With professional this module should will work. Of course everything should be coded to your car if you want to do it right.
This module should work normal with Busines radio only without noise, so something is wrong.
You can buy proper one for busines and it will work normal. Coding should be done. PDC is the same for many models, so you should code it.
Module for Business will also work with other unit, after coding. It is universal.
Before buying used one always take a look on mainboard. If it is oxidize do not buy. You can easy take mainboard out of case.