2014 MERCEDES-BENZ CLA-Class key

Useful information
i This Operator's manual describes all
models and all standard and optional equip- ment of your vehicle available at the time of
publication of the Operator's manual.
Country-specific differences are possible.
Please note that your vehicle may not be
equipped with all features described. This
also applies to safety-related systems and
functions.
i Read the information on qualified special-
ist workshops (Y page 26). Overview of climate control systems
Important safety notes
Observe the settings recommended on the
following pages. The windows could other-
wise fog up.
To prevent the windows from fogging 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 defrost windshield function
briefly, if required
The climate control/dual-zone automatic
control regulates the temperature and the
humidity of the vehicle interior and filters out undesirable substances from the air.
Climate control/dual-zone automatic climate control is only operational when the engine is
running. Optimum operation is only achieved
with the side windows and panorama roof
with power tilt/sliding panel closed.
The residual heat function can only be acti-
vated or deactivated with the ignition
switched off (Y page 135).
Always keep the ventilation flaps behind the
side trim panel in the cargo compartment
clear (Y page 117). 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 88). 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 dual-zone automatic
climate control, gaseous pollutants and
odors 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 Mainte-
nance Booklet. As it depends on environ-
mental conditions, e.g. heavy air pollution,
the interval may be shorter than stated in
the Maintenance Booklet.
i It is possible that the residual heat func-
tion may be activated automatically an hour
after the SmartKey has been removed in
order to dry the air-conditioning system.
The vehicle is then ventilated for
30 minutes. 124
Overview of climate control systemsClimate control

R
Only available on vehicles for Canada:
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 Vehicles with COMAND: if you change the
settings of the climate control system, the
climate status display appears for three
seconds at the bottom of the screen in the COMAND display. See also the separate
COMAND operating instructions. You will
see the current settings of the various cli-
mate control functions.
ECO start/stop function During automatic engine switch-off, the cli-
mate control system only operates at a
reduced capacity. If you require the full cli-
mate control output, you can switch off the
ECO start/stop function by pressing the ECO
button (Y page 144). Operating the climate control sys-
tems 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 fog up.
Therefore, switch off climate control only
briefly
Climate control X
Turn the SmartKey to position 2in the igni-
tion lock (Y page 141).
X To switch on: turn control0083clockwise to
the desired position (except position 0)
(Y page 125).
X To switch off: turn control0083counter-
clockwise to position 0(Y page 125). Dual-zone automatic climate control X
Turn the SmartKey to position 2in the igni-
tion lock (Y page 141).
X To activate: press the0058button.
The indicator lamp in the 0058button lights
up. Airflow and air distribution are set to
automatic mode.
or
X Press the 0078button.
The indicator lamp in the 0078button goes
out. The previously selected settings are
restored.
X To deactivate: press the0078button.
The indicator lamp in the 0078button lights
up.
i Dual-zone automatic climate control:
switch on climate control primarily using
the 0058 button. Activating/deactivating cooling with
air dehumidification
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 fog up more quickly. Therefore, only
deactivate the "Cooling with air-dehumidifi-
cation" 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 it is in cooling mode. This is
normal and not a sign that there is a malfunc- tion. Operating the climate control systems
129Climate control

Problems with the "Cooling with air dehumidification" function
Problem
Possible causes/consequences and
0050
0050Solutions The indicator lamp in
the
005A button
flashes three times or
remains off. The "Cool-
ing with air dehumidifi-
cation" function cannot
be switched on. Cooling with air dehumidification has been deactivated due to a
malfunction.
X Visit a qualified specialist workshop. Setting climate control to automatic
General notes The automatic function is only available in
conjunction with dual-zone automatic climate
control.
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 necessary, 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 fog up more quickly. Therefore, only deactivate the "Cooling with air-dehumidifi-
cation" function briefly.
Setting climate control to automatic X
Turn the SmartKey to position 2in the igni-
tion lock (Y page 141).
X Set the desired temperature.
X To activate: press the0058button.
The indicator lamp in the 0058button lights
up. Automatic air distribution and airflow
are activated. X
To switch to manual mode: press the
004F or004A button.
or X Press the 0097or0095 button.
The indicator lamp in the 0058button goes
out. Automatic air distribution and airflow
are deactivated. Setting the temperature
Climate control You can set the temperature for the entire
vehicle.
X Turn the SmartKey to position 2in the igni-
tion lock (Y page 141).
X To increase/reduce: turn control0043
clockwise or counter-clockwise
(Y page 125). Only change the temperature
setting in small increments. Start at 72 ‡
(22 †).
Dual-zone automatic climate control Different temperatures can be set for the
driver's and front-passenger sides.
X Turn the SmartKey to position 2in the igni-
tion lock (Y page 141).
X To increase/reduce: turn control0043or006D
clockwise or counter-clockwise
(Y page 127). Only change the temperature
setting in small increments. Start at 72 ‡
(22 †). Operating the climate control systems
131Climate control

Setting the air distribution
Climate control Air distribution settings
0061
Directs air through the defroster vents
009C Directs air through the center and side
air vents
009B Directs air through the footwell air
vents
i You can also activate several air distribu-
tion settings simultaneously. To do this,
press multiple air distribution buttons. The air is then directed through various vents.
Setting the air distribution X Turn the SmartKey to position 2in the igni-
tion lock (Y page 141).
X Press one or more of the 009C,009B, 0061
buttons.
The corresponding indicator lamp lights up briefly.
Dual-zone automatic climate control Air distribution settings
0061
Directs air through the defroster vents
009C Directs air through the center and side
air vents
009B Directs air through the footwell air
vents
0087 Directs air through the defroster, cen-
ter and side air vents
0086 Directs air through the defroster and
footwell 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 SmartKey to position 2in the igni-
tion lock (Y page 141).
X Press the 004For004A button repeatedly
until the desired symbol appears in the dis- play. Setting the airflow
Climate control X
Turn the SmartKey to position 2in the igni-
tion lock (Y page 141).
X To increase/reduce: turn control0083
clockwise or counter-clockwise
(Y page 125).
Dual-zone automatic climate control X
Turn the SmartKey to position 2in the igni-
tion lock (Y page 141).
X To increase/reduce: press the0097or
0095 button. Switching the ZONE function on/off
This function is only available with dual-zone
automatic climate control.
X To activate: press the00D6button.
The indicator lamp in the 00D6button lights
up.
The temperature setting for the driver's
side is not adopted for the front-passenger
side.
X To deactivate: press the00D6button.
The indicator lamp in the 00D6button goes
out.
The temperature setting for the driver's
side is adopted for the front-passenger
side. 132
Operating the climate control systemsClimate control

Defrosting the windshield
You can use this function to defrost the wind-
shield or to defrost the inside of the wind-
shield and the side windows.
i You should only select the "Windshield
defrosting" function until the windshield is
clear again.
X Turn the SmartKey to position 2in the igni-
tion lock (Y page 141).
X To activate: press the0064button.
The indicator lamp in the 0064button lights
up.
The climate control system switches to the
following functions:
R high airflow
R high temperature
R air distribution to the windshield and
front side windows
R air-recirculation mode off
i The "Windshield defrosting" function
automatically sets the blower output to the optimum defrosting 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 "Windshield defrosting"
function is in operation:
R Climate control: turn airflow control 0083
clockwise or counter-clockwise
(Y page 125).
R Dual-zone automatic climate control:
press the 00F2or00F3 button.
X To deactivate: press the0064button.
The indicator lamp in the 0064button goes
out. The previously selected settings are
restored. Air-recirculation mode remains
deactivated.
or
X Dual-zone automatic climate control: press
the 0058 button.
The indicator lamp in the 0064button goes
out. Airflow and air distribution are set to
automatic mode. or
X Climate control: turn temperature con-
trol 0043clockwise or counter-clockwise
(Y page 125).
Dual-zone automatic climate control: turn
temperature control 0043or006D clockwise or
counter-clockwise (Y page 127). MAX COOL maximum cooling
The MAX COOL function is only available in
vehicles for the USA.
MAX COOL is only operational when the
engine is running. X To activate: press the00C9button.
The indicator lamp in the button lights up.
X To deactivate: press the00C9button
again.
The indicator lamp goes out. The previously selected settings are restored.
When you activate MAX COOL, climate con-
trol switches to the following functions:
R maximum cooling
R maximum airflow
R air-recirculation mode on Defrosting the windows
Windows fogged up on the inside Climate control
X Activate the 005A"Cooling with air dehu-
midification" function.
X If the windows continue to fog up, activate
the 0064 "Windshield defrosting" function.
i You should only select this setting until
the windshield is clear again. Operating the climate cont
rol systems
133Climate control

Dual-zone automatic climate control
X Activate the 005A"Cooling with air dehu-
midification" function.
X Activate automatic mode 0058.
X If the windows continue to fog up, activate
the 0064 "Windshield defrosting" function.
i You should only select this setting until
the windshield is clear again.
Windows fogged up on the outside X
Activate the windshield wipers.
X Set the air distribution to 009Cor009B.
i You should only select this setting until
the windshield is clear again. Rear window defroster
General notes The rear window defroster has a high current
draw. You should therefore switch it off as
soon as the rear window is clear. Otherwise,
the rear window defroster switches off auto-
matically after several minutes.
If the battery voltage is too low, the rear win-
dow defroster may switch off.
Activating/deactivating X
Turn the SmartKey to position 2in the igni-
tion lock (Y page 141).
X Press the 006Cbutton.
The indicator lamp in the 006Cbutton lights
up or goes out. 134
Operating the climate cont
rol systemsClimate control

Problems with the rear window defroster
Problem
Possible causes/consequences and
0050
0050Solutions The rear window
defroster has deactiva-
ted prematurely or can-
not be activated. The battery has not been sufficiently charged.
X Switch off any consumers that are not required, e.g. reading
lamps, interior lighting or the seat heating.
When the battery is sufficiently charged, the rear window
defroster can be activated again. Activating/deactivating air-recircula-
tion mode
General notes You can deactivate the flow of fresh air if
unpleasant odors are entering the vehicle
from outside. The air already inside the vehi-
cle will then be recirculated.
If you switch on air-recirculation mode, the
windows can fog up more quickly, in particu-
lar at low temperatures. Only use air-recircu-
lation mode briefly to prevent the windows
from fogging up.
The operation of air-recirculation mode is the same for all control panels.
Activating/deactivating X
Turn the SmartKey to position 2in the igni-
tion lock (Y page 141).
X To activate: press the008Abutton.
The indicator lamp in the 008Abutton lights
up.
i Air-recirculation mode is activated auto-
matically at high outside temperatures.
When air-recirculation mode is activated
automatically, the indicator lamp in the
008A button is not lit. Outside air is added
after about 30 minutes.
X To deactivate: press the008Abutton.
The indicator lamp in the 008Abutton goes
out. i
Air-recirculation mode deactivates auto-
matically:
R after approximately five minutes at out-
side temperatures below approximately
41 ‡ (5 †)
R after approximately five minutes if the
"Cooling with air dehumidification" func-
tion is deactivated
R after approximately 30 minutes at out-
side temperatures above approximately
41 ‡ (5 †) if the "Cooling with air dehu-
midification" function is activated Activating/deactivating the residual
heat function
General notes The residual heat function is only available in
vehicles for Canada with dual-zone automatic
climate control.
It is possible to make use of the residual heat
of the engine to continue heating the vehicle
for approximately 30 minutes after the engine
has been switched off. The heating time
depends on the set interior temperature.
i The blower will run at a low speed regard-
less of the airflow setting.
i If you activate the residual heat function
at high temperatures, only the ventilation
will be activated. The blower runs at
medium speed. Operating the climate control systems
135Climate control

i
You cannot use the ventilation to cool the
vehicle interior to a temperature lower than the outside temperature.
Activating/deactivating X
Turn the SmartKey to position 0in the igni-
tion lock or remove it (Y page 141).
X To activate: press the004Bbutton.
The indicator lamp in the 004Bbutton lights
up.
X To deactivate: press the004Bbutton.
The indicator lamp in the 004Bbutton goes
out.
i Residual heat is deactivated automati-
cally:
R after approximately 30 minutes
R when the ignition is switched on
R if the battery voltage drops Setting the air vents
Important safety notes
G
WARNING
Very hot or very cold air can flow from the air vents. This could result in burns or frostbite in the immediate vicinity of the air vents. There
is a risk of injury.
Make sure that all vehicle occupants always
maintain a sufficient distance to the air out-
lets. If necessary, redirect the airflow to
another area of the vehicle interior.
In order to ensure the direct flow of fresh air
through the air vents into the vehicle interior,
please observe the following notes:
R keep the air inlet between the windshield
and the hood free of blockages, such as ice, snow or leaves.
R never cover the air vents or air intake grilles
in the vehicle interior.
i You can move the adjusters for the air
vents vertically or horizontally to set the
direction of the airflow. i
For optimal climate control in the vehicle,
open the air vents completely and set the
adjusters to the central position. Setting the center air vents
X
To open the center air vent: turn the
adjuster in one of center air vents 0043coun-
ter-clockwise.
X To close the center air vent: turn the
adjuster in one of center air vents 0043clock-
wise as far as it will go. Setting the side air vents
0043
Side window defroster vent
0044 Side air vent
X To open a side air vent: turn the adjuster
in side air vent 0044counter-clockwise.
X To close a side air vent: turn the adjuster
in side air vent 0044clockwise as far as it will
go. 136
Setting the air ventsClimate control