Driver assistance device for a motor vehicle and method for operating such a

Driver assistance device (2) for a motor vehicle (1), having a detection device (3) for sensing of another road user (12), with an illumination device (4) for illuminating an in a vehicle longitudinal direction (F) viewed lateral surrounding region (6) of the motor vehicle (1) having at least one to the vehicle longitudinal direction (F) obliquely extending optical axis (O), with a control device (5) which is connected to the detection means (3) and the illumination device (4) coupled to said detecting means is adapted (3), a in the vehicle longitudinal direction (F) of the motor vehicle (1) in front of the motor vehicle (1) substantially transversely to the vehicle longitudinal direction (F) moving other road users (12) to detect and control means (5) is designed , the detected other road users (12) substantially transverse to the motor vehicle (1) moving to identify themselves and by the illumination device (4) to give a light signal if the control device (5) in front of the motor vehicle (1 ) is recognized across this moving of other road users (12) to increase the road safety.