display MERCEDES-BENZ B-CLASS HATCHBACK 2011 Workshop Manual

Range of the sensors
General notes
:
Example: sensors in the front bumper,
left-hand side Side view
Top view
The sensors mus
tbe free of dirt, ice and
slush. Otherwise, they may not function cor-
rectly. Clean the sensor sregularly, taking
care not to scratch or damage them
(Y page 270).
Front sensors Centre approximately 100 cm
Corners approximately 60 cm Rear sensors
Centre approximately 120 cm
Corners approximately 80 cm
Minimum distance
Centre approximately 20 cm
Corners approximately 20 cm
If there is an obstacle within this range, the
relevant warning displays light up and a warn-
ing tone sounds. If the distance falls below
the minimum, the distanc
emay no longer be
shown.
Warning displays The warning displays show the distance
between the sensors and th
eobstacle. The
warning display for the fron tarea is located
on the dashboard above the centre air vents.
The warning display for the rear area is loca-
ted on the roof lining in the rear compart-
ment. Warning display for the front area
:
Segments on the left-hand side of the
vehicle
; Segments on the right-hand side of the
vehicle
= Segments showing operational readiness
The warning display for each side of the vehi-
cle is divided into five yellow and two red seg-
ments. PARKTRONIC is operational if yellow
segments showing operational readiness =
light up. 164
Driving systemsDriving and parking

The gear lever position or the transmission
position of the automatic transmission and
the direction in which the vehicle is rolling
determine which warning display is active
when the engine is running.
Manual transmission: Gear lever posi-
tion Warning display
Forwards gear
or
Neutral
Front area activated
Reverse gear, or
the vehicle is rolling
backwards Rear and front areas
activated
Automatic transmission:
Transmission
position Warning display
D
Front area activated
R,
Nor the vehicle
is rolling back-
wards Rear and front areas
activated
P
No areas activated
One or more segments light up as the vehicle
approaches an obstacle, depending on the
vehicle's distance from the obstacle.
From the:
R sixth segment onwards, you will hear an
intermittent warning tonef or approx-
imately two seconds.
R seventh segment onwards, you will hear a
warning tone for approximately two sec-
onds. This indicates that you have now
reached the minimum distance. Deactivating/activating PARKTRONIC :
Indicator lamp
; To deactivate/activate PARKTRONIC
If indicator lamp :lights up, PARKTRONIC is
deactivated.
i PARKTRONIC is automatically activated
when you turn the key to position 2in the
ignition lock.
Towing atrailer !
Fold in the ball coupling if the trailer tow
hitch is not required .PARKTRONIC meas-
ures the minimum detection range to an
obstacle fro mthe bumper, not the ball cou-
pling.
PARKTRONIC is deactivated for the rear area
when you establish an electrical connection
between your vehicle and a trailer. Driving systems
165Driving and parking Z

Problems with PARKTRONIC
Problem Possible causes/consequences and
M Solutions
Only the red segments
in the PARKTRONIC
warning displays are lit.
You also hear a warning
tone for approximately
two seconds.
PARKTRONIC is deacti-
vated after approx-
imately 20 seconds,
and the indicator lamp
in the PARKTRONIC
button lights up. PARKTRONIC has malfunctioned and has switched off.
X
If problems persist, have PARKTRONIC checked at a qualified
specialist workshop. Only the red segments
in the PARKTRONIC
warning displays are lit.
PARKTRONIC is deacti-
vated after approx-
imately 20 seconds. The PARKTRONIC sensors are dirty or there is interference.
X
Cleant he PARKTRONIC sensors (Y page 270).
X Switch the ignition back on. The problem may be caused by an external source of radio or
ultrasound waves.
X
See if PARKTRONIC functions in a different location. Active Parking Assist
General notes Active Parking Assist is an electronic parking
aid with ultrasound. Ultrasound is used to
measure the road on both sides of the vehicle.
As uitable parking space is indicated by the
parking symbol. Active steering intervention
can assis tyou during parking.
You may also use PARKTRONIC
(Y page 163). When PARKTRONIC is switched
off, Active Parking Assist is also unavailable.
Use Active Parking Assist for parking spaces:
R that are parallel to the direction of travel
R that are on straight roads, not bends
R that are on the same level as the road, e.g.
not on the pavement Important safety notes G
WARNING
Active Parking Assist is merely an aid and may
sometimes recommend parking spaces that
are not suitable for parking. For example,
these might be spaces where parking is pro-
hibited, driveways, unsuitable surfaces, etc.
Active Parking Assist measures the parking
space as you drive past it. Any later changes
to the parking space are not taken into
account. For instance, this may be the case
when the vehicle parked in front of or behind
the space changes its position or when an
obstacle is moved into the parking space.
Active Parking Assist does not relieve you of
the responsibility of paying attention. If you
rely solely on Active Parking Assist, you could
cause an accident and injure yourself and oth-
ers. 166
Driving systemsDriving and parking

displays parking spaces on the front-
passenger side as standard. Parking spaces
on the driver's side are displayed as soon as
the turn signal on the driver's side is activa-
ted. To park on the driver's side, you must
leave the driver's side turn signal switched
on. This must remain switched on until you
acknowledge the use of Active Parking Assist
by pressing the abutton on the multi-
function steering wheel.
When a parking space has been detected, an
arrow towards the right or the left also
appears. Example: detected parkin
gspace for a vehicle with
automatic transmission
: Detected parking space on the left
; Parking symbol
= Detected parking space on the right
Active Parking Assist will only detec tparking
spaces:
R that are parallel to the direction of travel
R that are at least 1.5 m wide
R that are at least 1.0 m longer than your
vehicle
Ap arking space is displayed while you are
driving past it, and until you are approx-
imately 15 m away from it.
Parking G
WARNING
PARKTRONIC and Active Parking Assist are
merely parking aids and may no tdetec tall
obstacles. They do not relieve you of the
responsibility of paying attention.
You are always responsible for safety and
must continue to pay attention to your imme-
diate surroundings when parking and manoeuvring. You could, otherwise, endanger
yourself and others.
G
WARNING
When parking, you need to make sure that no
obstacles are located in the vicinity of the
vehicle during the entire operation. Active
Parking Assist does not relieve you of the
responsibility of paying attention. It merely
aids you by intervening actively in the steer-
ing.
To stop the vehicle or avoid an accident you
need to apply the brakes yourself.
X Stop the vehicle when the parking space
symbol shows the desired parking space in
the instrument cluster.
X Vehicles with manual transmission :shift to
reverse gear.
Vehicles with automatic transmission: shift
into position R.
The Start Park Assist? Yes: OK No: %
message appears in the multifunction
display.
X To cancel the procedure: press the
% button on the multifunction steering
wheel or pull away.
or
X To parku sing Active Parking Assist:
press the abutton on the multifunction
steering wheel.
The Park Assist active Accelerate and brake Observe surroundings mes-
sage appears in the multifunction display.
X Let go of the multifunction steering wheel.
X Reverse the vehicle, being ready to brake
at all times. When reversing, do not exceed
a speed of approximately 10 km/h. Other-
wise, Active Parking Assist will be deacti-
vated.
i In tight parking spaces, you will achieve
the best parking results by backing up as 168
Driving systemsDriving and parking

far as possible
.When doing so, also
observe the PARKTRONIC messages.
X Stop as soon as PARKTRONIC sounds the
continuous warning tone, if not before.
Manoeuvring may be required in tight park-
ing spaces.
Vehicles with manual transmission: the ParkAssist active Engage forward gear
Observe surroundings message appears in
the multifunction display.
Vehicles with automatic transmission: the
Park Assist active Select D Observe
surroundings message appears in the mul-
tifunction display.
X Vehicles with manual transmission: while
the vehicle is stationary, shift to first gear.
Vehicles with automatic transmission:
select transmission position Dwhile the
vehicle is stationary.
Active Parking Assist immediately steers in
the other direction.
The Park Assist active Accelerate and brake Observe surroundings mes-
sage appears in the multifunction display.
i You will achieve the best results by wait-
ing for the steering procedure to complete
before pulling away.
X Drive forwards and be ready to brake at all
times.
X Stop as soon as PARKTRONIC sounds the
continuous warning tone, if not before.
Vehicles with manual transmission: the ParkAssist active Engage reverse gear
Observe surroundings message appears in
the multifunction display.
Vehicles with automatic transmission: the
Park Assist active Select R Observe
surroundings message appears in the mul-
tifunction display.
X Further transmission shifts may be neces-
sary.
As soon as the parking procedure is com-
plete, the Park Assist switched off message appears in the multifunction dis- play.A
ctive Parking Assist is now deacti-
vated. PARKTRONIC is still available.
X Manoeuvre if necessary.
X Always observe the warning messages dis-
played by PARKTRONIC (Y page 164).
Cancelling Active Parking Assist You can cancel Active Parking Assist at any
time.
X
Stop the movement of the multifunction
steering wheel or stee ryourself.
Active Parking Assist will be cancelled at
once. The Park Assist cancelled mes-
sage appears in the multifunction display.
or
X Press the PARKTRONIC button on the
centre console (Y page 165).
PARKTRONIC is switched off and Active
Parking Assist is immediately cancelled.
The Park Assist cancelled message
appears in the multifunction display.
Active Parking Assist is cancelled automati-
cally if:
R a gear is changed/the transmission is shif-
ted too early.
R parking using Active Parking Assist is no
longer possible.
R you are driving faster than 10 km/h.
R a wheel spins and ESP ®
intervenes or fails.
The ÷ warning lamp lights up in the
instrument cluster.
Aw arning tone sounds. The parking space
symbol disappears and the multifunction dis-
play shows the Park Assist cancelled message.
When Active Parking Assist is cancelled, you
must steer again yourself.
Towing
atrailer For vehicles with a trailer tow hitch, the min-
imum required length for parking spaces is
slightly increased. Driving systems
169Driving and parking Z

If you have attached a traile
rto your vehicle,
you should not use Active Parking Assist.
Once the electrical connection is established
between your vehicle and the trailer, Active
Parking Assist is no longer available. Reversing camera
General notes Reversing camera in the tailgate handle
Reversing camera :is an optical parking
and manoeuvring aid. It uses guide lines to
show the area behind your vehicle in the
Audio/COMAND display.
The area behind the vehicle is displayed as a
mirror image, as in the rear-view mirror.
Important safety notes G
WARNING
Make sure that no persons or animals are in
the manoeuvring range. Otherwise, they
could be injured. G
WARNING
The reversing camera is only an aid and may
display obstacles in a distorted or incorrect
manner, or may not even display them at all.
The reversing camera does not relieve you of
the responsibility to pay attention. The cam-
era cannot show objects: R
very near to the rear bumper
R below the rear bumper
R that are located above the tailgate handle
recess
You are always responsible for safety and
must continue to pay attention to your imme-
diate surroundings when parking and
manoeuvring. This applies to the areas
behind, in front of and next to the vehicle. You
could otherwise endanger yourself and oth-
ers. G
WARNING
Under the following circumstances, the
reversing camera will not function, or will
function in a limited manner:
R if the tailgate is open
R in heavy rain, snow or fog
R at night or in very dark places
R if the camera is exposed to very bright light
R if the area is lit by fluorescent light or LED
lighting (the display may flicker)
R if there is a sudden change in temperature,
e.g. when driving into a heated garage in
winter
R if the camera lens is dirty or obstructed
R if the rear of your vehicle is damaged. In this
event, have the camera position and setting
checked at a qualified specialist workshop.
Mercedes-Benz recommends that you use
a Mercedes-Benz Service Centre for this
purpose.
Do not use the reversing camera in these
types of situation. You could otherwise injure
others or damage objects and your vehicle
while you are parking.
Activating/deactivating the reversing
camera X
To activate: make sure that the key is in
position 2in the ignition lock.
X Make sure that in the audio system/
COMAND Online, the "Reversing camera"
function is selected; see the separate oper- 170
Driving systemsDriving and parking

ating instructions for the audio system/
COMAND Online.
X Engage reverse gear.
Guide lines are used to show the area
behind the vehicle in the Audio/COMAND
display. Function mode display for vehicles with COMAND
Online and a trailer tow hitch
X
To switch between function modes on
vehicles with COMAND Online and a
trailer tow hitch: selectthe "Reverse
parking" function with the COMAND con-
troller symbol :; see the separate operat-
ing instructions for COMAND Online.
or
X For the "Coupling up a trailer" function,
select the symbol ;; see the separate
operating instructions for COMAND Online.
The symbol of the selected function is high-
lighted.
To deactivate: the reversing camera is deac-
tivated if you:
R select transmission position P(vehicles
with automatic transmission)
R drive forward ten metres
R for vehicles with an automatic transmis-
sion, shift the transmission from Rto
another position after 15 seconds
R for vehicles with manual transmission, shift
out of reverse gear after 15 seconds
R drive forwards at a speed of over
10 km/h Displays in the Audio/COMAND display G
WARNING
Using the reversing camera can be dangerous
if you are colour-blind or if your ability to dis-
tinguish colours is impaired.
Only use the reversing camera if you can see
and distinguish between all the coloured
guide lines that are displayed by the reversing
camera in the Audio/COMAND display. G
WARNING
Please note that objects not at ground level
may appear to be further away than they
actually are. These include:
R the bumper of a vehicle that is parked
behind your vehicle
R a trailer drawbar
R the ball coupling of a trailer tow hitch
R the tail-end of a lorry
R slanted posts
The lines are only guides, not accurate meas-
urements of the distance to an obstacle.
Therefore, you should never pass the red line
when approaching an obstacle. You could oth-
erwise cause an accident and injure yourself
and others. Lanes
:
White lane marking vehicle width with
steering wheel straight (static)
; Yellow lane marking the course the tyres
will take at the current steering wheel
angle (dynamic) Driving systems
171Driving and parking Z

=
Red lane marking vehicle width at the cur-
ren tsteering wheel angle (dynamic)
? Bumper
For the white and red lanes, the vehicle width
includes the exterior mirrors. For the yellow
lane, the vehicle width is measured to the
outer edge of the wheels. Guide lines
? Bumper
A Red guide line at a distance of approx-
imately 0.25 mfrom the rear of the vehicle
B Yellow guide line at a distance of approx-
imately 4.0 mfrom the rear of the vehicle
C Vehicle centre axle (marker assistance)
D Yellow guide line at a distance of approx-
imately 1.0 mfrom the rear of the vehicle
The lanes and guide lines are only displayed
if you have engaged reverse gear.
The distance specifications only apply to
objects that are at ground level. Additional displays on vehicles with PARKTRONIC
and COMAND Online
:
Front warning display
; Additional PARKTRONIC operational read-
iness indicator
= Rearw arning display
Vehicles with PARKTRONIC and COMAND
Online: if PARKTRONIC is operational
(Y page 163), an additional operational read-
iness indicator will appear in the COMAND
display ;. If the PARKTRONIC warning dis-
plays are active or light up, the warning dis-
plays :and =are also active or light up
correspondingly in the COMAND display.
"Reverse parking" function X
Make sure that the reversing camera is
activated and the "Reverse parking" func-
tio nis selected; see the separate operating
instructions for the audio system/
COMAND Online.
The lane and the guide lines are shown. 172
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