Lexus 2013 IS250 Owner's Manual page 201

Gear Shift Indicator (if equipped)
The Gear Shift Indicator display is a guide to help the driver achieve
improved fuel economy and reduced exhaust emissions within limits of
engine performance.
1
When not in operation
2
Shift-up indicator

Gear Shift Indicator function

This function automatically operates during M mode.

By following the Shift-up indicator and shifting up accordingly, it is
possible to achieve improved fuel economy and reduced exhaust
emissions.

The Gear Shift Indicator does not have a similar function for down-
shifting.

Depending on the driving conditions, the Gear Shift Indicator may
not display the Shift-up indicator while driving in M mode.

When the "-" paddle shift switch is operated with the shift lever in the D position
A shift range will be automatically selected. The highest gear of the first shift
range will be one gear lower than the gear in use during normal D position driv-
ing.

Automatic deactivation of shift range selection in the D position
Shift range selection in the D position will be deactivated in the following situa-
tions:

When the vehicle comes to a stop

If the accelerator pedal is depressed for more than a certain period of time

When the shift lever is shifted to a position other than D

To protect the automatic transmission
"Transmission Fluid High Temperature" is displayed on the multi-information
display and a function is adopted that automatically selects a higher shift range
when the fluid temperature is high. Have the vehicle inspected by any authorized
Lexus dealer or repairer, or another duly qualified and equipped professional.
IS250_EE(OM53B11E)
4-2. Driving procedures
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