Suggested search queries are provided to a user as search assistance while a user is entering a search query but before the user submits a completed search query for a search to be performed. The probe includes a thin film portion constituted by at least one layer of thin film that serves as the surface of the probe, and an inner bulk portion which is covered by the thin film portion. The essential electric amount represents an electric power consumption of essential electric loads which are not economizable and essentially required for driving an automotive vehicle.