Lexus 2013 GS 350 Owner's Manual page 171

Fog light switch
The fog lights secure excellent visibility in difficult driving conditions,
such as in rain and fog.
or
1 (U.S.A.)
Turns the front fog lights off
Turns the front fog lights on
2
Fog lights can be used when
■
The headlights are on in low beam.
GS350_U (OM30C34U)
4-3. Operating the lights and wipers
(Canada)
I n f o r ma t i o n P r o v i d e d b y :
195
4
: If equipped