For version 188.8.131.520 it is and actually works and also shows slider in settings. But for 184.108.40.2060 setting is, works also but no slider in settings...
2016 White 1.6 dCi 4WD BOSE with Premium Techno Pack, Winter Pack, Panoramic glass roof & autodipp mirror and retractable towbar.
R-Link2 V1 upgraded to 220.127.116.111, Boot version 4992, enabled Android Auto
Maps: Here 2018.3
It was never a feature on the bose edition however it can be activated through the developers menu, if you can get in it.
The other way is to use ddt4all, free software and an elm, loads of other stuff to fiddle with also turned alsorts on on mine.