Hill Hold Assist on A4/B9

Hey guys,

Does anyone know how to activate Hill Hold Assist on an A4/B9 without the use of the button next to the parking brake knob?
I don't have the option (forgot to order it) but I assume it's just a button that triggers something in the boardcomputer. I'd like to activate that. And I don't mind if it's always on. In my previous car, a Passat CC, I had this button but it was always on anyway.

Thx,
JST

I'm not sure of the newer A4, but the B8 has a different ABS module - one that can create controlled pressure in the solenoid chambers as well as release it.

Always on is a problem too, I'd like that on mine (that has factory HHA) but I've yet to find a coding or adaptation channel to effect it.