Adjusting device for adjusting at least one optically relevant structural unit (701, 702) of a motor vehicle headlamp, comprising - at least one adjusting device (100, 101), which is arranged on a holder body, having a transmission element, which is mounted such that it can rotate about a first displacement axis, and a first adjusting element, which is in mechanical engagement with the transmission element by means of a connection, the first adjusting element having a threaded portion and an end portion - a coupling member in which the end portion of the first actuator is rotatably supported, the coupling member being fixed with respect to the at least one actuator (100, 101) during an adjustment thereof, and - a sliding element which is displaceably mounted on the holder body and is arranged to engage the at least one optically relevant assembly, and a guide part arranged on the sliding element and having a mating thread corresponding to the threaded portion of the first adjusting element, wherein the guide part mountable on the threaded portion of the first adjusting element is arranged in combination with the threaded portion to convert a rotary movement of the transmission element into a sliding movement of the sliding element along the displacement axis, wherein the adjusting device comprises a further adjusting device, which is electrically operable and has a drive device, and a second adjusting element, the drive device being arranged to displace the second adjusting element along a second displacement axis, characterized in that the second adjusting element has an end portion which end portion is connected to the coupling part, which coupling part is arranged to cause a displacement of the first adjusting element and thus of the sliding element along the first displacement axis when the second adjusting element is displaced along the second displacement axis. - at least one adjusting device (100, 101), which is arranged on a holder body, having a transmission element, which is mounted such that it can rotate about a first displacement axis, and a first adjusting element, which is in mechanical engagement with the transmission element by means of a connection, the first adjusting element having a threaded portion and an end portion - a coupling member in which the end portion of the first actuator is rotatably supported, the coupling member being fixed with respect to the at least one actuator (100, 101) during an adjustment thereof, and - a sliding element which is displaceably mounted on the holder body and is arranged to engage the at least one optically relevant assembly, and a guide part arranged on the sliding element and having a mating thread corresponding to the threaded portion of the first adjusting element, wherein the guide part mountable on the threaded portion of the first adjusting element is arranged in combination with the threaded portion to convert a rotary movement of the transmission element into a sliding movement of the sliding element along the displacement axis, wherein the adjusting device comprises a further adjusting device, which is electrically operable and has a drive device, and a second adjusting element, the drive device being arranged to displace the second adjusting element along a second displacement axis, characterized in that the second adjusting element has an end portion which end portion is connected to the coupling part, which coupling part is arranged to cause a displacement of the first adjusting element and thus of the sliding element along the first displacement axis when the second adjusting element is displaced along the second displacement axis.