2011 q7 mmi 3G low - ami/carplay

[sparsons]

Good evening all. 
 

I have just purchased a 2011 sline q7. Much to my surprise it doesn’t have aux or usb connectivity. It does have a cd changer in the armrest and a couple of sd slots but that’s about it. 
 

it’s the BNav version. 
 

does anyone have any suggestions for me to get usb at the very least? I’ve seen the cheap car play units on e bay but not sure if they will work as I do not have aux. 
is it possible to remove the cd changer and replace with usb??

 

any help or suggestions very gratefully received 

 

than

[Steve Q]

Found this which might be useful with some links: 

https://www.audiworld.com/forums/a6-c7-platform-discussion-194/adding-oem-usb-ports-2898055/ 

https://www.advanced-incar.co.uk/products/audi-retrofits/audi-ami-retrofit-mmi-3g/