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250 Display messages and warning and indicator lamps
Display messages
Active Distance Assist
Now Available
Cruise Control - - - mph
Cruise Control and Lim-
iter Inoperative
Blind Spot Assist Inoper-
ative
Blind Spot Assist Cur-
rently Unavail. See Oper-
ator's Manual
Possible causes/consequences and
The system is outside the operating temperature range.
R
The on-board electrical system voltage is too low.
R
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 (
#
Restart the engine.
#
* Active Distance Assist DISTRONIC is operational again following
temporary non-availability. You can now switch Active Distance
Assist DISTRONIC on again (
* 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).
/
* A warning tone also sounds. Cruise control and the limiter are mal‐
functioning.
Visit a qualified specialist workshop.
#
* Blind Spot Assist is malfunctioning.
Consult a qualified specialist workshop.
#
* Blind Spot Assist is temporarily non-operational.
The following causes are possible:
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
R
to electromagnetic radiation close to TV or radio transmitting
stations or other sources of radiation.
The system is outside the operating temperature range.
R
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 (
#
Restart the engine.
#
M M
Solutions
page 184).
/
page 117, 119).
/
page 184).
/
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