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252 Driving mode
if no or several, unclear lane markings are
R
present for one lane, e.g. near roadworks.
if the lane markings are worn, dark or cov‐
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ered, for example by dirt or snow.
if the distance to the vehicle in front is too
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small and the lane markings thus cannot be
detected.
if the lane markings change quickly, e.g. lanes
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branch off, cross one another or merge.
if the carriageway is very narrow and winding.
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if there are highly variable shade conditions
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on the road surface.
if attachments, e.g. a snow plough, restrict
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the camera's view of the road lane markings.
after a significant change in load with the
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ignition switched on. Therefore, start the
engine again after a significant change in load
for Lane Keeping Assist to be available with‐
out any restrictions.
Keep the windscreen in the area of the camera
free of dirt, snow or ice. Use the windscreen wip‐
ers or clean the windscreen by hand if required.
Observe the "Notes on cleaning the vehicle exte‐
rior" (
page 315) and "Cleaning sensors"
/
(
page 318) sections.
/
Overview
Example: Lane Keeping Assist button
The lane markings are displayed in the ë
Assistance
menu in the instrument cluster.
The lane markings in the instrument cluster show
the status of Lane Keeping Assist in colour:
grey lane markings: Lane Keeping Assist is
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deactivated or activated but not ready to
issue warnings on the affected side of the
vehicle.
white lane markings: Lane Keeping Assist is
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activated and ready to issue warnings on the
affected side of the vehicle.
red lane markings: Lane Keeping Assist is
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activated and is issuing a warning on the
affected side of the vehicle.
blue lane markings (only vehicles with Active
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Drive Assist): lateral distance control is acti‐
vated and ready to warn on the affected side
of the vehicle. The Lane Keeping function is
active (
page 257).
/
Functions and activation conditions
Lane Keeping Assist monitors the area in front of
your vehicle with a camera that is on the base of
the windscreen. When Lane Keeping Assist is
activated and it detects lane markings on the
roadway, it warns you that you may be leaving
your lane unintentionally.
The following conditions must be fulfilled so that
Lane Keeping Assist is ready to issue warnings:
you are driving faster than approx. 60 km/h.
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the lane markings must appear in white in the
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on-board computer.
The following interventions are carried out when
you drive over the lane marking unintentionally:
the relevant lane marking is shown in red in
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the on-board computer.
the volume of the audio equipment/hands-
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free system is reduced and an acoustic warn‐
ing sounds from the speaker on the corre‐
sponding side of the vehicle.
If the vehicle is not fully within the lane markings
after a warning has been issued, no further warn‐
ings are possible.
Lane Keeping Assist does not issue a warning in
the following situations:
you have switched on the turn signal indica‐
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tor.
you clearly and actively steer, brake or accel‐
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erate.
a driving safety system intervenes, e.g. Active
R
Brake Assist or Stability Control Assist.
The warnings are then suppressed for a certain
time period.
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