It looks like regular 4 motion models can disable it too. I have seen a picture of a dash of a 1.6 TDI 4mo that was showing stability control deactivated.
Even if it is possible, I cant see Ross-Tech documenting it as you would be messing with a safety device. Only way to find out would be to compare the coding and adaptions with a 4mo model. Even then the 4wd cars might have a different ABS module to enable it.