читаем внимательно инструкцию:
Vehicles with discharge headlamps
This mechanism automatically adjusts the direction of the
headlamps (beam position) depending on changes in the condition
of the vehicle, such as the number of occupants or luggage
weight. When the headlamps are illuminated with the ignition
switch in the “ON” position, the beam position of the headlamps
is automatically adjusted when the vehicle is stopped.
...
В общем, автоматическая регулировка происходит во время остановки или стоянки машины 