The relates to a method for operating a driver assistance unit of a motor vehicle using a navigation target specification device. A control unit operates by: receiving a target specification signal describing a projection on a trafficable driving surface; establishing the portion of the trafficable driving surface to which the light of the projection is applied as a driving target region; and, based on the received target specification signal, establishing a relative position of the motor vehicle relative to the driving target region. There is also a step of receiving an orientation signal from an orientation detection unit of the navigation target specification device, which describes a spatial target specification orientation of the navigation target specification device in the driving target region, on which basis a navigation target is established. Depending on the established relative position and the established navigation target, there is a step of establishing a movement path to the navigation target, a step of generating a navigation signal describing a controlling of the motor vehicle along the established movement path, and a step of transmitting the generated navigation signal to the driver assistance unit of the motor vehicle.