2014 MERCEDES-BENZ B-CLASS HATCHBACK set clock

vehicle. You can deactivate the double lock
function by deactivating the interior motion
sensor (Y page 82). The doors can then be
opened from the inside after the vehicle has
been locked from the outside. You can open
the rear doors from inside the vehicle if they
are not secured by the child-proof locks
(Y page 72). The anti-theft alarm system is
triggered if the door is opened from the
inside. Switch off the alarm (Y page 80).
The anti-theft alarm system is triggered if the door is opened from the inside. Switch off the alarm (Y page 80).
When a locked door is opened from inside the vehicle, the previous unlocking process will
be observed if the vehicle has been:
R locked with the locking button for the cen-
tral locking or
R locked automatically
The vehicle will be fully unlocked if it had pre- viously been fully unlocked. Only the door
which has been opened from the inside is
unlocked if only the driver's door had been
previously unlocked. Automatic locking feature
X
To deactivate: press and hold button :
for about five seconds until a tone sounds.
X To activate: press and hold button ;for
about five seconds until a tone sounds.
i If you press one of the two buttons and do
not hear a tone, the relevant setting has
already been selected. The vehicle is locked automatically when the
ignition is switched on and the wheels are
turning.
You could therefore be locked out if:
R the vehicle is being pushed.
R the vehicle is being towed.
R the vehicle is being tested on a dynamom-
eter.
You can also activate and deactivate the auto- matic locking function using the on-board
computer (Y page 247). Unlocking the driver's door (emer-
gency key element)
If the vehicle can no longer be locked or
unlocked with the key or KEYLESS-GO, use
the emergency key element.
If you use the emergency key element to
unlock and open the driver's door, the anti-
theft alarm system will be triggered
(Y page 80).
X Take the emergency key element out of the
key (Y page 89).
X Insert the emergency key element into the
lock of the driver's door as far as it will go. X
Turn the emergency key element anti-
clockwise as far as it will go to position 1.
The door is unlocked.
i On right-hand-drive vehicles, turn the
emergency key element clockwise. Doors
95Opening and closing Z

Control panel for air-conditioning system
:
To set the temperature (Y page 144)
; To demist the windscreen (Y page 146)
= To set the air distribution (Y page 145)
? To activate/deactivate air-recirculation mode (Y page 148)
A To set the airflow (Y page 145)
B To activate/deactivate cooling with air dehumidification (Y page 142)
C To switch the rear window heating on/off (Y page 147)Notes on using the air-conditioning
system
Air-conditioning system Below, you can find a number of tips and rec-
ommendations for optimum use of the air-
conditioning system.
R Switch on the air-conditioning system by
turning control knob Aclockwise to the
desired position (except position 0).
R Set the temperature to 22 †.
R Recommendation for avoiding misted
windows at low exterior temperatures
or in rain: switch on the ¿cooling with
dehumidification function (Y page 142).
Set air distribution to ¯and if possible
switch off PandO (Ypage 145).
Deactivate air-recirculation mode e
(Y page 148). Set airflow control
Ato a setting between
3 and 6(Y page 145).
R Recommendation for rapid cooling or
heating of the vehicle interior: briefly set
airflow control Ato a setting between 3
and 6(Y page 145).
R Recommendation for a constant vehi-
cle interior temperature: set airflow con-
trol Ato a setting between 1and 3
(Y page 145).
R Recommendation for air distribution in
winter: select the Oand¯ settings
(Y page 145).
Recommendation for air distribution in
summer: select the PorP and
¯ settings (Y page 145).
R Only use the "Windscreen demisting" func-
tion briefly until the windscreen is clear
again. Overview of climate control systems
139Climate control

R
Use the residual heat function if you want to
heat or ventilate the vehicle interior when
the ignition is switched off. The residual
heat function can only be activated or deac- tivated with the ignition switched off.
R If you change the settings of the climate
control system, the climate status display
appears for approximately three seconds
at the bottom of the screen in the Audio/
COMAND display (see separate operating
instructions). You will see the current set-
tings of the various climate control func-
tions.
ECO start/stop function During automatic engine switch-off, the cli-
mate control only operates at a reduced capa-
city. If you require the full climate control out-
put, you can switch off the ECO start/stop
function by pressing the ECO button
(Y page 166). Operating the climate control system
Switching climate control on/off
General notes When the climate control is switched off, the
air supply and air circulation are also
switched off. The windows could mist up.
Therefore, only switch off climate control
briefly.
Air-conditioning system X
Turn the key to position 2in the ignition
lock (Y page 159).
X To switch on: turn controlAclockwise to
the desired position (except position 0)
(Y page 139).
X To switch off: turn controlAanti-clock-
wise to position 0(Y page 139). THERMOTRONIC automatic climate
control X
Turn the key to position 2in the ignition
lock (Y page 159).
X To activate: press theÃbutton.
The indicator lamp in the Ãbutton lights
up. Airflow and air distribution are set to
automatic mode.
or X Press the ^button.
The indicator lamp in the ^button goes
out. The previous settings are reactivated.
X To deactivate: press the^button.
The indicator lamp in the ^button lights
up.
i THERMOTRONIC automatic climate con-
trol: switch on climate control primarily
using the Ãbutton. Activating/deactivating the cooling
with air dehumidification function
General notes If you deactivate the "Cooling with air dehu-
midification" function, the air inside the vehi-
cle will not be cooled. The air inside the vehi- cle will also not be dehumidified. The win-
dows can mist up more quickly. Therefore,
only deactivate the "Cooling with air dehu-
midification" function briefly.
The "Cooling with air dehumidification" func-
tion is only available when the engine is run-
ning. The air inside the vehicle is cooled and
dehumidified according to the temperature
selected.
Condensation may drip from the underside of the vehicle when cooling mode is active. Thisis normal and not a sign that there is a mal-
function. 142
Operating the climate control systemClimate control

Problems with the "Cooling with air dehumidification" function
Problem
Possible causes/consequences and
M
MSolutions The indicator lamp in
the
¿ button
flashes three times or
remains off. The cool-
ing with air dehumidifi-
cation function cannot
be activated. The cooling with air dehumidification function has been deactiva-
ted due to a malfunction.
X Visit a qualified specialist workshop. Setting climate control to automatic
mode
General notes Only THERMOTRONIC automatic climate con-
trol features the "Control climate control
automatically" function.
In automatic mode, the set temperature is
maintained automatically at a constant level.
The system automatically regulates the tem-
perature of the dispensed air, the airflow and
the air distribution.
The automatic mode functions optimally
when the "Cooling with air dehumidification"
function is activated. If desired, cooling with
air dehumidification can be deactivated.
If you deactivate the "Cooling with air-dehu-
midification" function, the air inside the vehi- cle will not be cooled. The air inside the vehi-cle will also not be dehumidified. The win-
dows can mist up more quickly. Therefore,
only deactivate the "Cooling with air-dehu-
midification" function briefly.
Setting climate control to automatic
mode X
Turn the key to position 2in the ignition
lock (Y page 159).
X Set the desired temperature.
X To activate: press theÃbutton.
The indicator lamp in the Ãbutton lights
up. Automatic air distribution and airflow
are activated. X
To switch to manual mode: press the
É orË button.
or
X Press the KorI button.
The indicator lamp in the Ãbutton goes
out. Automatic air distribution and airflow
are deactivated. Setting the temperature
Air-conditioning system You can set the temperature for the entire
vehicle. The set temperature is automatically
maintained at a constant level.
X Turn the key to position 2in the ignition
lock (Y page 159).
X To increase/reduce: turn control:anti-
clockwise or clockwise (Y page 139). Only
change the temperature setting in small
increments. Start at 22 †.
THERMOTRONIC automatic climate
control Different temperatures can be set for the
driver's and front-passenger sides. The set
temperature is automatically maintained at a
constant level.
X Turn the key to position 2in the ignition
lock (Y page 159).
X To increase/reduce: turn control:orE
anti-clockwise or clockwise (Y page 141).144
Operating the climate control systemClimate control

Only change the temperature setting in
small increments. Start at 22 †.
Setting the air distribution
Air-conditioning system Air distribution settings
¯
Directs the airflow through the demis-
ter vents
P Directs the airflow through the centre
and side air vents
O Directs the airflow through the foot-
well air vents
i You can also activate several of the air
distribution settings simultaneously. In
order to do this, press several of the air
distribution buttons. The air is then routed
through different air vents.
i Regardless of the air distribution setting,
airflow is always directed through the side
air vents. The side air vents can only be
closed if the adjusters are turned clockwise until they engage.
Setting the air distribution X Turn the key to position 2in the ignition
lock (Y page 159).
X Press one or more of the P,O,¯
buttons.
The corresponding indicator lamp comes
on.
THERMOTRONIC automatic climate
control Air distribution settings
¯
Directs the airflow through the demis-
ter vents
P Directs the airflow through the centre
and side air vents
O Directs the airflow through the foot-
well air vents S
Directs the airflow through the centre
and side air vents as well as the foot-
well air vents
b Directs the airflow through the centre
and side air vents as well as the demis-
ter vents
a Directs the airflow through the foot-
well and demister vents
_ Directs the airflow through the demis-
ter vents, the centre and side air vents
as well as the footwell air vents
i Regardless of the air distribution setting,
airflow is always directed through the side
air vents. The side air vents can only be
closed if the adjusters are turned clockwise until they engage.
Setting the air distribution
X Turn the key to position 2in the ignition
lock (Y page 159).
X Press the ÉorË button repeatedly
until the desired symbol appears in the dis- play. Setting the airflow
Air-conditioning system X
Turn the key to position 2in the ignition
lock (Y page 159).
X To increase/reduce: turn controlAanti-
clockwise or clockwise (Y page 139).
THERMOTRONIC automatic climate
control X
Turn the key to position 2in the ignition
lock (Y page 159).
X To increase/reduce: press theKor
I button. Switching the ZONE function on/off
This function is only available with
THERMOTRONIC automatic climate control. Operating the climate control system
145Climate control

X
To activate: press theábutton.
The indicator lamp in the ábutton lights
up.
The temperature setting for the driver's
side is not adopted for the front-passenger side.
X To deactivate: press theábutton.
The indicator lamp in the ábutton goes
out.
The temperature setting for the driver's
side is adopted for the front-passenger
side. Demisting the windscreen
General notes You can use this function to defrost the wind-
screen or to demist the inside of the wind-
screen and the side windows.
i You should only select the "Windscreen
demisting" function until the windscreen is clear again.
Switching the "Windscreen demisting"
function on/off X
Turn the key to position 2in the ignition
lock (Y page 159).
X To activate: press the¬button.
The indicator lamp in the ¬button lights
up.
The climate control system switches to the
following functions:
R high airflow
R high temperature
R air distribution to the windscreen and
front side windows
R air-recirculation mode off
i The "Windscreen demisting" function
automatically sets the blower output to the optimum demisting effect. As a result, the
airflow may increase or decrease automat-
ically after the ¬button is pressed. i
You can adjust the blower output man-
ually while the "Windscreen demisting"
function is in operation:
R Air-conditioning system: turn airflow
control Aanti-clockwise or clockwise
(Y page 139).
R THERMOTRONIC automatic climate con-
trol: press the óorô button.
X To deactivate: press the¬button.
The indicator lamp in the ¬button goes
out. The previous settings are reactivated.
Air-recirculation mode remains deactiva-
ted.
or
X THERMOTRONIC automatic climate con-
trol: press the Ãbutton.
The indicator lamp in the ¬button goes
out. Airflow and air distribution are set to
automatic mode.
or
X Air-conditioning system: turn temperature
control :anti-clockwise or clockwise
(Y page 139).
THERMOTRONIC automatic climate con-
trol: turn temperature control :orE anti-
clockwise or clockwise (Y page 141). Demisting the windows
Windows misted up on the inside Air-conditioning system
X Activate the ¿"Cooling with air dehu-
midification" function.
X If the windows continue to mist up, activate
the ¬ "Windscreen demisting" function.
i You should only select this setting until
the windscreen is clear again. 146
Operating the climate control systemClimate control

i
Optimal climate control function is ach-
ieved by opening the air vents fully and set- ting the adjusters to the middle position. Adjusting the centre air vents
X
To open the centre air vent: turn the
adjuster in one of centre air vents :to the
left.
X To close the centre air vent: turn the
adjuster in one of centre air vents :clock-
wise as far as it will go. Adjusting the side air vents
:
Side window demister vent
; Side air vent
X To open a side air vent: turn the adjuster
in side air vent ;to the left.
X To close a side air vent: turn the adjuster
in side air vent ;clockwise as far as it will
go. Setting the rear-compartment air
vents
:
Rear-compartment air vent, left
; Rear-compartment air vent, right
= Rear-compartment air vent thumbwheel
X To open/close: turn thumbwheel =up or
down.
i If the control panel in the front is switched
off, no air can flow through the rear air
vents. 156
Air ventsClimate control

Useful information
i This Owner's Manual describes all mod-
els, series and optional equipment for your
vehicle that were available at the time of
going to press. National variations are pos- sible. Note that your vehicle may not be
equipped with all of the functions descri-
bed. This is also the case for systems and
functions relevant to safety.
i Read the information on qualified special-
ist workshops: (Y page 24). Important safety notes
G
WARNING
Operating the integrated information systems and communications equipment in the vehicle
while driving will distract you from traffic con-
ditions. You could then lose control of the
vehicle. There is a risk of an accident.
Only operate these devices if road traffic con-
ditions permit. If you are unsure about the
surrounding conditions, pull over to a safe
location and make entries only while the vehi-
cle is stationary.
You must observe the legal requirements for
the country in which you are currently driving when operating the on-board computer. G
WARNING
If the instrument cluster has failed or mal-
functioned, you may not recognise function
restrictions relevant to safety. The operating
safety of your vehicle may be impaired. There is a risk of an accident.
Drive on carefully. Have the vehicle checked
at a qualified specialist workshop immedi-
ately.
The on-board computer only shows messages
or warnings from certain systems in the mul- tifunction display. You should therefore make
sure your vehicle is operating safely at all
times. If the operating safety of your vehicle is
impaired, park the vehicle safely as soon as
possible. Contact a qualified specialist work-
shop.
For an overview, see the instrument panel
illustration (Y
page 30). Displays and operation
Instrument cluster lighting
The light sensor in the instrument cluster
automatically controls the brightness of the
multifunction display. In daylight, the displays
in the instrument cluster are not illuminated.
The lighting in the instrument cluster, in the
displays and the controls in the vehicle inte-
rior can be adjusted using the brightness con-
trol knob.
The brightness control knob is located on the bottom left of the instrument cluster
(Y page 30).
X Turn the brightness control knob clockwise
or anti-clockwise.
If the light switch is set to Ã,Tor
L, the brightness is dependent upon
the brightness of the ambient light. Coolant temperature gauge
G
WARNING
If you open the bonnet while the engine is
overheating or while there is a fire in the
engine compartment, you could come into
contact with hot gases or other leaking ser-
vice products. There is a danger of injury.
Allow an overheating engine to cool down
before opening the bonnet. If there is a fire in the engine compartment, leave the bonnet
closed and notify the fire brigade.
The coolant temperature gauge is in the
instrument cluster on the right-hand side
(Y page 30). 232
Displays and operationOn-board computer and displays