MERCEDES-BENZ GLS 2018 Owners Manual

y
Directs the airflow through the footwell vents ( Y
page 133)z
Switches the rear climate control on/off ( Y
page 131){
Reduces the airflow ( Y
page 133)|
Switches the seat heating on the left-hand side on/off ( Y
page 106)
Control panel for 3-zone automatic climate control with additional rear-com-
partment climate control
USA only
Front control panelC
Sets the temperature, left ( Y
page 132)D
Defrosts the windshield ( Y
page 133)

v
Sets rear-compartment climate control to automatic ( Y
page 132)w
Directs the airflow through the rear air vents ( Y
page 133)x
Directs the airflow through the footwell vents ( Y
page 133)y
Switches the rear climate control on/off ( Y
page 131)z
Reduces the airflow ( Y
page 133)
Canada only
Front control panelC
Sets the temperature, left ( Y
page 132)D
Defrosts the windshield ( Y
page 133)

y
Switches the rear climate control on/off ( Y
page 131)z
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
X and Z or X and V buttons.
The indicator lamps in the X and
Z buttons or the X and V buttons
light up. R
Vehicles with 3-zone automatic climate
control: in automatic mode, you can also use
the

Problems with the "Cooling with air dehumidification" function Problem
Possible causes/consequences and P Solutions
The indicator lamp in the
Z or V 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 X button.
Automatic control X
Turn the SmartKey to position H in the igni-
tion lock ( Y
page 140).X
Set the desired temperature. X
To activate: press the X button.
The indicator lamp in the X button lights
up. Automatic air distribution and airflow are
activated. X
To switch to manual mode: press the

The temperature setting for the driver's side
is adopted for the rear compartment and the
front-passenger side. X
Turn thumbwheel C to 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 u counter-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

Activating/deactivating X
Turn th e SmartKey to position H in th e igni-
tion loc k ( Y
page 140).X
To activate: press th e d button.
The indicator lamp in th e d butto n lights
up.
The climat e control system switches to th e
followin g settings:R
high airflow R
high temperature R
air distribution to th e windshield and fron t
side windows R
air-recirculation mod e offX
To deactivate: press th e d button.
The indicator lamp in th e d butto n goe s
out . The previously selected setting s are
restored . Air-recirculation mod e remain s
deactivated.
MAX COOL ma ximum coolingThe MA X COOL function is only available in vehi-
cle s for th e USA.
MA X COOL is only operational when th e engin e
is running. X
To activate: press th e

Problems with the rear window defroster Problem
Possible causes/consequences and P 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.
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 H in the igni-
tion lock ( Y
page 140).X
To activate: press the

The ionization of the interior air is odorless and
cannot be perceived directly in the vehicle inte-
rior.
You can switch ionization on and off via the mul-
timedia system (see the Digital Operator's Man-
ual).
Ionization can only be operated when the auto-
matic climate control is switched on. The side air
vent on the driver's side must be open.
Setting the air vents
Important safety notes
G WARNING
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: R
keep the air inlet grille on the hood and in the
engine compartment on the front-passenger
side free of blockages, such as ice, snow or
leaves. R
never cover the air vents or air intake grilles in
the vehicle interior.
i For virtually draft-free ventilation, adjust the
sliders of the air vents to the center position. Setting the center air vents
C
Center air vent, left D
Center air vent, right

C
Air vent controlD
Air vent
When the climate control system is activated,
the glove box can be ventilated, for instance to
cool its contents. The level of airflow depends on
the airflow and air distribution settings. X
To open or close: turn thumbwheel C to the
right or left.
Setting the rear-compartment air
vents
Setting the center vents in the rear com-
partment
Example: center vents with rear control panel
C
Rear-compartment air vent thumbwheel
D
Rear-compartment air vent, right

Third row of seats
B-pillar air vent in the headliner
C
B-pillar air ventD
Thumbwheel for B-pillar air vent X
To open or close: turn thumbwheel D up or
down.138
Setting the air vents
Climate control