2011 MERCEDES-BENZ B-CLASS HATCHBACK lane assist

detected message appears in the multi-
function display.
X If necessary, take a break.
X Press the abutton to confirm the mes-
sage.
On long journeys, take regularb reaks in good
time to allow yourself to rest properly.Ify ou
do not take a break, you will be warned again
after 15 minutes at the earliest. The precon-
dition for this is that ATTENTION ASSIST still
detects typical indicators of fatigue or
increasing lapses in concentration.
ATTENTION ASSIST is reset and starts
assessing your tiredness again when you con-
tinue your journey if:
R you switch off the engine.
R you take off your seat belt and open the
driver's door, e.g. for a change of drivers or
to take a break. Speed Limit Assist
General notes Speed Limit Assist shows you detected speed
limits in the multifunction display .Data from
the navigation system is also used for this
purpose. If a traffic sign indicating a speed
limit or the end of a speed limit is detected,
it is shown in the multifunction display. If
Speed Limit Assist does no tdetec tany traffic
signs, the speed limit from the digital road
map is take nand shown in the display.
Speed Limit Assist detects the traffic signs
with a camera attached behind the top of the
windscreen. :
Speed Limit Assist camera
Important safety notes G
WARNING
Speed Limit Assist is onl yanaid and may
detect speed limit signs incorrectly or not at
all.
The system may be impaired or may not func-
tion if:
R there is poor visibility, e.g. due to snow,
rain, fog or spray.
R there is glare, e.g. from the sun or from
oncoming traffic.
R the windscreen is dirty, misted up or cov-
ered, for instance by a sticker, in the vicinity
of the camera.
R the traffic signs are covered, for instance
by dirt, snow or trees.
R the traffic signs are poorly illuminated.
R there are ambiguous traffic signs, for
instance near roadworks or on multi-lane
roads.
Traffic signs always have priority over the
Speed Limit Assist display. Speed Limit Assist
cannot detect road and traffic conditions. It is
not a substitute for attentive driving.
Always pay attention to traffic conditions and
your surroundings. Otherwise, you may fail to
recognise dangers in time, cause an accident
and injure yourself and others. 176
Driving systemsDriving and parking

Information in the multifunction display
Example: vehicles with automatic transmission
: Traffic sign indicating aspeed limit or the
end of a speed limit (example)
; Speed Limit Assist is available and the
warning function is switched on in the on-
board computer
= Units used in the traffic sign displayed
Briefly showing detected traffic signs in
the multifunction display
X Activate the Speed Limit Assist warning
function using the on-board computer
(Y page 198).
Symbol ;appears.
At raffic sign indicating a speed limi torthe
end of a speed limit :appears in the mul-
tifunction display for around five seconds
as soon as it is detected. Any other infor-
mation in the multifunction display is hid-
den for this period.
Permanently showing detected traffic
signs in the multifunction display
X Display Speed Limit Assist using the on-
board computer (Y page 198).
At raffic sign indicating a speed limi torthe
end of a speed limit :appears in the mul-
tifunction display as soon as it is detected.
Traffic sign indicating a speed limit :is
generally displayed until:
R a traffic sign indicating the end of the
speed limit is detected.
R you make a turn.
R you leave or enter a town. R
the road type changes (e.g. motorway,
country road).
R you have travelled a certain minimum
distance without the traffic sign being
repeated or detected again.
i You can also activate Speed Limit Assist
using COMAND Online. The maximum per-
missible speed is shown in the COMAND
display; see the COMAND Online operating
instructions. Lane Tracking package
General notes The Lane Tracking package consists of Blind
Spot Assist (Y
page 177) and Lane Keeping
Assist (Y page 180).
Blind Spot Assist General notes
Blind Spot Assist uses a radar sensor system
to monitor the areas on both sides of your
vehicle. It supports you from speeds of
30 km/h. A warning display in the exterior
mirrors draws your attention to vehicles
detected in the monitored area. If you then
switch on the corresponding turn signal to
change lane, you will also receive an optical
and audible collision warning. For this pur-
pose, Blind Spot Assist uses sensors in the
rear bumper.
Important safety notes
G
WARNING
Blind Spot Assist is only an aid designed to
assist driving. It may fail to detect some vehi-
cles and is no substitute for attentive driving.
Blind Spot Assist cannot detect road and traf-
fic conditions. It may fail to detect narrow
vehicles, such as motorcycles or bicycles, or
only detect them too late.
Monitoring may be affected by dirty sensors,
strong spray or poor visibility caused by snow, Driving systems
177Driving and parking
Z

rain or mist, for example. In this case, vehicles
are detected late or not at all.
Always pay attention to traffic conditions and
yours
urroundings. Otherwise, you may fail to
recognise dangers in time, cause an accident
and injure yourself and others.
The radar sensor system is automatically
deactivated near radio telescope facilities
(Y page 320).
For Blind Spo tAssist to assist you when driv-
ing, the radar sensor system must be activa-
ted (Y page 203) and operational.
Monitoring range of the sensors G
WARNING
Blind Spot Assist monitors certain areas in the
immediate vicinity of your vehicle. Vehicles
that approach and drive past at high speeds
are not detected. There is no display and no
warning.
If the lanes are very wide, it may not be pos-
sible to monitor the complete width of the
neighbouring lane. For this reason, vehicles in
the next lane may not be detected, especially
if they are driving in a staggered formation in
different lanes. This may be the case if vehi-
cles are driving at the edge of their lane that
is furthest away from your vehicle.
Always pay attention to traffic conditions and
your surroundings. Otherwise, you may fail to
recognise dangers in time, cause an accident
and injure yourselfa nd others. Blind Spo
tAssist monitors the area up to
three metres behind your vehicle and directly
next to your vehicle as shown in the diagram.
If the lanes are narrow, vehicles driving in the
lane beyond the lane next to your vehicle may
be indicated, especially if the vehicles are not
driving in the middle of their lane. This may
be the case if the vehicles are driving on the
inner side of their lane.
Due to the nature of the system:
R warnings may be issued in error when driv-
ing close to crash barriers or similars olid
lane borders.
R warnings may be interrupted when driving
alongside long vehicles, for example lor-
ries, for a prolonged time.
The two sensors for Blind Spot Assist are
integrated into the sides of the rear bumper.
Make sure that the bumper is free of dirt, ice
or slush in the vicinit yofthe sensors. The
radar sensors must not be covered, for exam-
ple by cycle racks or overhanging loads. Fol-
lowing a severe impact or in the event of dam-
age to the bumpers, have the function of the
radar sensors checked at aqualified special-
ist workshop. Blind Spot Assist may other-
wise no twork properly. 178
Driving systemsDriving and parking

Lane Keeping Assist
General notes
Lane Keeping Assist monitors the area in
fron tofy our vehicle by means of a camera at
the top of the windscreen .Lane Keeping
Assist detects lane markings on the road and
warns you before you leave your lane unin-
tentionally. :
Lane Keeping Assist camera
If you select km on the on-board computer in
the Display unit Speed-/odometer: function (Y
page 200), Lane Keeping Assist
is active starting at aspeed of 60 km/h. If the
miles display unit is selected, the assistance
range begins at 40 mph.
Important safety notes G
WARNING
Lane Keeping Assist does not keep your vehi-
cle in its lane. It is only an aid and may detect
the lane markings on the road incorrectly or
not at all.
The system may be impaired or may not func-
tion if:
R there is poor visibility, e.g. due to insuffi-
cient illumination of the road, or due to
snow, rain, fog or spray.
R there is glare, e.g. from oncoming traffic,
the sun, or reflection from other vehicles.
R the windscreen is dirty, misted up or cov-
ered, for instance by a sticker, in the vicinity
of the camera
R several or no lane markings for a single lane
are present. R
the lane markings are worn away, dark or
covered up, e.g. by dirt or snow.
R the distance to the vehicle in front is too
small and the lane markings thus cannot be
detected.
R the lane markings on the road are unclear,
e.g. near roadworks.
R the lane markings change quickly, e.g.
lanes branch off, cross one another or
merge.
R the road is narrow and winding.
Lane Keeping Assist cannot detect road and
traffic conditions. It is not a substitute for
attentive driving. You are responsible for the
vehicle's speed, braking in good time, and
steering correctly. Always adapt your driving
style to suit the prevailing road and weather
conditions. Always pay attention to traffic
conditions and your surroundings. Otherwise,
you may fail to recognise dangers in time,
cause an acciden tand injure yoursel fand oth-
ers.
A warning may be given if a front wheel
passes ove ralane marking. It will warn you
by means of intermittent vibration in the
steering wheel for up to 1. 5seconds.
Activating Lane Keeping Assist Example: vehicles with automatic transmission
X
Switch on Active Lane Keeping Assist using
the on-board computer; to do so, select
Standard or
Adaptive (Y
page 199).
Symbol :appears in the multifunction
display.
If you drive at speeds above 60 km/h and
lane markings are detected, symbol :is
highlighted. Lane Keeping Assist is ready
for use. 180
Driving systemsDriving and parking

?
Menu bar
A Drive program
B Transmission position
X To show menu bar ?:press the =
or ; button on the steering wheel.
Menu bar ?is hidden after a few seconds.
Text field =shows the selected menu or
submenu as well as display messages.
i You can set the time using Audio 20 or
COMAND Online, see the separate Operat-
ing Instructions.
The following messages can appearint he
multifunction display:
Z Shift recommendation
(Ypage 134)
XjY Active Parking Assist
(Ypage 166)
¯ Cruise control (Y page 149)
LIM SPEEDTRONIC (Y
page 151)
è Rear window wiper
(Ypage 109)
_ Adaptive Highbeam Assist
(Ypage 101)
À ATTENTION ASSIST
(Ypage 175)
¤ ECO start/stop function
(Ypage 129)
Ä Speed Limit Assist
(Ypage 176)
à Lane Keeping Assist
(Ypage 180)
ë HOLD function (Y page 162)
Ä Distance warning signal
(Ypage 63)
120 km/h! Maximum permissible speed
exceeded (only for certain coun-
tries) Displays and operation
191On-board computer and displays Z

X
Press the 6ora button to start dial-
ling.
or
X If you do not want to make a call: press
the ~ or% button. Assistance menu
Introduction In the
Assist. menu, you have the following
options:
R show Speed Limit Assist and activate/
deactivate its message function
R show distance display
R activate/deactivate ESP ®
R activate/deactivate the distance warning
signal
R activate/deactivate ATTENTION ASSIST
R activate/deactivate Blind Spot Assist
R activate/deactivate Lane Keeping Assist
Speed Limit Assist Displaying Speed Limit Assist
X
Press the =or; button on the steer-
ing wheel to select the Assist. menu.
X Press the 9or: button to select
Speed Lim. Asst. .
X Press a.
Under certain conditions (Y page 176),
detected speed limits are shown in the mul-
tifunction display. Activating/deactivating the Speed Limit
Assist message function
X
Press the =or; button on the steer-
ing wheel to select the Assist. menu.
X Press the 9or: button to select
Speed Lim. Asst. .
X Press the abutton.
The multifunction display shows Speed
Limit Assist.
X Press the :button.
The curren tselection is displayed.
X To activate or deactivate: pressa.
If the Speed Limit Assist message function
is activated, a detected speed limit is auto-
matically displayed for five seconds. Other
items in the multifunction display are not
shown during this time.
If Speed Limit Assist is operational and the
message function is activated, the multifunc-
tion display shows the Äsymbol when the
ignition is switched on.
Showing the distance display X
Press the =or; button on the steer-
ing wheel to select the Assist. menu.
X Press the 9or: button to select
Distance display .
X Press a.
The DISTRONIC PLUS distance display
appears in the multifunction display
(Y page 157).
Deactivating/activating ESP ® G
WARNING
If the ÷ warning lamp in the instrument
cluster flashes, proceed as follows:
R Under no circumstances should you deac-
tivate ESP ®
.
R When pulling away, only depress the accel-
erator pedal as far as is necessary.
R Adapt your driving style to the prevailing
road and weather conditions. 198
Menus and submenusOn-board computer and displays

The vehicle may otherwise begin to skid.
If you drive too fast, ESP ®
cannot reduce the
risk of an accident. ESP ®
cannot override the
laws of physics. G
WARNING
If the å warning lamp in the instrument
cluster lights up when the engine is running,
ESP ®
is deactivated or is unavailable due to a
malfunction. The risk that your vehicle may
start to skid then increases in certain situa-
tions.
Always adapt your driving style to the prevail-
ing road and weather conditions.
For further information about ESP ®
, see
(Y page 66).
X Start the engine.
X Press =or; on the steering wheel
to select the Assist. menu.
X Press 9or: to select ESP .
X Press the abutton.
X To deactivate: pressaagain.
The å warning lamp in the instrument
cluster comes on.
X To activate: pressaagain.
The å warning lamp in the instrument
cluster goes out.
Activating/deactivating the distance
warning signal X
Press the =or; button on the steer-
ing wheel to select the Assist. menu.
X Press 9or: to select Dist. warn‐
ing .
X Press the abutton.
The curren tselection is displayed.
X To activate/deactivate: pressa
again.
When the distance warning signal is activa-
ted, the multifunction display shows the
Ä symbol if the HOLD function is not acti-
vated (Y page 162). Vehicles with Active Parking Assist:
if
PARKTRONIC is activated and you are driving
at a speed under 35 km/h, the jActive
Parking Assist symbol is shown instead of the
Ä symbol ( Ypage 166).
For further information on the distance warn-
ing signal, see (Y page 63).
Activating/deactivating ATTENTION
ASSIST X
Press the =or; button on the steer-
ing wheel to select the Assist. menu.
X Press the 9or: button to select
Attention Asst. X
Press a.
The curren tselection is displayed.
X To activate/deactivate: pressa
again.
When ATTENTION ASSIST( Ypage 175) is
activated, the Àsymbol appears in the
multifunction display when the ignition is on.
Activating/deactivating Blind Spot
Assist X
Press the =or; button on the steer-
ing wheel to select the Assist. menu.
X Press the 9or: button to select
Blind Spot Asst. .
X Press a.
The curren tselection is displayed.
X To activate/deactivate: pressa
again.
For further information about Blind Spot
Assist, see (Y page 177).
Activating/deactivating Lane Keeping
Assist X
Press the =or; button on the steer-
ing wheel to select the Assist. menu.
X Press the 9or: button to select
Lane Keep. Asst. Menus and submenus
199On-board computer and displays Z

X
Press a.
The curren tselection is displayed.
X Press the abutton to confirm.
X Press :or9 to set Off ,
Standard or
Adaptive .
X Press the abutton to save the setting.
If Lane Keeping Assist is activated
(Y page 180)a nd the ignition is switched on,
the à symbol appears in the multifunction
display. Service menu
In the
Service menu, you have the following
options:
R call up display messages (Y page 205)
R restarting the tyre pressure loss warning
system (Y page 297)
R calls up when a service is due
(Y page 266) Settings menu
Introduction In the
Settings menu, you have the following
options:
R change the instrument cluster settings
R change the light settings
R change the vehicle settings R
change the convenience settings
R restore the factory settings
Instrument cluster Selecting the uni
tofmeasurement for dis-
tance
You can determine whether the multifunction
display shows some messages in miles or kil-
ometres.
X Press the =or; button on the steer-
ing wheel to selec tthe Settings menu.
X Press the :or9 button to select the
Inst. cluster submenu.
X Press the abutton to confirm.
X Press the :or9 button to select the
Display unit Speed-/odometer: func-
tion.
You will see the selected setting: km or
miles .
X Press the abutton to save the setting.
The selected unit of measurement for dis-
tance applies to:
R the digital speedometer in the Trip menu
R the total distance recorder and the trip
meter
R the trip computer
R the current consumption and the range
R the navigation instructions in the Navi menu
R cruise control
R SPEEDTRONIC
R DISTRONIC PLUS
R ASSYST PLUS service interval display
Switching the additional speedometer
on/off
Only vehicles with manual transmission have
this function.
X Press the =or; button on the steer-
ing wheel to select the Settings menu.
X Press the :or9 button to select the
Inst. cluster submenu.200
Menus and submenusOn-board computer and displays