2010 Mercedes S-Class Owner's Manual - Page 364

362 Driving systems Lane Keeping Assist The Lane Keeping Assist supports you at a vehicle speed of above 40 mph when you have set the display unit to miles in the Display Unit Speed-/Odometer: menu in the control system (Y page 235). When you have set the display unit to km, the system supports you at a vehicle speed of above 60 km/h. When the Lane Keeping Assist detects lane markings, the system is designed to alert you in case you leave your lane unintentionally. A warning is usually issued when a front wheel is on the lane marking. An interval vibration in the steering wheel that lasts for up to 1.5 seconds will then alert you. The system does not issue a warning when Rsteering, braking, or accelerating in a clearly active manner, e.g. when changing lanes, passing, exiting a highway a narrow curve a very sharp turn Rcutting Rmaking Ra driving safety system such as the ABS, the BAS, or the ESC has been activated Controls in detail When setting the turn signal in either direction, the warning will be suppressed. The system will issue a warning if a turn signal has been on for an extended period of time. G Warning! The Lane Keeping Assist does not keep the vehicle in the lane. The Lane Keeping Assist is only an aid to the driver and may not always recognize lane markings properly or fail to recognize them at all. The system may be impaired or unavailable when Rvisibility is poor, e.g. due to snow, rain, fog, or heavy spray Roncoming traffic, sun glare or reflection from other vehicles camera area of the windshield is dirty, foggy, or otherwise obstructed markings are not present markings are worn, dark, or covered e.g. by snow or dirt short The Lane Keeping Assist monitors the area in front of your vehicle via camera :. The system can distinguish various conditions in order to alert you early enough and to avoid unnecessary warnings when crossing lane markings. The warning is issued sooner when Rcutting Rthe Rlane Rlane Rthe distance to the preceding vehicle is too Rwhen Rlane a curve on the outside of the turn Rdriving on very wide lanes such as highway lanes Rthe lane markings are ambiguous, for example in road work sections markings change rapidly, e.g. on highway exits or turn-off lanes are narrow and winding system recognizes dividing lines because crossing them is often crucial due to soft shoulders or guardrails behind for example on narrow lanes a curve on the inside of the turn Rlanes The warning is issued later however when Rdriving Rcutting The Lane Keeping Assist cannot take road and traffic conditions into account. It is the driver's responsibility at all times to be attentive to road, weather and traffic