An electric brake device for a vehicle, comprising a) an electric service-brake device with a service-brake actuation device having a service-brake actuation element for producing a service-brake demand signal as a function of an actuation of the service-brake actuation element and with an electronic service-brake control system, which emits a closing signal for at least one service-brake actuator in the context of a service-brake function that depends on the service-brake demand signal, b) an electric parking-brake device with a parking-brake actuating device having a parking-brake actuation element separate from the service-brake actuation element in order to produce a parking-brake demand signal that depends on an actuation of the parking-brake actuation element and with an electronic parking-brake control system, which emits an actuation signal that depends on the parking-brake demand signal for the application of the parking-brake in the context of a normal parking-brake function, characterized in that at least one electronic control system (14; 96) is provided and designed so that, when the electric service-brake device is functional in the context of an extended parking-brake function, c) it monitors the state of movement of the vehicle and the degree of actuation (s) of the service-brake actuation element of the service-brake actuation device, and d) if it is detected that the vehicle is at rest, it immediately emits an actuation signal for the application of the parking-brake, if it is detected at the time (t 1) when it is established that the vehicle is at rest or after this time (t 1) that the service-brake actuation element has been actuated by a specified degree of activation (Δs) in excess of the degree of actuation (s 1) existing at the time (t 1) when the vehicle is at rest or after this time (t 1) wherein e) the at least one electronic control system (14; 96) is designed to monitor the parking-brake actuation device and to automatically activate the extended parking-brake function upon detecting an error or failure of the parking-brake actuation device and/or its parking-brake actuation element. a) an electric service-brake device with a service-brake actuation device having a service-brake actuation element for producing a service-brake demand signal as a function of an actuation of the service-brake actuation element and with an electronic service-brake control system, which emits a closing signal for at least one service-brake actuator in the context of a service-brake function that depends on the service-brake demand signal, b) an electric parking-brake device with a parking-brake actuating device having a parking-brake actuation element separate from the service-brake actuation element in order to produce a parking-brake demand signal that depends on an actuation of the parking-brake actuation element and with an electronic parking-brake control system, which emits an actuation signal that depends on the parking-brake demand signal for the application of the parking-brake in the context of a normal parking-brake function, characterized in that at least one electronic control system (14; 96) is provided and designed so that, when the electric service-brake device is functional in the context of an extended parking-brake function, c) it monitors the state of movement of the vehicle and the degree of actuation (s) of the service-brake actuation element of the service-brake actuation device, and d) if it is detected that the vehicle is at rest, it immediately emits an actuation signal for the application of the parking-brake, if it is detected at the time (t 1) when it is established that the vehicle is at rest or after this time (t 1) that the service-brake actuation element has been actuated by a specified degree of activation (Δs) in excess of the degree of actuation (s 1) existing at the time (t 1) when the vehicle is at rest or after this time (t 1) wherein e) the at least one electronic control system (14; 96) is designed to monitor the parking-brake actuation device and to automatically activate the extended parking-brake function upon detecting an error or failure of the parking-brake actuation device and/or its parking-brake actuation element.