2016 MERCEDES-BENZ GL key

Useful information
i This Operator's Manual describes all
models and all standard and optional equip-
ment 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 special-
ist workshops ( Y
page 29).
Overview of climate control systems
General notesObserve the settings recommended on the
following pages. The windows could other-
wise 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 dehumidifi-
cation 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 acti-
vated or deactivated with the ignition
switched off ( Y
page 159).
i Ventilate the vehicle for a brief period
during warm weather, e.g. using the con-
venience opening feature ( Y
page 99).
This will speed up the cooling process and
the desired interior temperature will be
reached more quickly. i The integrated filter filters out most par-
ticles of dust and soot and completely fil-
ters out pollen. It also reduces gaseous pol-
lutants 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 under certain circum-
stances 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.144
Overview of climate control systems
Climate control

Problems with the "Cooling with air dehumidification" function Problem
Possible causes/consequences and P Solutions
The indicator lamp in
the Z or V but-
ton flashes three times
or remains off. The
"Cooling with air dehu-
midification" 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-dehu-
midification" function, the air inside the vehi-
cle will not be cooled. The air inside the vehi-
cle will also not be dehumidified. The win-
dows can fog up more quickly. Therefore, only
deactivate the "Cooling with air-dehumidifi-
cation" function briefly.
In automatic mode, the set temperature is
maintained automatically at a constant level.
The system automatically regulates the tem-
perature of the dispensed air, the airflow and
the air distribution.
Automatic mode will achieve optimal opera-
tion if cooling with air dehumidification is also
activated. If necessary, cooling with air dehu-
midification can be deactivated.
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 2 in the igni-
tion lock ( Y
page 165). 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

Adjusting the climate mod e settingsYou can select th e followin g climat e mod e
setting s in automatic mode:
FOCUS high airflow, slightly cooler setting
MEDIUM medium airflow, standard setting
DIFFUS El ow airflow, slightly warmer and
draft-free setting
X
Turn the SmartKey to position 2 in the igni-
tion lock ( Y
page 165).X
Press the X button.X
Press the

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 vehi-
cle will then be recirculated.
If you switch on air-recirculation mode, the
windows can fog up more quickly, in particu-
lar at low temperatures. Only use air-recircu-
lation mode briefly to prevent the windows
from fogging up.
Activating or deactivating
X
Turn the SmartKey to position 2 in the igni-
tion lock ( Y
page 165).X
To activate: press the

G WARNING
Unsuitable footwear can hinder correct usage
of the pedals, e.g.: R
shoes with thick soles R
shoes with high heels R
slippers
There is a risk of an accident.
Wear suitable footwear to ensure correct
usage of the pedals.
G WARNING
If you switch off the ignition while driving,
safety-relevant functions are only available
with limitations, or not at all. This could affect,
for example, the power steering and the brake
boosting effect. You will require considerably
more effort to steer and brake. There is a risk
of an accident.
Do not switch off the ignition while driving.
G WARNING
If the parking brake has not been fully
released when driving, the parking brake can: R
overheat and cause a fire R
lose its hold function.
There is a risk of fire and an accident. Release
the parking brake fully before driving off.
! Do not warm up the engine with the vehi-
cle stationary. Drive off immediately. Avoid
high engine speeds and driving at full throt-
tle until the engine has reached its operat-
ing temperature.
Only shift the automatic transmission to
the desired drive position when the vehicle
is stationary.
Where possible, avoid spinning the drive
wheels when pulling away on slippery
roads. You could otherwise damage the
drive train.
! Mercedes-AMG vehicles: at low engine
oil temperatures below 68 ‡ (+20 †), the
maximum engine speed is restricted in
order to protect the engine. To protect the engine and maintain smooth engine oper-
ation, avoid driving at full throttle when the
engine is cold.
SmartKey positions
SmartKey
Z
To remove the SmartKey G
Power supply for some consumers, such
as the windshield wipers H
Ignition (power supply for all consumers)
and drive position I
To start the engine
i The SmartKey can be turned in the igni-
tion lock even if it is not the correct Smart-
Key for the vehicle. The ignition is not
switched on. The engine cannot be started.
KEYLESS-GO
General notes
Vehicles with KEYLESS-GO are equipped with
a SmartKey featuring an integrated KEYLESS-
GO function and a detachable Start/Stop but-
ton.
A check which periodically establishes a radio
connection between the vehicle and the
SmartKey determines whether a valid Smart-
Key is in the vehicle. This occurs, for example,
when starting the engine.
When you insert the Start/Stop button into
the ignition lock, the system needs approx-
imately two seconds recognition time. You
can then use the Start/Stop button. Driving 165
Driving and parking Z

Pressing the Start/Stop button several times
in succession corresponds to the different
key positions in the ignition lock. This is only
the case if you are not depressing the brake
pedal.
If you depress the brake pedal and press the
Start/Stop button, the engine starts immedi-
ately.
To start the vehicle without actively using the
SmartKey: R
the Start/Stop button must be inserted in
the ignition lock. R
the SmartKey must be in the vehicle. R
the vehicle must not be locked with the
SmartKey or KEYLESS-GO ( Y
page 83).
Do not keep the SmartKey: R
with electronic devices, e.g. a mobile
phone or another SmartKey. R
with metallic objects, e.g. coins or metal
foil. R
inside metallic objects, e.g. a metal case.
This can impair the functionality of the KEY-
LESS-GO key.
Do not keep the KEYLESS-GO key in the tem-
perature-controlled cup holder ( Y
page 349).
Otherwise, the KEYLESS-GO key will not be
recognized.
If you lock the vehicle with the SmartKey's
remote control or with KEYLESS-GO, after a
short time: R
you will not be able to switch on the ignition
with the Start/Stop button. R
you will not be able to start the engine with
the Start/Stop button until the vehicle is
unlocked again.
If you lock the vehicle centrally using the but-
ton on the front door ( Y
page 91), you can
continue to start the engine with the Start/
Stop button.
The engine can be switched off while the vehi-
cle is in motion by pressing and holding the
Start/Stop button for three seconds. This
function operates independently of the ECO start/stop automatic engine switch-off func-
tion.
Key positions with KEYLESS-GO
C
Start/Stop button D
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 326).
If Start/Stop button C has not yet been
pressed, this corresponds to the key being
removed from the ignition. X
To switch on the power supply: press
Start/Stop button C once.
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 button C twice when
in this position X
To switch on the ignition: press Start/
Stop button C twice.
The ignition is switched on.
If you press Start/Stop button C once
when in this position, the ignition is deac-
tivated again.
Removing the Start/Stop button
You can remove the Start/Stop button from
the ignition lock and start the vehicle as nor-
mal using the SmartKey.166
Driving
Driving and parking

It is only possible to switch between KEY-
LESS-GO mode and SmartKey operation
when the transmission is in position P .X
Remove Start/Stop button C from ignition
lock D .
You do not have to remove the Start/Stop
button from the ignition lock when you leave
the vehicle. You should, however, always take
the SmartKey with you when leaving the vehi-
cle. 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 PR
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 WARNING
Combustion engines emit poisonous exhaust
gases such as carbon monoxide. Inhaling
these exhaust gases leads to poisoning. There
is a risk of fatal injury. Therefore never leave the engine running in enclosed spaces with-
out sufficient ventilation.
G WARNING
Flammable materials introduced through
environmental influence or by animals can
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.
! Do not depress the accelerator when
starting the engine.
General notes Vehicles with a gasoline engine: the cata-
lytic converter is preheated for up 30 seconds
after a cold start. The sound of the engine may
change during this time.
Automatic transmission X
Shift the transmission to position P
( Y
page 174).
The transmission position display in the
multifunction display shows
P ( Y
page 174).
i You can start the engine in transmission
position P and N .
Starting procedure with the SmartKey X
To start a diesel engine : turn the Smart-
Key to position 2 in the ignition lock
( Y
page 165).
The \( preglow indicator lamp in the
instrument cluster lights up. X
Turn the SmartKey to position 3 in the igni-
tion lock and release it as soon as the
engine is running ( Y
page 165).
i Vehicles with a diesel engine: you can
start the engine without preglow if the
engine is warm. Driving 167
Driving and parking Z

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 independ-
ently 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 165).
Vehicles with a gasoline engine: the
engine starts.
Vehicles with a diesel engine: preglow is
activated and the engine starts.
Pulling away
General notes
G WARNING
If the engine speed is above the idling speed
and you engage transmission position D or R ,
the vehicle could pull away suddenly. There is
a risk of an accident.
When engaging transmission position D or R ,
always firmly depress the brake pedal and do
not simultaneously accelerate.
Depress the accelerator carefully when pull-
ing away.
The vehicle locks centrally once you have
pulled away. The locking knobs in the doors
drop down.
You can open the doors from the inside at any
time.
You can also deactivate the automatic locking
feature ( Y
page 285).
It is only possible to shift the transmission
from position P to the desired position if you
depress the brake pedal. Only then is the
parking lock released. If you do not depress
the brake pedal, the DIRECT SELECT lever can still be moved but the parking lock remains
engaged.
i Upshifts take place at higher engine
speeds after a cold start. This helps the
catalytic converter to reach its operating
temperature more quickly.
Information on the automatic release of the
electric parking brake ( Y
page 190).
Pulling away with a trailer
To ensure that you do not roll backwards
when pulling away on an uphill slope, engage
the electric parking brake. X
Press and hold handle C .
The electric parking brake continues to
brake and prevent the vehicle from rolling
backwards.
The red I (USA only) or $ (Canada
only) indicator lamp in the instrument clus-
ter remains on. X
Depress the accelerator pedal. X
As soon as the vehicle/trailer combination
is held by the driving force of the engine,
release lever C .
The electric parking brake is released.
The red I (USA only) or $ (Canada
only) indicator lamp in the instrument clus-
ter goes out.
Hill start assist
Hill start assist helps you when pulling away
forwards or in reverse on an uphill gradient. It
holds the vehicle for a short time after you168
Driving
Driving and parking