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Where do you get one of the cords? It's for 2011 GS to make the Nav input while driving.
I know that this is a great solution, but I personally have all my road trip destinations, and potential hotels, restaurants etc all inputted into the memory points and listed by distance, so wherever I am on the road, I can access the memory points and input those while driving.
Granted, not everyone plans their route as I do, but one can also use the POI's, when driving. Once you select a POI on screen, you can input those while driving as well.