ignition MERCEDES-BENZ GL-Class 2014 X166 Service Manual

Brake lamp
X
Switch off the lights.
X Open the cargo compartment.
X Open the service flap (Y page 139).
X Turn bulb holder :counter-clockwise and
remove it.
X Take bulb out of bulb holder :.
X Insert the new bulb into bulb holder :.
X Insert bulb holder :into the lamp and turn
it clockwise.
X Close the service flap (Y page 139).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 collected 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 residues 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
becoming dirty in dry weather conditions,
the windshield 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
1
$ Windshield wiper off
2 Ä Intermittent wipe, low (rain sensor
set to low sensitivity)
3 Å Intermittent wipe, high (rain sensor
set to high sensitivity)
4 ° Continuous wipe, slow
5 ¯ Continuous wipe, fast
B í Single wipe
C î To wipe with washer fluid
X Switch on the ignition.
X Turn the combination switch to the
corresponding position.
In the ÄorÅ position, the appropriate
wiping frequency is set automatically
according to the intensity of the rain. In
the Å position, the rain sensor is more
sensitive than in the Äposition, causing
the windshield wipers to wipe more
frequently.
If the wiper blades are worn, the windshield
will no longer be wiped properly. This could
prevent you from observing the traffic
conditions. 140
Windshield wipersLights and
windshield wipers

Switching the rear window wiper on/
off Combination switch
:
è Rear window wiper switch
2 b To wipe with washer fluid
3 ITo switch on intermittent wiping
4 0To switch off intermittent wiping
5 ô To wipe with washer fluid
X Turn the SmartKey to position 1or 2in the
ignition lock (Y page 167).
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 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.
! 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
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.
X Fold the wiper arm away from the
windshield. X
Firmly press release knob :and pull wiper
blade ;upwards from the wiper arm in the
direction of the arrow. Windshield wipers
141Lights and windshield wipers Z

Installing the wiper blades
X
Position 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.
X Make sure that the wiper blade is seated
correctly.
X Fold the wiper arm back onto the
windshield.
Replacing the rear window wiper blade Removing a wiper blade
X
Remove the SmartKey from the ignition
lock.
X Fold wiper arm :away from the rear
window 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
window. 142
Windshield wipersLights and windshield wipers

Problems with the windshield wipers
Problem Possible causes/consequences and
M
MSolutions 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 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
workshop. Windshield wipers
143Lights and windshield wipers Z

Useful information
i This Operator's Manual describes all
models and all standard and optional
equipment of your vehicle available at the
time of publication of the Operator's
Manual. Country-specific differences are
possible. Please note that your vehicle may
not be equipped with all features
described. This also applies to safety-
related systems and functions.
i Read the information on qualified
specialist workshops: (Y page 28).Overview of climate control systems
Important safety notes
Observe the settings recommended on the
following pages. The windows could
otherwise fog up.
To prevent the windows from fogging up:
R switch off climate control only briefly
R switch on air-recirculation mode only
briefly
R switch on the cooling with air
dehumidification function
R switch 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.
Climate control can only be operated when
the engine is running. Optimum operation is
only achieved with the side windows and roof
closed.
The residual heat function can only be
activated or deactivated with the ignition
switched off (Y page 161).
i Ventilate the vehicle for a brief period
during warm weather, e.g. using the
convenience opening feature (Y page 95).
This will speed up the cooling process and
the desired interior temperature will be
reached more quickly. i
The integrated filter filters out most
particles 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 Booklet.
i It is possible that the residual heat
function may be activated automatically an
hour after the SmartKey has been removed
in order to dry the automatic climate
control. The vehicle is then ventilated for
30 minutes. 146
Overview of climate control systemsClimate control

L
To increase the airflow (Y page 158)
M To set the temperature (Y page 157)
N To set rear-compartment climate control to automatic (Y page 156)
O To direct the airflow through the rear air vents (Y page 158)
P To direct the airflow through the footwell vents (Y page 158)
Q To switch rear-compartment climate control on/off (Y page 154)
R To reduce the airflow (Y page 158)Information about using 3-zone
automatic climate control
The following contains instructions and
recommendations to enable you to get the
most out of your automatic climate control.
R Activate climate control using the Ãand
¿/Á buttons. The indicator lamps
above the Ãand¿/Á buttons
light up.
R In automatic mode, you can also use the
ñ 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 Use the ZONE function to adopt the
temperature settings on the driver's side
for the front-passenger side and the rear
compartment as well. The indicator lamp
above the ábutton 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 deactivated with the ignition switched
off.
R Vehicles with COMAND: if you change the
settings of the climate control system, the climate status display appears for
approximately three seconds at the bottom
of the screen in the COMAND display. See
also the separate COMAND operating
instructions. You will see the current
settings of the various climate control
functions.
Operating the climate control
systems
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
i
Switch on climate control primarily using
the à button (Y page 156).
In the rear compartment, you can also switch
climate control on and off using the Ãand
^ buttons. 154
Operating the climate control systemsClimate control

Activating/deactivating
X
Turn the SmartKey to position 2in the
ignition lock (Y page 167).
X To activate: press theÃbutton.
The indicator lamp in the Ãbutton 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-
dehumidification" 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
malfunction. Activating/deactivating Example:
¿button
X To activate: press the¿/Á button.
The indicator lamp in the ¿/Á
button lights up.
X To deactivate: press the¿/Á
button.
The indicator lamp in the ¿/Á
button goes out. The "Cooling with air
dehumidification" function has a delayed
switch-off feature. Operating the climate control systems
155Climate control

Problems with the "Cooling with air dehumidification" function
Problem Possible causes/consequences and
M
MSolutions The indicator lamp in
the
¿/Á button
flashes three times or
remains off. The
"Cooling with air
dehumidification"
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 If you deactivate the "Cooling with air-
dehumidification" 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.
In automatic mode, the set temperature is
maintained automatically at a constant level.
The system automatically regulates the
temperature of the dispensed air, the airflow
and the air distribution.
Automatic mode will achieve optimal
operation if cooling with air dehumidification
is also activated. If necessary, cooling with air
dehumidification can be deactivated.
In the rear compartment, you can also switch
climate control for the rear seats to automatic
mode using the Ãbutton. Activating/switching X
Turn the SmartKey to position 2in the
ignition lock (Y page 167).
X Set the desired temperature.
X To activate: press theÃbutton.
The indicator lamp in the Ãbutton lights
up. Automatic air distribution and airflow
are activated.
X To switch to manual mode: press the
_ button.
or
X Press the IorK button.
The indicator lamp in the Ãbutton goes
out.
3-zone automatic climate control: when
automatic mode is activated, you can select
a climate mode (Y page 157).156
Operating the climate control systemsClimate control

Adjusting the climate mode settings
You can select the following climate mode
settings in automatic mode:
FOCUS high airflow that is set slightly cooler
MEDIUM medium airflow, standard setting
DIFFUS Elow airflow that is set slightly
warmer and with less draft X
Turn the SmartKey to position 2in the
ignition lock (Y page 167).
X Press the Ãbutton.
X Press the ñbutton 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
driver's and front-passenger sides.
X
Turn the SmartKey to position 2in the
ignition lock (Y page 167).
X To increase/reduce: turn control:or
B clockwise or counter-clockwise
(Y page 147).
Only change the temperature setting in
small increments. Start at 72 ‡ (22 †). 3-zone automatic climate control
Automatic climate control zones
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 2in the
ignition lock (Y page 167).
X To increase/reduce the temperature in
the front: turn control :orB clockwise
or counter-clockwise (Y page 150).
Only change the temperature setting in
small increments. Start at 72 ‡ (22 †).
X To increase/reduce the temperature in
the rear compartment using the front
control panel: press theábutton.
The indicator lamp in the ábutton goes
out.
X Turn control :clockwise or counter-
clockwise (Y page 150).
Only change the temperature setting in
small increments. Start at 72 ‡ (22 †).
The temperature setting for the driver's
side is adopted for the rear compartment
and the front-passenger side.
X To increase/decrease the rear
compartment temperature using the
rear control panel: turn controlM
clockwise or counter-clockwise on the rear
control panel (Y page 150).
Only change the temperature setting in
small increments. Start at 72 ‡ (22 †). Operating the climate control systems
157Climate control

Setting the air distribution
Air distribution settings Front control panel
P
Directs the airflow through the center
vents
O Directs air through the footwell air
vents
S Directs the airflow through the center
and footwell vents
¯ Directs air through the defroster vents
b Directs the airflow through the
defroster and center vents (Canada
only)
a Directs air through the defroster and
footwell vents
_ Directs the airflow through the
defroster, center and footwell air vents
(Canada only)
Rear control panel
M Directs the airflow through the rear
center and rear side air vents
O Directs air through the footwell air
vents
i Using the rear control panel, you can also
activate both air distribution positions
simultaneously. 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. Adjusting X
Turn the SmartKey to position 2in the
ignition lock (Y page 167).
X Press the _button repeatedly until the
desired symbol appears in the display. Setting the airflow
X
Turn the SmartKey to position 2in the
ignition lock (Y page 167).
X To increase: press theKbutton.
X To reduce: press theIbutton.
i You can use 3-zone automatic climate
control to set the airflow in the rear
compartment separately. 158
Operating the climate control systemsClimate control