Method and device for operating a brake system and a vehicle having the brake system

A method for operating a brake system of a motor vehicle, the brake system including at least one electric actuator, which may be driven to generate a braking force, the at least one electric actuator being controllable by an autonomous driving system and as a function of manipulation of a brake pedal of the vehicle, the method comprising:

• superimposing a control signal of the at least one electric actuator from the autonomous driving system with a varying validation signal;
• monitoring a differential travel between an actuator element of the at least one electric actuator and the brake pedal;
• detecting a driving of the at least one electric actuator by brake-pedal manipulation during the control by the autonomous driving system when the differential travel varies;
• and
• initiating an emergency braking action when the at least one electric actuator is driven both by the autonomous driving system and by manipulation of the brake pedal.