Using the Air Conditioning and Rear Window Defogger. Steering Wheel Heater/ Seat Heaters/ Seat Ventilators
The steering wheel heater heats the steering wheel grips, and the seat heaters heat the seats. The seat ventilators maintain adequate airflow by blowing air out of the seats.
WARNING
- If the following persons come into contact with the steering wheel or seats while the steering wheel heater or seat heaters are on, there is a risk of injury:
- To avoid minor burns or overheating, observe the following precautions:
- To prevent damage to the seat heaters/seat ventilators, do not place heavy or sharp objects on the seats, and make sure that no needles, nails, etc. are inserted into the seats.
- To prevent battery discharge, do not use these functions when the engine is off.
Steering Wheel Heater (if equipped)

Turning the Steering Wheel Heater On and Off. The indicator light shows that the heater is operating.
- The steering wheel heater can be used when the engine switch is in the IGNITION ON mode.
- The steering wheel heater turns off automatically after approx. 30 minutes.
Seat Heater/Seat Ventilator
■ Front Seat Heaters and Ventilators (if equipped)/Rear Seat Heaters (if equipped)
Front Seats

Rear seats

- Seat heater switch.
The indicator light (amber) on the switch illuminates when the seat heater is operating.
- Seat ventilator switch (front seats only).
The indicator light (green) on the switch illuminates when the seat ventilator is operating.
- Level indicators.
The heating level of the seat heater or the fan speed of the seat ventilator (front seats only) is displayed.
- "AUTO" indicator lights.
- Modes and Indicator Lights
The mode can be changed by pressing the switch.

*: When the AUTO mode is selected, the level changes automatically according to the air conditioning settings.
■ Seat heaters (without seat ventilators) (if equipped)
- Seat heater switch
- Level indicators
The seat heater level is displayed.

- Modes and Indicator Lights
Each time the switch is pressed, the mode changes as follows:

*: The mode changes automatically depending on the elapsed time. The time until the mode changes varies and depends on the interior temperature when the seat heater is turned on, among other factors.
■ Seat ventilators (without seat heaters) (if equipped)

- Seat ventilator switch
- Level indicators
The seat ventilator fan level is displayed.
- Modes and Indicator Lights
Each time the switch is pressed, the mode changes as follows:

■ Requirements for operating the seat heaters/seat ventilators
The engine switch is in the IGNITION ON mode.
■ Seat heater control (vehicles without AUTO mode)
The seat heater automatically adjusts its operating mode. If the engine switch is turned off while the seat heater is operating, the operating mode when the heater is restarted depends on the time that has elapsed between turning it off and turning it back on.

■ Automatic seat heater operation in Eco mode
If you switch the drive mode select switch to ECO drive mode in cold temperatures, the seat heater may turn on automatically to improve heating performance.
■ Automatic operation in S-FLOW mode
The front seat heaters and ventilators or the rear seat heaters may turn off automatically when S-FLOW mode is turned on in AUTO mode.
■ Switch lock function (vehicles with rear control panel)
To prevent accidental operation, certain switches on the rear armrest can be locked.
■ If the switch is disabled (vehicles with rear control panel)
If the rear control panel switch cannot be operated even though the switch lock function is canceled, check whether the switch is disabled because the Remote Touch
has been selected.
■ Rear control panel illumination off (vehicles with rear control panel)
The illumination of the control panel on the rear armrest can be turned off.
■ Personal settings
You can change the automatic operation of the front seat heaters (without seat ventilators) and the AUTO mode settings for the front seat heaters and ventilators or for the rear seat heaters.
The steering wheel heater as well as the seat heaters and seat ventilators of the Lexus GS GRL1 (2016–2020) provide a comfortable driving experience in any weather. Thanks to intelligent control, temperature and airflow can be adjusted individually, so the interior of this sports sedan adapts perfectly to the needs of the occupants.
Special safety and protection functions prevent overheating and unintended activation, so the Lexus GS meets the highest demands for comfort and safety.
Test yourself
A quick Lexus GS quiz: every answer comes with an explanation and a link to the manual page.