Less than a month after Elon Musk said Sentry Mode for Teslas would be "coming soon", the update has started rolling out, along with a couple of other tweaks. In a blog post describing Sentry Mode, Tesla explained that it uses the car's external cameras to look for potential threats. If in standby, the cameras are watching, ready to enter an "Alert" state if someone does something similar to the car that pops up a message on the touchscreen and says the cameras are recording.
If someone breaks a window or something, it goes directly into the Alert, which activates the alarm, plays high volume music and displays the brightness of the interior. It also sends a notice to the owner via their Tesla app, and if they have connected a formatted USB drive before enabling Sentry Mode, it stores a recording of everything that starts ten minutes before the alarm was triggered. You must turn on Sentry Mode every time you want to use it ̵
Sentry Mode continuously monitors your vehicle's environment while locked and parked. When a potential threat is detected, the cameras on the car begin to pick up and the alarm system is activated. You will receive a notification from your Tesla app and notify you that an event has occurred.
To enable Sentry Mode, go to Controls> Security and Security> Sentry Mode.
Sentry Mode is designed to add another layer of protection to your car, but it does not prevent all possible threats.