Navigation (NBT) retrofit?

Hi,



I will taking delivery of my M235i in a couple months. When I ordered it, I already had plans of retrofitting the NBT nav.



With that being said, I have spent several hours researching what is required to complete this retrofit and to say the least, the info I have seen is somewhat scattered and conflicting.



It seems like most if not all of the hardware is readily available to perform the retro but what I am unsure of is what is exactly needed in different scenarios. For example:



- What would be needed to complete the retrofit if I purchased the NBT head unit, screen, touch pad controller, and the activation emulator box? Would I need to do any further coding with the use of the emulator? Do I need to add any other cables or a GPS receiver?



- Same question as above but if I don't purchase and install the activation emulator, can I code everything else that the emulator does?



- Will the standard idrive controller from a non nav(tech package) M235i work with the NBT nav after it has been retrofitted or does it require an idrive controller from a nav equipped car?



I really just need some clarification on what hardware/coding is "needed" and what "can" be used in its place with and without using the activation emulator. If it helps, my car will be built with the following packages:



- Premium

- Park assist

- Auto high beams

- Heated front seats



Any and all help will be greatly appreciated. Thanks in advance!!



-Nick