle deteriorate at the same rate, So all hoses should be replaced if one is found to be faulty!

A failed master cylinder is also possible.

Look at this thread for other potential issues.

Brake:
Brake:

Have a great day.

tobybul · #2 07-17-2009, 09:39 AM

If the reservoir is full, I vote for a bad hose. This also happened to me recently. New hose fixed it.

tangofox007 · #3 07-17-2009, 10:24 AM

Quote:

Originally Posted by whunter

A failed master cylinder is also possible.

Considering that both rear brakes are connected to the same supply line, it would be fairly unlikely that the master cylinder is at fault.

My money is on a dry rear chamber in the reservoir.