How can I tell if my Tesla is being watched?  

This article discusses the operation of Tesla's Sentry Mode and how owners can employ it to keep an eye on their cars.  

To identify potential dangers, including vandals  

and robbers, Sentry Mode employs external cameras.

The vehicle goes into standby mode when a threat is identified and monitors the area until it has passed.  

It can also be used to monitor who gets in and out of the vehicle, which can help owners see possible problems.  

Look for the "Sentry Mode" feature in the settings of your Tesla to see if it is being monitored.  

If activated, it makes use of the car's cameras to watch livestreams of what is going on outside while keeping an eye on drivers.