See also:

Center ventilators
Center ventilators Move the tab to adjust the flow direction. ...

While climbing a grade
When driving up a hill, undesired upshift to 4th gear is prevented from taking place when the accelerator is released. This minimizes the chance of subsequent downshifting to a lower gear when acceler ...

If steam is coming from the engine compartment
Turn off the engine and get everyone away from the vehicle until it cools down. ...