Hello, I have a question regarding this retrofit upgrade to BNS 5.0, I have successfully installed, also I was added GPS antenna from aliexpress. But I don't coding anything, BNS 5.0 still working I don't have maps for my country and I don't have tested navigation yet. If I need something to change and coding with my VCDS, please help me. Car is Audi A3 8p 2009 Sportback I have MFSW I don't have a telephone, maybe I will upgrade but I must find that and still does know which part I need to do that. I don't have a cd changer Also if anyone knows how to make a cd with maps for this unit, that would mean a lot to me.