2019 MERCEDES-BENZ GLS SUV roof

If somebody becomes trapped:
R release the switch immediately, or
R during automatic operation, push the
switch briefly in any direction
The opening or closing procedure will be stop-
ped. G
WARNING
If children operate the sliding sunroof they
could become trapped, particularly if they are left unsupervised. There is a risk of injury.
When leaving the vehicle, always take the
SmartKey with you and lock the vehicle. Never
leave children unsupervised in the vehicle.
! Only open the sliding sunroof if it is free of
snow and ice. Otherwise, malfunctions may
occur.
Do not allow anything to protrude from the
sliding sunroof. Otherwise, the seals could be
damaged.
! The weather can change abruptly. It could
start to rain or snow. Make sure that the slid- ing sunroof is closed when you leave the vehi-cle. The vehicle electronics can be damaged ifwater enters the vehicle interior.
Resonance noises can occur in addition to the
usual airflow noises when the sliding sunroof is
open. They are caused by minor pressure fluc-
tuations in the vehicle interior. Change the posi-
tion of the sliding sunroof or open a side win-
dow. The noise will be reduced or eliminated. Sliding sunroof reversing feature
Your vehicle may be equipped with a sliding
sunroof or a panorama roof with power tilt/slid- ing panel. In the following section, the term
"sliding sunroof" refers to both sliding sunroof
variants.
The sliding sunroof is equipped with an auto-
matic reversing feature. If a solid object blocks
or restricts the sliding sunroof during the closing process, the sliding sunroof opens again auto-
matically. However, the automatic reversing
feature is only an aid and does not relieve you of the responsibility of paying attention when clos-ing the sliding sunroof. G
WARNING
The reversing feature does not react:
R to soft, light and thin objects, e.g. small fin-
gers
R over the last 1/6 in (4 mm) of the closing
movement
R during resetting
R when closing the sliding sunroof again man-
ually immediately after automatic reversing
This means that the reversing feature cannot
prevent someone being trapped in these sit-
uations. There is a risk of injury.
Make sure that no body parts are in close
proximity during the closing procedure.
If somebody becomes trapped:
R release the switch immediately, or
R press the switch in any direction during the
automatic closing process
The closing process is stopped. Operating the sliding sunroof
Opening and closing 0043
To raise
0044 To open
0087 To close/lower
X Turn the SmartKey to position 0047or0048 in the
ignition lock.
X Press or pull the 0056switch in the corre-
sponding direction.
If you press the 0056switch beyond the pres-
sure point, an automatic opening/closing proc- ess is started in the corresponding direction. Sliding sunroof
93Opening and closing Z

You can stop automatic operation by pressing/
pulling the switch again.
When opening and raising the roof, automatic
operation is only available if the sliding sunroof
is in the closed position.
The sun protection cover automatically opens
along with the sliding sunroof. You can open or
close the sun protection cover manually when
the sliding sunroof is raised or closed.
You can continue to operate the sliding sunroof
after switching off the engine or removing the
SmartKey from the ignition lock. This function is available for up to five minutes or until the driv-
er's or front-passenger door is opened.
Resetting !
If the sliding sunroof still cannot be opened
or closed fully after resetting, contact a quali- fied specialist workshop.
Reset the sliding sunroof if it does not move
smoothly.
X Turn the SmartKey to position 0047or0048 in the
ignition lock.
X Raise the sliding sunroof fully at the rear
(Y page 93).
X Keep the 0056switch pressed for another
second.
X Make sure that the sliding sunroof can be fully
opened and closed again (Y page 93).
X If this is not the case, repeat the steps above. Operating the panorama roof with
power tilt/sliding panel
Opening and closing 0043
To raise
0044 To open
0087 To close/lower
The panorama roof with power tilt/sliding panel can only be opened when the roller sunblind is
open.
X Turn the SmartKey to position 0047or0048 in the
ignition lock.
X Press or pull the 0056switch in the corre-
sponding direction.
If you press/pull the 0056switch beyond the
pressure point, automatic operation is started in the corresponding direction. You can stop auto-
matic operation by pressing/pulling the switch
again.
The automatic raising feature is available only
when the panorama roof with power tilt/sliding panel is closed. Operating the roller sunblinds for the
panorama roof with power tilt/sliding
panel
Important safety notes G
WARNING
Parts of the body could become trapped
between the roller sunblind and frame or slid- ing sunroof during automatic opening or clos-
ing. There is a risk of injury.
When opening or closing, make sure that no
body parts are in the sweep of the roller sun- blind. 94
Sliding sunroofOpening and closing

If somebody becomes trapped:
R release the switch immediately, or
R during automatic operation, push the
switch briefly in any direction
The opening or closing procedure will be stop-
ped.
The roller sunblinds shield the vehicle interior
from sunlight. The roller sunblinds can only be
opened and closed together when the pano-
rama roof with power tilt/sliding panel is closed.
Roller sunblind reversing feature The roller sunblinds are equipped with an auto-
matic reversing feature. If a solid object blocks
or restricts a roller sunblind during the closing
process, the roller sunblind opens again auto-
matically. However, the automatic reversing
feature is only an aid and is not a substitute of
your attentiveness when closing the roller sun-
blind. G
WARNING
The reversing feature does not react in par-
ticular to soft, light and thin objects, e.g. small fingers. This means that the reversing featurecannot prevent someone being trapped in
these situations. There is a risk of injury.
When closing the roller sunblind, make sure
that no body parts are in the sweep area.
If somebody becomes trapped:
R release the switch immediately, or
R press the switch in any direction during the
automatic closing process
The closing process is stopped. Opening and closing the roller sun-
blinds 0043
Opens
0044 Opens
0087 Closes
X Turn the SmartKey to position 0047or0048 in the
ignition lock.
X Press or pull the 0056switch in the corre-
sponding direction.
If you press the 0056switch beyond the pres-
sure point, an automatic opening/closing proc- ess is started in the corresponding direction.
You can stop automatic operation by pressing/
pulling the switch again.
Resetting the panorama roof with
power tilt/sliding panel and the roller
sunblinds !
If the panorama roof with power tilt/sliding
panel and the roller sunblinds cannot be fully
opened or closed after resetting, contact a
qualified specialist workshop.
Reset the panorama roof with power tilt/sliding panel and the roller sunblinds if the panorama
roof with power tilt/sliding panel or the roller
sunblinds do not move smoothly.
X Turn the SmartKey to position 0047or0048 in the
ignition lock.
X Pull the 0056switch repeatedly to the point of
resistance in the direction of arrow 0087until
the panorama roof with power tilt/sliding
panel is fully closed.
X Keep the 0056switch pulled for an additional
second.
X Pull the 0056switch repeatedly to the point of
resistance in the direction of arrow 0087until
the roller sunblinds are fully closed. Sliding sunroof
95Opening and closing Z

X
Keep the 0056switch pulled for an additional
second. X
Make sure that the panorama roof with power
tilt/sliding panel and the roller sunblinds can be fully opened again.
X If this is not the case, repeat the steps above. Problems with the sliding sunroof
Your vehicle may be equipped with a sliding sunroof or a panorama roof with power tilt/sliding
panel. In the following section, the term "sliding sunroof" refers to both sliding sunroof variants. G
WARNING
If you close the sliding sunroof again immediately after it has been blocked or reset, the sliding
sunroof closes with increased or maximum force. The reversing feature is then not active. Parts of the body could be trapped in the closing area in the process. This poses an increased risk of
injury or even fatal injury.
Make sure that no parts of the body are in the closing area.
If somebody becomes trapped:
R release the switch immediately, or
R press the switch in any direction during the automatic closing process
The closing process is stopped.
! If the sliding sunroof still cannot be opened or closed as a result of a malfunction, contact a
qualified specialist workshop. Problem
Possible causes/consequences and
0050 0050Solutions The sliding sunroof can-
not be closed and you
cannot see the cause. If the sliding sunroof is obstructed during closing and reopens again
slightly:
X Immediately after the sliding sunroof blocks, pull the 0056switch in
the overhead control panel down to the point of resistance and hold it until the sliding sunroof is closed.
The sliding sunroof is closed with increased force.
If the sliding sunroof is obstructed again during closing and then
reopens slightly:
X Immediately after the sliding sunroof blocks, pull the 0056switch in
the overhead control panel down to the point of resistance and hold it until the sliding sunroof is closed.
The sliding sunroof is closed without the automatic reversing fea-
ture. 96
Sliding sunroofOpening and closing

The system automatically switches down from
level 2to level 1after approximately ten
minutes.
The system automatically switches off approx-
imately 35 minutes after it is set to level 1.
X Turn the SmartKey to position 0047or0048 in the
ignition lock (Y page 140).
X To switch on: press button0043repeatedly
until the desired heating level is set.
X To switch off: press button0043repeatedly
until all the indicator lamps go out.
i If the battery voltage is too low, the seat
heating may switch off.
Activating/deactivating seat ventila-
tion The three blue indicator lamps in the buttons
indicate the blower setting you have selected.
X Turn the SmartKey to position 0047or0048 in the
ignition lock (Y page 140).
X To switch on: press button0043repeatedly
until the desired blower setting is set.
X To switch off: press button0043repeatedly
until all the indicator lamps go out.
i If the battery voltage is too low, the seat
ventilation may switch off.
i You can open the side windows and the slid-
ing sunroof using the "Convenience opening" feature (Y page 90). The seat ventilation of
the driver's seat automatically switches to the
highest level.
Problems with the seat heating or seat ventilation Problem
Possible causes/consequences and
0050 0050Solutions The seat heating or seat
ventilation has switched
off prematurely or can-
not be switched on. The on-board voltage is too low because too many electrical consum-
ers are switched on.
X Switch off electrical consumers that you do not need, such as the
rear window defroster or interior lighting.
Once the battery is sufficiently charged, the seat heating or seat
ventilation will switch back on automatically. Seats
107Seats, steering wheel and mirrors Z

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.
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 005D
(Y page 148).
The transmission position indicator on the
multifunction display shows 005D
(Y page 149).
i You can start the engine in transmission
position 005Dand 005C.
Starting procedure with the SmartKey X
Turn the SmartKey to position 0049in the igni-
tion lock (Y page 140) and release it as soon
as the engine is running.
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).
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 005Dis selected
R 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 has been sufficiently
charged G
WARNING
Limbs could be crushed or trapped if the
engine is started unintentionally during ser-
vice or maintenance work. There is a risk of
injury.
Always secure the engine against uninten-
tional starting before carrying out mainte-
nance or repair work. 142
DrivingDriving and parking

Driving tips
General notes
Important safety notes 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 you operate mobile communication equip-
ment when driving, you may be distracted
from the traffic situation. You could also lose
control of the vehicle. There is a risk of an
accident.
Only operate this equipment when the vehicle is stationary.
Observe the legal requirements for the country
in which you are driving. Some jurisdictions pro-
hibit the driver from using a mobile phone while driving a vehicle.
If you make a call while driving, always use
hands-free mode. Only operate the telephone
when the traffic situation permits. If you are
unsure, pull over to a safe location and stop
before operating the telephone.
Bear in mind that at a speed of only 30 mph
(approximately 50 km/h), the vehicle covers a
distance of 44 ft (approximately 14 m)per sec-
ond.
Drive sensibly – save fuel Observe the following tips to save fuel:
X The tires should always be inflated to the rec-
ommended tire pressure.
X Remove unnecessary loads.
X Remove roof carriers when they are not nee-
ded.
X Warm up the engine at low engine speeds. X
Avoid frequent acceleration or braking.
X Have all service and maintenance work car-
ried out at the specified intervals.
Fuel consumption also increases when driving in
cold weather, in stop-start traffic and in hilly ter- rain.
Drinking and driving G
WARNING
Drinking and driving and/or taking drugs and driving are very dangerous combinations.
Even a small amount of alcohol or drugs can
affect your reflexes, perceptions and judg-
ment.
The possibility of a serious or even fatal acci-
dent is greatly increased when you drink or
take drugs and drive.
Do not drink or take drugs and drive or allow
anyone to drive who has been drinking or tak-
ing drugs.
Emission control G
DANGER
Combustion engines emit poisonous exhaust
gases such as carbon monoxide. Inhaling
these exhaust gases is hazardous to health
and can result in poisoning. There is a risk of
fatal injury. Therefore, never leave the engine running an enclosed space without adequate
ventilation.
Certain engine systems are designed to keep
the level of poisonous components in exhaust
fumes within legal limits.
These systems only work at peak efficiency if
they are serviced exactly in accordance with the manufacturer's specifications. Always have
work on the engine carried out at a qualified
specialist workshop. Mercedes-Benz recom-
mends that you use an authorized Mercedes-
Benz Center for this purpose. In particular, work
relevant to safety or on safety-related systems
must be carried out at a qualified specialist
workshop.
The engine settings must not be changed under
any circumstances. Furthermore, all specific
service work must be carried out at regular Driving tips
161Driving and parking Z

such as carbon monoxide (CO) may enter the
vehicle. This is the case, e.g. if the vehicle
becomes trapped in snow. There is a risk of
fatal injury.
If you leave the engine or the auxiliary heating
running, make sure the exhaust pipe and area
around the vehicle are clear of snow. To
ensure an adequate supply of fresh air, open a window on the side of the vehicle that is not
facing into the wind.
! When scraping ice off the rear window, take
care not to damage the rear-window seal or
trim.
Have your vehicle winter-proofed at a qualified
specialist workshop at the onset of winter.
Drive particularly carefully on slippery road sur- faces. Avoid sudden acceleration, steering and
braking maneuvers. Do not use cruise control or
Active Distance Assist DISTRONIC.
If the vehicle threatens to skid or cannot be
stopped when moving at low speed:
X Shift the transmission to position 005C.
X Try to bring the vehicle under control using
corrective steering.
When driving in snow with or without snow
chains, select driving program Slippery
(Y page 147).
The outside temperature indicator is not
designed to serve as an ice-warning device and
is therefore unsuitable for that purpose.
Changes in the outside temperature are dis-
played after a short delay.
Indicated temperatures just above the freezing
point do not guarantee that the road surface is
free of ice. The road may still be icy, especially in wooded areas or on bridges. You should pay
special attention to road conditions when tem-
peratures are around the freezing point.
For more information on driving with snow
chains, see (Y page 354).
For more information on driving with summer
tires, see (Y page 354).
Observe the notes in the "Changing a wheel"
section (Y page 372). Off-road driving
Important safety notes G
WARNING
If you drive on a steep incline at an angle or
turn when driving on an incline, the vehicle
could slip sideways, tip and rollover. There is a risk of an accident.
Always drive on a steep incline in the line of
fall (straight up or down) and do not turn the
vehicle. G
WARNING
Flammable material such as leaves, grass or
twigs may ignite if they come into contact with hot parts of the exhaust system. There is a risk of fire.
When driving on an unpaved road or off-road,
check the vehicle underside regularly. In par-
ticular, remove trapped plant parts or other
flammable material. Contact a qualified spe-
cialist workshop immediately if damage is
detected. G
WARNING
If the vehicle level is high, the vehicle center of gravity is raised. This could cause the vehicleto tip over more easily on uphill or downhill
gradients. There is a risk of an accident.
Select the lowest possible vehicle level.
! There is a risk of damage to the vehicle if:
R the vehicle becomes stuck, e.g. on a high
curb or an unpaved road
R you drive too fast over an obstacle, e.g. a
curb, a speed bump or a pothole in the road
R a heavy object strikes the underbody or
parts of the chassis
In situations like this, the body, the under-
body, chassis parts, wheels or tires could be
damaged without the damage being visible.
Components damaged in this way can unex-
pectedly fail or, in the case of an accident, no
longer withstand the loads they are designed
to.
If the underbody paneling is damaged, com-
bustible materials such as leaves, grass or 166
Driving tipsDriving and parking