Turn the knurled ring to 
.
The warning light 
on the instrument
cluster will come on.
See also:
Freeing A Stuck Vehicle
If your vehicle becomes stuck in mud, sand or snow, it can often be moved by
a rocking motion. Turn your steering wheel right and left to clear the area around
the front wheels. Then shift back an ...
Central vents
(A) - Air flow opening/closing control. ...
Troubleshooting
General
Sound Volume Low
The Fader function should be adjusted to the values “F” (front) only to prevent
the reduction in radio output power and the cancelling of the volume if the Fader
level a ...