Your Model S includes the following components that actively monitor the surrounding area:

Model S is also equipped with high precision electronically-assisted braking and steering systems.
In addition, the cabin camera can determine driver inattentiveness and provide alerts when Autopilot is engaged. By default, data from the camera does not leave the vehicle itself. In other words, data is not saved or transmitted unless you enable data sharing. To enable data sharing, touch Controls > Software > Data Sharing > Allow Cabin Camera Analytics. Cabin Camera Analytics helps Tesla continue to develop even safer vehicles in the future. See Cabin Camera.
NOTE: Ensure all cameras and sensors (if equipped) are clean before each drive. See Cleaning Cameras and Sensors for more information. Dirty cameras and sensors, as well as environmental conditions such as rain and faded lane markings, can affect Autopilot performance.
Active Safety Features
These Active Safety features are designed to increase your safety:
You can enable/disable some of these features and in some cases, control how they work. To access settings for these features, touch Controls > Autopilot.
Autopilot Features
Limitations
Cleaning Cameras and Sensors
Coolant Heater - Electric - Battery - 2nd Generation (Remove and Replace)
Fixed Glass - Front Door - LH (Remove and Replace)