you should set the DC charger destination, then select "find a charger nearby", it'll give you a list and from that list select the charger. and confirm you want to add it to your trip.
your final destination should also be known by the Nav.
i would rather say that the temperature management is different, but not by much.
Below a comparison between 2 trips, one under Sport+ , one with Range mode. 2 hrs drive on highway, at a constant speed around 70/75 mph, with a quite similar outside temperature (3 ° / 5°), and no Navigation in...