I just changed the rear brake pads on my 1990 300e,
I bled the driver rear line first and it went well. I than
bled the passenger rear and thats where it all went
bad. At first I was getting a lot of air and fluid mix
than just air and now nothing. I even removed the
line from the caliper and tried to see if any fluid would
come out and...nothing. I than bled the fronts to see if
everything was working up there and they bled fine.
Is there any reset I have to do or any thing that
would prevent fluid from getting to the back lines?
The brakes worked perfect prior to this, I was doing
regular maintenance. Please please help.

Also I tried driving the car without back brakes
and the fronts worked perfect. I did lock up the front brakes
while driving, so does that mean the abs isn't working or has to be reset?