Lane assist systems
In addition, corrective steering inputs are indica-
ted in the instrument cluster by a red line 2 on
the corresponding side.
ing. Be prepared to assume control at all
times.
The steering wheel may also vibrate to warn you
if the detected lane demarcations are crossed.
You can switch steering wheel vibration on/off in
the Driver assist menu ðpage 134.
System limits of the lane departure
warning
If lights up, the lane departure warning
function is switched on but not ready to give
warnings. This may happen if the following sys-
tem limits or events occur:
The steering will not be corrected and the steer-
ing wheel will not vibrate if the system detects a
situation where it is clear that an overtaking ma-
noeuvre is intended.
– The system works at speeds of approx.
2)
65 km/h and above. It is not available at very
1)
high speeds.
Response when turn signals are on
– The system cannot detect the necessary lane
markings (e.g. in roadworks or due to snow,
dirt, rain or glare).
Applies to vehicles without side assist: The sys-
tem does not warn you if you operate the turn
signal before crossing a lane demarcation. In this
case, it assumes that you intend to change lanes.
– The lane is too narrow or too wide.
– The bend is too tight.
Applies to vehicles with side assist: If you operate
the turn signal while the lane departure warning
is active, the steering will be corrected noticeably
just before you cross the lane demarcation if the
side assist detects vehicles approaching quickly
or travelling at about the same speed as your
own vehicle and judges the situation to be criti-
cal. This intervention is intended to keep the ve-
hicle in the lane.
– The vision at a hill crest/valley is insufficient.
– The turn signal was activated.
– The ESC is restricted or switched off.
WARNING
Please note the safety precautions and system
limits of the supporting systems, sensors and
cameras ðpage 130 to ðpage 132.
WARNING
Take over steering prompts from the lane
departure warning
– Please note the safety precautions and sys-
tem limits of the supporting systems, sen-
sors and cameras ðpage 130 to
No steering activity detected
If no steering activity is detected, you will be
warned by acoustic and visual signals to take over
the steering. Actively take over the steering im-
mediately and keep your hands on the steering
wheel so that you are ready to steer at all times.
ðpage 132.
– The system initiates a corrective steering in-
put to warn you that the vehicle is about to
leave the lane. It is always the driver's re-
sponsibility to keep in the lane. Always keep
your hands on the steering wheel and be
ready to steer at all times.
If you do not take over the steering, the emer-
gency assist will be activated on vehicles which
have this function ðpage 160.
– The lane departure warning is not designed
to avoid collisions with physical lane delin-
eators, such as concrete barriers.
Drive in lane centre
If the lane departure warning system has to in-
tervene for a long time, a message will appear
asking you to drive in the centre of the lane.
– In certain situations, e.g. during heavy brak-
ing, the system may not correct the steer-
1)
Depends on country/equipment fitted in the vehicle
2)
55 km/h in certain countries
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English 
