Dbking

Need expert oponion solving a mysteries issue with my E350 brake.

A few days after my rear brake pads were changed by my MB certified mechanic, all the brake guilds were leaked from somewhere close to the right rear tire. Took the car to my mechanic who changed many parts, including pump, calipers, ... they still could not bleed the brakes. Car was taken to the MB dealership in Plano Texas. After 2 weeks, dealership gave up too.

Now it is about 2 months that this car, with 60,000 miles on it, is worked on by MB experts for a simple brake job. Your advise in solving this mystery is appreciated.

NewShockerGuy

So they changed the calipers and they still can not bleed the brakes?! More info is needed.

Is fluid not coming out of the bleeder screw, is the system pressurized to 2 bar per MB workshop? IE: You need to pressurize the brake reservoir to about 29psi, crack open the rear passenger bleeder screw, and have someone pushing down on the brake pedal. If that doesn't work then there is something else going on. When doing the above method make sure that the reservoir does not run dry.


-Nigel

kjb55

Once pressurized - you shouldn't need to press the brake pedal. I think you have a clogged line. Drain the system, use compressed air to push it through.

Dbking

Thank you for your response. I will share your recommendation with my mechanic, hopefully it will help them figure things out.

Dbking

It could very well be the case that something is clogging the line, because they have already changed almost all the parts.