Vents
Adjust air flow direction for the driver’s and passenger’s side 1 , and center 2 ventilators by moving the ventilator slide and/or ventilator assemblies.
Open or close the ventilators 1 by using the dial.
Move the dial toward the 
to open
the ventilators
or toward the 
to close them.
See also:
Towing load/specification
1: All towing above 1,000 lb (454 kg) requires the use of trailer brakes.
2: Sway control devices are not offered by NISSAN. See a professional
trailer/hitch outlet for a properly
designed sway ...
Overview
The Altima is a mid-size car currently being manufactured by the Japanese
automaker Nissan, and is arguably a continuation of the "bloodline" that began
with the Nissan Bluebird in 1957. ...