2016 MERCEDES-BENZ GLS SUV heating

Display messages
Possible causes/consequences and
M
MSolutions j
Check Check
trailer
trailer hitch
hitch
lock
lock The trailer tow hitch is not operational.
A warning tone also sounds.
G WARNING
If the ball coupling is not in the locked position, the trailer may come
loose. There is a risk of an accident.
X Stop the vehicle immediately, paying attention to road and traffic
conditions, and switch off the engine.
X Secure the vehicle against rolling away (Y page 168).
X Uncouple the trailer and secure it against rolling away.
X Initiate a new swivelling procedure (Y page 235).
X When the display message disappears, re-couple the trailer.
If the display message continues to be displayed: X Do not re-couple the trailer.
X Check the ground clearance and continue driving without the
trailer.
X Consult a qualified specialist workshop. j
Trailer coupling Trailer coupling
extending extending The ball coupling is swivelled out or in.
Only swivel the ball coupling in or out when the vehicle is stationary.
No trailer may be coupled during the swivelling procedure. Do not
attempt to speed up, slow down or initiate the swivelling process using your hand, foot or other aids.
X Move the ball coupling of the trailer tow hitch to an operational
position (Y page 235). &
inoperative inoperative
Battery
Battery
low
low The on-board voltage is too low.
The auxiliary heating has switched itself off or cannot be switched on
(Y page 140).
X Drive for a considerable distance.
The battery charges. The auxiliary heating is operational again as
soon as the on-board electrical system voltage is sufficient. &
inoperative Refuel inoperative Refuel
vehicle vehicle There is too little fuel in the fuel tank. The auxiliary heating cannot be
switched on (Y page 140).
X Refuel at the nearest filling station. &
inoperative inoperative
See
SeeOwn‐
Own‐
er's Man.
er's Man. The auxiliary heating is temporarily malfunctioning or faulty.
X When the vehicle is on a level surface and the engine has cooled
down, make up to four attempts to switch on the auxiliary heating,
waiting several minutes between each attempt (Y page 140).
If the auxiliary heating does not switch on: X Consult a qualified specialist workshop. 288
Display
messagesOn-board computer and displays

Warning/
indicator
lamp
N N
Signal type
Possible causes/consequences and M
M Solutions !
N
The red indicator lamp for the electric parking brake flashes or is lit and/or the
yellow warning lamp for the electric parking brake is lit.
X Observe the additional display messages in the multifunction display. 6
N
The red restraint system warning lamp is lit while the engine is running.
The restraint system is malfunctioning.
G WARNING
The airbags or belt tensioners may either be triggered unintentionally or, in the
event of an accident, may not be triggered.
This poses an increased risk of injury.
X Observe the additional display messages in the multifunction display.
X Drive on carefully.
X Contact a qualified specialist workshop immediately and have the restraint sys-
tem checked.
Further information about the restraint system (Y page 42).Engine
Warning/
indicator
lamp
N N
Signal type
Possible causes/consequences and M
M Solutions ;
N
The yellow engine diagnostics warning lamp lights up while the engine is run-
ning.
A fault may exist with the following, for example:
R Engine management
R In the fuel injection system
R Exhaust system
R Ignition system (for vehicles with petrol engines)
R Fuel system
The emission limit values may be exceeded and the engine may be running in
emergency mode.
X Consult a qualified specialist workshop immediately.
Vehicles with a diesel engine: the fuel tank has been run dry (Y page 165).
X Start the engine three to four times after refuelling.
If the yellow engine diagnostics warning lamp goes out, emergency running
mode is cancelled. The vehicle does not have to be checked. 8
N
The yellow reserve fuel warning lamp is on while the engine is running.
The fuel level has dropped into the reserve range.
Operation of the auxiliary heating is deactivated if the fuel level drops into the
reserve range.
X Refuel at the nearest filling station. 298
Warning and indicator lamps in the instrument clusterOn-board computer and displays

X
To open: slide cover ;to its foremost posi-
tion.
X To close: pull cover ;back as far as it will go.
You can remove the rubber mat of the cup
holder to clean it. Wash it with clean, lukewarm water only.
Temperature-controlled cup holder in
the front-compartment centre console :
Cup holders
; Residual heat indicator lamp
= Button
The temperature-controlled cup holder can be
used to keep cold drinks cold and hot drinks hot.
X Turn the key to position 2in the ignition lock.
X To switch on the cooling function: press
button =repeatedly until the blue indicator
lamp on the button lights up.
X To switch on the heating function: press
button =repeatedly until the red indicator
lamp on the button lights up.
X To switch off the function: press button=
repeatedly until the indicator lamp on the but-
ton goes out.
When the heating function is used, the metal
insert of the cup holder is heated. Once a certain temperature is reached, residual heat indicator
lamp ;lights up. This means that the metal
insert of the cup holder is hot. For this reason,
you must not reach into the cup holder metal
insert.
Do not use hard or sharp objects to clean the
cup holder. Use only a soft cloth to clean it. Cup holder in the rear seat armrest !
Do not sit on or support your body weight on
the rear seat armrest when it is folded down,
as you could otherwise damage it. X
Fold down the rear seat armrest.
Cup holder :is located in the rear seat arm-
rest.
Cup holder in the third row of seats :
Cup holders
The cup holders are located on the right-hand
and left-hand side panels. Features
321Stowing an d features Z

Ashtray
Front ashtray !
The holder under the ashtray is not heat
resistant. Before placing lit cigarettes in the
ashtray, make sure that the ashtray is prop-
erly engaged. Otherwise, the holder could be
damaged. X
To open: slide cover :to its foremost posi-
tion.
X Fold cover =of the insert upwards.
X To remove the insert: push insert=to the
left ?.
Ashtray insert =slides out slightly to the
right.
X Lift insert =up and out ;.
X To refit the insert: place insert=into the
holder and press it down on the right until it
engages.
X To close: pull cover :back as far as it will go.
Rear-compartment ashtray !
Close the ashtray when it is not in use and
before you fold the rear seats forward. You
can otherwise damage the ashtray. Vehicles without a Rear Seat Entertainment Sys-
tem have an ashtray in the centre console in the rear compartment.
X To open: briefly press the top of cover ;.
The ashtray opens.
X To remove the insert: push into recess=
from the right.
Ashtray insert :slides out slightly to the
right.
X Lift insert :up and out.
X To refit the insert: place insert:into the
holder and press it down on the right until it
engages. Cigarette lighter
G
WARNING
You can burn yourself if you touch the hot
heating element or the socket of the cigarette lighter.
In addition, flammable materials can ignite if:
R the hot cigarette lighter falls
R a child holds the hot cigarette lighter to
objects, for example
There is a risk of fire and injury.
Always hold the cigarette lighter by the knob.
Always make sure that the cigarette lighter is
out of reach of children. Never leave children unattended in the vehicle.
! The cigarette lighter in the centre console in
the front compartment is not intended for
operating the tyre inflation compressor. Your attention must always be focused on the
traffic conditions. Only use the cigarette lighter
when road and traffic conditions permit. Features
323Stowing and featu res Z

X
Turn the key to position 2in the ignition lock
(Y page 148).
X To open: slide cover :to its foremost posi-
tion.
X Press in cigarette lighter ;.
Cigarette lighter ;will pop out automatically
when the heating element is red-hot.
X To close: pull cover :back as far as it will go. 12 V sockets
General notes X
Turn the key to position 1in the ignition lock
(Y page 148).
With the exception of the socket in the front
centre console, all sockets can be used for
accessories with a maximum current draw of
240 W (20 A). The socket in the front centre
console can be used for accessories with a max-
imum current draw of 180 W (15 A). Accessories include such items as mobile phone chargers.
If you use the sockets for long periods when the engine is switched off, the battery may dis-
charge.
i An emergency cut-off ensures that the on-
board voltage does not drop too low. If the on-
board voltage is too low, the power to the
sockets is automatically cut. This ensures
that there is sufficient power to start the
engine.
Socket in the front centre console !
The socket is not intended for operating the
tyre inflation compressor.
X To open: slide the cover to its foremost posi-
tion.
X Lift up the cover of the socket.
X To close: pull the cover back as far as it will
go.
Socket in the rear-compartment centre
console On vehicles with the Rear Seat Entertainment
System, there are two sockets in the rear-com-
partment centre console.
X Lift up the cover of the socket. Socket in the luggage compartment
X
Lift up the cover of socket :. Mercedes-Benz emergency call sys-
tem
Information on these requirements can be found in the separate multimedia system operating
instructions. X
To open: press and hold cover :for at least
one second.
X To make an emergency call: press SOS but-
ton ;briefly.
The indicator lamp in SOS button ;flashes
until the emergency call is concluded.
X Wait for a voice connection to the Mercedes-
Benz emergency call centre.
X After the emergency call, close cover :.
You will see a message if:
R a connection to the Mercedes-Benz emer-
gency call centre cannot be made
R a call has not been automatically forwarded
to the public emergency call centre
In this case, dial the 112emergency number
on your mobile phone. 324
FeaturesStowing and features

Engine compartment
Bonnet
Important safety notes G
WARNING
An unlocked bonnet may open up when the
vehicle is in motion and block your view. There is a risk of an accident.
Never unlock the bonnet when driving. Before
every trip, ensure that the bonnet is locked. G
WARNING
When being opened and closed, the bonnet
may suddenly fall into the closed position.
There is a risk of injury to persons in the range of movement of the bonnet.
Open and close the bonnet only when nobody
is in the range of movement. G
WARNING
If you open the bonnet while the engine is
overheating or while there is a fire in the
engine compartment, you could come into
contact with hot gases or other leaking ser-
vice products. There is a danger of injury.
Allow an overheating engine to cool down
before opening the bonnet. If there is a fire in the engine compartment, leave the bonnet
closed and notify the fire brigade. G
WARNING
There are moving components in the engine
compartment. Certain components may con-
tinue to move or suddenly move again even
after the ignition has been switched off, e.g.
the radiator fan. There is a risk of injury.
If you have to carry out work in the engine
compartment:
R switch off the ignition
R never touch the dangerous areas surround-
ing moving components, e.g. the rotation
area of the fan R
remove jewellery and watches
R keep items of clothing and hair, for exam-
ple, away from moving parts. G
WARNING
The ignition system and the fuel injection sys- tem operate with a high voltage. If you touch
the live components, you could receive an
electric shock. There is a danger of injury.
Never touch components of the ignition sys-
tem or the fuel injection system when the
ignition is switched on.
Active bonnet (pedestrian protection) Operating principle
! An active bonnet that had been triggered
must be repaired at a qualified specialist
workshop. The active bonnet function will
then be available again. The additional pedes- trian protection provided by the active bonnet will then be restored.
i The active bonnet is available only for cer-
tain countries. It is available for all models,
except for the Mercedes-AMG GLS 63.
The active bonnet can reduce the risk of injury to
pedestrians in certain accident situations. Rais- ing the active bonnet increases the clearance tohard components, such as the engine.
If the active bonnet has been triggered, it is
raised at the rear in the area around the hinge byapproximately 100 mm. The active bonnet is
triggered by pyrotechnics.
For the drive to the workshop, reset the trig-
gered active bonnet yourself. After being reset,
the active bonnet rests in the area of the hinges
on the seals, and the hinges do not engage. For this reason, we recommend that you do not
exceed a maximum permissible speed of
130 km/h on the way to the workshop. If the
active bonnet has been triggered, pedestrian
protection may be limited. 332
Engine compartmentMaintenance and care

Displaying service messages
X Switch the ignition on.
X Press the =or; button on the steering
wheel to select the Serv.
Serv.menu.
X Press the 9or: button to select the
ASSYST
ASSYST PLUS
PLUSsubmenu and confirm by press-
ing the abutton.
The service due date appears in the multi-
function display. Information about service
Resetting the ASSYST PLUS service
interval display !
If the ASSYST PLUS service interval display
has been inadvertently reset, this setting can
be corrected at a qualified specialist work-
shop.
Have service work carried out as described in the Service Booklet. This may otherwise lead
to increased wear and damage to the major
assemblies or the vehicle.
A qualified specialist workshop, e.g. a
Mercedes-Benz Service Centre, will reset the
ASSYST PLUS service interval display after the
service work has been carried out. You can also
obtain further information on maintenance
work, for example.
Special service requirements The prescribed service interval is based on nor-
mal operation of the vehicle. Service work will
need to be performed more often if the vehicle is
operated under arduous conditions or increased loads, for example:
R regular city driving with frequent intermediate
stops
R if the vehicle is primarily used to travel short
distances
R for frequent operation in mountainous terrain
or on poor road surfaces
R if the engine is often left idling for long periods
In these or similar operating conditions, have,
for example, the air filter, engine oil and oil filter changed more frequently. The tyres must be
checked more frequently if the vehicle is oper-
ated under increased loads. Further informationcan be obtained at a qualified specialist work-
shop, e.g. a Mercedes-Benz Service Centre. Driving abroad An extensive Mercedes-Benz Service network is
also available in other countries. You can obtain further information from any Mercedes-Benz
Service Centre. Care
General notes
H
Environmental note
Dispose of empty packaging and cleaning
cloths in an environmentally responsible man-
ner.
! For cleaning your vehicle, do not use any of
the following:
R dry, rough or hard cloths
R abrasive cleaning agents
R solvents
R cleaning agents containing solvents
Do not scrub.
Do not touch the surfaces or protective films
with hard objects, e.g. a ring or ice scraper.
You could otherwise scratch or damage the
surfaces and protective film.
! Do not park up your vehicle for a long period
of time immediately after cleaning, particu-
larly after cleaning the wheel rim with wheel
cleaner. Wheel cleaner may lead to increased corrosion of the brake discs and pads. You
should therefore drive for a few minutes after
cleaning. By heating up the brakes, the brake
discs and pads dry. The vehicle can then be
parked up for a long period of time.
Regular care of your vehicle is a condition for
retaining quality in the long term.
Use care products and cleaning agents recom-
mended and approved by Mercedes-Benz. Care
337Maintenance and care Z

Washing the vehicle and cleaning the
paintwork
Automatic car wash G
WARNING
Braking efficiency is reduced after the vehicle has been washed. There is a risk of an acci-
dent.
After washing the vehicle, brake carefully
while paying attention to the traffic conditions in order to restore full braking efficiency.
! Before driving into an automatic car wash,
make sure that it is suitable for the dimen-
sions of the vehicle. In particular, make sure
that:
R there is enough ground clearance between
the vehicle underbody and the guide rails of the automatic car wash.
R the clearance width of the automatic car
wash is sufficient, particularly the width of
the guide rails
R you enter the automatic car wash straight
and in the centre of the guide rails in order
to avoid damaging the tyres or wheel rims.
Fold in the exterior mirrors before the vehicle is washed. The exterior mirrors could other-
wise be damaged.
! When DISTRONIC PLUS or the HOLD func-
tion is activated, the vehicle brakes automat- ically in certain situations.
To avoid damage to the vehicle, deactivate
DISTRONIC PLUS and the HOLD function in
the following or similar situations:
R when towing away
R in a car wash
! Make sure that:
R the side windows and sliding sunroof are
closed completely.
R the blower for the ventilation/heating is
switched off (OFF button is depressed).
R the windscreen wiper switch is at position
0.
The vehicle could otherwise be damaged.
! In car washes with a towing mechanism,
make sure that the automatic transmission is in transmission position N, otherwise the
vehicle could be damaged. R
Vehicles with a key:
do not remove the key from the ignition
lock. Do not open the driver's door or front-
passenger door when the engine is
switched off. Otherwise, the automatic
transmission selects park position Pauto-
matically and locks the wheels. You can
prevent this by shifting the automatic trans- mission to Nbeforehand.
R Vehicles with KEYLESS-GO:
do not open the driver's door or front-
passenger door when the engine is
switched off. Otherwise, the automatic
transmission selects park position Pauto-
matically and locks the wheels.
Observe the following to make sure that the
automatic transmission stays in position N:
X Make sure the vehicle is stationary and the
ignition is switched off.
X Turn the key to position 2in the ignition lock
(Y page 148).
Use the key instead of the Start/Stop button on vehicles with KEYLESS-GO.
X Depress the brake pedal and keep it
depressed.
X Shift the automatic transmission to position
N.
X Release the brake pedal.
X Release the electric parking brake.
X Switch off the ignition and leave the key in the
ignition lock.
You can wash the vehicle in an automatic car
wash from the very start.
If the vehicle is very dirty, wash off excess dirt
before cleaning the vehicle in an automatic car
wash.
After using an automatic car wash, wipe off the
wax from the windscreen and the windscreen
wiper blades. This will prevent smears and
reduce wiping noises caused by residue on the
windscreen.
Washing by hand In some countries, washing by hand is only
allowed at specially equipped washing bays.
Observe the legal requirements for each indi-
vidual country.
X Do not use hot water and do not wash the
vehicle in direct sunlight.
X Use a soft sponge to clean. 338
CareMaintenance and care