Lexus GS 450h 2008 Owner's Manual page 146

2-1. Driving procedures
Changing shift ranges in "S" mode
Shift the shift lever to the "S" position and operate the shift lever.
The initial shift range in "S" mode is automatically set to "5".
■ Shift ranges and their functions
● You can choose from 6 levels of engine braking force.
● A lower shift range will provide greater engine braking force than a
higher shift range, and the engine revolutions will also increase.
● If you accelerate while in ranges "1" to "5", the shift range may auto-
matically range up in accordance with the vehicle' s speed.
144
Upshifting
Downshifting