See also:

Radar sensor
The radar sensor detects vehicles or other obstacles on or near the road ahead and determines whether a collision is imminent based on the position, speed, and heading of the obstacles. ...

Event data recorder
This vehicle is equipped with an event data recorder (EDR). The main purpose of an EDR is to record, in certain crash or near crash-like situations, such as an air bag deployment or hitting a road ...

When receiving a phone call
 - Answering the phone Press the off-hook switch.  - Refusing the call Press the on-hook switch. ...