Mercedes-Benz S-Class 2014 Owners Manual - Manual (Page 213)

The system may be impaired or may not
function if:
R there is poor visibility, e.g. due to
insufficient illumination of the road, or due
to snow, rain, fog or spray
R there is glare, e.g. from oncoming traffic,
the sun or reflections (e.g. when the road
surface is wet)
R the windshield is dirty, fogged up, damaged
or covered, for instance by a sticker, in the
vicinity of the camera
R there are no, several or unclear lane
markings for a lane, e.g. in areas with road
construction work
R the lane markings are worn away, dark or
covered up, e.g. by dirt or snow
R the distance to the vehicle in front is too
small and the lane markings thus cannot be
detected
R the lane markings change quickly, e.g.
lanes branch off, cross one another or
merge
R the road is narrow and winding
R there are strong shadows cast on the lane
Pay attention also to the important safety
notes for DISTRONIC PLUS (
Y
page 202).
The steering interventions are carried out
with a limited steering moment. The system
requires the driver to keep his hands on the
steering wheel and to steer himself.
If you do not steer yourself or if take your
hands off the steering wheel for a prolonged
period of time, the system will first alert you
with a visual warning. A steering wheel
symbol appears in the multifunction display.
If you have still not started to steer and have
not taken hold of the steering wheel after five
seconds, a warning tone also sounds to
remind you to take control of the vehicle.
DISTRONIC PLUS Steering Assist is then
switched to passive. DISTRONIC PLUS
remains active.
The system is switched to passive and no
longer assists you by performing steering
interventions if:
R you actively change lane
R you use a turn signal
R take your hands off the steering wheel or
do not steer for a prolonged period of time
i After you have finished changing lanes,
DISTRONIC PLUS Steering Assist is
automatically active once more.
DISTRONIC PLUS Steering Assist does not
provide assistance:
R on very sharp corners
R if no roadside markings or no clear roadside
markings have been detected
R if the vehicle in front is not detected at
speeds below 37 mph (60 km/h)
R in tire run-flat mode
Activating Steering Assist
X Press button ;.
Indicator lamp : lights up. The DTR+: DTR+:
Steering Assist. On Steering Assist. On message appears
in the multifunction display. Steering Assist
is activated.
Information in the multifunction display
Driving systems
211
Driving
and
parking
Z