A method and a device for supporting a driver of a motor vehicle in utilizing an automatic engine start-stop system of the motor vehicle is provided. The method includes registering and storing, for at least one operating time of the motor vehicle and for each engine stop of a total number initiated by the automatic engine start-stop system in the operating time, at least the respective time durations where k=0, 1, 2, . . . P, where Pε[0, 1, 2, . . . ]. A first ratio value that is dependent on the operating time and the added time durations determined: W 1 = ∑ k = 0 P B ⁢ ⁢ t MS , k t B . ( 1 ) The first ratio value is output and/or an output which is dependent on the first ratio value is generated and output.