Buick 2007 Terraza Owner's Manual page 198

)
(Bi-Level): This mode directs half of the air
to the instrument panel outlets, then directs
the remaining air to the floor outlets. Cooler air is
directed to the upper outlets and warmer air to
the floor outlets.
6
(Floor): This mode directs most of the air to
the floor outlets. Use this mode to send air to
the rear of the vehicle. Keep the area under the
front seats free of objects that could obstruct
airflow to the rear of the vehicle.
Outside Air: This mode is automatically selected
when your vehicle is in any mode except
maximum air conditioning.
The right knob can also be used to select defog
or defrost mode. For more information, see
"Defogging and Defrosting" later in this section.
#
(Air Conditioning): Press this button to
turn the air conditioning system on or off. When
it is pressed, an indicator light in the button
will come on to let you know that air conditioning
is activated.
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You may notice a slight change in engine
performance when the air conditioning compressor
shuts off and turns on again. This is normal.
The system is designed to make adjustments to
help with fuel economy while still maintaining
the selected temperature.
On hot days, open the windows to let hot inside
air escape; then close them and switch to
maximum air conditioning mode. This helps to
reduce the time it takes for your vehicle to
cool down. It also helps the system to operate
more efficiently.
The air conditioning system removes moisture
from the air, so you may sometimes notice a small
amount of water dripping underneath your
vehicle while idling or after turning off the engine.
This is normal.
(
(Heated Seats): Press this button to turn on
the heated seats. The button on the left controls
the driver's seat and the button on the right
controls the passenger's seat. See Heated Seats
on page 10 for additional information.