An operating liquid container system, comprising - a fuel container with a fuel fill level sensor; - a urea container with a urea fill level sensor; - a tank control device which is connected to the fuel fill level sensor in order to receive data representing a fill level of the fuel container and to the urea fill level sensor in order to receive data representing a fill level of the urea container, wherein the operating liquid container system has the following characteristics: - the tank control device is designed to determine, taking into consideration the data representing the fill level of the fuel container, a first distance that can be covered with the fuel quantity situated in the fuel container; - the tank control device is furthermore designed to determine, taking into consideration the data representing the fill level of the urea container, a second distance that can be covered with the urea quantity situated in the urea container; and - the tank control device is designed to output a warning signal if the second distance is shorter than or equal to the first distance, wherein the operating liquid container is characterized by the following features: - the fuel container comprises at least one electrically and/or electromagnetic and/or electromechanically actuatable actuator (14, 15) by means of which an ending of a filling process of the fuel container can be initiated; - the tank control device is connected to the actuator (14, 15) in order to transmit signals to the actuator (14, 15); and - the tank control device is designed to transmit a filling stop signal to the actuator (14, 15) if the second distance is shorter or equal to than the first distance. - a fuel container with a fuel fill level sensor; - a urea container with a urea fill level sensor; - a tank control device which is connected to the fuel fill level sensor in order to receive data representing a fill level of the fuel container and to the urea fill level sensor in order to receive data representing a fill level of the urea container, wherein the operating liquid container system has the following characteristics: - the tank control device is designed to determine, taking into consideration the data representing the fill level of the fuel container, a first distance that can be covered with the fuel quantity situated in the fuel container; - the tank control device is furthermore designed to determine, taking into consideration the data representing the fill level of the urea container, a second distance that can be covered with the urea quantity situated in the urea container; and - the tank control device is designed to output a warning signal if the second distance is shorter than or equal to the first distance, - the tank control device is designed to determine, taking into consideration the data representing the fill level of the fuel container, a first distance that can be covered with the fuel quantity situated in the fuel container; - the tank control device is furthermore designed to determine, taking into consideration the data representing the fill level of the urea container, a second distance that can be covered with the urea quantity situated in the urea container; and - the tank control device is designed to output a warning signal if the second distance is shorter than or equal to the first distance, wherein the operating liquid container is characterized by the following features: - the fuel container comprises at least one electrically and/or electromagnetic and/or electromechanically actuatable actuator (14, 15) by means of which an ending of a filling process of the fuel container can be initiated; - the tank control device is connected to the actuator (14, 15) in order to transmit signals to the actuator (14, 15); and - the tank control device is designed to transmit a filling stop signal to the actuator (14, 15) if the second distance is shorter or equal to than the first distance. - the fuel container comprises at least one electrically and/or electromagnetic and/or electromechanically actuatable actuator (14, 15) by means of which an ending of a filling process of the fuel container can be initiated; - the tank control device is connected to the actuator (14, 15) in order to transmit signals to the actuator (14, 15); and - the tank control device is designed to transmit a filling stop signal to the actuator (14, 15) if the second distance is shorter or equal to than the first distance.