Longitudinal guide of a motor vehicle by intervention in the braking system

A brake request signal including a driver assistance system to be output to the brake control unit (12) (10), longitudinal guide device of an automobile, the driver assistance system (10), a brake request signal, the vehicle therein represents the distance to be moved the vehicle to reach a predetermined target speed (vz), the distance signal is formed to output in the form of (S_soll), and a brake control unit (12), the distance signal is characterized in that a has a conversion unit (20) for converting the brake operation signal (Pi). .FIELD 1