I did do my research. I think it's pretty obvious that I did. I expected you to do the same before you gave me a incorrect answer. And especially before you give me a follow up answer. Because I did do my research, I can provide you the factory Volvo service buliten regarding the factory camera system if you'd like. I acquired it after your first response that was incorrect. I had several conversations with seasoned certified Volvo technicians after your response. They supplied me with a lot of information.
You said
Blank buttons may not be activated and it's very strange that the blank buttton where the NAV button should be placed works
This is not accurate. Even the manufacturer (Q-dis) of your interface has it in there manual. Would you like me to provide the Q-dis manual?
I'm not here to get into a pissing match. I am more than happy to give you all the information that I have gathered to help you or others that want to install this interface.
I asked my questions here because I assumed you had a direct line to the technicians at the manufacturer to inquire about the full screen rear camera operation as shown in the manuals.
I want to add the Android Navigation module and front camera as well. Should I continue looking here for support or would you rather I go elsewhere?