Method for assisting a user of a first motor vehicle in the operation of the first motor vehicle , which is located in a geographic region , comprising the steps: - sensing of at least one measurement value by a sensor device of a second motor vehicle which is also located (S2) in the region , - generating a sensor signal describing the measurement value by means of a control device of the second motor vehicle , - transferring the sensor signal to the motor-vehicle-external data server device (16, S3), wherein the method is characterised in that the sensor signal generated describes a current position of the second motor vehicle and is characterised by the steps carried out by the motor-vehicle-external data server device : - dividing the geographic region into several geographic sectors (22, 22', 22", S1), - receiving a request signal from the first motor vehicle , wherein the first motor vehicle at the time of the transfer of the request signal is not prepared to sense a measurement value of the same type, and wherein the request signal describes a current position of the first motor vehicle , - determining, based on the current positions of the motor vehicles , whether the motor vehicles are located (S5) within the same geographic sector (22, 22', 22"), - if the first motor vehicle and the second motor vehicle are located within the same geographic sector (22, 22', 22"), transferring the sensor signal to a control device of the first motor vehicle (10, 14, S6), - determining a respective number of motor vehicles in at least one of the geographic sectors (22, 22', 22"), wherein each of the motor vehicles is prepared to sense (S8) a measurement value of the same type, and - if the determined number of motor vehicles falls below a predefined minimum number, generating a control signal for controlling one of the motor vehicles to increase the number of motor vehicles which are prepared to sense the measurement value of the same type. - sensing of at least one measurement value by a sensor device of a second motor vehicle which is also located (S2) in the region , - generating a sensor signal describing the measurement value by means of a control device of the second motor vehicle , - transferring the sensor signal to the motor-vehicle-external data server device (16, S3), - dividing the geographic region into several geographic sectors (22, 22', 22", S1), - receiving a request signal from the first motor vehicle , wherein the first motor vehicle at the time of the transfer of the request signal is not prepared to sense a measurement value of the same type, and wherein the request signal describes a current position of the first motor vehicle , - determining, based on the current positions of the motor vehicles , whether the motor vehicles are located (S5) within the same geographic sector (22, 22', 22"), - if the first motor vehicle and the second motor vehicle are located within the same geographic sector (22, 22', 22"), transferring the sensor signal to a control device of the first motor vehicle (10, 14, S6), - determining a respective number of motor vehicles in at least one of the geographic sectors (22, 22', 22"), wherein each of the motor vehicles is prepared to sense (S8) a measurement value of the same type, and - if the determined number of motor vehicles falls below a predefined minimum number, generating a control signal for controlling one of the motor vehicles to increase the number of motor vehicles which are prepared to sense the measurement value of the same type. <EOS>