Bleeding ABS unit

[spock500]

Hi all,

Had to fit a new calliper and piping to the front offside on my C250D so have bled all four corners with an Ezie bleed system.

Brakes are still a bit spongy but peddle doesnt drift down beyond the spongyness so looks as though there maybe air still trapped.

A buddy came over yesterday and mentioned the ABS unit may need doing also?

Anyone have any experience on what to do?

 

[johnsco]

Modern cars with ABS never seem to have that same "hardness of the pedal" that old simple braking systems used to have.
If you go round most systems (all 4 wheels) a couple of times, I've usually found it to be ok.
I fitted a front and a rear caliper to my type 126 (with ABS) and normal 4-corner bleeding sorted it OK.
I've recently bled one of the E300TDs, and had no reason to feel that it wasn't flushing the whole system.

Cheers.
Johnsco

 

[normanr]

Here is a link regards airlocks in the ABS system
Bleeding/Flushing ABS system - Benzworld.org - Mercedes-Benz Discussion Forum

 

[johnsco]

I always bleed by pressing the pedal, so the pressure is from the master cylinder downwards.

Johnsco

 

[spock500]

Cheers all for the replies, will give it a go at the weekend and post back

 

[lil.smartie]

We find that often we need to use diagnostics to run the ABS pump to clear it of the old fluid properly.

Kate