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Display messages
Possible causes/consequences and
M
M
Solutions
R
The system is outside the operating temperature range.
R
The on-board electrical system voltage is too low.
If the causes mentioned above no longer apply, the display message
will disappear and Active Brake Assist will be operational again.
If the display message does not disappear:
#
Stop in accordance with the traffic conditions.
#
Secure the vehicle against rolling away.
#
Switch off the engine.
#
Clean the sensors in the front bumper (
/
page 184).
#
Restart the engine.
Active Distance Assist
Now Available
* Active Distance Assist DISTRONIC is operational again following
temporary non-availability. You can now switch Active Distance
Assist DISTRONIC on again (
/
page 117, 119).
Cruise Control - - - mph
* An activation condition for cruise control has not been met.
For example, you are aiming to store a speed below 20 mph
(30 km/h).
#
If conditions permit, drive at a speed greater than 20 mph
(30 km/h) and store the speed.
#
Observe the activation conditions for cruise control
(
/
page 115).
Cruise Control and Lim-
iter Inoperative
* A warning tone also sounds. Cruise control and the limiter are mal‐
functioning.
#
Visit a qualified specialist workshop.
Blind Spot Assist Inoper-
ative
* Blind Spot Assist is malfunctioning.
#
Consult a qualified specialist workshop.
Blind Spot Assist Cur-
rently Unavail. See Oper-
ator's Manual
* Blind Spot Assist is temporarily non-operational.
The following causes are possible:
R
You have coupled up a trailer.
R
The sensors in the rear bumper are dirty.
R
The function is impaired due to heavy rain or snow.
R
The radar sensor system is temporarily non-operational, e.g. due
to electromagnetic radiation close to TV or radio transmitting
stations or other sources of radiation.
R
The system is outside the operating temperature range.
If the causes mentioned above no longer apply, the display message
will disappear and Lane Keeping Assist will be operational again.
If the display message does not disappear:
#
Stop in accordance with the traffic conditions.
#
Secure the vehicle against rolling away.
#
Switch off the engine.
#
Clean the sensors in the rear bumper (
/
page 184).
#
Restart the engine.
250 Display messages and warning and indicator lamps