Where a headlamp providing a passing beam and a headlamp providing a driving beam, each equipped with its own filament lamp(s), gas-discharge light source or LED module(s), are assembled to form a composite unit the adjusting device shall enable each optical system individually to be duly adjusted.
Where a headlamp providing a passing beam and a headlamp providing a driving beam, each equipped with its own filament lamp(s), gas-discharge light source or LED module(s), are assembled to form a composite unit the adjusting device shall enable each optical system individually to be duly adjusted.