light MERCEDES-BENZ GLS 2019 Repair Manual

Halogen headlamps
0043
Low-beam headlamp: H7 55 W
0044 High-beam headlamp: H7 55 W
0087 Turn signal: W 5 W BV Removing and installing the cover in
the front wheel housing You must remove the cover from the front wheel
housing before you can change the front bulbs.
X To remove: switch off the lights.
X Turn the front wheel inwards.
X Remove securing pin 0044using a suitable tool.
X Slide cover 0043up and remove it.
X To install: insert cover 0043again and slide it
down until it engages.
X Insert securing pin 0044. Low-beam headlamps
X
Remove the cover in the front wheel housing
(Y page 121).
X Turn housing cover 0043counter-clockwise and
remove it.
X Turn bulb holder 0044counter-clockwise and
pull out.
X Pull the bulb out of bulb holder 0044.
X Insert new bulb into bulb holder 0044.
X Insert bulb holder 0044and turn it clockwise.
X Press on housing cover 0043and turn it to the
right.
X Replace the cover in the front wheel housing
(Y page 121). High-beam headlamps
X
Switch off the lights.
X Open the hood.
X Turn housing cover 0043counter-clockwise and
remove it.
X Pull lever 0087upwards and remove bulb
holder 0044.
X Remove the bulb from bulb holder 0044.
X Insert the new bulb into bulb holder 0044. Replacing bulbs (vehicles with halogen headlamps)
121Lights and windshield wipers Z

X
Simultaneously press on bulb holder 0044and
pull lever 0087downwards.
X Press on housing cover 0043and turn it clock-
wise. Turn signals
X
Switch off the lights.
X Open the hood.
X Turn housing cover 0043counter-clockwise and
remove it.
X Turn bulb holder 0044counter-clockwise and
pull out.
X Pull the bulb out of bulb holder 0044.
X Insert new bulb into bulb holder 0044.
X Insert bulb holder 0044and turn it clockwise.
X Press on housing cover 0043and 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. Combination switch
0047
003F Windshield wiper off
0048 0062 Intermittent wipe, low (rain sensor set
to low sensitivity)
0049 0063 Intermittent wipe, high (rain sensor
set to high sensitivity)
004A 00AA Continuous wipe, slow
004B 00A9 Continuous wipe, fast
0084 00D3 Single wipe
006B 00D4 To wipe with washer fluid
X Switch on the ignition.
X Turn the combination switch to the corre-
sponding position.
In the 0062or0063 position, the appropriate
wiping frequency is set automatically according
to the intensity of the rain. In the 0063position,
the rain sensor is more sensitive than in
the 0062 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 00D4the 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. 122
Windshield wipersLights and windshield wipers

Switching the rear window wipers
on/off
Combination switch
0043
00C5 Rear window wiper switch
0048 008E Wipes with washer fluid
0049 ISwitches on intermittent wiping
004A 0Switches off intermittent wiping
004B 008E Wipes with washer fluid
X Turn the SmartKey to position 0047or0048
(Y page 140).
X Turn switch 0043on the combination switch to
the corresponding position.
When the rear window wiper is switched on,
the 00C5 symbol appears in the assistance
graphic in the instrument cluster. Further
information on the assistance graphic
(Y page 238). Replacing the wiper blades
Important safety notes G
WARNING
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.
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
X Remove the SmartKey from the ignition lock.
X Fold the wiper arm away from the windshield. X
Firmly press release knob 0043and pull wiper
blade 0044upwards from the wiper arm in the
direction of the arrow.
Installing the wiper blades Windshield wipers
123Lights and windshield wipers Z

X
Position new wiper blade 0043in the retainer on
the wiper arm and slide it into place in the
direction of the arrow.
The wiper blade audibly engages.
X Make sure that the wiper blade is seated cor-
rectly.
X Fold the wiper arm back onto the windshield.
Changing the rear window wiper blade Removing a wiper blade X
Remove the SmartKey from the ignition lock.
X Fold wiper arm 0043away from the rear window
until it engages.
X Position wiper blade 0044at a right angle to
wiper arm 0043.
X Hold wiper arm 0043and press wiper blade 0044
in the direction of the arrow until it releases.
X Remove wiper blade 0044.
Installing a wiper blade
X Place new wiper blade 0044onto wiper arm 0043.
X Hold wiper arm 0043and press wiper blade 0044
in the opposite direction to the arrow until it
engages.
X Make sure that wiper blade 0044is seated cor-
rectly.
X Position wiper blade 0044parallel to wiper
arm 0043.
X Fold wiper arm 0043back onto the rear window. Problems with the windshield wipers
Problem
Possible causes/consequences and
0050 0050Solutions 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 igni-
tion lock.
or X Switch off the engine using the Start/Stop button and open 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 work-
shop. 124
Windshield wipersLights and windshield wipers

0079
Switches the rear climate control on/off (Y page 131)
007A Reduces the airflow (Y page 133)Optimum use of automatic climate
control
The following contains notes and recommenda-
tions on optimum use of the dual-zone auto-
matic climate control or 3-zone automatic cli-
mate control.
R You can switch on climate control by using the
0058 and005A or0058 and0056 buttons.
The indicator lamps in the 0058and
005A buttons or the 0058and0056 buttons
light up.
R Vehicles with 3-zone automatic climate
control: in automatic mode, you can also use
the 00F0 button to set a climate mode
(FOCUS/MEDIUM/DIFFUSE). The MEDIUM
level is recommended.
R Set the temperature to 72 ‡ (22 †).
R Only use the "Windshield defrosting" function
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 otherwise fog up,
since no fresh air is drawn into the vehicle in
air-recirculation mode.
R Vehicles with 3-zone automatic climate
control: use the ZONE function to adopt the
temperature settings on the driver's side for
the front-passenger side and the rear com-
partment as well. The indicator lamp above
the 00D6 button goes out.
R Vehicles with 3-zone automatic climate
control: use the "residual heat" function if
you want to heat or ventilate the vehicle inte- rior when the ignition is switched off. The
residual heat function can only be activated or
deactivated with the ignition switched off.
R If you change the settings of the climate con-
trol system, the climate status display
appears for approximately three seconds at
the bottom of the screen in the multimedia
system display. You will see the current set-
tings of the various climate control functions.
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 (Y page 145). 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
Activate climate control primarily using the
0058 button (Y page 132).
In the rear compartment, you can also switch
climate control on and off using the 0058and
0078 buttons.
Activating/deactivating X
Turn the SmartKey to position 0048in the igni-
tion lock (Y page 140).
X To activate: press the0058button.
The indicator lamp in the 0058button lights
up. Airflow and air distribution are set to auto-
matic mode.
X To deactivate: press the0078button.
The indicator lamp in the 0078button lights
up. Switching cooling with air dehumidi-
fication on/off
Activating/deactivating X
To activate: press the005Aor0056 button.
The indicator lamp in the 005Aor0056 button
lights up.
X To deactivate: press the005Aor0056 but-
ton.
The indicator lamp in the 005Aor0056 button
goes out. The "Cooling with air dehumidifica-
tion" function has a delayed switch-off fea-
ture. Operating the climate control systems
131Climate control

Problems with the "Cooling with air dehumidification" function
Problem
Possible causes/consequences and
0050
0050Solutions The indicator lamp in the
005A or0056 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 mal-
function.
X Visit a qualified specialist workshop. Setting climate control to automatic
General notes 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.
In the rear compartment, you can also switch
climate control for the rear seats to automatic
mode using the 0058button.
Automatic control X
Turn the SmartKey to position 0048in the igni-
tion lock (Y page 140).
X Set the desired temperature.
X To activate: press the0058button.
The indicator lamp in the 0058button lights
up. Automatic air distribution and airflow are
activated.
X To switch to manual mode: press the008F
button.
3-zone automatic climate control: when auto-
matic mode is activated, you can select a cli-
mate mode (Y page 132). Adjusting the climate mode settings
You can select the following climate mode set-
tings in automatic mode:
FOCUS high airflow, slightly cooler setting
MEDIUM medium airflow, standard setting
DIFFUSE low airflow, slightly warmer and draft- free setting X
Turn the SmartKey to position 0048in the igni-
tion lock (Y page 140).
X Press the 0058button.
X Press the 00F0button repeatedly until the
desired climate mode appears in the display. Setting the temperature
Dual-zone automatic climate control Different temperatures can be set for the driv-
er's and front-passenger sides.
X Turn the SmartKey to position 0048in the igni-
tion lock (Y page 140).
X To increase or decrease: turn control0043or
0084 counter-clockwise or clockwise
(Y page 125).
Only change the temperature setting in small
increments. Start at 72 ‡ (22 †).
3-zone automatic climate control You can select different temperature settings
for the driver's and front-passenger sides as well
as for the rear compartment.
X Turn the SmartKey to position 0048in the igni-
tion lock (Y page 140).
X To increase or decrease temperature in
the front compartment:
turn control0043or
0084 counter-clockwise or clockwise
(Y page 127).
Only change the temperature setting in small
increments. Start at 72 ‡ (22 †).
X To increase or reduce the temperature in
the rear compartment using the front con-
trol panel: press the00D6button.
The indicator lamp in the 00D6button goes
out. 132
Operating the climate control systemsClimate control

The temperature setting for the driver's side
is adopted for the rear compartment and the
front-passenger side.
X Turn thumbwheel 0043to the left or right
(Y page 127).
Only change the temperature setting in small
increments. Start at 72 ‡ (22 †).
X To increase or decrease the rear compart-
ment temperature using the rear control
panel: turn control 0075counter-clockwise or
clockwise on the rear control panel
(Y page 127).
Only change the temperature setting in small
increments. Start at 72 ‡ (22 †). Setting the air distribution
Air distribution settings Front control panel
009C
Directs the airflow through the center
vents
009B Directs air through the footwell air vents
009F Directs the airflow through the center
and footwell vents
0061 Directs air through the defroster vents
0087 Directs the airflow through the defroster
and center vents (Canada only)
0086 Directs air through the defroster and
footwell vents
008F Directs the airflow through the defroster,
center and footwell air vents (Canada
only)
Rear control panel
0099 Directs the airflow through the rear cen-
ter and B-pillar air vents
009B Directs air through the footwell air vents
i Using the rear control panel, you can also
activate both air distribution positions simul-
taneously. In order to do this, press both air
distribution buttons. The air is then routed
through all rear air vents.
i Regardless of the air distribution setting,
airflow is always directed through the side air vents. The side air vents can only be closed
when the controls on the side air vents are
turned downwards. Setting X
Turn the SmartKey to position 0048in the igni-
tion lock (Y page 140).
X Press the 008Fbutton repeatedly until the
desired symbol appears in the display. Setting the airflow
X Turn the SmartKey to position 0048in the igni-
tion lock (Y page 140).
X To increase: press the0097button.
X To reduce: press the0095button.
i You can use 3-zone automatic climate con-
trol to set the airflow in the rear compartment
separately. Switching the ZONE function on/off
X To activate: press the00D6button.
The indicator lamp above the 00D6button
lights up.
Dual-zone automatic climate control: the tem-
perature 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.
X To deactivate: press the00D6button.
The indicator lamp above the 00D6button
goes out.
Dual-zone automatic climate control: the tem-
perature setting for the driver's side is adop-
ted for the front-passenger side.
3-zone automatic climate control: the tem-
perature setting for the driver's side is adop-
ted for the front-passenger side and the rear
compartment. Defrosting the windshield
General notes You can use this function to defrost the wind-
shield or to clear a fogged up windshield or front
side windows on the inside.
Switch off the "Windshield defrosting" function
as soon as the windshield is clear again. Operating the climate control systems
133Climate control

Activating/deactivating
X
Turn the SmartKey to position 0048in the igni-
tion lock (Y page 140).
X To activate: press the0064button.
The indicator lamp in the 0064button lights
up.
The climate control system switches to the
following settings:
R high airflow
R high temperature
R air distribution to the windshield and front
side windows
R air-recirculation mode off
X To deactivate: press the0064button.
The indicator lamp in the 0064button goes
out. The previously selected settings are
restored. Air-recirculation mode remains
deactivated. 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.
X To activate: press the00C9button.
The indicator lamp in the 00C9button lights
up.
X To deactivate: press the00C9button.
The indicator lamp in the 00C9button goes
out. The previously selected settings are
restored.
When you activate MAX COOL, climate control
switches to the following functions: R maximum cooling
R maximum airflow
R air-recirculation mode on Removing condensation from the win-
dows
Windows fogged up on the inside X
Activate the 005Aor0056 cooling with air
dehumidification function.
X Activate automatic mode 0058.
X If the windows continue to fog up, activate the
"windshield defrosting" function
(Y page 133).
i You 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 008Fbutton repeatedly until the
009C or009B symbol appears in the display.
i You should only select this setting until the
windshield is clear again.
i If you clean the windows regularly, they do
not fog up so quickly. 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.
If the battery voltage is too low, the rear window defroster may switch off.
Activating/deactivating X
Turn the SmartKey to position 0048in the igni-
tion lock (Y page 140).
X Press the 006Cbutton.
The indicator lamp in the 006Cbutton lights
up or goes out. 134
Operating the climate control systemsClimate cont
rol

Problems with the rear window defroster
Problem
Possible causes/consequences and
0050
0050Solutions 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. 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.
Activating/deactivating X
Turn the SmartKey to position 0048in the igni-
tion lock (Y page 140).
X To activate: press the0089button.
The indicator lamp in the 0089button lights
up.
i In the event of high pollution levels (3-zone
automatic climate control only) or at high out-
side temperatures, air-recirculation mode is
automatically activated. When air-recircula-
tion mode is activated automatically, the indi-
cator lamp in the 0089button is not lit.
Outside air is added after about 30 minutes.
X To deactivate: press the0089button.
The indicator lamp in the 0089button goes
out.
i Air-recirculation mode deactivates auto-
matically:
R after approximately five minutes at outside
temperatures below approximately 41 ‡
(5 †)
R after approximately five minutes if cooling
with air dehumidification is deactivated
R after approximately 30 minutes at outside
temperatures above approximately 41 ‡ (5 †) if the "Cooling with air dehumidifi-
cation" function is activated Switching the residual heat on or off
General notes The residual heat function is only available on
vehicles for Canada.
It is possible to make use of the residual heat of
the engine to continue heating the stationary
vehicle for up to 30 minutes after the engine has been switched off. The heating time depends on
the set interior temperature.
Activating/deactivating X
To activate: press the004Bor0056 button.
The indicator lamp in the 004Bor0056 button
lights up.
i The blower will run at a low speed regardless
of the airflow setting.
i If you activate the residual heat function at
high temperatures, only the ventilation will be
activated. The blower runs at medium speed.
X To deactivate: press the004Bor0056 but-
ton.
The indicator lamp in the 004Bor0056 button
goes out.
Residual heat is deactivated automatically:
R after approximately 30 minutes
R when the ignition is switched on
R if the battery voltage drops Ionization
Ionization is used to purify the air in the vehicle interior and attain an improved interior climate. Operating the climate control systems
135Climate control

Key positions with KEYLESS-GO
0043
Start/Stop button
0044 Ignition lock
As soon as the ignition is switched on, all the
indicator lamps in the instrument cluster light
up. Further information on situations where an
indicator lamp either fails to go out after starting the engine or lights up while driving
(Y page 276).
If Start/Stop button 0043has not yet been
pressed, this corresponds to the SmartKey
being removed from the ignition.
X To switch on the power supply: press
Start/Stop button 0043once.
The power supply is switched on. You can now activate the windshield wipers, for example.
The power supply is switched off again if:
R the driver's door is opened and
R you press Start/Stop 0043button twice when in
this position
X To switch on the ignition: press Start/Stop
button 0043twice.
The ignition is switched on.
If you press Start/Stop button 0043once when
in this position, the ignition is deactivated
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.
It is possible to switch between KEYLESS-GO
mode and key operation only when the trans-
mission is in position 005D.
X Remove Start/Stop button 0043from ignition
lock 0044. 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:
R the vehicle can be started using the Start/
Stop button
R the electrically powered equipment can be
operated Starting the engine
Important safety notes G
WARNING
If children are left unsupervised in the vehicle, they could:
R open the doors, thus endangering other
people or road users.
R get out and disrupt traffic.
R operate the vehicle's equipment.
Additionally, children could set the vehicle in
motion if, for example, they:
R release the parking brake.
R shifting the automatic transmission out of
park position P
R Start 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. G
DANGER
Combustion engines emit poisonous exhaust
gases such as carbon monoxide. Inhaling
these exhaust gases is hazardous to health
and can result in poisoning. There is a risk of
fatal injury. Therefore, never leave the engine running an enclosed space without adequate
ventilation. Driving
141Driving and pa rking Z