light MERCEDES-BENZ GLS 2018 Workshop Manual

The headlamp range is set automatically
depending on the distance between the vehi-
cle and other road users.
If you are driving at speeds above approx-
imately 19 mph (30 km/ h) and no other road
users have been detected:
The high-beam headlamps are switched on
automatically. The W indicator lamp in the
instrument cluster also lights up.
If you are driving at speeds below approx-
imately 16 mph (25 km/h) or other road users
have been detected or the roads are ade-
quately lit:
The high-beam headlamps are switched off
automatically. The W indicator lamp in the
instrument cluster goes out. The

Aut oma tic interi or lighting cont rolX
To switch on: set th e switch to center posi-
tion

Replacing the rear window wiper blade Removing a wiper blade X
Remove the SmartKey from the ignition lock. X
Fold wiper arm C away from the rear window
until it engages. X
Position wiper blade D at a right angle to
wiper arm C . X
Hold wiper arm C and press wiper blade D
in the direction of the arrow until it releases. X
Remove wiper blade D .
Installing a wiper blade X
Place new wiper blade D onto wiper arm C .X
Hold wiper arm C and press wiper blade D
in the opposite direction to the arrow until it
engages. X
Make sure that wiper blade D is seated cor-
rectly. X
Position wiper blade D parallel to wiper
arm C . X
Fold wiper arm C back onto the rear window.
Problems with the windshield wipers Problem
Possible causes/consequences and P 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 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 wipers
Lights and windshield wipers

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

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

Key positions with KEYLESS- GO
C
Start/Sto p butto nD
Ignition loc k
As soo n as th e ignition is switched on , all th e
indicator lamps in th e instrumen t cluste r ligh t
up. Further information on situation s wher e an
indicator lamp either fails to go out after starting
th e engin e or lights up while driving
( Y
page 281).
If Start/Sto p butto n C has no t yet been
pressed, this correspond s to th e SmartKey
bein g remove d from th e ignition .X
To switch on th e power supply : press
Start/Sto p butto n C once.
The power suppl y is switched on . You can no w
activat e th e windshield wipers, for example .
The power suppl y is switched off again if:R
th e driver' s door is opened andR
you press Start/Sto p C butto n twice when in
this position X
To switch on th e ignition: press Start/Sto p
butto n C twice.
The ignition is switched on .
If you press Start/Sto p butto n C once when
in this position , th e ignition is deactivated
again .
Removing the Start/S top but ton
You can remove th e Start/Sto p butto n from th e
ignition loc k and start th e vehicl e as normal
usin g th e SmartKey.
It is possible to switch between KEYLESS-GO
mod e and ke y operation only when th e trans -
mission is in position ] .X
Remove Start/Sto p butto n C fr om ignition
loc k D . You do no t have to remove th e Start/Sto p but -
to n from th e ignition loc k when you leav e th e
vehicle. You should, however , always tak e th e
SmartKey wit h you when leaving th e vehicle. As
lon g as th e SmartKey is in th e vehicle:R
th e vehicl e can be started usin g th e Start /
Stop butto n R
th e electrically powered equipmen t can be
operate d
Starting the engine
Important safety notes
G WARNIN G
If children are lef t unsupervised in th e vehicle,
they could: R
open th e doors, thus endangering other
people or road users. R
get out and disrupt traffic. R
operate th e vehicle's equipment.
Additionally, children could set th e vehicl e in
motion if, for example , they:R
release th e parking brake. R
shiftin g th e automatic transmission out of
park positio n P R
Start th e engine.
Ther e is a ris k of an acciden t and injury.
When leaving th e vehicle, always tak e th e
SmartKey wit h you and loc k th e vehicle. Never
leav e children or animals unattended in th e
vehicle. Always keep th e SmartKey out of
reac h of children .
G WARNIN G
Combustion engines emit poisonous exhaust
gase s suc h as carbon monoxide. Inhalin g
these exhaust gase s leads to poisoning . Ther e
is a ris k of fatal injury. Therefore never leav e
th e engin e runnin g in enclosed spaces with-
out sufficien t ventilation .
G WARNIN G
Flammable materials introduce d throug h
environmental influence or by animals can Driving 141
Driving and parking Z

ignite if in contact with the exhaust system or
parts of the engine that heat up. There is a risk
of fire.
Carry out regular checks to make sure that
there are no flammable foreign materials in
the engine compartment or in the exhaust
system.
General notes Vehicles with a gasoline engine: the catalytic
converter is preheated for up to 30 seconds
after a cold start. The sound of the engine may
change during this time.
Automatic transmission X
Shift the transmission to position ]
( Y
page 148).
The transmission position indicator on the
multifunction display shows ]
( Y
page 149).
i You can start the engine in transmission
position ] and \\ .
Starting procedure with the SmartKey X
To start a diesel engine: turn the SmartKey
to position H in the ignition lock
( Y
page 140).
The \( preglow indicator lamp in the instru-
ment cluster lights up. X
Turn the SmartKey to position I in the igni-
tion lock ( Y
page 140) and release it as soon
as the engine is running.
i Vehicles with a diesel engine: you can
start the engine without preglow if the engine
is warm.
Using KEYLESS-GO to start the engine The Start/Stop button can be used to start the
vehicle without inserting the SmartKey into the
ignition lock. The Start/Stop button must be
inserted in the ignition lock and the SmartKey
must be in the vehicle. This mode for starting the
engine operates independently of the ECO
start/stop automatic engine start function. X
Depress the brake pedal and keep it
depressed. X
Press the Start/Stop button once
( Y
page 140).
Vehicles with a gasoline engine: the engine
starts.
Vehicles with a diesel engine: preglow is
activated and the engine starts.
Starting procedure via smartphone Observe the important safety notes on starting
the engine ( Y
page 141).
You can also start your engine via your smart-
phone from outside the vehicle. In this case, the
previously selected climate control setting is
activated. In this way you can cool or heat the
interior of the vehicle before starting the jour-
ney.
Only start the engine via your smartphone if it is
safe to start and run the engine where your vehi-
cle is parked.
Observe the legal stipulations in the area where
your vehicle is parked. Engine start via smart-
phone may be limited to certain countries or
regions.
You can execute a maximum of two consecutive
starting attempts via your smartphone. If you
insert the SmartKey into the ignition lock, you
can carry out two more starting attempts.
Once you have started the engine, you can
switch the engine off via your smartphone at any
time.
You can only start the engine via your smart-
phone if: R
the SmartKey is in the ignition lock R
park position ] is selectedR
the accelerator pedal is not depressed R
the anti-theft alarm system is not activated R
the panic alarm is not activated R
the hazard warning lamps are switched off R
the hood is closed R
the doors are closed and locked R
the windows and sliding sunroof are closed
Also make sure that: R
the fuel tank is sufficiently filled R
the starter battery is sufficiently charged142
Driving
Driving and parking

Aut oma tic engine startThe engin e start s automatically if:R
you switch off th e ECO start/sto p function by
pressing th e ECO butto nR
in transmission position D or N th e brak e
pedal is release d and th e HOLD function is no t
active R
you depress th e accelerato r pedalR
you engage revers e gear RR
you mov e th e transmission out of position PR
you switch to th e Sport Plu s or Sport drive
program (Mercedes-AM G vehicles)R
you activat e manual gearshifting (Mercedes-
AM G vehicles)R
you switch to th e Offroa d drive program
(vehicles without Off-Road Engineering pack-
age) R
you switch to th e Offroa d or Offroa d Plu s
drive program (vehicles wit h Off-Road Engi-
neering package) R
you unfasten your seat belt or open th e driv-
er' s doorR
th e vehicl e start s to rol lR
th e brak e system require s thisR
th e temperature in th e vehicl e interior devi-
ate s from th e set rangeR
th e system detects moisture on th e wind-
shield when th e air-conditioning system is
switched on R
th e battery's condition of charge is to o low
Shifting th e transmission to position P does no t
start th e engine. Deactivating or activating the ECO
start/stop function All vehicles (excep t Mercedes-AM G veh i-
cles) X
To deactivate: press ECO butto n C .
Indicato r lamp D goe s out .X
To activate: press ECO butto n C .
Indicato r lamp D lights up.
If indicator lamp D is off , th e ECO start/sto p
function has been deactivated manually or as
th e result of a malfunction .
Mercedes-AM G veh icles
X
To deactivate: in th e Comfor t drive pro -
gram , press ECO butto n C .
or X
Activat e manual gearshifting ( Y
page 152).
or X
Switc h to th e Sport Plu s or Sport drive pro -
gram ( Y
page 147).
Indicato r lamp D goes out .X
To activate: press ECO butto n C .
Indicato r lamp D lights up. When th e
Sport Plu s or Sport drive program is activa-
ted, th e automatic transmission switches to
th e Comfor t drive program .Driving 145
Driving and parking Z