I thought long and hard about including Nav in an order. But I decided against it because of the way I use a Nav system. Most of the daily travel doesn't require Nav - but when I need it, it's because I have a complex route laid out. I drive from Point A to Point Z with a whole bunch of waypoints in between - which the Nav has to account for. And the internal Nav can't do waypoints. I have to get an aftermarket unit for that.
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