Mercedes-Benz E CLASS 2020 Operator's Manual page 230

228 Driving and parking
highly variable shade conditions or in rain,
snow, fog or heavy spray.
If there is glare, e.g. from oncoming traffic,
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the sun or reflections.
If the windshield in the area of the multifunc‐
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tion camera is dirty, or if the camera is fog‐
ged up, damaged or covered.
If there are no lane markings, or several
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unclear lane markings are present for one
lane, e.g. around roadworks.
If the lane markings are worn, dark or cov‐
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ered.
If the distance to the vehicle in front is too
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short and thus the lane markings cannot be
detected.
If the lane markings change quickly, e.g.
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lanes branch off, cross one another or
merge.
If the roadway is very narrow and winding.
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Vehicles without Driving Assistance Pack‐
age or Driving Assistance Plus Package:
Active Lane Keeping Assist uses radar sensors
to monitor several areas around the vehicle. If
the radar sensors in the rear bumper are dirty or
covered with snow, the system may be impaired
or may not function. If an obstacle in the lane in
which you are driving has been detected, no
lane-correcting brake application occurs.
Activating/deactivating Active Lane Keeping
Assist (vehicles with Parking Assist
PARKTRONIC)
& WARNING Risk of accident despite
Active Lane Keeping Assist warning
A lane-correcting brake application cannot
always bring the vehicle back into the origi‐
nal lane.
Always steer, brake or accelerate your‐
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self, especially if Active Lane Keeping
Assist warns you or makes a lane-cor‐
recting brake application.
& WARNING Risk of accident despite inter‐
vention of Active Lane Keeping Assist
Active Lane Keeping Assist does not detect
traffic conditions or road users. In very rare
cases, the system may make an inappropri‐
ate brake application, e.g. after intentionally
driving over a solid lane marking.
The brake application can be interrupted at
any time if you steer slightly in the opposite
direction.
Always make sure that there is suffi‐
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cient distance to the side for other traf‐
fic or obstacles.
& WARNING Risk of accident despite Lane
Keeping Assist
Lane Keeping Assist cannot always clearly
detect lane markings.
In such cases, Lane Keeping Assist can:
give an unnecessary warning
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not give a warning
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Always pay particular attention to the
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traffic situation and keep within the
lane, especially if Active Lane Keeping
Assist alerts you.