Bleeding E53 ABS/DSC help needed

[FourPointEight-is]

Hi,

I've got air in my system after replacing the brake booster.

I tried it the "normal" way (pressing the pedal like 5 times, holding it down, opening the bleed screw, let the air bubbles out, close bleed screw - repeat until no ubbles) but obviously there is air in the abs/dsc system and I can't seem to get it to bleed out.

Unfortunately my copy of INPA (v5.0) didn't originally have E53 - it was missing. So I edited INPA.ini and now I can see E53 in the INPA menu. When I press F3 for E53, I can communicate with the DME/Read fault codes etc but when I go to "Chassis" and cycle through all the available DSC options, none of them work.

Is there any way I can do this without the correct software? Perhaps a reasonably priced scan tool.

Alternatively, can someone link me to an older version of INPA that they know works with E53 properly?

I also have ISTA-P but that doesn't seem to communicate with my E53 at all! But it does work with my E82.