Cadillac 2007 CTS, Owner'S Manual, Page: 174 / 518

If it is dark enough outside and the exterior lamp
control is off, a Headlamps Suggested message
will appear on the Driver’s Information Center
(DIC) display. This message informs the driver that
turning on the exterior lamps is recommended
even though the DRL are still on. Turning
the exterior lamp control to AUTO or to the
low-beam headlamp position will turn off the DRL
and cancel the Headlamps Suggested message.
If the parking lamps or the fog lamps were
turned on instead, the DRL will still turn off and
the Headlamps Suggested message will be
displayed. You can turn it off by pressing the OK
button if you have the Navigation audio system
or the CLR (Clear) button if you have the
base audio system.
To drive your vehicle with the DRL off, turn the
exterior lamp control off. Then turn on the
fog lamps or parking lamps, and the DRL will turn
off. The Headlamps Suggested message will
appear on the DIC display. This will work
regardless of gear position and whether or not the
parking brake is set.
As with any vehicle, you should turn on the
regular headlamp system when you need it.
Light Sensor
The light sensor for the DRL and AUTO headlamp
feature is located on top of the instrument panel.
If you cover the sensor, it will prevent it from
sensing light, and the exterior lamps or the
Headlamps Suggested message will appear on
the DIC whenever the ignition is on.
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