Lexus LS460 2011 Owner's Manual page 199

2-1. Driving procedures

"S" mode

When the shift range is "6" or lower, holding the shift lever toward "+"
sets the shift range to "8".

When the shift lever is moved toward "-", the shift range is downshifted
to a range that enables engine braking force that is suitable to driving
conditions.

To prevent the engine from over-revving, upshifting may automatically
occur.

Downshifting restrictions warning buzzer (in the "S" mode)
To help ensure safety and driving performance, downshifting operation may
sometimes be restricted. In some circumstances, downshifting may not be
possible even when the shift lever is operated. (A buzzer will sound twice.)

When driving with the cruise control system
Engine brake will not operate in the "S" mode, even when downshifting to
"7", "6", "5" or "4". (P. 228, 232, 246)

Snow mode automatic deactivation
Snow mode is automatically deactivated if the "ENGINE START STOP"
switch is turned off after driving in snow mode.

Operation of the air conditioning system in Eco drive mode
Eco drive mode controls the heating/cooling operations and fan speed of the
air conditioning system to enhance fuel efficiency. (P. 387) To improve
air conditioning performance, adjust the fan speed or turn off Eco drive
mode.

If the shift lever cannot be shifted from "P"
P. 725

AI-SHIFT
The AI-SHIFT automatically selects the suitable gear according to driver
performance and driving conditions.
The AI-SHIFT automatically operates when the shift lever is in the "D" and
"S" position.
The engine speed may remain high after releasing the accelerator pedal.
This does not indicate a malfunction.
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