2016 MERCEDES-BENZ GLS SUV fuel

Switch the auxiliary heating on regularly once a
month for about ten minutes.
The auxiliary heating heats the air in the vehicle interior to the set temperature. This occurs with-out using the heat of the running engine. The
auxiliary heating is operated directly using the
vehicle's fuel. For this reason, the tank content
must be at least at reserve fuel level to ensure
that the auxiliary heating functions.
The auxiliary heating or auxiliary ventilation
automatically adjusts to changes in tempera-
ture and weather conditions. For this reason,
the auxiliary heating could switch from ventila-
tion mode to heating mode or from heating
mode to ventilation mode.
The auxiliary heating switches off when the
engine is switched off. The auxiliary ventilation
switches off when you turn the key to position 2
(Y page 148).
The auxiliary heating switches off automatically
after 50 minutes. This time limit can be altered.
To do this, visit a qualified specialist workshop.
You cannot use the auxiliary ventilation to cool
the vehicle interior to a temperature lower than
the outside temperature.
Before switching on X
Turn the key to position 2in the ignition lock
(Y page 148).
X Set the desired temperature.
The auxiliary heating/ventilation can be activa-
ted even when climate control is set to manual.
Optimum comfort can be attained when the sys-
tem is set to automatic mode. Set the temper-
ature to 22 †.
The auxiliary heating or auxiliary ventilation can
be switched on/off using the button on the
centre console or the remote control.
The on-board computer can be used to specify
up to three departure times, one of which may
be preselected (Y page 253). Switching the auxiliary heating/venti-
lation on or off using the button on the
centre console General notes
The colours of the indicator lamps in button
:
mean the following:
R blue: auxiliary ventilation is switched on
R red: auxiliary heating is activated
R yellow: departure time is preselected
(Y page 253).
Switching on/off X To switch on the auxiliary heating or aux-
iliary ventilation:
press button:.
The red or blue indicator lamp in button :
lights up.
X To switch off the auxiliary heating or aux-
iliary ventilation: press button:.
The red or blue indicator lamp in button :
goes out.
Switching the auxiliary heating/venti-
lation on or off using the remote control General notes
Your vehicle comes with one remote control.
You may use two additional remote controls for
your vehicle. For more information, please con-
tact a qualified specialist workshop.
Store the remote control for the auxiliary heat-
ing so that the auxiliary heating cannot be
switched on unintentionally. In particular,
ensure that the remote control for the auxiliary
heating is kept out of the reach of children. Operating the climate control system
141Climate control Z

X
Insert new battery =with the lettering facing
upwards.
X Slide battery cover ;in the opposite direc-
tion to the arrow on the remote control until it engages.
Problems with the auxiliary heating/ventilation Problem
Possible causes/consequences and
M
MSolutions FAIL¨ The signal transmission between the transmitter and the vehicle is
faulty.
X
Change your position in relation to the vehicle, moving closer if
necessary. FAIL The auxiliary heating/ventilation cannot be switched on or has
switched itself off.
The starter battery is not sufficiently charged.
X Charge the starter battery. The fuel tank content is below the reserve fuel level.
X Refuel at the nearest filling station. The auxiliary heating/ventilation is malfunctioning.
X Have the auxiliary heating/ventilation checked at a qualified spe-
cialist workshop. Adjusting 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 bonnet and in
the engine compartment on the front-
passenger side free of blockages, such as ice,
snow or leaves.
R never cover the vents or ventilation grilles in
the vehicle interior i
For virtually draught-free ventilation, adjust
the sliders of the air vents to the centre posi- tion. Adjusting the centre air vents
:
Centre air vent, left
; Centre air vent, right
= Centre vent thumbwheel, right
? Centre vent thumbwheel, left 144
Adjusting the air ventsClimate control

Pulling away with a trailer
To ensure that you do not roll backwards when
pulling away on an uphill slope, apply the electric parking brake.
X Press and hold handle :.
The electric parking brake continues to brake
and prevent the vehicle from rolling back-
wards.
The red !indicator lamp in the instrument
cluster remains lit.
X Depress the accelerator pedal.
X As soon as the vehicle/trailer combination is
held by the driving force of the engine, release
lever :.
the electric parking brake is released
The red !indicator lamp in the instrument
cluster goes out.
Hill start assist Hill start assist helps you when pulling away for-
wards or in reverse on an uphill gradient. It holds the vehicle for a short time after you have
removed your foot from the brake pedal. This
gives you enough time to move your foot from
the brake pedal to the accelerator pedal and
depress it before the vehicle begins to roll. G
WARNING
After a while, hill start assist no longer holds
the vehicle and it may roll away. There is a risk of an accident and injury.
Therefore, quickly move your foot from the
brake pedal to the accelerator pedal. Never
leave the vehicle when it is held by hill start
assist. Hill start assist is not active if:
R you are pulling away on a level road or a
downhill gradient
R the transmission is in position N
R the electric parking brake is applied
R ESP ®
is malfunctioning ECO start/stop function
Introduction The ECO start/stop function switches the
engine off automatically if the vehicle is stopped
under certain conditions.
When pulling away again, the engine starts auto-
matically. The ECO start/stop function thereby
helps you to reduce the fuel consumption and
emissions of your vehicle.
Important safety notes G
WARNING
If the engine is switched off automatically and you exit the vehicle, the engine is restarted
automatically. The vehicle may begin moving. There is a risk of accident and injury.
If you wish to exit the vehicle, always turn off
the ignition and secure the vehicle against
rolling away.
General notes :
ECO start/stop display
The ECO start/stop function is activated when-
ever you start the engine using the key or the
Start/Stop button.
If the è ECO symbol is shown on the multi-
function display, the ECO start/stop function
switches the engine off automatically if the vehi- cle stops moving.
If the ECO start/stop function has been man-
ually deactivated (Y page 153) or a malfunction Driving
151Driving and parking Z

Problems with the engine
Problem
Possible causes/consequences and
M
MSolutions The engine does not
start. The starter motor
can be heard. R
There is a malfunction in the engine electronics.
R There is a malfunction in the fuel supply.
Before attempting to start the engine again:
X Turn the key back to position 0in the ignition lock.
or X Press the Start/Stop button repeatedly until all indicator lamps in
the instrument cluster go out.
X Try to start the engine again (Y page 149). Avoid excessively long
and frequent attempts to start the engine, as this will drain the
battery.
If the engine does not start after several attempts:
X Consult a qualified specialist workshop. The engine does not
start. The starter motor
can be heard. The
reserve fuel warning
lamp is lit and the fuel
gauge display shows
0. The fuel tank is empty.
X Refuel the vehicle. The engine does not
start. You cannot hear
the starter motor. The on-board voltage is too low because the battery is too weak or
discharged.
X Jump-start the vehicle (Y page 354).
If the engine does not start despite attempts to jump-start it:
X Consult a qualified specialist workshop. The starter motor was exposed to a thermal load that was too high.
X Allow the starter motor to cool down for approximately two minutes.
X Try to start the engine again.
If the engine still does not start: X Consult a qualified specialist workshop. Vehicles with a petrol
engine:
The engine is not running
smoothly and is misfir-
ing. There is a malfunction in the engine electronics or in a mechanical
component of the engine management system.
X Only depress the accelerator pedal slightly.
Otherwise, non-combusted fuel may get into the catalytic converter
and damage it.
X Have the cause rectified immediately at a qualified specialist work-
shop. 154
DrivingDriving and parking

Driving tips
Changing gear The automatic transmission shifts to the indi-
vidual gears automatically when it is in trans-
mission position
D. Gearshifting is determined
by:
R the selected drive program
R the position of the accelerator pedal
R the road speed
Accelerator pedal position Your driving style influences how the automatic
transmission shifts gear:
R little throttle: early upshifts
R more throttle: late upshifts
Kickdown Use kickdown for maximum acceleration:
X Depress the accelerator pedal beyond the
pressure point.
The automatic transmission shifts to a lower
gear depending on the engine speed.
X Ease off the accelerator pedal once the
desired speed is reached.
The automatic transmission shifts back up.
Gliding mode (diesel engines only) Gliding mode is characterised by the following:
R the combustion engine is disconnected from
the drive train
R the engine speed is equal to the engine idling
speed
R the gear indicated after the transmission
position Ddisappears in the multifunction
display (Y page 158)
Gliding mode can be activated and transmission
position Dshown in green under the following
conditions:
R you select the "ECO" setting for the drive sys-
tem within the Individualdrive program. You
can find information about this in the Digital
Owner's Manual
R the speed is within a suitable range
R the type of road is suitable, e.g. no steep uphill
or downhill gradients R
the distance to the vehicle in front is sufficient
R you are no longer depressing the accelerator
pedal
Gliding mode is deactivated under the following
conditions:
R you depress the accelerator pedal
R you depress the brake pedal
R you use the DIRECT SELECT lever to switch
the transmission position (Y page 156)
R you use the DYNAMIC SELECT controller to
change the drive program (Y page 155)
R you activate manual gearshifting
(Y page 160)
R the distance to the vehicle in front is too short
R you leave the suitable speed range
Towing a trailer X
Drive in the middle of the engine speed range
on uphill gradients.
X Depending on the uphill or downhill gradient,
use the left-hand steering wheel gearshift
paddle (Y page 160) to select a lower gear,
even if cruise control, Distance Pilot
DISTRONIC or the speed limiter are activated. Drive programs
Slippery drive program The
Slippery drive program has the following
characteristics:
R reduced engine and transmission settings for
optimum propulsion on slippery or snow-cov-
ered roads.
R optimised ESP ®
stability control on slippery
or snow-covered roads.
R the vehicle has improved driving stability on
slippery or snow-covered roads, for example.
Comfort drive program The
Comfort drive program has the following
characteristics:
R comfort-orientated engine and transmission
settings.
R optimal fuel consumption resulting from the
automatic transmission shifting up sooner. Automatic transmission
159Driving and parking Z

R
the vehicle pulling away more gently in
forward and reverse gears unless the accel-
erator pedal is depressed fully.
R the automatic transmission shifting up
sooner. This results in the vehicle being driven
at lower engine speeds and the wheels being less likely to spin.
Sport drive program The
Sport drive program has the following char-
acteristics:
R sporty engine and transmission settings.
R the automatic transmission shifting up later.
As a result of the later automatic transmission
shift points, the fuel consumption possibly
being higher.
R the suspension exhibits sporty damping (vehi-
cles with AIRMATIC).
Drive program Sport Plus (Mercedes-
AMG vehicles) The
Sport Plus drive program has the following
characteristics:
R the vehicle exhibits particularly sporty driving
characteristics.
R the vehicle pulling away in first gear.
R the automatic transmission shifting up later.
As a result of the later automatic transmission
shift points, the fuel consumption possibly
being higher.
R the suspension exhibits particularly firm
springing and damping settings (vehicles with
AIRMATIC).
R the ECO start/stop function is deactivated, it
can, however, be activated again using the
ECO button (Y page 153).
Individual drive program In the
Individual drive program, the following
properties of the drive program can be selected:
R the drive (engine and transmission manage-
ment)
R the transmission
R the suspension
R all vehicles (except Mercedes-AMG vehicles):
the steering
R all vehicles (except Mercedes-AMG vehicles):
availability of the ECO start/stop function To select the gears in the
Individualdrive pro-
gram permanently using the steering wheel pad- dles, select the permanent manual gearshift
program.
Information about configuring the Individual
drive program with the multimedia system can
be found in the Digital Owner's Manual. Manual gearshifting
General notes You can shift gears yourself using the steering
wheel gearshift paddles. The transmission must
be in position Dto do this.
Depending on which steering wheel gearshift
paddle is pulled, the automatic transmission
immediately shifts into the next gear up or
down, if permitted.
To use manual shifting, you have two options:
R temporary setting
R permanent setting
If you activate manual gearshifting, the multi-
function display will show the current gear
instead of transmission position D.
If manual gearshifting is deactivated, the gears
will be selected automatically.
Temporary setting X
To activate: shift the DIRECT SELECT lever to
position D.
X Pull steering wheel gearshift paddle :or;.
The temporary setting will remain active for a
certain amount of time. Under certain condi-
tions, the minimum amount of time is extended, e.g. in the case of lateral acceleration, during an overrun phase or when driving on steep terrain. 160
Automatic transmissionDriving an
d parking

X
To deactivate: pull steering wheel gearshift
paddle ;and hold it in place.
or X Use the DIRECT SELECT lever to shift the
transmission position.
or X Use the DYNAMIC SELECT controller to
change the drive program.
Permanent setting (all vehicles except
Mercedes-AMG vehicles) X
To activate: shift the DIRECT SELECT lever to
position D.
X Press button :.
X To deactivate: press button:.
or X Use the DYNAMIC SELECT controller to
change the drive program.
Permanent setting (Mercedes-AMG
vehicles) X
To activate: shift the DIRECT SELECT lever to
position D.
X Press button :.
Indicator lamp ;lights up. X
To deactivate: press button:.
or
X Use the DYNAMIC SELECT controller to
switch to the Individualdrive program.
Indicator lamp ;goes out.
Shifting gears !
Mercedes-AMG vehicles:
the automatic
transmission does not shift up automatically
even when the engine limiting speed for the
current gear is reached. When the engine lim- iting speed is reached, the fuel supply is cut to
prevent the engine from overrevving. Always
make sure that the engine speed does not
reach the red area of the rev counter. There is
otherwise a risk of engine damage. X
To shift up: pull steering wheel gearshift pad-
dle ;.
The automatic transmission shifts up to the
next gear.
All vehicles (except Mercedes-AMG vehi-
cles): if the maximum engine speed in the
currently engaged gear is reached and you
continue to accelerate, the automatic trans-
mission automatically shifts up in order to
prevent engine damage.
X To shift down: pull steering wheel gearshift
paddle :.
The automatic transmission shifts down to
the next gear.
Automatic downshifting occurs when coast-
ing.
If the engine exceeds the maximum engine
speed when shifting down, the automatic
transmission protects against engine damage
by not shifting down. Automatic transmission
161Driving and parking Z

Gearshift recommendation
The gearshift recommendation assists you in
adopting a fuel-efficient driving style. The rec-
ommended gear is shown on the multifunction
display.
X When the gearshift recommendation :is
shown on the multifunction display of the
instrument cluster, shift to recommended
gear ;.
Upshifting (Mercedes-AMG vehicles) !
The automatic transmission does not shift
up automatically even when the engine limit-
ing speed for the current gear is reached.
When the engine limiting speed is reached,
the fuel supply is cut to prevent the engine
from overrevving. Always make sure that the
engine speed does not reach the red area of
the rev counter. There is otherwise a risk of
engine damage. :
Gear indicator
; Upshift indicator Before the engine speed reaches the red area,
an upshift indicator will be shown on the multi-
function display.
X When the UP
UP message appears in the multi-
function display, pull on the right-hand steer- ing wheel gearshift paddle.
Kickdown Mercedes-AMG vehicles:
kickdown is possible
only in the temporary setting.
X For maximum acceleration, depress the
accelerator pedal beyond the pressure point. The automatic transmission shifts to a lower
gear depending on the engine speed.
X Shift back up once the desired speed is
reached.
During kickdown, you cannot shift gears using
the steering wheel gearshift paddles.
If you apply full throttle, the automatic trans-
mission shifts up to the next gear when the
maximum engine speed is reached. This pre-
vents the engine from overrevving. 162
Automatic transmissionDriving and parking