The invention relates to a under the direction of the system for mutual recognition and a direction in front of the direction for mutual recognition is provided, which allow a driver of a vehicle, it can be seen that a driver of the other vehicle, the vehicle recognizes. When a driver (u) of a vehicle (a first vehicle) the other vehicle (a second vehicle) can be seen, which in a dead angle of the vehicle is present, the driver operates a switch (24), which is provided in the motor vehicle, in order to provide a light emitting unit (25), to emit light. When a driver (f) of the other vehicle, the light emission of the vehicle, operates the driver (f) of the other vehicle, a switch provided in the other vehicle (24), in order to output a response signal to the vehicle. When detecting the response signal of the vehicle is informed in a direction in front of the direction (100) for mutual recognition of the vehicle the driver (u) of the vehicle that a response was extended.
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