MERCEDES-BENZ GLS-Class SUV 2017 X166 Owner's Manual

XPress on housing cover:and turn it to the
right.
XReplace the cover in the front wheel housing
(Ypage 118).
High-beam headlamps
XSwitch off the lights.
XOpen the hood.
XTurn housing cover :counter-clockwise and
remove it.
XPull lever =upwards and remove bulb
holder ;.
XRemove the bulb from bulb holder ;.
XInsert the new bulb into bulb holder ;.
XSimultaneously press on bulb holder ;and
pull lever =downwards.
XPress on housing cover :and turn it clock-
wise.
Turn signals
XSwitch off the lights.
XOpen the hood.
XTurn housing cover :counter-clockwise and
remove it.
XTurn bulb holder ;counter-clockwise and
pull out.
XPull the bulb out of bulb holder ;.
XInsert new bulb into bulb holder ;.
XInsert bulb holder;and turn it clockwise.
XPress on housing cover :and turn it to the
right.
Windshield wipers
Switching the windshield wipers
on/off
!
Do not operate the windshield wipers when
the windshield is dry, as this could damage
the wiper blades. Moreover, dust that has col-
lected on the windshield can scratch the glass
if wiping takes place when the windshield is
dry.
If it is necessary to switch on the windshield
wipers in dry weather conditions, always use
washer fluid when operating the windshield
wipers.
!If the windshield wipers leave smears on the
windshield after the vehicle has been washed
in an automatic car wash, wax or other resi-
dues may be the reason for this. Clean the
windshield using washer fluid after washing
the vehicle in an automatic car wash.
!Intermittent wiping with rain sensor: due to
optical influences and the windshield becom-
ing dirty in dry weather conditions, the wind-
shield wipers may be activated inadvertently.
This could then damage the windshield wiper
blades or scratch the windshield.
For this reason, you should always switch off
the windshield wipers in dry weather.
Windshield wipers119
Lights and windshield wipers
Z

Combinationswitch
1
$ Windshield wiper off
2ÄIntermittent wipe, low (rain sensor set
to low sensitivity)
3Å Intermittent wipe, high (rain sensor
set to high sensitivity)
4° Continuous wipe, slow
5¯Continuous wipe, fast
BíSingle wipe
CîTo wipe with washer fluid
XSwitch on the ignition.
XTurn the combination switch to the corre-
sponding position.
In the ÄorÅ position, the appropriate
wiping frequency is set automatically according
to the intensity of the rain. In the Åposition,
the rain sensor is more sensitive than in
the Ä position, causing the windshield wiper
to wipe more frequently.
Vehicles with MAGIC VISION CONTROL: the
washer fluid is fed through the wiper blades and
when wiping with washer fluid îthe washer
fluid is emitted directly from the blades.
If the wiper blades are worn, the windshield will
no longer be wiped properly. This could prevent
you from observing the traffic conditions.
Switching the rear window wiper on/
off
Combination switch
:
è Rear window wiper switch
2bWipes with washer fluid
3ISwitches on intermittent wiping
40 Switches off intermittent wiping
5b Wipes with washer fluid
XTurn the SmartKey to position 1or 2in the
ignition lock (Ypage 138).
XTurn 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.
!To avoid damaging the wiper blades, make
sure that you touch only the wiper arm of the
wiper.
!Never open the hood/tailgate if a wiper arm
has been folded away from the windshield/
rear window.
Never fold a windshield wiper arm without a
wiper blade back onto the windshield/rear
window.
120Windshield wipers
Lights and windshield wipers

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 wind-
shield/rear window 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
XRemove the SmartKey from the ignition lock.
XFold the wiper arm away from the windshield.
XFirmly press release knob:and pull wiper
blade ;upwards from the wiper arm in the
direction of the arrow.
Installing the wiper blades
XPosition new wiper blade :in the retainer on
the wiper arm and slide it into place in the
direction of the arrow.
The wiper blade audibly engages.
XMake sure that the wiper blade is seated cor- rectly.
XFold the wiper arm back onto the windshield.
Replacing the rear window wiper blade
Removing a wiper blade
XRemove the SmartKey from the ignition lock.
XFold wiper arm :away from the rear window
until it engages.
XPosition wiper blade ;at a right angle to
wiper arm :.
XHold wiper arm :and press wiper blade ;
in the direction of the arrow until it releases.
XRemove wiper blade ;.
Installing a wiper blade
XPlace new wiper blade ;onto wiper arm :.
XHold wiper arm :and press wiper blade ;
in the opposite direction to the arrow until it
engages.
XMake sure that wiper blade ;is seated cor-
rectly.
XPosition wiper blade ;parallel to wiper
arm :.
XFold wiper arm :back onto the rear window.
Windshield wipers121
Lights and windshield wipers
Z

Problems with the windshield wipers
ProblemPossible causes/consequences andMSolutions
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.
or
XSwitch off the engine using the Start/Stop button and open the
driver's door.
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.
122Windshield wipers
Lights and windshield wipers

Overview of climate control systems
General notes
Observe the settings recommended on the fol-
lowing pages. The windows could otherwise fog
up.
To prevent the windows from fogging up:
Rswitch off climate control only briefly
Rswitch on air-recirculation mode only briefly
Rswitch on the cooling with air dehumidifica-
tion function
Rswitch on the defrost windshield function
briefly, if required
Climate control regulates the temperature and
the humidity in the vehicle interior and filters
undesirable substances out of the air.
The residual heat function can only be activated
or deactivated with the ignition switched off
(
Ypage 133).
iVentilate the vehicle for a brief period during
warm weather, e.g. using the convenience
opening feature (
Ypage 87).
This will speed up the cooling process and the
desired interior temperature will be reached
more quickly. If you start the engine using your smartphone,
the last selected climate control setting is reac-
tivated (
Ypage 140).
iThe integrated filter filters out most parti-
cles of dust and soot and completely filters
out pollen. It also reduces gaseous pollutants
and odors. 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 Maintenance Booklet. As it
depends on environmental conditions, e.g.
heavy air pollution, the interval may be
shorter than stated in the Maintenance Book-
let.
iVehicles with AIR-BALANCE package: in
addition to ionization, the vehicle has an air
filter with anti-allergenic properties that con-
tribute to improved air filtration.
iIt is possible that under certain circumstan-
ces the residual heat function may be activa-
ted automatically an hour after the SmartKey
has been removed in order to dry the auto-
matic climate control. The vehicle is then ven-
tilated for 30 minutes.
Control panel for dual-zone automatic climate control
USA only
Front control panel
:Sets the temperature, left (Ypage 131)
;Defrosts the windshield (Ypage 132)
Overview of climate control systems123
Climate control

=Switches the maximum cooling MAX COOL on or off (Ypage 132)
?Switches cooling with air dehumidification on/off (Ypage 130)
ASwitches the rear window defroster on/off (Ypage 133)
BSets the temperature, right (Ypage 131)
CSwitches air-recirculation mode on/off (Ypage 133)
DSets the air distribution (Ypage 131)
EIncreases the airflow (Ypage 131)
FReduces the airflow (Ypage 131)
GActivates/deactivates climate control (Ypage 129)
HSets climate control to automatic (Ypage 130)
Canada only
Front control panel
:Sets the temperature, left (Ypage 131)
;Defrosts the windshield (Ypage 132)
=Switches the ZONE function on/off (Ypage 132)
?Switches cooling with air dehumidification on/off (Ypage 130)
Switches the residual heat on or off (
Ypage 133)
ASwitches the rear window defroster on/off (Ypage 133)
BSets the temperature, right (Ypage 131)
CSwitches air-recirculation mode on/off (Ypage 133)
DSets the air distribution (Ypage 131)
EIncreases the airflow (Ypage 131)
FReduces the airflow (Ypage 131)
GActivates/deactivates climate control (Ypage 129)
HSets climate control to automatic (Ypage 130)
124Overview of climate control systems
Climate control

Rear control panel
:Sets rear-compartment climate control to automatic
;Switches the rear climate control on/off
=Directs the air distribution through the rear air vents
?Switches the seat heating on the right-hand side on/off
ADirects the air distribution through the footwell vents
BSwitches the seat heating on the left-hand side on/off
Control panel for 3-zone automatic climate control
USA only
Front control panel
:Sets the temperature, left (Ypage 131)
;Defrosts the windshield (Ypage 132)
=Switches the maximum cooling MAX COOL on or off (Ypage 132)
?Switches cooling with air dehumidification on/off (Ypage 130)
ASwitches the rear window defroster on/off (Ypage 133)
BSets the temperature, right (Ypage 131)
CSwitches the ZONE function on/off (Ypage 132)
DActivates/deactivates climate control (Ypage 129)
ESets the air distribution (Ypage 131)
Overview of climate control systems125
Climate control

FIncreases the airflow (Ypage 131)
GReduces the airflow (Ypage 131)
HDisplay
IAdjusts the climate mode settings (Ypage 130)
JSwitches air-recirculation mode on/off (Ypage 133)
KSets climate control to automatic (Ypage 130)
Rear control panel
LIncreases the airflow (Ypage 131)
MSets the temperature (Ypage 131)
NSets rear-compartment climate control to automatic (Ypage 130)
ODirects the airflow through the rear air vents (Ypage 131)
PSwitches the seat heating on the right-hand side on/off (Ypage 103)
QDirects the airflow through the footwell vents (Ypage 131)
RSwitches the rear climate control on/off (Ypage 129)
SReduces the airflow (Ypage 131)
TSwitches the seat heating on the left-hand side on/off (Ypage 103)
Canada only
Front control panel
:Sets the temperature, left (Ypage 131)
;Defrosts the windshield (Ypage 132)
=Switches the residual heat on or off (Ypage 133)
?Switches cooling with air dehumidification on/off (Ypage 130)
ASwitches the rear window defroster on/off (Ypage 133)
BSets the temperature, right (Ypage 131)
CSwitches the ZONE function on/off (Ypage 132)
DActivates/deactivates climate control (Ypage 129)
ESets the air distribution (Ypage 131)
FIncreases the airflow (Ypage 131)
GReduces the airflow (Ypage 131)
HDisplay
126Overview of climate control systems
Climate control

IAdjusts the climate mode settings (Ypage 130)
JSwitches air-recirculation mode on/off (Ypage 133)
KSets climate control to automatic (Ypage 130)
Rear control panel
LIncreases the airflow (Ypage 131)
MSets the temperature (Ypage 131)
NSets rear-compartment climate control to automatic (Ypage 130)
ODirects the airflow through the rear air vents (Ypage 131)
PSwitches the seat heating on the right-hand side on/off (Ypage 103)
QDirects the airflow through the footwell vents (Ypage 131)
RSwitches the rear climate control on/off (Ypage 129)
SReduces the airflow (Ypage 131)
TSwitches the seat heating on the left-hand side on/off (Ypage 103)
Control panel for 3-zone automatic climate control with additional rear-com-
partment climate control
USA only
Front control panel
:Sets the temperature, left (Ypage 131)
;Defrosts the windshield (Ypage 132)
=Switches the maximum cooling MAX COOL on or off (Ypage 132)
?Switches cooling with air dehumidification on/off (Ypage 130)
Switches the residual heat on or off (
Ypage 133)
ASwitches the rear window defroster on/off (Ypage 133)
BSets the temperature, right (Ypage 131)
CSwitches the ZONE function on/off (Ypage 132)
DSwitches the rear climate control on/off (Ypage 129)
ESets the air distribution (Ypage 131)
FIncreases the airflow (Ypage 131)
Overview of climate control systems127
Climate control

GReduces theairflow (Ypage 131)
Switches off climat econtrol
HDisplay
IAdjusts th eclimat emod esetting s (Ypage 130)
JSwitches air-recirculation mod eon/off (Ypage 133)
KSets climat econtrol to automatic (Ypage 130)
Rea rcontrol panel
LIncrease sth eairflow (Ypage 131)
MSets thetemperature (Ypage 131)
NSets rear-compartmen tclimat econtrol to automatic (Ypage 130)
ODirects theairflow throug hth erear air vents (Ypage 131)
PDirects theairflow throug hth efootwell vents (Ypage 131)
QSwitches therear climat econtrol on/off (Ypage 129)
RReduces theairflow (Ypage 131)
Canadaonly
Front control panel
:Sets th etemperature, lef t (Ypage 131)
;Defroststh ewindshield (Ypage 132)
=Switches th eZON Efunction on/off (Ypage 132)
?Switches coolingwit hair dehumidification on/off (Ypage 130)
Switches th eresidual heat on or off (
Ypage 133)
ASwitches therear window defroste ron/off (Ypage 133)
BSets thetemperature, right (Ypage 131)
CSwitches therear climat econtrol on/off
DActivates/deactivates climat econtrol (Ypage 129)
ESets theair distribution (Ypage 131)
FIncreasesth eairflow (Ypage 131)
GReduces th eairflow (Ypage 131)
HDisplay
IAdjusts th eclimat emod esetting s (Ypage 130)
JSwitches air-recirculation mod eon/off (Ypage 133)
128Overview of climate control systems
Climate control