DAB+ on 2011 W221 COMAND APS NTG 3.5?

[Slartibartfast]

I have a 2011 S-Class W221 (S350L) which has COMAND APS NTG 3.5 (with DAB). I've been unsuccessfully trying to tune into a fairly new radio station: Boom Radio. When I googled it I read that it only transmits on DAB+ and not DAB.

Is there an easy and inexpensive way for me to get DAB+ on this system? If not then I will just play it through Alexa. Just wondering.

Many thanks.