Lexus IS F 2012 Owner's Manual page 135

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Changing "ENGINE START STOP" switch mode
Modes can be changed by pressing the "ENGINE START STOP"
switch with the brake pedal released. (The mode changes each time
the switch is pressed.)
2-1. Driving procedures
OFF*
The emergency flashers can be
used.
ACCESSORY mode
Some electrical components
such as the audio system can be
used.
The "ENGINE START STOP"
switch indicator turns amber.
IGNITION ON mode
All electrical components can
be used.
The "ENGINE START STOP"
switch indicator turns amber.
*: If the shift lever is in a position
other than P when turning off
the engine, the "ENGINE
START STOP" switch will be
turned to ACCESSORY mode,
not to OFF.
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