2011 MERCEDES-BENZ B-CLASS HATCHBACK Owners Manual

Driving to the final position
:
White lane indicating the route the vehicle
will take with the steering wheel in its cur-
rent position
; Parking space marking
X Turn the steering wheel to the centre posi-
tio nw hile the vehicle is stationary. :
Red guide line at a distance of approx-
imately 0.25 mfrom the rear of the vehicle
; White lane indicating the route the vehicle
will take with the steering wheel straight
= End of parking space
X Reverse carefully until you have reached
the end position.
Red guide line :is then at the end of park-
ing space =.The vehicle is almost parallel
in the parking space.
"Coupling up a trailer" function This function is only available on vehicles with
a trailer tow hitch and COMAND Online. :
Vehicle centre point on the yellow guide
line at a distance of approximately 1.0 m
from the rear of the vehicle
; Trailer drawbar
= Ball coupling
X Set the height of trailer drawbar ;so that
it is slightly higher than ball coupling =.
X Position the vehicle centrally in front of
trailer drawbar ;. :
Ball coupling
; Red guide line at a distance of approx-
imately 0.25 m from ball coupling
= Trailer drawbarm arker assistant
? Trailer drawbar
A Symbol for the "Coupling up a trailer"
function
X Select the symbol Awith the Audio/
COMAND controller; see th eseparate
operating instructions for the audio sys-
tem/COMAND Online.
The "Coupling up a trailer" function is selec-
ted. The distance specifications now only 174
Driving systemsDriving and parking

apply to objects that are at the same level
as the ball coupling.
X Reverse carefully, making sure that trailer
drawbar marke rassistant =points
approximately in the direction of trailer
drawbar ?.
X Reverse carefully until trailer drawbar ?
touches red guide line ;.
X Couple up the trailer (Y page 181).ATTENTION ASSIST
Introduction ATTENTION ASSIST helps you during long,
monotonous journeys such as on motorways
and trunk roads. It is active in the 80 km/h
to 180 km/h range.
If ATTENTION ASSIST detects typical indica-
tors of fatigue or increasing lapses in con-
centration on the part of the driver, it sug-
gests taking a break.
Important safety notes G
WARNING
ATTENTION ASSIST is only an aid and may
detect your tiredness or lapses in concentra-
tion too late or not at all. It is not asubstitute
for a well rested and attentive driver.
Fatigue may cause you to recognise hazard-
ous situations too late, misjudge a situation
or react slower. For this reason, make sure
you feel rested before you begin driving and
during your journey. Always take breaks in
good time and regularly, especially during
long journeys. Otherwise, you may fail to rec-
ognise dangers in time, cause an acciden tand
injure yoursel fand others. ATTENTIO
NASSIST assesses your level of
fatigue or lapses in concentration by taking
the following criteria into account:
R your personal driving style, e.g. steering
characteristics
R journey-related parameters, e.g. time of
day, length of journey
The functionality of ATTENTION ASSIST is
restricted, and warnings may be delayed or
not occur at all:
R if the road condition is poor, e.g. if the sur-
face is uneven or if there are potholes
R if there is a strong sid ewind
R if you have adopted a sporty driving style
with high cornering speeds or high rates of
acceleration
R if you are predominantly driving slower
than 80 km/h or faster than 180 km/h
R if you are currently using COMAND Online
or making a telephone call with COMAND
Online
R if the time has been set incorrectly
R in active driving situations, such as when
you change lanes or change your speed
Warning and display messages in the
multifunction display Example: vehicles with automatic transmission
X
Activate ATTENTION ASSIST using the on-
board computer (Y page 199).
Symbol :appears in the multifunction
display.
If ATTENTION ASSIST is active, it will not
warn you until at least 20 minutes after
your journey has begun. You the nhear an
intermittent warning tonet wice and the
Attention Assist: Drowsiness Driving systems
175Driving and parking Z

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

Indicator and warning display
G
WARNING
Blind Spo tAssist is not active at speeds below
30 km/h. The indicator lamps in the exterior
mirrors are yellow. Vehicles in the monitoring
range are then not indicated.
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. :
Yellow indicator lamp/red warning lamp
If Blind Spo tAssist is switched on, indicator
lamp :in the exterior mirrors lights up yel-
low up to a speed of 30 km/h. At speeds
above 30 km/h, the indicator lamp goes out
and Blind Spot Assist is operational.
If a vehicle is detected within the monitoring
range of Blind Spot Assist at speeds above
30 km/h, warning lamp :on the corre-
sponding side lights up in red. This warning is
always emitted when a vehicle enters the
blind spot monitoring range from behind or
from the side. When you overtake a vehicle,
the warning only occurs if the difference in
speed is less than 12 km/h.
The yellow indicator lamp goes out if reverse
gear is engaged. Blind Spot Assist is then
deactivated.
The brightness of the indicator/warning
lamps is adjusted automatically according to
the ambient light. Collision warning
If a vehicle is detected in the monitoring range
of Blind Spot Assist and you switch on the
corresponding turn signal, a double warning
tone sounds. Red warning lamp
:flashes. If
the turn signal remains on, detected vehicles
are indicated by the flashing of red warning
lamp :.There are no further warning tones.
Switching on Blind Spot Assist
X On vehicles without an integrated naviga-
tion system, make sure that the Becker ®
MAP PILOT is connected; see the separate
operating instructions for Audio 20.
X Make sure that the radar sensor system
(Y page 203) and Blind Spot Assist
(Y page 199) are activated in the on-board
computer.
X Turn the key to position 2in the ignition
lock.
Warning lamps :light up red in the exte-
rior mirrors for approximately 1.5 seconds
and then turn yellow.
Trailer towing
If you attach a trailer, make sure that you have
correctly established the electrical connec-
tion. This can be accomplished by checking
the trailer lighting. Blind Spot Assist is then
deactivated. The indicator lamp lights up yel-
low in the exterior mirrors and the Blind Spot Assist currently unavailable
See Owner's Manual message appears in
the multifunction display.
i You can deactivate the indicator lamps in
the exterior mirrors.
To do so, switch off Blind Spot Assist if:
R the key is in position 2in the ignition
lock.
R the engine is not running.
R the electrical connection to the trailer
has been established. Driving systems
179Driving and parking Z

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

When
Standard is selected, no warning vibra-
tion occurs if:
R you have switched on the turn signals. In
this event, the warnings are suppressed for
a certain period of time.
R a driving safety system intervenes, such as
ABS, BAS or ESP ®
.
When Adaptive is selected, no warning vibra-
tion occurs if:
R you have switched on the turn signals. In
this case, the warnings are suppressed for
a certain period of time.
R a driving safety system intervenes, such as
ABS, BAS or ESP ®
.
R you accelerate hard, e.g. kickdown.
R you brake hard.
R you steer actively, e.g. swerve to avoid an
obstacle or change lane quickly.
R you cut the corner on a sharp bend.
In order that you are warned only when nec-
essary and in good time if you cross the lane
marking, the system recognises certain con-
ditions and warns you accordingly.
The warning vibration occurs earlier if:
R you approach the outer lane marking on a
bend.
R the road has very wide lanes, e.g. a motor-
way.
R the system recognises solid lane markings.
The warning vibration occurs later if:
R the road has narrow lanes.
R you cut the corner on a bend. Towing
atrailer Notes on towing
atrailer
Important safety notes G
WARNING
When reversing the vehicle towards the
trailer, make sure there is nobody between
the trailer and the vehicle. Couple and uncouple the trailer carefully
.If
you do no tcouple the trailer to the towing
vehicle correctly, the trailer could become
detached.
Make sure that the following values are not
exceeded:
R the permissible trailer drawbar noseweight
R the permissible trailer load
R the permissible rear axle load of the towing
vehicle
R the maximum permissible gross vehicle
weight of both the towing vehicle and the
trailer
You will find the applicable permissible val-
ues, which must not be exceeded, in the vehi-
cle documents.
You will find the values approved by the man-
ufacturer on the vehicle identification plates
and those for the towing vehicle in the "Tech-
nical data" section. G
WARNING
If the Check trailer hitch locking mechanism message appears in the multi-
function display while the vehicle is in motion,
pull over immediately and check whether the
ball coupling is correctly engaged. G
WARNING
When towing a trailer, your vehicle's handling
characteristics will be different in comparison
to when driving without a trailer.
The vehicle/trailer combination:
R is heavier
R is restricted in its acceleration and gradi-
ent-climbing capability
R has an increased braking distance
R is affected more by strong crosswinds
R demands more sensitive steering
R has a larger turning circle
As a result, the handling characteristics may
be impaired and you may lose control of the
vehicle. This could lead to an accident with
serious or even fatal injuries. Towing
atrailer
181Driving an d parking
Z