light MERCEDES-BENZ CLA-Class 2017 C117 Repair Manual

Canada only
:
Sets the temperature, left (Ypage 115)
;Sets climate control to automatic (Ypage 115)
=Defrosts the windshield (Ypage 116)
?Increases the airflow (Ypage 116)
ASets the air distribution (Ypage 115)
BDisplay
CSwitches air-recirculation mode on/off (Ypage 118)
DActivates/deactivates climate control (Ypage 114)
ESets the temperature, right (Ypage 115)
FSwitches the residual heat on or off (Ypage 118)
GSwitches cooling with air dehumidification on/off (Ypage 114)
HReduces the airflow (Ypage 116)
ISwitches the rear window defroster on/off (Ypage 117)
JSwitches the ZONE function on/off (Ypage 116)
Optimum use of 3-zone automatic cli-
mate control
Climate control system
The following contains instructions and recom-
mendations to enable you to get the most out of
your dual-zone automatic climate control.
RActivate climate control using the Ãand
¿ buttons. The indicator lamps in the
à and¿ buttons light up.
RSet the temperature to 72 ‡ (22 †).
ROnlyuse th e"Windshield defrosting "function
briefl yuntil th ewindshield is clear again .
ROnly use air-recirculation mod ebriefly, e.g. if
there are unpleasant outside odors or when in
a tunnel. The windows could otherwise fog up, since no fresh air is draw
ninto th evehicl ein
air-recirculation mode.
RUse th eZON Efunction to adop tth etemper-
ature setting son th edriver's side for th e
front-passenger side as well. The indicato r
lamp in th eá buttongoe sout .
RUse th eresidual heat function if you wan tto
heat or ventilat eth evehicl einterio rwhen th e
ignition is switched off .The residual heat
function can only be activated or deactivated
wit hth eignition switched off .
RIf you changeth esetting sof th eclimat econ-
trol system, th eclimat estatu sdisplay
appears for approximately three seconds at
th ebotto mof th escree nin th emultimedia
system display; see separat eoperating
Overview of climate control systems11 3
Climate control

instructions. You will see the current settings
of the various climate control functions.
DYNAMIC SELECT button (except
Mercedes-AMG vehicles)
You can choose between various drive programs
with the DYNAMIC SELECT button
(
Ypage 127).
If you have selected drive program E:
Rwhen heating, the electrical heater booster is
deactivated and in the warming-up phase
heat output is reduced
Rthe rear window defroster running time is
reduced
Depending on the configuration, climate set-
tings may also be influenced in the drive pro-
gram I.
If you have selected drive program Cor S, cli-
mate settings are not influenced.
ECO start/stop function
During automatic engine switch-off, the climate
control system only operates at a reduced capa-
city. If you require the full climate control output,
you can switch off the ECO start/stop function
by pressing the ECO button (
Ypage 126).
Operating the climate control sys-
tems
Activating/deactivating climate con-
trol
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
Air-conditioning system
XTurn the SmartKey to position 2in the ignition
lock (Ypage 121).
XTo switch on: turn controlAclockwise to
the desired position (except position 0)
(
Ypage 110).
XTo switch off: turn controlAcounter-clock-
wise to position 0(Ypage 110).
Dual-zone automatic climate control
XTurn the SmartKey to position 2in the ignition
lock (Ypage 121).
XTo activate: press theÃbutton.
The indicator lamp in the Ãbutton lights
up. Airflow and air distribution are set to auto-
matic mode.
or
XPress the ^button.
The indicator lamp in the ^button goes
out. The previously selected settings are
restored.
XTo deactivate: press the^button.
The indicator lamp in the ^button lights
up.
iDual-zone automatic climate control: switch
on climate control primarily using the Ã
button.
Switching cooling with air dehumidi-
fication on/off
General notes
If you deactivate the "Cooling with air-dehumid-
ification" function, the air inside the vehicle will
not be cooled. The air inside the vehicle will also
not be dehumidified. The windows can fog up
more quickly. Therefore, only deactivate the
"Cooling with air-dehumidification" function
briefly.
The "Cooling with air dehumidification" function is only available when the engine is running. 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.
Activating/deactivating
XPress the ¿button.
The indicator lamp in the ¿button lights
up or goes out.
The indicator lamp in the button indicates that
the respective function is activated. The
"Cooling with air dehumidification" function
has a delayed switch-off feature.
114Operating the climate control systems
Climate control

Problems with the "Cooling with air dehumidification" function
ProblemPossible causes/consequences andMSolutions
The indicator lamp in the
¿button flashes
three times or remains
off. The "Cooling with air
dehumidification" func-
tion cannot be switched
on.Cooling with air dehumidification has been deactivated due to a mal-
function.
XVisit a qualified specialist workshop.
Setting climate control to automatic
General notes
The automatic climate control function is only
available in conjunction with dual-zone auto-
matic climate control.
In automatic mode, the set temperature is main-
tained automatically at a constant level. The
system automatically regulates the temperature
of the dispensed air, the airflow and the air dis-
tribution.
The "Cooling with air dehumidification" function
is activated automatically in automatic mode.
Setting climate control to automatic
XTurn the SmartKey to position 2in the ignition
lock (Ypage 121).
XSet the desired temperature.
XTo activate: press theÃbutton.
The indicator lamp in the Ãbutton lights
up. Automatic air distribution and airflow are
activated.
XTo switch to manual mode: press theÉ
or Ë button.
or
XPress 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 vehi- cle. The set temperature is automatically main-
tained at a constant level.
XTurn the SmartKey to position 2in the ignition
lock (Ypage 121).
XTo increase or reduce: turn control:coun-
ter-clockwise or clockwise (Ypage 110). Only
change the temperature setting in small
increments. Start at 72 ‡ (22 †).
Dual-zone automatic climate control
Different temperatures can be set for the driv-
er's and front-passenger sides. The set temper-
ature is automatically maintained at a constant
level.
XTurn the SmartKey to position 2in the ignition
lock (Ypage 121).
XTo increase or decrease: turn control:or
E counter-clockwise or clockwise
(
Ypage 112). Only change the temperature
setting in small increments. Start at 72 ‡
(22 †).
Setting the air distribution
Air-conditioning system
Air distribution settings
¯ Directs air through the defroster vents
P Directs air through the center and side air
vents
O Directs air through the footwell air vents
Operating the climate control systems115
Climate control

iYou can also activate several air distribution
settings simultaneously. To do this, press
multiple air distribution buttons. The air is
then directed through various vents.
iRegardless 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
XTurn the SmartKey to position 2in the ignition
lock (Ypage 121).
XPress one or more of the P,O,¯
buttons.
The corresponding indicator lamp lights up
briefly.
Dual-zone automatic climate control
Air distribution settings
¯ Directs air through the defroster vents
P Directs air through the center and side air
vents
O Directs air through the footwell air vents
S Directs air through the center, side and
footwell vents
b Directs air through the defroster, center
and side air vents
a Directs air through the defroster and
footwell vents
_ Directs air through the defroster, center,
side and footwell vents
iRegardless 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
XTurn the SmartKey to position 2in the ignition
lock (Ypage 121).
XPress the ÉorË button repeatedly
until the desired symbol appears in the dis-
play.
Setting the airflow
Air-conditioning system
XTurn the SmartKey to position 2in the ignition
lock (Ypage 121).
XTo increase or reduce: turn controlAcoun-
ter-clockwise or clockwise (Ypage 110).
Dual-zone automatic climate control
XTurn the SmartKey to position 2in the ignition
lock (Ypage 121).
XTo increase or reduce: press theKor
I button.
Switching the ZONE function on/off
This function is only available with dual-zone
automatic climate control.
XTo 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.
XTo 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.
Defrosting the windshield
General notes
You can use this function to defrost the wind-
shield or to clear a fogged up windshield and
side windows.
iYou should only select the "Windshield
defrosting" function until the windshield is
clear again.
Switching the "Windshield defrosting"
function on or off
XTurn the SmartKey to position 2in the ignition
lock (Ypage 121).
XTo activate: press the¬button.
The indicator lamp in the ¬button lights
up.
116Operating the climate control systems
Climate control

The climate control system switches to the
following functions:
Rhigh airflow
Rhigh temperature
Rair distribution to the windshield and front
side windows
Rair-recirculation mode off
iThe "Windshield defrosting" function auto-
matically sets the blower output to the opti-
mum defrosting effect. As a result, the airflow
may increase or decrease automatically after
the ¬ button is pressed.
iYou can adjust the blower output manually
while the "Windshield defrosting" function is
in operation:
RAir-conditioning system: turn airflow con-
trol Acounter-clockwise or clockwise
(
Ypage 110).
RDual-zone automatic climate control: press
the ó orô button.
XTo deactivate: press the¬button.
The indicator lamp in the ¬button goes
out. The previously selected settings are
restored. Air-recirculation mode remains
deactivated.
or
XDual-zone automatic climate control: press
the à button.
The indicator lamp in the ¬button goes
out. Airflow and air distribution are set to
automatic mode.
or
XAir-conditioning system: turn temperature
control :counter-clockwise or clockwise
(
Ypage 110).
Dual-zone automatic climate control: turn
temperature control :orE counter-clock-
wise or clockwise (
Ypage 112).
MAX COOL maximum cooling
The MAX COOL function is only available in vehi-
cles for the USA.
MAX COOL is only operational when the engine
is running.
XTo activate: press theÙbutton.
The indicator lamp in the button lights up.
XTo deactivate: press theÙbutton.
The indicator lamp goes out. The previously
selected settings are restored.
When you activate MAX COOL, climate control
switches to the following functions:
Rmaximum cooling
Rmaximum airflow
Rair-recirculation mode on
Defrosting the windows
Windows fogged up on the inside
Air-conditioning system
XActivate the ¿"Cooling with air dehumid-
ification" function.
XIf the windows continue to fog up, activate the
¬ "Windshield defrosting" function.
iYou should only select this setting until the
windshield is clear again.
Dual-zone automatic climate control
XActivate the ¿"Cooling with air dehumid-
ification" function.
XActivate automatic mode Ã.
XIf the windows continue to fog up, activate the
¬ "Windshield defrosting" function.
iYou should only select this setting until the
windshield is clear again.
Windows fogged up on the outside
XActivate the windshield wipers.
XSet the air distribution to PorO.
iYou 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 automatically
after several minutes.
Operating the climate control systems117
Climate control

If the battery voltage is too low, the rear window
defroster may switch off.Activating/deactivating
XTurn the SmartKey to position2in the ignition
lock (Ypage 121).
XPress the ¤button.
The indicator lamp in the ¤button lights
up or goes out.
Problems with the rear window defroster
ProblemPossible causes/consequences and MSolutions
The rear window
defroster has deactiva-
ted prematurely or can-
not be activated.The battery has not been sufficiently charged.
XSwitch 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.
Switching air-recirculation mode
on/off
General notes
You can deactivate the flow of fresh air if
unpleasant odors are entering the vehicle from
outside. The air already inside the vehicle will
then be recirculated.
If you switch on air-recirculation mode, the win-
dows can fog up more quickly, in particular at
low temperatures. Only use air-recirculation
mode briefly to prevent the windows from fog-
ging up.
The operation of air-recirculation mode is the
same for all control panels.
Activating/deactivating
XTurn the SmartKey to position 2in the ignition
lock (Ypage 121).
XTo activate: press theebutton.
The indicator lamp in the ebutton lights
up.
Air-recirculation mode switches on automati-
cally:
Rat high outside temperatures
Rat high levels of pollution
When air-recirculation mode is activated auto-
matically, the indicator lamp in the ebutton
is not lit. Outside air is added after about
30 minutes.
XTo deactivate: press theebutton.
The indicator lamp in the ebutton goes
out.
iAir-recirculation mode deactivates auto-
matically:
Rafter approximately five minutes at outside
temperatures below approximately 45 ‡
(7 †)
Rafter approximately five minutes if the
"Cooling with air dehumidification" func-
tion is deactivated
Rafter approximately 30 minutes at outside
temperatures above approximately 45 ‡
(7 †) if the cooling with air dehumidifica-
tion function is activated
Switching the residual heat on or off
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.
iThe blower will run at a low speed regardless
of the airflow setting.
118Operating the climate control systems
Climate control

iIf you activate the residual heat function at
high temperatures, only the ventilation will be
activated. The blower runs at medium speed.
iYou cannot use the ventilation to cool the
vehicle interior to a temperature lower than
the outside temperature.
Activating/deactivating
XTurn the SmartKey to position 0in the ignition
lock or remove it (Ypage 121).
XPress the Ìbutton.
The indicator lamp in the Ìbutton lights
up or goes out.
The indicator lamp in the button indicates that
the respective function is activated.
iResidual heat is deactivated automatically:
Rafter approximately 30 minutes
Rwhen the ignition is switched on
Rif the battery voltage drops
Air vents
Important safety notes
GWARNING
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:
Rkeep the air inlet between the windshield and
the hood free of blockages, such as ice, snow or leaves.
Rnever cover the air vents or air intake grilles in
the vehicle interior.
iFor optimal climate control in the vehicle,
open the air vents completely and set the
adjusters to the central position.
Setting the air vents
:Side window defroster vent
;Side air vent
XTo open a side air vent: turn the adjuster in
side air vent ;to the left.
XTo close a side air vent: turn the adjuster in
side air vent ;clockwise as far as it will go.
iThe center and rear air vents are adjusted in
the same way.
Air vents119
Climate control
Z

operates independently of the ECO start/stop
automatic engine switch-off function.
Key positions with the Start/Stop button
:Start/Stop button
;Ignition lock
As soon as the ignition is switched on, all the
indicator lamps in the instrument cluster light
up.
For further information on situations in which an indicator lamp either fails to go out after the
engine is started or lights up while driving,
please refer to "Warning and indicator lamps in
the instrument cluster" (
Ypage 217).
If Start/Stop button :has not yet been
pressed, this corresponds to the SmartKey
being removed from the ignition.
XTo switch on the power supply: press
Start/Stop button :once.
The power supply is switched on. You can now
activate the windshield wipers, for example.
The power supply is switched off again if:
Rthe driver's door is opened and
Ryou press Start/Stop button :twice when in
this position
XTo switch on the ignition: press Start/Stop
button :twice.
The ignition is switched on.
If you press Start/Stop button :once when
in this position, the ignition is switched off
again.
Removing the Start/Stop button
You can remove the Start/Stop button from the
ignition lock and start the vehicle as normal
using the SmartKey.
You can only switch between Start/Stop button
mode and SmartKey operation when the vehicle is stationary. You must also engage park position
P.
XRemove Start/Stop button:from ignition
lock ;.
You do not have to remove the Start/Stop but-
ton from the ignition lock when you leave the
vehicle. You should, however, always take the
SmartKey with you when leaving the vehicle. As
long as the SmartKey is in the vehicle:
Rthe vehicle can be started using the Start/
Stop button
Rthe electrically powered equipment can be
operated
Starting the engine
Important safety notes
GWARNING
If children are left unsupervised in the vehicle,
they could:
Ropen the doors, thus endangering other
people or road users.
Rget out and disrupt traffic.
Roperate the vehicle's equipment.
Additionally, children could set the vehicle in
motion if, for example, they:
Rrelease the parking brake.
Rshifting the automatic transmission out of
park position P
RStart the engine.
There is a risk of an accident and injury.
When leaving the vehicle, always take the
SmartKey with you and lock the vehicle. Never
leave children or animals unattended in the
vehicle. Always keep the SmartKey out of
reach of children.
GWARNING
Combustion engines emit poisonous exhaust
gases such as carbon monoxide. Inhaling
these exhaust gases leads to poisoning. There
is a risk of fatal injury. Therefore never leave
the engine running in enclosed spaces with-
out sufficient ventilation.
122Driving
Driving and parking

Deactivating or activating theECO
start/stop function
XTo deactivate :press EC Obutto n:.
Indicator lamp ;goe sout .
XTo activate :press EC Obutto n:.
Indicator lamp ;lights up.
If indicator lamp ;is off, th eEC Ostart/sto p
function has bee ndeactivated manually or as
th eresult of amalfunction .The engin ewill then
no tbe switched of fautomatically when th evehi-
cl e stops .
AMG Performance exhaust syste m
(Mercedes-AMG vehicles )
You can choosebetween differen tAM GPer -
formanc eexhaus tsystem volume susin gth e
position of th eexhaus tflap .
Each time you start th eengin ewit hth eSmart -
Key or th eStart/Sto pbutton, th equietest set -
ting is activated.
Settin gth evolume :
XPress butto n:.
If you selec tth eloudest setting ,indicator
lamp ;lights up.
Problem swit hth eengin e
ProblemPossible causes/consequences an dMSolutions
The engin edoe sno t
start .The HOLD function or Distanc ePilo tDISTRONIC is activated.
XDeactivat eth eHOLD function (Ypage 156) or Distanc ePilo t
DISTRONIC (Ypage 154).
XTryto start th eengin eagain .
The engin edoe sno t
start .The starter moto r
can be heard.RThere is amalfunction in th eengin eelectronics.
RThere is amalfunction in th efue lsupply.
Before attemptin gto start th eengin eagain :
XTurnth eSmartKey bac kto position 0in th eignition lock.
or
XPress th eStart/Sto pbutto nrepeatedly until all indicator lamp sin
th einstrumen tcluster go out .
XTryto start th eengin eagain (Ypage 122). Avoid excessivel ylon g
and frequent attempt sto start th eengin eas these will drain th e
battery.
If th eengin edoe sno tstart after severa lattempts:
XConsult aqualified specialis tworkshop .
126Driving
Driving and parking

ProblemPossible causes/consequences andMSolutions
The engine does not
start. You cannot hear
the starter motor.The on-board voltage is too low because the battery is too weak or
discharged.
XJump-start the vehicle (Ypage 273).
If the engine does not start despite attempts to jump-start it:
XConsult a qualified specialist workshop.
The starter motor was exposed to a thermal load that was too high.
XAllow the starter motor to cool down for approximately two minutes.
XTry to start the engine again.
If the engine still does not start:
XConsult a qualified specialist workshop.
The engine is not running
smoothly and is misfir-
ing.There is a malfunction in the engine electronics or in a mechanical
component of the engine management system.
XOnly depress the accelerator pedal slightly.
Otherwise, non-combusted fuel may get into the catalytic converter
and damage it.
XHave the cause rectified immediately at a qualified specialist work-
shop.
The coolant temperature
gauge shows a value
above 248 ‡ (120 †).
The coolant warning
lamp may also be on and
a warning tone may
sound.The coolant level is too low. The coolant is too hot and the engine is no
longer being cooled sufficiently.
XStop as soon as possible and allow the engine and the coolant to
cool down.
XCheck the coolant level (Ypage 257). Observe the warning notes
as you do so and add coolant if necessary.
DYNAMIC SELECT button (all vehicles
except Mercedes-AMG vehicles)
Use the DYNAMIC SELECT button to change the
drive program. Depending on the drive program
selected the following vehicle characteristics
will change:
Rthe drive (engine and transmission manage-
ment)
Rthe suspension (vehicles with damping sys-
tem or AMG adaptive sport suspension sys-
tem)
Rthe steering.
Rthe availability of the ECO start/stop function
Rthe climate control
Each time you start the engine with the Smart-
Key or the Start/Stop button, drive program Cis
activated. For further information about starting
the engine, see (
Ypage 122).
XPress DYNAMIC SELECT button :as many
times as necessary until the desired drive
program is selected.
The selected drive program appears in the
multifunction display. After five seconds the
display goes out and the status icon of the
selected drive program appears.
DYNAMIC SELECT button (all vehicles except Mercedes-AMG vehicles)127
Driving and parking
Z