Driver assistance in a motor vehicle using a navigation system and a road sign display system, wherein: the navigation system accesses map data representing road segments of a road network in the geographic proximity of the motor vehicle and road signs located on the road segments, determines and provides a current position of the motor vehicle located on a road segment, and provides first information of at least one road sign which is located on a road segment to be travelled by the motor vehicle based on the current position of the motor vehicle; the road sign display system detects, based on environment information in front of and/or sideways of the motor vehicle captured via a camera unit, at least one road sign in regard to its position at a road segment and/or its meaning, and provides this second information to the driver assistance system; and wherein the first and second information are compared with each other, and, if the first and second information do not coincide, the first information provided by the navigation system is outputted for an associated signaling for the driver of the motor vehicle or a velocity affecting unit of the motor vehicle.