See also:

Tachometer
The tachometer indicates engine speed in revolutions per minute (RPM). Do not rev the engine into the red zone1 . CAUTION When engine speed approaches the red zone, shift to a higher gear or re ...

Warning/indicator lights
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Tow mode switch
Tow mode should be used when pulling a heavy trailer or hauling a heavy load. Driving the vehicle in the tow mode with no trailer/load or light trailer/light load will not cause any damage. Howev ...