Lexus IS220d 2011, Manual

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2-3. Operating the lights and windshield wipers
IS250/220d/200d_EE
Daytime running light system (if equipped)
Vehicles with halogen headlights
To make your vehicle more visible to other drivers, the head-
lights turn on automatically (at a reduced intensity) whenever
the engine is started. Daytime running lights are not designed for
use at night.
Vehicles with discharge headlights
To make your vehicle more visible to other drivers, the front
position lights turn on automatically (at a increased intensity)
whenever the engine is started. Daytime running lights are not
designed for use at night.

Deactivating daytime running light (vehicles with discharge
headlights)
How to switch:

P. 365
“DRL OFF” turns on when the daytime running light is deactivated.

Headlight control sensor
The sensor may not function properly if
an object is placed on the sensor, or any-
thing that blocks the sensor is affixed to
the windshield.
Doing so interferes with the sensor
detecting the level of ambient light and
may cause the automatic headlight sys-
tem to malfunction