See also:

Temperature control dial
This dial regulates the temperature of airflow from the air outlets over a range from the blue side (cool) to red side (warm). ...

For U.S.A.
The following information has been compiled according to Code of Federal Regulations “Title 49, Part 575”. ...

Gross Axle Weight (GAW) and Gross Axle Weight Rating (GAWR)
Gross Axle Weight The total weight applied to each axle (GAW) must never exceed the Gross Axle Weight Rating (GAWR). The front and rear GAWs can be adjusted by relocating passengers and l ...