Position key MERCEDES-BENZ CLA-Class 2017 C117 Owner's Guide

take precedence over the daytime running
lamps.
USA only:
The daytime running lamps improve the visibility
of your vehicle during the day. To do this, the
daytime running lamps function must be
switched on using the on-board computer
(
Ypage 184).
If the engine is running and you turn the light
switch to the TorL position, the manual
settings take precedence over the daytime run-
ning lamps.
Low-beam headlamps
Even if the light sensor does not detect that it is
dark, the parking lamps and low-beam head-
lamps come on when the ignition is switched on and the light switch is set to the Lposition.
This is a particularly useful function in the event
of rain and fog.
XTo switch on the low-beam headlamps:
turn the SmartKey in the ignition lock to posi- tion 2or start the engine.
XTurn the light switch to L.
The green Lindicator lamp in the instru-
ment cluster lights up.
Rear fog lamp
The rear fog lamp improves visibility of your
vehicle for the traffic behind in the event of thick
fog. Please take note of the country-specific
regulations for the use of rear fog lamps.
XTo switch on the rear fog lamp: turn the
SmartKey in the ignition lock to posi tion2or
start the engine.
XTurn the light switch to LorÃ.
XPress the Rbutton.
The yellow Rindicator lamp in the instru-
ment cluster lights up.
XTo switch off the rear fog lamp: press the
R button.
The yellow Rindicator lamp in the instru-
ment cluster goes out.
iWhen the rear fog lamp is switched on, the
center brake lamp in the tail lamp switches off
due to a legal requirement.
Parking lamps
!If the battery charge is very low, the parking
lamps or standing lamps are automatically
switched off to enable the next engine start. Always park your vehicle safely and in a well lit
area, in accordance with the relevant legal
stipulations. Avoid using the
Tparking
lamps over a period of several hours. If pos-
sible, switch on the right-hand Xor left-
hand W standing lamps.
XTo switch on: turn the light switch to T.
The green Tindicator lamp in the instru-
ment cluster lights up.
Standing lamps
Switching on the standing lamps ensures the
corresponding side of the vehicle is illuminated.
XTo switch on the standing lamps: the
SmartKey should not be in the ignition lock or
it should be in position 0.
XTurn the light switch to W( left-hand side of
the vehicle) or X(right-hand side of the
vehicle).
Combination switch
XTo indicate briefly: press the combination
switch briefly to the pressure point in the
direction of arrow ;or?.
The corresponding turn signal flashes three
times.
XTo indicate: press the combination switch
beyond the pressure point in the direction of
arrow ;or?.
XTo switch on the high-beam headlamps:
turn the light switch to LorÃ.
XPress the combination switch beyond the
pressure point in the direction of arrow :.
The high-beam headlamps only switch on in
the à position if the low-beam headlamps
are on.
100Exterior lighting
Lights and windshield wiper s

Interior lighting control
General notes
In order to preven tth evehicle's battery from
discharging ,th einterio rlighting function sare
automatically deactivated after som etime
except when th eSmartKey is in position 2in th e
ignition lock.
The color and brightness for th eambien tlighting
may be set via th emultimedia system; see th e
separat eoperating instructions.
Automatic interior lighting control
XTo switch on: set theswitch to center posi-
tion B.
XTo switch off :set th eswitch to th e|
position .
The interio rlighting automatically switches on if
you:
Runlock th evehicl e
Ropenadoor
Rremove th eSmartKey from th eignition loc k
The interio rligh tis activated for ashort while
when th eSmartKey is remove dfrom th eignition
lock. This delaye dswitch-off can be adjusted via
th emultimedia system; see th eseparat eoper -
ating instructions.
Replacing bulbs
Important safety notes
GWARNIN G
Bulbs, lamp sand connectors can get ver yhot
when operating .If you chang e abulb, you
could burn yourself on these components.
Ther eis aris kof injury.
Allow these component sto cool down before
changing abulb.
Do no tuse abulb if it has been dropped or if it s
glass tub ehas been scratched.
The bulb may explod eif
Ryou touch it
Rit is hot
Ryou dro pit
Ryou scratch it . Use bulbs only in closed lamp
sthat hav ebeen
designed for this purpose .Only instal lspar e
bulbs of th esam etyp eand th especifie dvolt-
age.
Mark son th eglass tub ereduce th eservic elife
of th ebulbs .Do no ttouch th eglass tub ewit h
your bare hands. If necessary, clean th eglass
tub ewhen cold wit halcohol or spirit and rub it
off wit h alint-free cloth .
Protect bulbs from moisture during operation .
Do no tallow bulbs to come int ocontact wit h
liquids.
Replac eonly th ebulbs listed (
Ypage 103).
Hav eth ebulbs that you canno tchang eyourself
replace dat aqualified specialist workshop.
If you require assistanc ereplacing bulbs ,con-
sult aqualified specialist workshop.
If th ene wbulb still does no tligh tup, consult a
qualified specialist workshop.
Headlamps and lights are an important aspect of
vehicl esafety. You must therefor emak esur e
tha
t these function correctl yat all times .Hav e
th eheadlamp setting checke dregularly.
Vehicles with LED headlamps: theligh tclus -
ters of your vehicl eare equipped wit hLE Dligh t
bulbs .Do no treplace th ebulbs yourself .Con -
tac t a qualified specialist workshop whic hhas
th enecessar yspecialist knowledge and tools to
carry out th ewor krequired.
Overview of bulb types
You can replace th efollowin gbulbs .The bulb
typ ecan be foun din th elegend .
Replacing bulbs103
Lights and windshield wipers
Z

Replacing the wiper blades
Important safety notes
GWARNING
If the windshield wipers begin to move while
you are changing the wiper blades, you could be trapped by the wiper arm. There is a risk of
injury.
Always switch off the windshield wipers and
ignition before changing the wiper blades.
!To avoid damaging the wiper blades, make
sure that you touch only the wiper arm of the
wiper.
!Never open the hood if a windshield wiper
arm has been folded away from the wind-
shield.
Never fold a windshield wiper arm without a
wiper blade back onto the windshield.
Hold the windshield wiper arm firmly when
you change the wiper blade. If you release the
windshield wiper arm without a wiper blade
and it falls onto the windshield, the windshield
may be damaged by the force of the impact.
Mercedes-Benz recommends that you have
the wiper blades changed at a qualified spe-
cialist workshop.
Changing the windshield wiper blades
Removing the wiper blades
XVehicles without KEYLESS-GO or KEY-
LESS-GO start function: remove the Smart-
Key from the ignition lock.
XVehicles with KEYLESS-GO or KEYLESS-
GO start function: switch off the engine.
XFold the wiper arm away from the windshield.
XHold on to the wiper arm with one hand. With
the other hand, turn wiper blade in direction
of arrow:away from the wiper arm as far as
it will go.
XSlide catch ;in the direction of arrow =
until it engages in the removal position with a
noticeable click.
XRemove the wiper blade in the direction of
arrow ?away from the wiper arm.
Installing the wiper blades
XInsert the new wiper blade into the wiper arm
in the direction of arrow :.
Windshield wipers107
Lights and windshield wipers
Z

XSlide catch;in the direction of arrow =
until it engages in the locking position with a
noticeable click.
XMake sure that the wiper blade is seated cor-
rectly.
XFold the wiper arm back onto the windshield.
XRemove protective film :of the service indi-
cator on the tip of the wiper blade.
If the color of the service indicator changes from
black to yellow, the wiper blades should be
replaced.
iThe duration of the color change varies
depending on the usage conditions.
Problems with the windshield wipers
ProblemPossible causes/consequences and MSolutions
The windshield wipers
are jammed.Leaves or snow, for example, may be obstructing the windshield wiper
movement. The wiper motor has been deactivated.
XFor safety reasons, you should remove the SmartKey from the igni-
tion lock.
XRemove the cause of the obstruction.
XSwitch the windshield wipers back on.
The windshield wipers
fail completely.The windshield wiper drive is malfunctioning.
XSelect another wiper speed on the combination switch.
XHave the windshield wipers checked at a qualified specialist work-
shop.
The windshield washer
fluid from the spray noz-
zles no longer hits the
center of the windshield.The spray nozzles are misaligned.
XHave the spray nozzles adjusted at a qualified specialist workshop.
108Windshield wipers
Lights and windshield wipers

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

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

!Do not warm up the engine with the vehicle
stationary. Drive off immediately. Avoid high
engine speeds and driving at full throttle until
the engine has reached its operating temper- ature.
Only shift the automatic transmission to the
desired drive position when the vehicle is sta-
tionary.
Where possible, avoid spinning the drive
wheels when pulling away on slippery roads.
You could otherwise damage the drive train.
!Mercedes-AMG vehicles: avoid full-load
operation and engine speeds greater than
5000 rpm when the engine is cold. This helps
to protect the engine and avoids uncomfort-
able driving.
SmartKey positions
SmartKey
gTo remove the SmartKey
(shift the transmission to position P)
1Power supply for some consumers, such as
the windshield wipers
2Ignition (power supply for all consumers)
and drive position
3To start the engine
iThe SmartKey can be turned in the ignition
lock even if it is not the correct SmartKey for
the vehicle. The ignition is not switched on.
The engine cannot be started.
Start/Stop button
General notes
Vehicles with KEYLESS-GO are equipped with
SmartKeys featuring the integrated KEYLESS-
GO function and a detachable Start/Stop but-
ton.
A check which periodically establishes a radio
connection between the vehicle and the Smart-
Key determines whether a valid SmartKey is in
the vehicle. This occurs, for example, when
starting the engine.
When you insert the Start/Stop button into the
ignition lock, the system needs approximately
two seconds recognition time. You can then use
the Start/Stop button.
Pressing the Start/Stop button several times in
succession corresponds to the different Smart-
Key positions in the ignition lock. This is only the
case if you are not depressing the brake pedal.
If you depress the brake pedal and press the
Start/Stop button, the engine starts immedi-
ately.
To start the vehicle without actively using the
SmartKey:
Rthe Start/Stop button must be inserted in the
ignition lock.
Rthe SmartKey must be in the vehicle.
Rthe vehicle must not be locked with the
SmartKey or KEYLESS-GO (Ypage 70)
Do not keep the KEYLESS-GO key:
Rwith electronic devices, e.g. a mobile phone
or another SmartKey.
Rwith metallic objects, e.g. coins or metal foil.
Rinside metallic objects, e.g. a metal case
This can affect the functionality of KEYLESS-GO.
If you lock the vehicle with the SmartKey remote
control or with KEYLESS-GO, after a short time:
Ryou will not be able to switch on the ignition
with the Start/Stop button.
Ryou will no longer be able to start the engine
with the Start/Stop button until the vehicle is
unlocked again
If you lock the vehicle centrally using the button
on the front door (
Ypage 75), you can continue
to start the engine with the Start/Stop button.
The engine can be switched off while the vehicle
is in motion by pressing and holding the Start/
Stop button for three seconds. This function
Driving121
Driving and parking
Z