Pressing the button changes the vehicle-to-vehicle distance as follows:

The vehicle-to-vehicle distance is set automatically to long mode when the engine switch is turned to ignition on mode.
If a vehicle is running ahead of you, the preceding vehicle mark will also be displayed.
Vehicle-to-vehicle distance settings
Select a distance from the table below. Note that the distances shown correspond to a vehicle speed of 50 mph (80 km/h). Vehicle-to-vehicle distance increases/decreases in accordance with vehicle speed.

Adjusting the set speed
Canceling and resuming the speed controlContact/call history
settings
The contact can be transferred from a bluetooth® phone to the system.
The contact also can be added, edited and deleted.
The call history can be deleted and contact and favorites can be
changed.
Display the "phone/message settings" screen.
Select "contact/call history s ...