light MERCEDES-BENZ GLK-CLASS SUV 2015 Repair Manual

Switching the rear window wiper on/
off
Combination switch :
è Switch
2ô Wipes with washer fluid
3I Switches on intermittent wiping
40 Switches off intermittent wiping
5ô Wipes with washer fluid
X Turn the SmartKey to position 1 or 2 in the
ignition lock ( Y page 149).
X Turn switch : on the combination switch
to the corresponding position.
When the rear window wiper is switched on,
the icon appears in the instrument cluster.
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.
! Never open the hood/tailgate if a wiper
arm has been folded away from the wind-
shield/rear window.
Never fold a windshield wiper arm without a
wiper blade back onto the windshield/rear window. Hold the windshield wiper arm firmly when
you change the wiper blade. If you release
the wiper arm without a wiper blade and it
falls onto the windshield/rear window, the
windshield/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.
! To avoid damaging the wiper blades,
make sure that you touch only the wiper
arm of the wiper.
Changing the windshield wiper blades
Removing the wiper blades
X Remove the SmartKey from the ignition
lock or turn it to position 0 (KEYLESS-GO)
( Y page 149).
X Fold the wiper arm away from the wind-
shield until it engages.
XFirmly press release knob : and pull the
wiper blade upwards from the wiper arm in the direction of the arrow.
Installing the wiper blades
X Position the new wiper blade in the retainer
on the wiper arm and slide it into place in
the opposite direction to the arrow.
The wiper blade audibly engages.
X Make sure that the wiper blade is seated
correctly.
X Fold the wiper arm back onto the wind-
shield.
Windshield wipers127
Lights and windshield wipers
Z

Replacing the rear window wiper blade
Removing a wiper blade
XRemove the SmartKey from the ignition
lock.
X Fold wiper arm : away from the rear win-
dow until it engages.
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 ;.
Installing 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.
128Windshield wipers
Lights and windshield wipers

Problems with the windshield wipers
ProblemPossible causes/consequences and M Solutions
The windshield wipers
are jammed.Leaves or snow, for example, may be obstructing the windshield
wiper movement. The wiper motor has been deactivated. X
For safety reasons, you should remove the SmartKey from the
ignition lock.
or X Switch off the engine using the Start/Stop button and o pen the
driver's door.
X Remove the cause of the obstruction.
X Switch the windshield wipers back on.
The windshield wipers
fail completely.The windshield wiper drive is malfunctioning.
X Select another wiper speed on the combination switch.
X Have the windshield wipers checked at a qualified specialist
workshop.
The windshield washer
fluid from the spray
nozzles no longer hits
the center of the wind-
shield.The spray nozzles are misaligned.
X Have the spray nozzles adjusted at a qualified specialist work-
shop.
Windshield wipers129
Lights and windshield wipers
Z

USA only :
Sets the temperature, left (Y page 140)
;Defrosts the windshield ( Y page 141)
=Switches maximum cooling on/off ( Y page 142)
?Switches cooling with air dehumidification on/off ( Y page 137)
ASwitches the rear window defroster on/off ( Y page 142)
BSets the temperature, right ( Y page 140)
CActivates/deactivates air-recirculation mode ( Y page 143)
DSets the air distribution ( Y page 140)
EIncreases the airflow ( Y page 141)
FReduces the airflow ( Y page 141)
GSwitches climate control on/off ( Y page 137)
HSets climate control to automatic ( Y page 139)
Optimum use of dual-zone climate
control
Climate control system
The following contains notes and recommen-
dations on optimum use of dual-zone climate control.
R Activate climate control using the à and
¿ buttons. The indicator lamps in the
à and ¿ buttons light up.
R Set the temperature to 72 ‡ (22 †).
R Only use the "Windshield defrosting" func-
tion briefly until the windshield is clear
again. R
Only use air-recirculation mode briefly, e.g.
if there are unpleasant outside odors or
when in a tunnel. The windows could oth-
erwise fog up, since 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 á button goes out.
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
134Overview of climate control systems
Climate control

Optimum use of dual-zone climate
control
Climate control system
The following contains instructions and rec-
ommendations to enable you to get the most
out of your 3-zone automatic climate control.
R Activate climate control using the à and
¿ buttons. The indicator lamps in the
à and ¿ buttons light up.
R In automatic mode, you can also use theñ button to set the climate mode
(FOCUS/MEDIUM/DIFFUSE). The
MEDIUM level is recommended.
R Set the temperature to 72 ‡ (22 †).
R Only use the "Windshield defrosting" func-
tion briefly until the windshield is clear
again.
R Only use air-recirculation mode briefly, e.g.
if there are unpleasant outside odors or
when in a tunnel. The windows could oth-
erwise fog up, since 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 and the rear com-
partment as well. The indicator lamp in the
á button goes out.
R 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.
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 ECObutton ( Y page 154).
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
iSwitch on climate control primarily using
the à button ( Y page 139).
Switching on/off
X
Turn the SmartKey to position 2 in the igni-
tion lock ( Y page 149).
X To activate: press the à button.
The indicator lamp in the à button lights
up. Airflow and air distribution are set to
automatic mode.
or
X Press the ^ button.
The indicator lamp in the ^ button goes
out. The previously selected settings are
restored.
X To deactivate: press the ^ button.
The indicator lamp in the ^ button lights
up.
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,
deactivate the cooling with air-dehumidifica-
tion function only 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
Operating the climate control systems137
Climate control

dehumidified according to the temperature
selected.
Condensation may drip from the underside ofthe vehicle when it is in cooling mode. This is
normal and not a sign that there is a malfunc- tion.
Switching on/off
X To activate: press the ¿ button.
The indicator lamp in the ¿ button lights
up.
X To deactivate: press the ¿ button.
The indicator lamp in the ¿ button goes
out. The "Cooling with air dehumidification" function has a delayed switch-off feature.
138Operating the climate control systems
Climate control

Problems with the "Cooling with air dehumidification" function
ProblemPossible causes/consequences and M Solutions
The indicator lamp in
the ¿ 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
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,
deactivate the cooling with air-dehumidifica-
tion function only briefly.
Activating/switching
X Turn the SmartKey to position 2 in the igni-
tion lock ( Y page 149).
X Set the desired temperature.
X To activate: press the à button.
The indicator lamp in the à button lights
up. Automatic air distribution and airflow
are activated.
3-zone automatic climate control: when auto- matic mode is activated, you can set the cli-
mate mode ( Y page 139). X
To select manually: press the _ but-
ton.
or
X Press the K or I button.
The indicator lamp in the à button goes
out. Automatic air distribution and airflow
are deactivated.
Adjusting the climate mode settings
This function is only available with 3-zone
automatic climate control.
In automatic mode you can select the follow-
ing climate settings:
FOCUS high airflow that is set slightly cooler
MEDIUM medium airflow, standard setting
DIFFUSE low airflow that is set slightly warmer and with less draft
X Turn the SmartKey to position 2 in the igni-
tion lock ( Y page 149).
X Press the à button.
X Press the ñ button repeatedly until the
required climate setting appears in the dis-
play.
Operating the climate control systems139
Climate control

closed when the controls on the side air
vents are turned downwards.
Adjusting
XTurn the SmartKey to position 2 in the igni-
tion lock ( Y page 149).
X Press the _ button repeatedly until the
desired symbol appears in the display.
The indicator lamp in the à button goes
out. Automatic control is deactivated and
the air distribution is controlled according
to the selected setting.
Setting the airflow
X Turn the SmartKey to position 2 in the igni-
tion lock ( Y page 149).
X To increase/reduce: press the K or
I button.
iYou can use 3-zone automatic climate
control to set the airflow in the rear com-
partment separately.
If the battery is not sufficiently charged,
blower output may be reduced. As soon as
the battery is sufficiently charged, full blower output will be available.
Switching the ZONE function on/off
This function is only available in vehicles for
Canada.
X To activate: press the á button.
The indicator lamp in the á button lights
up.
Dual-zone automatic climate control: the
temperature setting for the driver's side is
not adopted for the front-passenger side.
3-zone automatic climate control: the tem-
perature setting for the driver's side is not
adopted for the front-passenger side and
the rear compartment.
When you press the buttons for temperature, airflow or air distribution, the temperature setting on the driver's side is not adopted for
the other climate control zones.
X To deactivate: press the á button.
The indicator lamp in the á button goes
out.
Dual-zone automatic climate control: the
temperature setting for the driver's side is
adopted for the front-passenger side.
3-zone automatic climate control: the tem- perature setting for the driver's side is
adopted for the front-passenger side and
the rear compartment.
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.
iYou should only select the "Windshield
defrosting" function until the windshield is
clear again.
X Turn the SmartKey to position 2 in the igni-
tion lock ( Y page 149).
X To activate: press the ¬ button.
The indicator lamp in the ¬ button 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
If the battery is not sufficiently charged,
blower output may be reduced. As soon as
the battery is sufficiently charged, full blower output will be available.
X To deactivate: press the ¬ button.
The indicator lamp in the ¬ button goes
out. The previously selected settings are
restored. Air-recirculation mode remains
deactivated.
or
Operating the climate control systems141
Climate control

XPress the à button.
The indicator lamp in the ¬ button goes
out. Airflow and air distribution are set to
automatic mode.
or X Turn temperature control : or B counter-
clockwise or clockwise ( Y page 133),
( Y page 136).
or
X Press the K or I button.
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.
When you activate MAX COOL, climate con-
trol switches to the following functions:
R maximum cooling
R maximum airflow
R air-recirculation mode on
X To activate: press the Ù button.
The indicator lamp in the Ù button lights
up.
X To deactivate: press the Ù button.
The indicator lamp in the Ù button goes
out. The previously selected settings are
restored.
Defrosting the windows
Windows fogged up on the inside
X Activate the ¿ cooling with air dehu-
midification function.
X Activate automatic mode Ã.
X Adjust the side air vents so that the warmed
air is directed to the side windows.
X If 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
X Activate the windshield wipers.
X Press the _ button repeatedly until the
O or P symbol appears in the dis-
play.
X Adjust the side air vents so that no air is
directed to the side windows.
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.
Switching on/off
X Turn the SmartKey to position 2 in the igni-
tion lock ( Y page 149).
X Press the ¤ button.
The indicator lamp in the ¤ button lights
up or goes out.
142Operating the climate control systems
Climate control

Problems with the rear window defroster
ProblemPossible causes/consequences and M Solutions
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.
Switching on/off
X Turn the SmartKey to position 2 in the igni-
tion lock ( Y page 149).
X To activate: press the g button.
The indicator lamp in the g button lights
up.
iIn the event of high pollution levels 10
or at
high outside temperatures, air-recircula-
tion mode is automatically activated. When
air-recirculation mode is activated auto-
matically, the indicator lamp in the g
button is not lit.
Outside air is added after about
30 minutes.
X To deactivate: press the g button.
The indicator lamp in the g button goes
out.
iAir-recirculation mode deactivates auto-
matically:
R after approximately five minutes at out-
side temperatures below approximately
41 ‡ (5 †)
R after approximately five minutes if cool-
ing with air dehumidification is deactiva-
ted
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 3-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 regard-
less of the airflow setting.
iIf you activate the residual heat function
at high temperatures, only the ventilation
will be activated. The blower runs at
medium speed.
10 3-zone automatic climate control only.
Operating the climate control systems143
Climate control