2017 MERCEDES-BENZ CLA-Class Light

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

In addition, the current drive program settings
are displayed briefly in the multimedia systemdisplay.
iIn a few countries, the ECO start/stop func-
tion is deactivated at the factory due to the
available fuel grade. In this case, the ECO
start/stop function is not available in any
drive program, regardless of the display in the
multimedia system display.
Available drive programs:
C ComfortComfortable and economi-
cal driving characteristics
SSportSporty driving characteris-
tics
IIndividualIndividual settings
E EconomyParticularly economical
driving characteristics
Additional information for drive programs
(Ypage 133).
You can also change gear yourself using the
steering wheel paddle shifters. For further infor- mation on the manual drive program
(
Ypage 135).
DYNAMIC SELECT controller
(Mercedes-AMG vehicles)
Use the DYNAMIC SELECT controller to change
the drive program. Depending on the drive pro-
gram selected the following vehicle character-
istics will change:
Rthe drive
Rthe transmission management
RESP®
Rthe suspension (vehicles with AMG adaptive
sport suspension system)
Rthe availability of the ECO start/stop function
Rthe availability of gliding mode
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).
XTurn DYNAMIC SELECT controller :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.
The drive program indicator on DYNAMIC
SELECT controller :lights up in red.
Available drive programs:
I IndividualIndividual settings
C ComfortComfort-oriented, opti-
mum-economy engine and
transmission settings
SSportSporty engine and trans-
mission settings
S+ Sport PlusParticularly sporty trans-
mission settings
RaceMaximum sportiness and
engine and transmission
settings suitable for the
racetrack
Additional information for drive programs
(Ypage 133).
You can also change gear yourself using the
steering wheel paddle shifters. For further infor- mation on the manual drive program
(
Ypage 135).
128DYNAMIC SELECT controller (Mercedes-AMG vehicles)
Driving and parking

XTurn the fuel filler cap counterclockwise and
remove it.
XInsert the fuel filler cap into the holder on theinside of fuel filler flap ;.
XCompletely insert the filler neck of the fuel
pump nozzle into the tank, hook in place and
refuel.
XOnly fill the tank until the pump nozzle
switches off.
Do not add any more fuel after the pump stops
filling for the first time. Otherwise, fuel may leak
out.
Closing the fuel filler flap
XReplace the cap on the filler neck and turn
clockwise until it engages audibly.
XClose the fuel filler flap. Close the fuel filler flap before locking the vehi-
cle.
If you are driving with the fuel filler cap open, the
8
reserve fuel warning lamp flashes. A mes-
sage appears in the multifunction display
(
Ypage 204).
In addition, the ;Check Engine warning
lamp may light up (
Ypage 222).
For further information on warning and indicator
lamps in the instrument cluster, see
(
Ypage 222).
Problems with fuel and the fuel tank
ProblemPossible causes/consequences and MSolutions
Fuel is leaking from the
vehicle.The fuel line or the fuel tank is faulty.
GWARNING
Risk of explosion or fire.
XApply the electric parking brake.
XSwitch off the engine.
XRemove the SmartKey from the ignition lock.
or, in vehicles with KEYLESS-GO start-function or KEYLESS ‑GO
XOpen the driver's door.
The vehicle electronics now have status0. This is the same as the
SmartKey having been removed.
XDo not restart the engine under any circumstances.
XConsult a qualified specialist workshop.
The fuel filler flap cannot
be opened.The fuel filler flap is not unlocked.
XUnlock the vehicle (Ypage 69).
The SmartKey battery is discharged or nearly discharged.
XUnlock the vehicle using the mechanical key (Ypage 71).
The fuel filler flap is unlocked, but the opening mechanism is jammed.
XConsult a qualified specialist workshop.
Refueling139
Driving and parking
Z