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262 Display messages and warning and indicator lamps
Driving systems
Display messages
À
ATTENTION ASSIST inop-
erative
ATTENTION ASSIST:
Take a break!
Active Distance Assist
- - - km/h
Active Distance Assist
Off
Active Distance Assist
inoperative
Active Distance Assist
and Limiter inoperative
Active Distance Assist
suspended
Active Distance Assist
currently unavailable
See Owner's Manual
Possible causes/consequences and
* For certain countries only: the maximum permissible speed has been
exceeded.
Drive more slowly.
#
* ATTENTION ASSIST has failed.
Consult a qualified specialist workshop.
#
* Based on certain criteria, ATTENTION ASSIST has detected fatigue or
increasing lapses in concentration on the part of the driver.
A warning tone also sounds.
If necessary, take a break.
#
On long journeys, take regular and timely breaks that allow you to rest
properly.
* An activation condition for Active Distance Assist DISTRONIC has not
been fulfilled.
Comply with the activation conditions for Active Distance Assist
#
DISTRONIC (
/
* Active Distance Assist DISTRONIC has been deactivated
(
page 154).
/
In the event of a deactivation not initiated by the driver, a warning
tone sounds as well.
* A warning tone also sounds. Active Distance Assist DISTRONIC is mal-
functioning. In addition, BAS may have failed.
Consult a qualified specialist workshop.
#
* A warning tone also sounds. Active Distance Assist DISTRONIC and
the limiter are malfunctioning.
Consult a qualified specialist workshop.
#
* You are accelerating. Active Distance Assist DISTRONIC does not
intervene for the duration of the acceleration process.
Remove your foot from the accelerator pedal.
#
Active Distance Assist DISTRONIC will be activated again.
* A warning tone also sounds.
Active Distance Assist DISTRONIC has been switched off and is tem-
porarily non-operational.
The following causes are possible:
The function is impaired due to heavy rain or snow.
R
The radar sensor system is temporarily non-operational, e.g. due
R
to electromagnetic radiation close to TV or radio transmitting sta-
tions or other sources of radiation.
The system is outside the operating temperature range.
R
The on-board electrical system voltage is too low.
R
T447 0414 02
Solutions
M
page 154).
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