1. A method for activating a vehicle mechanism, the method comprising: capturing with a detector a facial feature of a person and at least one of an utterance by the person, and an action performed by the person; comparing at least one of the captured facial feature and the captured at least one of utterance and action to a database comprising at least one of facial features, utterances, and actions that are predefined by people who are authorized to activate a vehicle mechanism in order to determine whether the person is authorized to activate a vehicle mechanism; if the person is authorized to activate a vehicle mechanism, capturing one of an utterance by the authorized person and an action by the authorized person for specifying the vehicle mechanism to be activated; and activating the specified vehicle mechanism.