[Jimmy-F46 M-sport]

Hi all,

Just bought a rather lovely 2013 320i m sport (brembos, 19's & zenons) it has a professional head unit but no sat navy and from what I can gather ( I have tried the search function) basic Bluetooth not extended Bluetooth, what I want to know is how the bloody hell can I get my iphone 7 to play music through the head unit??? I have tried a USB cable just comes up in grey not supported and I've tried the aux lead, just sounds terrible (very tinny sound no bass)

Any ideas in laimens terms would be great