Mercedes-Benz E-Class Sedan Operator's Manual page 199

You have adopted a sporty driving style with
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high cornering speeds or high rates of accel‐
eration.
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ESP is deactivated.
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When driving with a trailer, the electrical con‐
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nection to the trailer has been correctly
established.
If a loss of tire pressure or a defective tire
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has been detected and displayed.
The system may be impaired or may not function
in the following situations:
There is poor visibility, e.g. due to insufficient
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illumination of the road, highly variable shade
conditions, or due to rain, snow, fog or heavy
spray.
There is glare, e.g. from the sun, reflections
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or oncoming traffic.
There is dirt on the windshield in the vicinity
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of the multifunction camera or the camera is
fogged up, damaged or obscured.
No or several, unclear lane markings are
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present for one lane, e.g. in a construction
area.
The lane markings are worn, dark or covered.
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The distance to the vehicle in front is too
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small and the lane markings thus cannot be
detected.
The lane markings change quickly, e.g. lanes
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branch off, cross one another or merge.
The road is very narrow and winding.
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Vehicles with Driving Assistance package 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-cor‐
recting brake application occurs.
Switching on Active Lane Keeping Assist
& 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.
Driving and parking 197
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.