I guess this is the eye rolling topic, but I have a 2003 Alphard, Japanese head unit etc. Can’t afford a bells and whistles thing and I don’t have the cameras etc. so not bothered about all of that. I’ve been using a cheap Bluetooth speaker for nigh two years so anything’s a bonus. 
There’s no aux input on the head unit but is there any way of connecting a Bluetooth adapter to the unit? Not optimistic but worth asking. 

Yeah, someone did this on here recently, bought some sort of Kenwood unit for £80, gives dab radio through the standard unit + Bluetooth etc. I wish I’d done that before embarking on my install, which is neat and

works but cost a lot more !!