Adjustable headlight option allows the headlights to be tipped lower - 3 settings - 0 (no tipping) for driver and one passenger, 1 (a little tipping) for driver, passenger and some luggage, 2 (more tipping) for driver, passenger, back seat people and perhaps some luggage. This is to put the main beams down some when weight is added to the rear of the car so you are not blinding oncoming traffic.
This is implemented by motorized plates to which the headlights mount and a rotary switch in the console such that the side of the knob rises out of the console (similar to the dashlight brightness control) with three markings. When the rotary knob is operated the headlights tilt down.
An elegant solution but one that limits your options when upgrading lighting as the headlight bodies that go along with this have three substantial metal tabs integrated with the body that use specific nylon adapters to fix them to the adjusting screws - one of which is the stepper motor that provides the adjust-ability.