Air Quality Sensor
For vehicles with an air quality sensor, the climate control system adjusts to limit some exhaust fumes from being pulled inside your vehicle.
Press the AUTO button on the climate control to activate the air quality sensor. The recirculation indicator light comes on when poor quality air is detected. The air quality sensor will not maintain recirculation for an extended period to prevent the air inside the vehicle from becoming too dry or stuffy.
Under certain conditions, the air
quality sensor will not activate,
such as during cold weather or
with extreme odors. Press 
to
activate recirculation.
The air quality sensor system does not protect against carbon monoxide (CO), which you cannot see or smell. See Engine Exhaust.
See also:
Keyless Unlocking
With the keyless access transmitter
within 1m (3 ft), approach the front
door and pull the handle to unlock
and open the door. On some
models there is a touch sensor on
the door handle. If t ...
Washer Fluid
What to Use
When adding windshield washer
fluid to the vehicle, be sure to read
the manufacturer's instructions
before use. If you will be operating
your vehicle in an area where the
temper ...
Design
Cadillac CTS Coupe emerged as a proposal inside Cadillac's design studio,
where designers have developed and evolved the brand's Art and Science design
philosophy.
"Cadillac has always been ...