Abstract: Disclosed is a device for starting and operating an engine in a motor vehicle. Said device comprises an ID generator (20) which can be inserted into a stationary receptacle of the motor vehicle and is provided with an engaging means (25.1, 25.2) on at least one sidewall. At least one lever (30.1, 30.2) of the first class that encompasses a retaining arm and a control arm (32.1, 32.2) is used for retaining the ID generator (20) in the receptacle. The retaining arm is fitted with opposite engaging means (25.1, 25.2) while the control arm (32.1, 32.2) is equipped with a control point for the swiveling movement of the lever (30.1, 30.2) as well as a locking point (34.1) for a locking device which secures the inserted position of the ID generator (20). In order to embody the inventive device in a compact manner, a stationarily pivot-mounted elbow lever (30.1, 30.2) whose control arm (32.1, 32.2) extends perpendicular to the direction of insertion of the ID generator (20) is used in the receptacle.