2014 MERCEDES-BENZ B-CLASS HATCHBACK window

Problems with the seat heating
Problem
Possible causes/consequences and
M
MSolutions The seat heating has
switched off prema-
turely or cannot be
switched on. The on-board voltage is too low because too many electrical con-
sumers are switched on.
X Switch off electrical consumers that you do not need, such as
the rear window heating or interior lighting.
Once the battery is sufficiently charged, the seat heating will
switch back on automatically. Steering wheel
Important safety notes
G
WARNING
You could lose control of the vehicle while
driving if you:
R adjust the driver's seat, steering wheel or
mirrors
R fasten the seat belt
There is a risk of an accident.
Adjust the driver's seat, head restraint, steer-
ing wheel and mirrors and fasten your seat
belt before starting the engine. G
WARNING
Children could become trapped by the steer-
ing wheel if they adjust it. There is a risk of
injury.
When leaving the vehicle, always take the key with you and lock the vehicle. Never leave
children unattended in the vehicle. Adjusting the steering wheel
G
WARNING
The steering wheel may move unexpectedly if you adjust it while driving. This could cause
you to lose control of the vehicle. There is a
risk of an accident.
Make sure that the steering wheel is locked
before driving off. Never unlock the steering
wheel when the vehicle is in motion. :
Release lever
; To adjust the steering wheel height
= To adjust the steering wheel position
(fore-and-aft adjustment)
X Push release lever :down completely.
The steering column is unlocked.
X Adjust the steering wheel to the desired
position.
X Push release lever :up completely.
The steering column is locked.
X Check if the steering column is locked.
When doing so, try to push the steering
wheel up or down or try to move it in the
fore-and-aft direction. 114
Steering wheelSeats, steering wheel and mirrors

Mirrors
Rear-view mirror
X
Anti-dazzle mode: pivot anti-dazzle
switch :forwards or back. Exterior mirrors
Adjusting the exterior mirrors G
WARNING
You could lose control of the vehicle while
driving if you:
R adjust the driver's seat, steering wheel or
mirrors
R fasten the seat belt
There is a risk of an accident.
Adjust the driver's seat, head restraint, steer-
ing wheel and mirrors and fasten your seat
belt before starting the engine. G
WARNING
The exterior mirrors reduce the size of the
image. Objects visible in the mirrors are
closer than they appear. You could misjudge
the distance from road users driving behind
you when changing lanes, for instance. There is a risk of an accident.
You should therefore always look over your
shoulder to determine the actual distance
from road users driving behind you. X
Turn the key to position 1or 2in the ignition
lock (Y page 159).
X Press button :for the left-hand exterior
mirror or button ;for the right-hand exte-
rior mirror.
The indicator lamp in the corresponding
button lights up in red.
The indicator lamp goes out again after
some time. You can adjust the selected
mirror using adjustment button =as long
as the indicator lamp is lit.
X Press adjustment button =up, down, or to
the left or right until you have adjusted the
exterior mirror to the correct position. You
should have a good overview of traffic con- ditions.
The convex exterior mirrors provide a larger
field of vision.
After the engine has been started, the exte-
rior mirrors are automatically heated at low
outside temperatures. Heating takes a maxi-
mum of ten minutes.
i The exterior mirrors can also be heated
manually by switching on the rear window
heating. Mirrors
115Seats, steering wheel and mirrors Z

Switching the rear window wiper on/
off Combination switch
:
è Switch
2 ô Wipes with washer fluid
3 ISwitches on intermittent wiping
4 0Switches off intermittent wiping
5 ô Wipes with washer fluid
X Turn the key to position 1or 2in the ignition
lock (Y page 159).
X Turn switch :on the combination switch
to the corresponding position.
Vehicles with a black and white multi-
function display: when the rear window
wiper is switched on, the èsymbol
appears in the status overview in the instru- ment cluster. Further information on the
status overview (Y page 242).
Vehicles with a colour multifunction
display: when the rear window wiper is
switched on, the èsymbol appears in
the assistance graphic in the instrument
cluster. Further information on the assis-
tance graphic (Y page 243). Replacing the wiper blades
Important safety notes G
WARNING
If the windscreen wipers begin to move while
you are changing the wiper blades, you can be trapped by the wiper arm. There is a risk of
injury. Always switch off the windscreen wipers and
ignition before changing the wiper blades.
! To avoid damaging the windscreen wiper
blades, make sure that you touch only the
wiper arm of the windscreen wiper.
! Never open the bonnet/tailgate if a wiper
arm is folded away from the windscreen/
rear window.
Never fold a windscreen wiper arm without a wiper blade back onto the windscreen/
rear window.
Hold the windscreen wiper arm firmly when
you change the wiper blade. If you release
the wiper arm without a wiper blade and it
falls onto the windscreen/rear window, the windscreen/rear window may be damaged
by the force of the impact.
Mercedes-Benz recommends that you have the wiper blades changed at a qualified
specialist workshop.
Replacing the windscreen wiper blades Removing the wiper blades
X Remove the key from the ignition lock.
X Fold the wiper arm away from the wind-
screen. X
Press both release clips ;.
X Fold wiper blade :in the direction of
arrow =away from wiper arm ?.
X Remove wiper blade :in the direction of
arrow A. 134
Windscreen wipersLights and windscreen wipers

Fitting the wiper blades
X
Position new wiper blade :with recess B
on lug A.
X Fold wiper blade :in the direction of
arrow =onto the wiper arm until retaining
clips ;engage in bracket ?.
X Make sure that wiper blade :is seated
correctly.
X Fold the wiper arm back onto the wind-
screen.
Replacing the rear window wiper blade Removing the wiper blades
X
Remove the key from the ignition lock.
X Fold wiper arm :away from the rear win-
dow until you feel it engage.
X Position wiper blade ;at a right angle to
wiper arm :.
X Hold wiper arm :and press wiper
blade ;in the direction of the arrow until
it releases.
X Remove wiper blade ;. Fitting a wiper blade
X Place new wiper blade ;onto wiper
arm :.
X Hold wiper arm :and press wiper
blade ;in the opposite direction to the
arrow until it engages.
X Make sure that wiper blade ;is seated
correctly.
X Position wiper blade ;parallel to wiper
arm :.
X Fold wiper arm :back onto the rear win-
dow. Windscreen wipers
135Lights and windscreen wipers Z

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). Overview of climate control systems
General notes
Observe the settings recommended on the
following pages. The windows could other-
wise mist up.
To prevent the windows from misting up:
R switch off climate control only briefly
R switch on air-recirculation mode only
briefly
R switch on the cooling with air dehumidifi-
cation function
R switch on the windscreen demisting func-
tion briefly, if required
The air-conditioning system/
THERMOTRONIC automatic climate control
regulates the temperature and the humidity
of the vehicle interior and filters undesirable
substances from the air.
The air-conditioning system/
THERMOTRONIC automatic climate control
can only be operated when the engine is run-
ning. Optimum operation is only achieved
with the side windows and panorama sliding
sunroof closed.
The residual heat function can only be acti-
vated or deactivated with the ignition
switched off (Y page 149).
Always keep the ventilation flaps behind the
side panelling clear (Y page 131). Otherwise
the vehicle will not be ventilated correctly. i
Ventilate the vehicle for a brief period
during warm weather, e.g. using the con-
venience opening feature (Y page 99). This
will speed up the cooling process and the
desired interior temperature will be
reached more quickly.
i The integrated filter filters out most par-
ticles of dust and soot and completely fil-
ters out pollen. With THERMOTRONIC auto- matic climate control, gaseous pollutants
and odours will also be reduced. A clogged
filter reduces the amount of air supplied to
the vehicle interior. For this reason, you
should always observe the interval for
replacing the filter, which is specified in the Service Booklet. As this depends on envi-
ronmental conditions, e.g. heavy air pollu-
tion, the interval may be shorter than statedin the Service Booklet.
i Under certain environmental conditions,
the residual heat function may be activated
automatically an hour after the key has
been removed in order to dry the automatic climate control. The vehicle is then ventila-
ted for 30 minutes. 138
Overview of climate control systemsClimate control

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
Only use air-recirculation mode briefly, e.g.
if there are unpleasant outside odours or
when in a tunnel. The windows could oth-
erwise mist up as no fresh air is drawn into
the vehicle in air-recirculation mode.
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). 140
Overview of climate control systemsClimate control

Control panel for THERMOTRONIC automatic climate control (2-zone)
:
To set the temperature, left (Y page 144)
; To set climate control to automatic mode (Y page 144)
= To demist the windscreen (Y page 146)
? To increase the airflow (Y page 145)
A To set the air distribution (Y page 145)
B Display
C To activate/deactivate air-recirculation mode (Y page 148)
D To switch climate control on/off (Y page 142)
E To set the temperature, right (Y page 144)
F To activate/deactivate the residual heat function (Y page 149)
G To activate/deactivate cooling with air dehumidification (Y page 142)
H To reduce the airflow (Y page 145)
I To switch the rear window heating on/off (Y page 147)
J To switch the ZONE function on/off (Y page 145)Information on using THERMOTRONIC
automatic climate control
Automatic climate control The following contains instructions and rec-
ommendations to enable you to get the most
out of your THERMOTRONIC automatic cli-
mate control.
R Activate climate control using the Ãand
¿ buttons. The indicator lamps in the
à and¿ buttons light up.
R Set the temperature to 22 †. R
Only use the "Windscreen demisting" func-
tion briefly until the windscreen is clear
again.
R Only use air-recirculation mode briefly, e.g.
if there are unpleasant outside odours or
when in a tunnel. The windows could oth-
erwise mist up as no fresh air is drawn into the vehicle in air-recirculation mode.
R Use the ZONE function to adopt the tem-
perature settings on the driver's side for
the front-passenger side as well. The indi-
cator lamp in the ábutton goes out. Overview of climate control systems
141Climate control