[gixer mark]

hi
looking at a low milage Rdesign 2013 d4 but it does not have bluetooth or usb but has an aux socket

so how can i add the usb and bluetooth for a phone
i can buy the soket and fit or do i need volvo to code in

for the phone is there a module you have to purchase iv seen lots of head untits and switch fonts on ebay but dont want ot purchase if i fithelp the new parts and they dont work

any help will be apresiated as not much info on google

wire connections to the head unit would be usefull as well

thanks mark