Master cylinder or brake booster
 

OK so I have bled all the calipers. No air or splatter. Still the pedal goes to the floor and no brakes unless I pump them. Is there a way to determine if the problem is the Master Cylinder or the Vacuum assist brake booster? This is on my 240D if that helps. :confused: :(

master cyl or brake booster
 

if you can tell mr why you were bleeding brakes perhaps i can help. david poole dallas tx.

putting new rotors, calipers, pads and all that good business. The car had this problem before I changed the parts. Hoping that would solve it, but it didn't. The master cylinder, resorvoir, and grommets that hold the resorvoir all look good. But looks can be decieving I know. I don't have any vacuum issues so I can't easily say there is a leak there. Hope this helps in helping me.

Answer
 

If there is no fluid loss = Internal master cylinder failure, replace it..

Brake:
http://www.peachparts.com/shopforum/diy-links-parts-category/142411-brake.html


Simply call or e-mail Phil for assistance, he will need your VIN# for this part..
Toll Free 1-888-333-4642 or philip@peachparts.com

Be sure to mention that you are a mercedesshop forum member....:)


Have a great day.:)

Thanks Whunter:D