My phone updates on the fly, I sell BMW's used so its not from lack of how to use it. In fact thats how you sell that car with I drive is showing them how it works. I dont like the setup, interface, or the way it looks on the car. My opinion and from my choice of the car I bought I dont have it in my E92.
As for resale, it adds a marginal value, what it really adds is allowance for financing. When we look at trades your looking at a few hundred bucks in terms of return in the grand scheme.
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