Lexus 2013 IS250C Owner's Manual page 152

2-1. Driving procedures
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Selecting a driving mode
The following patterns can be selected to suit current driving and
operating conditions.
152
Power mode
For powerful acceleration
and driving in mountainous
regions.
Normal mode
Snow mode
For accelerating and driving
on slippery road surfaces,
such as on snow.
Press "SNOW" to return to nor-
mal mode.