Lexus ES300 Owner's Manual page 45

With the knob in the "AUTO" position, there may be a case
that the headlights do not turn on immediately, even when
the vehicle enters a dark place such as a tunnel or parking
lot according to lighting conditions. In this case, we
recommend you to twist the knob manually to the second
clickstop to turn on the headlights immediately.
When the tail lights are on, the tail light indicator lights up in the
instrument cluster.
When the headlight switch is turned to the first or second
clickstop, the brightness of the instrument cluster will be
reduced slightly unless the instrument panel light control dial
is turned fully up.
The automatic light control sensor is on the top of the driver's
side instrument panel.
Do not place anything on the instrument panel, and/or do not
affix anything on the windshield to block this sensor.
When the headlights are on, they automatically turn off about
30 seconds after any door or trunk lid is opened and closed
with the ignition key turned to the "ACC" or "LOCK" position.*
If you want to turn off the lights immediately, push the "LOCK"
button on the wireless remote control key twice. The lights also
can be turned off immediately by pushing the "LOCK" button
on the wireless remote control key with all the doors locked and
the trunk lid closed.
NOTE:
* The time before turning off the lights can be changed.
Ask your Lexus dealer for details.
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