![]() This means buying an (expensive) dodgy map pin from some hacker on the internet each time you need to update the maps. This means that the start-up will not update Mercedes database and you will not be able to generate a map pin for the map. If your car should have NTG4.5 and you have an Audio-20, and you follow the proper procedures to do a retrofit but try using a 4.7 unit it won't work as the start-up procedure will know its not meant to have 4.7. ![]() ![]() As the map pin code algorithm is same for NTG4.5 and NTG4.7 it will still be possible for Mercedes to generate the pin codes for new maps. It is possible to replace a Comand 4.5 unit with a Comand 4.7 unit and code everything by hand to make it work, but pretty sure you can't SCN code it (to get config perfect) because the SCN coding will say that control unit isn't valid for that car. Not, you can't upgrade firmware yourself, has to be done with online Xentry which means Mercedes dealer or very specialist independent like Mercedes Retrofit Specialist - .uk So, upgrading your 4.5 to the latest firmware won't make iPhone work. I don't know exactly what, but i'd suspect the bluetooth chipset is different at least. If your car should have NTG4.5 and you have an Audio-20, and you follow the proper procedures to do a retrofit but try using a 4.7 unit it won't work as the start-up procedure will know its not meant to have. 4.7 (the one that supports Bluetooth PAN, i.e iPhone) is different hardware to the 4.5. As the map pin code algorithm is same for NTG4.5 and NTG4.7 it will still be possible for Mercedes to generate the pin codes for new maps. ![]()
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