When Sentry Mode detects an event, can it only push a notification without flashing the lights?
Official answer
Not currently. Once Sentry Mode is enabled, when the vehicle detects a suspicious event, it will automatically start recording, activate the hazard lights, and display the "Recording in Progress" status on the central control screen to alert people nearby.
This serves two purposes: first, it warns potential wrongdoers to prevent them from further endangering the vehicle; second, it informs surrounding people that the system is recording, thereby respecting their privacy.