Mercedes-Benz S-Class Saloon W223 2021 Owner's Manual page 188

186 Climate control
FAIL ¯ appears on the remote control display
Possible cause:
There is a malfunction in the stationary heater.
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Have the stationary heater checked at a quali-
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fied specialist workshop.
Air vents
▌Adjusting the front air vents
& WARNING Risk of burns and frostbite due
to being too close to the air vents
Very hot or very cold air can flow from the air
vents.
Make sure that all vehicle occupants
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always maintain a sufficient distance
from the air vents.
If necessary, direct the airflow to another
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area of the vehicle interior.
To guarantee the flow of fresh air through the air
vents into the vehicle interior, comply with the fol-
lowing:
Always keep the vents and ventilation grilles in
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the vehicle interior clear.
Keep the air inlet grille free of residue build-up
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( page 364).
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P223 0288 02
To open the centre and side air vents: press
#
button 1.
The three indicator lamps on the button will
light up. The air vents will be opened com-
pletely.
To close the centre and side air vents: press
#
1
button again.
The three indicator lamps on the button will go
out one by one. The air vents will be closed
completely.
To adjust the airflow direction of the side air
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vents: hold outer side air vent
and move it up or down or to the left or right.
To adjust the airflow direction of the centre
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air vents: hold air vent 3 in the centre and
move it up or down or to the left or right.
▌Adjusting the rear air vents
& WARNING Risk of burns and frostbite due
to being too close to the air vents
Very hot or very cold air can flow from the air
vents.
2 in the centre