Mercedes-Benz CLS Owner's Manual page 149

146 Climate control
Problems with the remote control for the
stationary heater/ventilation
FAIL ¨ ¨ appears on the remote control dis‐
play
Possible cause:
The signal transmission between the trans‐
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mitter and the receiver is malfunctioning.
Change your position in relation to the vehi‐
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cle, moving closer if necessary.
FAIL appears on the remote control display
Possible cause:
The starter battery is not sufficiently
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charged.
Charge the starter battery.
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Possible cause:
The fuel tank content is below the reserve
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fuel level.
Refuel at the nearest filling station.
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FAIL ¯ ¯ appears on the remote control dis‐
play
Possible cause:
There is a malfunction in the stationary
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heater.
Have the stationary heater checked at a
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qualified 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
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another area of the vehicle interior.
To guarantee the flow of fresh air through the air
vents into the vehicle interior, comply with the
following:
Always keep the vents and vent grilles in the
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vehicle interior free.
Keep the air inlet free of residue build-up
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( page 299).
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To open or close: hold the air vent
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centre and turn it to the left or right as far as
it will go.
To set the airflow direction: hold the air
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vent 1 in the centre and move it up or down
or to the left or right.
1 in the