So what does it do? Why do you need to adjust the headlights from inside???
If the car isn't level - e.g. loaded heavily, you can correct the beam to avoid blinding other drivers or point the beam down when in a queue of cars etc. All cars here (and Europe?) come with this, unless equipped with Xenon bulbs.
To boost the heater when, e.g. sitting in the car with the engine at idle in freezing conditions. I think it is a diesel thing.Also, why would you need to idle up the engine? Is that a diesel thing?