Motor vehicle headlamp capable of performing at least two functions

The motor vehicle headlamp has a reflector (R) oriented along the vehicle longitudinal axis and a lamp (S) adjacent to the focus of the reflector. A filter (1) can move between a retracted position and an active position in which it engages at least part of a beam. The filter has an actuator (D) for its movement, and is a diffusing filter which absorbs, without modification, the light wavelengths of the light emerging with respect to the incident light.