Display messages
Possible causes/consequences and
M
Solutions
Lane Keeping Assist
currently unavail.
See Owner's Man.
Lane Keeping Assist is deactivated and temporarily inoperative. Pos-
sible causes:
R
The windscreen is dirty in the camera's field of vision.
R
Visibility is impaired due to heavy rain, snow or fog.
R
There are no lane markings for an extended period.
R
The lane markings are worn away, dark or covered, e.g. by dirt or
snow.
Once the causes listed above no longer apply, the display message
goes out and Lane Keeping Assist is operational again.
If the display message does not disappear:
X
Pull over and stop the vehicle, paying attention to road and traffic
conditions.
X
Secure the vehicle against rolling away (
Y
page 177).
X
Clean the windscreen.
Cruise control
LDC_Spd_Dsr
speedUnit
A condition for activating cruise control has not been met.
You have tried to store a speed below 30 km/h for example.
X
If conditions permit, drive at a speed greater than 30 km/h and
store the speed.
X
Check the activation conditions for cruise control (
Y
page 187).
Cruise control and
SPEEDTRONIC inoper‐
ative
A warning tone also sounds. Cruise control and SPEEDTRONIC are
malfunctioning.
X
Visit a qualified specialist workshop.
Blind Spot Assist
inoperative
Blind Spot Assist is faulty.
X
Visit a qualified specialist workshop.
Blind Spot Assist
currently unavail.
See Owner's Manual
Blind Spot Assist is temporarily inoperative. Possible causes:
R
You have attached 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 inoperative, e.g. due to
electromagnetic radiation emitted by nearby TV or radio stations or
other sources of electromagnetic radiation.
R
The system is outside the operating temperature range.
Once the causes listed above no longer apply, the display message
goes out and Blind Spot Assist is operational again.
If the display message does not disappear:
X
Pull over and stop the vehicle, paying attention to road and traffic
conditions.
X
Secure the vehicle against rolling away (
Y
page 177).
X
Switch off the engine.
X
Clean the sensors in the rear bumper (
Y
page 342).
X
Restart the engine.
Display messages (vehicles with steering wheel buttons)
275
On-board computer and displays
Z