Lexus GS430 User Manual page 248

TOUCH SCREEN
Average Speed
The Average Speed is displayed. The average vehicle
speed is calculated and displayed based on the total
driving distance and the total driving time after the engine
is started.
The displayed value is updated every 10 seconds.
To calculate from the beginning, touch the "Reset" switch.
Distance
The distance after engine starting is displayed.
When refueling, be sure to stop your vehicle and turn the
engine switch off.
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Hands−free system
Hands−free system allows you to make or receive a call
without taking your hands off the steering wheel by
connecting your cellular phone.
This system supports the Bluetooth. Bluetooth is a wireless
data system by which you can call without your cellular phone
connecting with a cable or placing on a cradle.
If your cellular phone does not support the Bluetooth, this
system can not function.
CAUTION
While you are driving, do not use a cellular phone or
connect the Bluetooth phone.
NOTICE
Do not leave your cellular phone in the vehicle. The
temperature indoor may be high and damage the phone.