Device for regulating a hydraulically activated mechanically non-intrinsically safe double clutch transmission in the drive train of a motor vehicle, comprising - a main computer (μC) for regulating the normal operation of the vehicle, which computer can, in the emergency operating mode, activate a separate hardware unit, - a monitoring unit for monitoring the main computer (μC), wherein in the emergency operating mode the monitoring unit can actuate the separate hardware unit, - a first hydraulic clutch for a first component transmission, a second hydraulic clutch for a second component transmission, wherein in the pressureless state at least one of the hydraulic clutches (KH1, KH2) is closed by a spring force, - a control unit (SE1, SE2) for controlling a hydraulic clutch actuator (KAH1, KAH2) for activating the at least one hydraulic clutch (KH1, KH2) which is closed by spring force in the pressureless state, wherein - in the case of a fault the safe state of an open drive train can be brought about by the separate hardware unit in that the separate hardware unit actuates the hydraulic clutch actuator (KAH1, KAH2) by means of the first control unit, and the latter opens the at least one hydraulic clutch (KH1, KH2) which is closed by spring force in the pressureless state, and - the state of the open drive train can be brought about by using hydraulic and/or electrical residual energy stored in the device, and wherein this state can be maintained without applying additional energy, until the emergency operating mode is cancelled, characterized in that when the at least one hydraulic clutch (KH1, KH2) is closed by spring force in the pressureless state is in the opened position, the hydraulic clutch actuator (KAH1, KAH2) can be held in this position by means of a mechanical locking device. - a main computer (μC) for regulating the normal operation of the vehicle, which computer can, in the emergency operating mode, activate a separate hardware unit, - a monitoring unit for monitoring the main computer (μC), wherein in the emergency operating mode the monitoring unit can actuate the separate hardware unit, - a first hydraulic clutch for a first component transmission, a second hydraulic clutch for a second component transmission, wherein in the pressureless state at least one of the hydraulic clutches (KH1, KH2) is closed by a spring force, - a control unit (SE1, SE2) for controlling a hydraulic clutch actuator (KAH1, KAH2) for activating the at least one hydraulic clutch (KH1, KH2) which is closed by spring force in the pressureless state, wherein - in the case of a fault the safe state of an open drive train can be brought about by the separate hardware unit in that the separate hardware unit actuates the hydraulic clutch actuator (KAH1, KAH2) by means of the first control unit, and the latter opens the at least one hydraulic clutch (KH1, KH2) which is closed by spring force in the pressureless state, and - the state of the open drive train can be brought about by using hydraulic and/or electrical residual energy stored in the device, and wherein this state can be maintained without applying additional energy, until the emergency operating mode is cancelled, characterized in that when the at least one hydraulic clutch (KH1, KH2) is closed by spring force in the pressureless state is in the opened position, the hydraulic clutch actuator (KAH1, KAH2) can be held in this position by means of a mechanical locking device.