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212 Driving systems<br />
Driving and parking<br />
Keeping Assist detects lane markings on the<br />
road and warns you before you leave your<br />
lane unintentionally. If you do not react to the<br />
warning, a lane-correcting application of the<br />
brakes can bring the vehicle back into the<br />
original lane.<br />
: Active Lane Keeping Assist camera<br />
If you select km on the on-board computer in<br />
the Display Unit Speed-/<br />
Odometer (Y page 229) function, Active Lane<br />
Keeping Assist is activated starting at a speed<br />
of 60 km/h. If the miles display unit is<br />
selected, the assistance range begins at<br />
40 mph.<br />
G Warning<br />
Active Lane Keeping Assist does not keep<br />
your vehicle in its lane. It is only an aid and<br />
may detect the lane markings on the road<br />
incorrectly or not at all.<br />
The system may be impaired or may not<br />
function if:<br />
Rseveral or no lane markings for a single lane<br />
are present.<br />
Rthere is poor visibility, e.g. due to<br />
insufficient illumination of the road, or due<br />
to snow, rain, fog or spray.<br />
Rthere is glare, e.g. from oncoming traffic,<br />
the sun, or reflection from other vehicles.<br />
Rthe windshield is dirty, fogged up or<br />
covered, for instance by a sticker, in the<br />
vicinity of the camera.<br />
Rthe lane markings are worn away, dark or<br />
covered up, e.g. by dirt or snow.<br />
Rthe distance to the vehicle in front is too<br />
small and the lane markings thus cannot be<br />
detected.<br />
Rthe lane markings on the road are unclear,<br />
e.g. near roadworks.<br />
Rthe lane markings change quickly, e.g.<br />
lanes branch off, cross one another or<br />
merge.<br />
Rthe road is narrow and winding.<br />
Active Lane Keeping Assist cannot detect<br />
road and traffic conditions. It is not a<br />
substitute for attentive driving. You are<br />
responsible for the vehicle's speed, braking in<br />
good time, and steering correctly. Always<br />
adapt your driving style to suit the prevailing<br />
road and weather conditions. Always pay<br />
attention to traffic conditions and your<br />
surroundings. Otherwise, you may fail to<br />
recognize dangers in time, cause an accident<br />
and injure yourself and others.<br />
Warning vibration in the steering wheel<br />
A warning can be given when a front wheel<br />
passes over a lane marking. It will warn you<br />
by means of intermittent vibration in the<br />
steering wheel for up to 1.5 seconds.<br />
In order that you are warned only when<br />
necessary and in good time if you cross the<br />
lane marking, the system recognizes certain<br />
conditions and warns you accordingly.<br />
The warning vibration occurs earlier if:<br />
Ryou approach the outer lane marking on a<br />
bend.<br />
Rthe road has very wide lanes, e.g. a<br />
freeway.<br />
Rthe system recognizes solid lane markings.<br />
The warning vibration occurs later if:<br />
Rthe road has narrow lanes.<br />
Ryou cut the corner on a bend.<br />
No warning vibration occurs if:<br />
Ryou clearly and actively steer, brake, or<br />
accelerate.<br />
Ryou cut the corner on a sharp bend.