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Operation
If the driver does not react to this, the system
al
so al
er
ts the driver with a little shaking mo-
tion through the brakes and, if the vehicle
has it, activates the Emergency Assist func-
tion ››› page 222.
In vehicles without Emergency Assist, the
adaptive lane guidance function will be disa-
bled after the corresponding warnings to the
driver.
The lane assist system is active but it is not
available (the control lamp is lit up yellow)
●
When driving at speeds below 65 km/h (38
mph).
●
When the Lane Assist system does not de-
tect the dividing lines of the road. For exam-
ple, in the event warnings indicating road
works, and snow, dirt, moisture or reflec-
tions.
●
When the radius of a curve is too small.
●
When no road markings can be seen.
●
When the distance to the next marking to
too great.
●
When the system does not detect any clear
and active steering movement during a long
period of time.
●
Temporarily, in the event of very dynamic
driving styles.
●
If a turn signal is activated.
●
With the stability control system (ESC) in
Sport mode or switched off.
Side Assist PLUS
If the vehicle is also equipped with Side As-
sist and the system is switched on, the driver
is alerted when changing lanes during a pos-
sible critical situation (level of information,
warning level) through a corrective steering
wheel intervention. This occurs even if the
turn signal is activated in the corresponding
direction. If the driver over-regulates the
steering wheel intervention, an additional
warning is given through a vibration in the
steering wheel.
Note
●
Befor
e starting a journey, verify that the
field of vision of the camera is not covered
››› Fig. 193.
●
Always keep the field of vision of the cam-
era clean.
Switching off the Lane Assist system
in the f
o
l
lowing situations
Due to the limits of the Lane Assist system,
sw
it
c
h it off in the following situations:
●
When more attention is required of the
driver
●
When driving in a sporty style
●
In unfavourable weather conditions
●
On roads in poor condition
●
In areas of road works
Traffic Jam Assist
Description and operation
›››
table on page 2
Traffic Jam Assist helps the driver keep the
car within its lane and to move in convoy in
case of traffic congestion or slow traffic.
Traffic Jam Assist is an additional function of
Lane Assist
›››
page 217 and combines Lane
Assist functions with Adaptive Cruise Control
(ACC)
›››
page 201. Therefore, it is essential
that you read these two chapters carefully
and note the limitations of the systems and
the information about them.
Operation of Traffic Jam Assist
At speeds of below 60 km/h (40 mph), Traffic
Jam Assist can maintain a (temporary) dis-
tance preset by the driver with respect to the
vehicle ahead and help stay within the lane
›››
.
T
o do thi
s, the sy
stem automatically controls
the acceleration, brakes and steering, and
slows down the vehicle until it stops fully
when behind another vehicle that is stop-
ping. It then automatically moves off again
when the car in front does so.
220
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