2018 MERCEDES-BENZ GLS SUV ECU

Warning/
indicator
lampNSignal type
Possible causes/consequences and M
Solutions
?NThe red coolant warning lamp comes on while the engine is running.
The coolant level is too low.
If the coolant level is correct, the airflow to the engine radiator may be blocked or
the electric engine radiator fan may be defective.
The coolant is too hot and the engine is no longer being cooled sufficiently.
XObserve the additional display messages in the multifunction display.
XPull over and stop the vehicle safely and switch off the engine, paying attention
to road and traffic conditions.
XSecure the vehicle against rolling away (Ypage 161).
XLeave the vehicle and keep a safe distance from the vehicle until the engine has cooled down.
XCheck the coolant level and add coolant, observing the warning notes
(Ypage 328).
XIf you have to add coolant frequently, have the engine cooling system checked.
XMake sure that the air supply to the engine radiator is not blocked, e.g. by snow,
slush or ice.
XDo not start the engine again until the coolant temperature is below 248 ‡
(120 †). Otherwise, the engine could be damaged.
XDrive to the nearest qualified specialist workshop.
XAvoid heavy loads on the engine as you do so, e.g. driving in mountainous terrain
and stop-and-go traffic.
?N The red coolant warning lamp comes on while the engine is running.
The coolant temperature has exceeded 248 ‡ (120 †). The airflow to the engine
radiator may be blocked or the coolant level may be too low.
GWARNING
The engine is not being cooled sufficiently and may be damaged.
Do not drive when your engine is overheated. This can cause some fluids which
may have leaked into the engine compartment to catch fire.
Steam from the overheated engine can also cause serious burns which can occur
just by opening the hood.
There is a risk of injury.
XObserve the additional display messages in the multifunction display.
XPull over and stop the vehicle safely and switch off the engine, paying attention
to road and traffic conditions.
XSecure the vehicle against rolling away (Ypage 161).
XLeave the vehicle and keep a safe distance from the vehicle until the engine has
cooled down.
XCheck the coolant level and add coolant, observing the warning notes
(Ypage 328).
XIf you have to add coolant frequently, have the engine cooling system checked.
XMake sure that the air supply to the engine radiator is not blocked, e.g. by snow,
slush or ice.
Warning and indicator lamps in the instrument cluster289
On-board computer and displays
Z

Tires
Warning/
indicator
lampNSignal type
Possible causes/consequences and M
Solutions
hNThe yellow tire pressure monitor warning lamp (pressure loss/malfunction) is lit.
The tire pressure monitor has detected a loss of pressure in at least one of the tires.
GWARNING
Tire pressures that are too low pose the following hazards:
Rthey may burst, especially as the load and vehicle speed increase.
Rthey may wear excessively and/or unevenly, which may greatly impair tire trac-
tion.
Rthe driving characteristics, as well as steering and braking, may be greatly
impaired.
There is a risk of an accident.
XStop the vehicle without making any sudden steering or braking maneuvers. Pay
attention to the traffic conditions as you do so.
XSecure the vehicle against rolling away (Ypage 161).
XObserve the additional display messages in the multifunction display.
XCheck the tires and, if necessary, follow the instructions for a flat tire
(Ypage 339).
XCheck the tire pressure (Ypage 361).
XIf necessary, correct the tire pressure.
hN The yellow tire pressure monitor warning lamp (pressure loss/malfunction)
flashes for approximately one minute and then remains lit.
The tire pressure monitor is faulty.
GWARNING
The system is possibly unable to recognize or register low tire pressure.
There is a risk of an accident.
XObserve the additional display messages in the multifunction display.
XVisit a qualified specialist workshop immediately.
Warning and indicator lamps in the instrument cluster291
On-board computer and displays
Z

Connecting a mobile phone
(COMAND)
Requirements
For telephony via the Bluetooth®interface, you
require a Bluetooth®-capable mobile phone. The
mobile phone must support Hands-Free Profile
1.0 or above.
Multimedia system:
XSelect VehicleQSystem Set‐tingsQActivate Bluetooth.
XActivate Bluetooth®O.
Mobile phone:
XActivate Bluetooth®and, if necessary, Blue-
tooth®visibility for other devices (see the
manufacturer's operating instructions).
The Bluetooth
®device names for all of one man-
ufacturer's products might be identical. To
make it possible to clearly identify your mobile
phone, change the device name (see the man-
ufacturer's operating instructions).
If the mobile phone supports the PBAP (Phone
B ook Access Profile) and MAP (M essage
Access Profile) Bluetooth
®profiles, the follow-
ing information will be transmitted after you
connect:
RPhone book
RCall lists
RText messages and e-mail
iFurther information on suitable mobile
phones can be found at: http://
www.mercedes-benz.com/connect
iIn the USA, you can get in touch with the
Mercedes-Benz Customer Assistance Center
on 1-800-FOR-MERCedes (1-800-367-6372 ).
In Canada, you can get in touch with the Cus-
tomer Relations Center on 1-800-387-0100.
Searching for and authorizing (connect-
ing) a mobile phone
Before using your mobile phone with the multi-
media system for the first time, you will need to
search for the phone and then authorize (con-
nect) it. Depending on the mobile phone, author- ization either takes place by means of Secure
Simple Pairing or by entering a passkey. The
multimedia system automatically makes the procedure that is relevant for your mobile phone
available. The mobile phone is always connec-
ted automatically after authorization. Further
information on using a mobile phone with the
multimedia system (see the Digital Operator's
Manual).
If the multimedia system does not detect your
mobile phone, this may be due to particular
security settings on your mobile phone (see the
manufacturer's operating instructions).
Only one mobile phone can be connected to the
multimedia system at any one time.
Searching for a mobile phone
Multimedia system:
XSelect
Tel/®QConn.DeviceQSearch for PhonesQStartSearch.
The available mobile phones are displayed.
Symbols in the device list
Sym-
bolExplanation
ÏNew mobile phone found, not yet
authorized.
ÑMobile phone is authorized, but is
not connected.
Connecting a mobile phone
Authorization using Secure Simple Pairing:
XSelect mobile phone.
A code is displayed in the multimedia system
and on the mobile phone.
XIf codes match: selectYeson the multimedia
system.
XConfirm code on the mobile phone. Depend-
ing on the mobile phone used, confirm the
connection to the multimedia system and for
the PBAP and MAP Bluetooth
®profiles. The
prompt to confirm may take up to two
minutes to be displayed (see the manufactur-
er's operating instructions).
XIf the codes are different: selectNoon the
multimedia system.
The process is canceled.
Repeat authorization.
296Operating system
Multimedia system

Authorization by entering a passkey (passcode):
XSelect the Bluetooth®name of the mobile
phone.
The input menu for the passkey is displayed.
XChoose a one to sixteen-digit number combi- nation as a passkey.
XEnter the passkey on the multimedia system.
XPress ¬to confirm.
XEnter and confirm the passkey on the mobile
phone. Depending on the mobile phone used,
confirm the connection to the multimedia sys-
tem and for the PBAP and MAP Bluetooth
®
profiles. The prompt to confirm may take up
to two minutes to be displayed (see the man-
ufacturer's operating instructions).
Connecting a mobile phone (Audio 20)
Requirements
For telephony via the Bluetooth®interface, you
require at least one Bluetooth®-capable mobile
phone depending on use of one-telephone
mode ortwo-telephone mode . The mobile
phone must support Hands-Free Profile 1.0 or
above.
In two-telephone mode you can use all the
functions of the multimedia system with the
main telephone . With theadditional tele-
phone , you can receive incoming calls.
Multimedia system:
XSelect VehicleQSystem Set‐tingsQActivate Bluetooth.
XActivate Bluetooth®O.
Mobile phone:
XActivate Bluetooth®and, if necessary, Blue-
tooth®visibility for other devices (see the
manufacturer's operating instructions).
The Bluetooth
®device names for all of one man-
ufacturer's products might be identical. To
make it possible to clearly identify your mobile
phone, change the device name (see the man-
ufacturer's operating instructions). If the mobile phone supports the PBAP (
Phone
Book Access Profile) and MAP ( Message
A ccess Profile) Bluetooth
®profiles, the follow-
ing information is transmitted after you connect
the main telephone:
RPhone book
RCall lists
RText messages and e-mail
iFurther information on suitable mobile
phones can be found at: http://
www.mercedes-benz.com/connect
iIn the USA, you can get in touch with the
Mercedes-Benz Customer Assistance Center
on 1-800-FOR-MERCedes (1-800-367-6372).
In Canada, you can get in touch with the Cus-
tomer Relations Center on 1-800-387-0100.
Searching for and authorizing (connect-
ing) a mobile phone
Before using your mobile phone with the multi-
media system for the first time, you will need to
search for the phone and then authorize (con-
nect) it. Depending on the mobile phone, author-ization either takes place by means of Secure
Simple Pairing or by entering a passkey. The
multimedia system automatically makes the
procedure that is relevant for your mobile phone
available. The mobile phone is always connec-
ted automatically after authorization. Further
information on using a mobile phone with the
multimedia system (see the Digital Operator's
Manual).
If the multimedia system does not detect your
mobile phone, this may be due to particular
security settings on your mobile phone (see the
manufacturer's operating instructions).
Searching for a mobile phone
Multimedia system:
XSelect Tel/®QConn. DeviceQCon‐nect New Device.
XSelectConnect via Vehicle.
XSelect mobile phone.
Connecting a mobile phone
XOne-telephone mode: selectConnect as
New Main Phone.
XTwo-telephone mode: selectConnect as
Additional Phonewhen a mobile phone is
already connected.
Operating system297
Multimedia system
Z

XAuthorization using Secure Simple Pair-
ing:
A co de is displ ayedinthe multimed iasystem
and on the mob ilephone.
XConfirm co deon the mob ilephone. Depend-
ing on the mob ilephone used, confirm the
connection to the multimedia system and for
the PBAP and MAP Bluetooth
®profile s. The
prompt to confirm may take up to two
minutes to be displayed (see the manufactur-
er's operating instructions).
XIf the codes are different: select Noon the
multimedia system.
The process iscanceled.
Repeat authorization.
or
XAuthorization by entering a passkey
(passcode): enter any one- to sixteen-digit
number sequence which you have chosen
yourself into the passkey input menu.
XPress ¬to confirm.
XEnter and confirm the passkey on the mob ile
phone. Dependin g on the mobilephone used,
confirm the connection to the multimed iasys-
tem and for the PBAP and MAP Bluetooth
®
profile s. The prompt to confirm may take up
to two minutes to be displayed (see the man-
ufacturer's operating instructions).
Symbols in the device manager
The symbols are shown in color depending on
their use.
SymbolExplanation
Mobile phone connected to the
multimedia system
Main telephone with full range of
functions
Ad ditional telephone for incoming
calls intwo telephone mode
Media mode
General notes
If you wish toplay external media sources, the
appropriate media mode must already beturned
on. Further information on media mode (see the
Digital Operator's Manual). The following external media sources can
be
used:
RApple®devices (e.g. iPhone®)
RUSB devices (e.g. USB stick, MP3 player)
(Ypage 299)
RCD
RDVD (COMAND)
RSD cards
Rvia devices connected by Bluetooth®
iIn formation on single CD/DVD drive or DVD
changer (see the Digital Operator's Manual).
Selecting using the device list
Multimedia system:
XSelect MediaQDevices.
The available media sources willbe shown.
The #dot indicates the current setting.
XSelect the media source.
Playable files are played.
Inserting/removing an SD card
Important safety notes
GWARNING
SD cards are small parts. They can beswal-
lowed and cause choking. This poses an
increased risk of injury or even fatal injury.
Keep the SDcard out of the reach of children.
If aSD card is swallowed, seek medical atten-
tion immediately.
!If you are no longer using the SDcard,you
should remove itand store it outside the vehi-
cle. High temperatures can damage the card.
Inserting an SD card
The SDcard slot islocated on the control panel.
XInsert the SD card into the SDcard slot until
the SD card engages. The side with the con-
tacts must face down.
Removing an SD card
XPress the SD card.
The SDcard is ejected.
XRemo vethe SDcard.
298Operating system
Multimedia system

Stowage areas
Loading guidelines
GWARNING
If objects, luggage or loads are not secured or
not secured sufficiently, they could slip, tip
over or be flung around and thereby hit vehicle
occupants. There is a risk of injury, particu-
larly in the event of sudden braking or a sud-
den change in direction.
Always store objects so that they cannot be
flung around. Secure objects, luggage or
loads against slipping or tipping before the
journey.
GWARNING
Combustion engines emit poisonous exhaust
gases such as carbon monoxide. If the tailgate
is open when the engine is running, particu-
larly if the vehicle is moving, exhaust fumes
could enter the passenger compartment.
There is a risk of poisoning.
Turn off the engine before opening the tail-
gate. Never drive with the tailgate open.
GWARNING
The exhaust tail pipe and tail pipe trim can
become very hot. If you come into contact
with these parts of the vehicle, you could burn
yourself. There is a risk of injury.
Always be particularly careful around the
exhaust tail pipe and the tail pipe trim. Allow
these components to cool down before touch-
ing them.
The gross vehicle weight (GVW) is the vehicle
weight including fuel, vehicle tool kit, spare
wheel, installed accessories, vehicle occupants
and luggage/cargo.
Do not exceed the load limit or permitted gross
vehicle weight rating (GVWR) for your vehicle.
The gross load limit and the GVWR are specified
on the vehicle identification plate on the B-pillar
of the driver's door (
Ypage 364).
The load must also be distributed so that the
weight on each axle never exceeds the gross
axle weight rating (GAWR) for the front and rear
axles. The specifications for GVWR and GAWR are on the vehicle identification plate on the B-
pillar of the driver's door (
Ypage 364).
Observe the notes on loading the vehicle
(
Ypage 364).
The handling characteristics of a laden vehicle
are dependent on the distribution of the load
within the vehicle. For this reason, you should
observe the following notes when transporting a
load:
RNever exceed the maximum permissible
gross vehicle mass or the gross axle weight
rating for the vehicle (including occupants).
RThe cargo compartment is the preferred place to carry objects.
RPosition heavy loads as far forward as possi-
ble and as low down in the cargo compart-
ment as possible.
RThe load must not protrude above the upper
edge of the seat backrests.
RAlways place the load against the rear or frontseat backrests. Make sure that the seat
backrests are securely locked into place.
RAlways place the load behind unoccupied
seats if possible.
RUse the cargo tie-down rings and the parcel
nets to transport loads and luggage.
RUse cargo tie-down rings and fastening mate-
rials appropriate for the weight and size of theload.
RSecure the load with sufficiently strong and
wear-resistant tie-downs. Pad sharp edges for
protection.
Stowage spaces
Important safety notes
GWARNING
If you transport objects in the vehicle interior
and these are not adequately secured, they
could slip or be flung around and thereby
strike vehicle occupants. In addition, cup
holders, open stowage spaces and mobile
phone brackets may not always be able to
hold the objects placed in them in the event of
an accident. There is a risk of injury, particu-
larly in the event of sharp braking or sudden
changes of direction.
300Stowage areas
Stowage and features

RAlways stow objects in such a way that they
cannot be tossed about in these or similar
situations.
RAlways make sure that objects do not pro-
trude out of the stowage spaces, luggage
nets or stowage nets.
REnsure that closable stowage spaces are
shut before beginning your journey.
RAlways stow and secure heavy, hard, poin-
ted, sharp-edged, fragile or large objects in
the cargo compartment.
Observe the loading guidelines (
Ypage 300).
Glove box
XTo open: pull handle :and open glove box
flap ;.
XTo close: fold glove box flap ;up until it
engages.
iThe glove box can be cooled and ventilated
(Ypage 136).
1Glove box unlocked
2Glove box locked
The glove box can be locked and unlocked using the mechanical key.
Partition :for stowing flat objects is located in
the upper section of the glove box. It can be
removed to increase the stowage space in the
glove box.
XTo remove: pull out partition :.
XTo install:insert partition :and push it back
until it engages.
Stowage compartment under the arm-
rest
Vehicles without touchpad
XTo open: pull handle :up.
The armrest folds out.
Stowage areas301
Stowag ean d features
Z

Vehicles with touchpad and COMAND
XTo open:press button :at the front.
Armrest ;folds out.
Depending on the vehicle equipment, there is a
multimedia connector unit with two USB ports,
e.g. for iPod
®, iPhone®or MP3 player in the
stowage compartment .
iThere is a removable stowage tray in the
storage compartment, in which objects such
as an iPod
®can be stored.
Eyeglasses compartment
XTo open: press marking :.
The eyeglasses compartment opens down.
XTo close: press marking :again and the
eyeglasses compartment moves up and
engages.
Make sure that the eyeglasses compartment is
always closed while the vehicle is in motion.
Stowage compartment in the front cen- ter console
XTo open: slide cover :forwards.
Stowage compartment ;appears.
XTo close: pull cover :back as far as it will go.
Stowage compartment in the rear cen-
ter console
XTo open: briefly press the stowage compart-
ment marking.
The stowage compartment opens.
iDepending on the vehicle's equipment,
there may be open stowage spaces above and
below the stowage compartment.
Stowage net
GWARNING
Vehicles with the Occupant Classification
System (OCS):
If the gross weight of the objects in the stow- age net on the back of the front-passenger
seat is greater than 4.4 lb (2 kg), OCS cannot
correctly assess the occupant's weight cate-
gory. The front-passenger front air bag could
deploy without cause, or may fail to deploy in
the event of an accident. This poses an
increased risk of injury or even fatal injury.
Always observe the permissible gross weight
of 4.4 lb (2 kg). Stow and secure heavy
objects in the cargo compartment.
302Stowage areas
Stowage and features