2014 MERCEDES-BENZ B-CLASS HATCHBACK service

TION ASSIST still detects increasing lapses in
concentration, you will be warned again after
15 minutes at the earliest. This will only hap-
pen if ATTENTION ASSIST still detects typical indicators of fatigue or increasing lapses in
concentration.
If a warning is output in the multifunction dis-
play, a service station search is performed in
COMAND Online. You can select a service
station and navigation to this service station
will then begin. This function can be activated
and deactivated in COMAND Online. Traffic Sign Assist
General notes Traffic Sign Assist displays the maximum
speed permitted and overtaking restrictions
to the driver in the instrument cluster. Driving onto a section of road in the wrong direction
triggers a warning. Traffic Sign Assist detects
traffic signs with camera system :attached
behind the top of the windscreen. The data
and general traffic regulations stored in the
navigation system are also used to determine the current speed limit.
If a traffic sign that is relevant to your vehicleis passed, the display of the speed limits and
overtaking restrictions is updated. The display can also be updated without a
visible traffic sign if:
R the vehicle changes roads (e.g. motorway
exit or slip road)
R a village or town boundary is passed which
is stored in the digital map
R the last traffic sign detected by the camera
has not been repeated
If a sign indicating the end of a restriction
(speed limit or overtaking restriction) is
passed, the sign is displayed for five seconds.
Vehicles with colour multifunction dis-
play: the currently applicable traffic regula-
tion continues to be shown in the assistance
graphic display (Y page 243).
The camera also detects traffic signs with a
restriction indicated by an additional sign
(e.g. in wet conditions).
The traffic signs are only displayed with the
restrictions if:
R the regulation must be observed with the
restriction, or
R Traffic Sign Assist is unable to determine
whether the restriction applies
If Traffic Sign Assist is unable to determine a
maximum permitted speed from any of the
available sources, no speed limit is displayed
in the instrument cluster either. Traffic Sign Assist is not available in all coun-
tries. In vehicles with a colour multifunction
display, display :is shown in the multifunc-
tion display. 218
Driving systemsDriving and parking

You will see one of the following display mes-
sages in the multifunction display:
R Telephone ready
Telephone ready or the name of the net-
work provider: the mobile phone has found a network and is ready to receive.
R Telephone No service
Telephone No service: there is no net-
work available or the mobile phone is
searching for a network.
i You can obtain further information about
suitable mobile phones and connecting
mobile phones via Bluetooth ®
:
R from any Mercedes-Benz Service Centre
R on the Internet at http://
www.mercedes-benz.com/connect
Accepting a call X
Press the 6button on the steering
wheel to accept an incoming call.
If someone calls you when you are in the Tel Tel
menu, a display message appears in the mul- tifunction display.
You can accept a call at any time, even if you
are not in the Tel Telmenu.
Rejecting or ending a call X
Press the ~button on the steering
wheel.
You can end or reject a call even if you are not
in the Tel
Telmenu. Dialling an entry from the phone book X
Press the =or; button on the steer-
ing wheel to select the Tel Telmenu.
X Press the 9,:ora button to
switch to the phone book.
X Authorise access to the phone book on the
phone.
X Press the 9or: button to select the
desired name.
or
X To begin rapid scrolling: press and hold
the 9 or: button for longer than
one second.
Rapid scrolling stops when you release the
button or reach the end of the list.
X If only one telephone number is stored
for a name: press the6ora button
to start dialling.
or
X If there is more than one number for a
particular name: press the6ora
button to display the numbers.
X Press the 9or: button to select the
number you want to dial.
X Press the 6ora button to start dial-
ling.
or
X If you do not want to make the call: press
the ~ or% button.
Redialling The on-board computer saves the last names
or numbers dialled in the redial memory.
X Press the =or; button on the steer-
ing wheel to select the Tel Telmenu.
X Press the 6button to switch to the
redial memory.
X Press the 9or: button to select the
desired name or number. Menus and submenus
241On-board computer and displays Z

the multifunction display in the assistance
graphic shows the ésymbol.
For further information about ATTENTION
ASSIST, see (Y page 216).
Activating/deactivating Blind Spot
Assist X
Press the =or; button on the steer-
ing wheel to select the Assist.
Assist. menu.
X Press the 9or: button to select
Blind Spot Assist
Blind Spot Assist .
X Press the abutton.
The current selection is displayed.
X To activate/deactivate: press thea
button again.
For further information about Blind Spot
Assist, see (Y page 221).
Activating/deactivating Lane Keeping
Assist X
Press the =or; button on the steer-
ing wheel to select the Assist. Assist.menu.
X Press the 9or: button to select
Lane Keeping Assist
Lane Keeping Assist .
X Press the abutton.
The current selection is displayed.
X Press ato confirm.
X Press the :or9 button to set Off
Off ,
Standard
Standard orAdaptive
Adaptive.
X Press the abutton to save the setting.
Vehicles with a black and white multifunc-
tion display: when Lane Keeping Assist is
activated, the multifunction display in the
status overview shows the Ãsymbol.
Vehicles with a colour multifunction dis-
play: when Lane Keeping Assist is activa-
ted, the multifunction display shows the
lane markings as bright lines in the assis-
tance graphic.
For further information about Lane Keeping
Assist, see (Y page 223). Service menu
Depending on the equipment fitted in the
vehicle, you have the following options in the
Serv.
Serv. menu:
R Calling up display messages in the mes-
sage memory (Y page 251)
R Restarting the tyre pressure loss warning
system (Y page 358)
R Checking the tyre pressure electronically
(Y page 358)
R Calling up the service due date
(Y page 323) Settings menu
Introduction Depending on the equipment fitted in the
vehicle, In the
Settings Settingsmenu you have the
following options:
R Changing the instrument cluster settings
R Changing the vehicle settings
R Changing the heating settings
R Changing the convenience settings
R Restoring the factory settings Menus and submenus
245On-board computer and displays Z

Instrument cluster
Unit of measurement for distance
The
Display unit Speed-/odometer:
Display unit Speed-/odometer:
function allows you to choose whether cer-
tain displays appear in kilometres or miles in
the multifunction display.
X Press the =or; button on the steer-
ing wheel to select the Settings Settingsmenu.
X Press the :or9 button to select the
Instrument cluster
Instrument cluster submenu.
X Press ato confirm.
X Press the :or9 button to select the
Display unit Speed-/odometer
Display unit Speed-/odometer func-
tion.
You will see the selected setting: km
km or
miles
miles.
X Press the abutton to save the setting.
The selected unit of measurement for dis-
tance applies to:
R digital speedometer in the Trip Tripmenu
R total distance recorder and the trip meter
R trip computer
R current fuel consumption and approximate
range
R navigation instructions in the Navi
Navi menu
R Cruise control
R SPEEDTRONIC
R DISTRONIC PLUS
R ASSYST PLUS service interval display
Switching the additional speedometer
on/off
United Kingdom: this function is unavailable.
The Dig.
Dig. speedo speedo [km/h]
[km/h]orDig.
Dig. speedo
speedo
[mph]
[mph] function allows you to choose whether
the multifunction display in the status area
shows the speed in km/h
km/h or inmph mphinstead of
the outside temperature.
X Press the =or; button on the steer-
ing wheel to select the Settings
Settingsmenu.
X Press the :or9 button to select the
Instrument cluster
Instrument cluster submenu.
X Press ato confirm. X
Press the :or9 button to select the
Dig. speedo [mph]:
Dig. speedo [mph]: orDig. speedo
Dig. speedo
[km/h]:
[km/h]: function.
You will see the selected setting: on
onoroff
off .
X Press the abutton to save the setting.
Selecting the permanent display function
United Kingdom: this function is unavailable.
You can determine whether the multifunction
display permanently shows the outside tem-
perature or the speed in mph.
X Press the =or; button on the steer-
ing wheel to select the Settings Settingsmenu.
X Press the :or9 button to select the
Instrument cluster
Instrument cluster submenu.
X Press ato confirm.
X Press the :or9 button to select the
Permanent display:
Permanent display: function.
You will see the selected setting: outside
outside
temperature
temperature orDig. speedo [mph]
Dig. speedo [mph].
X Press the abutton to save the setting.
Lights Switching the daytime driving lights
on/off
The
Daytime driving lights
Daytime driving lights function can
only be switched on with the engine turned
off.
X Press the =or; button on the steer-
ing wheel to select the Settings Settingsmenu.
X Press the :or9 button to select the
Lights
Lights submenu.
X Press ato confirm.
X Press the :or9 button to select the
Daytime driving lights
Daytime driving lights function.
Vehicles with black and white multifunction
display: you will see the selected setting: on
on
or off
off .
Vehicles with colour multifunction display:
if the Daytime driving lights Daytime driving lights function
has been switched on, the cone of light and the W symbol in the multifunction dis-
play are shown in orange.
X Press the abutton to save the setting. 246
Menus and submenusOn-board computer and displays

Display messages
Introduction
General notes Display messages appear in the multifunction display.
Display messages with graphic symbols are simplified in the Owner's Manual and may differ
from the symbols in the multifunction display.
Please respond in accordance with the display messages and follow the additional notes in this Owner's Manual.
Certain display messages are accompanied by an audible warning tone or a continuous tone.
When the ignition is switched off, all display messages are deleted apart from some high-
priority display messages. Once the causes of the high-priority display messages have been
rectified, these display messages are deleted as well.
When you stop and park the vehicle, please observe the notes on:
R HOLD function (Y page 201)
R Parking (Y page 181)
Hides display messages X
Press the aor% button on the steering wheel to hide the display message.
The display message is hidden.
The multifunction display shows high-priority display messages in red. Some high-priority dis-
play messages cannot be hidden.
The multifunction display shows these messages continuously until the causes for the mes-
sages have been remedied.
Message memory The on-board computer saves certain display messages in the
message memory. You can call
up the display messages:
X Press the =or; button on the steering wheel to select the Service
Service menu.
If there are display messages, the multifunction display shows 2 messages
2 messages, for example.
X Press the 9or: button to select the entry, e.g. 2 messages
2 messages.
X Press ato confirm.
X Press the 9or: button to scroll through the display messages. Display
messages
251On-board computer and displays Z

Mobile phone
Important safety notes G
WARNING
Operating mobile communications equip-
ment while driving distracts you from paying
attention to traffic conditions. This could also cause you to lose control of the vehicle. There
is a risk of an accident.
Use this device only when the vehicle is sta-
tionary.
You must observe the legal requirements for
the country in which you are currently driving when operating mobile communications
equipment in the vehicle.
If it is permitted by law to operate communi-
cations equipment while the vehicle is in
motion, you may only do so if the traffic sit-
uation permits. You may otherwise be dis-
tracted from the traffic conditions, cause an
accident and injure yourself and others.
Excessive levels of electromagnetic radiation
may cause damage to your health and to the
health of others. The use of an exterior aerial
takes into consideration the scientific discus- sion surrounding the possible health risk
posed by electromagnetic fields.
Mercedes-Benz recommends the use of an
approved exterior aerial. This ensures:
R optimal mobile phone reception quality in
the vehicle
R that mutual interference between the vehi-
cle electronics and mobile phones is mini-
mised
An exterior aerial has the following advan-
tages:
R it conducts the electromagnetic fields gen-
erated by a wireless device to the exterior
R the field strength in the vehicle interior is
lower than in a vehicle that does not have
an exterior aerial
Information on retrofitting two-way radios
and mobile phones (RF transmitters)
(Y page 384). General notes There are various mobile phone brackets that
may be fitted in your vehicle; in some cases,
these are country-specific.
More information on suitable mobile phones, mobile phone brackets and on connecting
Bluetooth ®
-capable mobile phones to
COMAND Online/Audio 20 can be obtained:
R at your Mercedes-Benz Service Centre
R on the Internet at http://www.mercedes-
benz.com/connect
The functions and services available when
you use the phone depend on your mobile
phone model and service provider.
Using a mobile phone To connect a mobile phone to the exterior
aerial and charge it, insert it into the mobile
phone bracket.
X Open the telephone compartment
(Y page 300).
X Place the mobile phone bracket into the
pre-installed fitting; see the separate instal-
lation instructions for the mobile phone fit-
ting.
X Insert the mobile phone into the mobile
phone bracket; see the separate installa-
tion instructions for the mobile phone fit-
ting.
i The mobile phone can also be operated
without being in the bracket. However, the charging function and aerial function are
not available.
In order to use Bluetooth ®
(SAP profile) on
your telephone module, you must first insert
the telephone module into the pre-installed
fitting. This connects it to the exterior aerial.
If you wish to charge the mobile phone, then
you must connect it to a USB port.
Further information on the telephone module
with Bluetooth ®
(SAP profile) can be found in
the Digital Owner's Manual. 314
FeaturesStowing and features

X
Slowly slide oil dipstick :into the guide
tube to the stop, and take it out again.
If the level is between MIN mark =and
MAX mark ;, the oil level is correct.
X If the oil level has dropped to MIN mark =
or below, top up with 1.0 l of engine oil.
Adding engine oil G
WARNING
Certain components in the engine compart-
ment could be very hot, e.g. the engine, the
radiator and parts of the exhaust system.
There is a risk of injury when accessing the
engine compartment.
As far as possible, allow the engine to cool
down and only touch the components descri- bed in the following. G
WARNING
If engine oil comes into contact with hot com- ponents in the engine compartment, it may
ignite. There is a risk of fire and injury.
Make sure that engine oil does not spill out
over the filler neck. Allow the engine to cool
down and thoroughly clean the components
that have come into contact with engine oil
before you start the engine. H
Environmental note
When topping up the oil, take care not to spill
any. If oil enters the soil or waterways, it is
harmful to the environment.
! Only use engine oils and oil filters that
have been approved for vehicles with a ser-
vice system. You can obtain a list of the
engine oils and oil filters tested and
approved in accordance with the
Mercedes-Benz Specifications for Service
Products at any Mercedes-Benz Service
Centre. Damage to the engine or exhaust system is
caused by the following:
R using engine oils and oil filters that have
not been specifically approved for the
service system
R changing the engine oil and oil filter after
missing the change interval required by
the service system
R using engine oil additives
! Do not add too much oil. Topping up with
too much engine oil can result in damage to
the engine or to the catalytic converter.
Have excess engine oil siphoned off. Example: engine oil filler cap
X Turn cap :anti-clockwise and remove it.
X Top up the engine oil.
If the oil level is at or below the MIN mark on
the oil dipstick, top up with 1.0 lof engine
oil.
X Replace cap :on the filler neck and turn
clockwise.
Make sure that the cap locks securely into place.
X Check the oil level again with the oil dip-
stick (Y page 320).
For further information on engine oil, see
(Y page 390). Engine compartment
321Maintenance and care Z

Checking and adding other service
products
Checking the coolant level G
WARNING
The engine cooling system is under pressure, particularly if the engine is warm. You could
be scalded by hot coolant spraying out when
opening the cap. There is a danger of injury.
Allow the engine to cool before opening the
cap. Wear gloves and protective eyewear
when opening. Slowly turn the cap half a turn
to allow pressure to escape.
! The coolant level must only be checked
and corrected when the engine has cooled
down (coolant temperature under 40 †).
Checking the coolant level when the cool-
ant temperature is over 40 † can lead to
damage to the engine or engine cooling
system. Example
X Park the vehicle on a level surface.
Only check the coolant level if the vehicle is
on a level surface and the engine has
cooled down.
X Turn the key to position 2in the ignition
lock (Y page 159).
X Check the coolant temperature display in
the instrument cluster.
The coolant temperature must be below
40 †.
X Turn the key to position 0in the ignition
lock (Y page 159). X
Slowly turn cap :half a turn anti-clock-
wise to allow excess pressure to escape.
X Turn cap :further anti-clockwise and
remove it.
If the coolant is at the level of marker bar =
in the filler neck when cold, there is enough coolant in coolant expansion tank ;.
X If necessary, top up with coolant that has
been tested and approved by Mercedes-
Benz.
X Replace cap :and turn it clockwise as far
as it will go.
Further information on coolant (Y page 392).
Windscreen washer system G
WARNING
Certain components in the engine compart-
ment could be very hot, e.g. the engine, the
radiator and parts of the exhaust system.
There is a risk of injury when accessing the
engine compartment.
As far as possible, allow the engine to cool
down and only touch the components descri- bed in the following. G
WARNING
If windscreen washer concentrate comes into contact with hot components of the engine or
the exhaust system, it can ignite. There is a
risk of fire and injury.
Make sure the windscreen washer concen-
trate does not come into contact with the filler neck. 322
Engine compartmentMaintenance and care