[Outack]

This afternoon I did a full flush of my brake system in my ‘20 m340. All went well, no bubbles, full flush using the Motive pressure bleeder.

However, now that I finished the pedal is incredibly soft, goes all of the way to the floor under light pressure. The reservoir is filled to the Max line.

Now, the pedal will firm up briefly if I pump it a number of times, but will immediately go soft. It is not drivable in the current state.

What’s next? I am assuming that there is air somewhere, but none comes out with any bleeding.

Do I need to tow it to a shop?

[cyam]

I'm not sure about this car, but is there a bleed screw on the master cylinder? I had this issue with my Alfa 159 and had to bleed the master cylinder.

I have the same car as you but so far dealership has done all my brake flushes at no charge.