When AIRSCARF is switched on, very hot air can flow from the outlet opening in the head restraints.
This could result in burns in the immediate vicinity of the outlet opening.
The power supply is switched on.
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AIRSCARF warms the head and neck area of vehicle occupants with warm air. The warm air flows out of the vents in the head restraints.
![](../../assets/images/423969810b52a683354ae36531593424_1_-----.png)
Depending on the heating level, up to three indicator lamps light up.
![](../../assets/images/423969810b52a683354ae36531593424_1_-----.png)
If all of the indicator lamps are off, AIRSCARF is switched off.
When switching on, the blower starts up only after a preheating phase which lasts a few seconds.
After switching off, the blower runs on for a few seconds to cool down the heating elements.
If the vehicle battery voltage is too low, AIRSCARF may switch off.
Make sure that there are no objects covering the intake grille on the back of the head restraint.
Make sure that objects do not enter the vents in the head restraints.