2018 MERCEDES-BENZ GLS SUV service

XTo switch the alarm off with the Smart-
Key:press the %or& button on the
SmartKey.
The alarm is stopped.
or
XInsert the SmartKey into the ignition lock.
The alarm is stopped.
XTo stop the alarm using KEYLESS-GO:
grasp the outside door handle. The SmartKey
must be outside the vehicle.
The alarm is stopped.
or
XPress the Start/Stop button on the dash-
board. The SmartKey must be inside the vehi- cle.
The alarm is stopped.
The alarm is not switched off, even if you close
the open door that triggered it, for example.
iIf the alarm continues for more than
30 seconds, the mbrace emergency call sys-
tem automatically notifies the Customer
Assistance Center. This is done either by text message or data connection. The emergency
call system sends the message or data provi-
ded that:
Ryou have subscribed to the mbrace service.
Rthe mbrace service has been activated
properly.
Rthe necessary mobile phone network is
available.
76Protection against theft
Safety

XAvoid frequent acceleration or braking.
XHave 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
GWARNING
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
GWARNING
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.
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
intervals and in accordance with the Mercedes-
Benz service requirements. You can obtain current information concerning
the servicing of your vehicle at any time from a
qualified specialist workshop. This could be an
overview of the mainte
nance w
ork or any addi-
tional maintenance work, for example.
ECO display
The ECO display shows you how economical
your driving style is. The ECO display assists you
in achieving the most economical driving style
for the selected settings and prevailing condi-
tions. Your driving style can significantly influ-
ence the vehicle's consumption.
:Acceleration
;Coasting
=Constant
?Additional range achieved
Range ?is shown under Bonus
fr.Startand
represents the additional range achieved since
the beginning of the journey as a result of an
adapted driving style.
If the fuel level has dropped into the reserve
range, the Reserve Fuel
message is shown in
the multifunction display instead of range ?.
The 8 warning lamp in the instrument cluster
also lights up (
Ypage 288).
Driving tips165
Driving an d parking
Z

For more information on driving with summer
tires, see (Ypage 356).
Observe the notes in the "Changing a wheel"
section (
Ypage 374).
Off-road driving
Important safety notes
GWARNING
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.
GWARNING
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 off road or on unpaved roads,
check the vehicle's underside regularly. In
particular, remove parts of plants or other
flammable materials which have become
trapped. In the case of damage, contact a
qualified specialist workshop.
GWARNING
If the vehicle level is high, the vehicle center of gravity is raised. This could cause the vehicle
to 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:
Rthe vehicle becomes stuck, e.g. on a high
curb or an unpaved road
Ryou drive too fast over an obstacle, e.g. a
curb, a speed bump or a pothole in the road
Ra 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
twigs can gather between the underbody and
the underbody paneling. If these materials
come in contact with hot parts of the exhaust
system, they can catch fire.
In such situations, have the vehicle checked
and repaired immediately at a qualified spe-
cialist workshop. If on continuing your jour-
ney you notice that driving safety is impaired,
pull over and stop the vehicle immediately,
paying attention to road and traffic condi-
tions. In such cases, consult a qualified spe-
cialist wor kshop.
W

hen driving off-road, substances such as sand,
mud and water or water mixed with oil may get
into the brakes. This could result in a reduced
braking effect or in total brake failure and also in
increased wear and tear. The braking charac-
teristics change depending on the material
entering the brakes. Clean the brakes after driv-
ing off-road. If you detect a reduced braking
effect or grinding noises, have the brake system checked in a qualified specialist workshop as
soon as possible. Adapt your driving style to the
different braking characteristics.
Driving off-road increases the likelihood of dam-
age to the vehicle, which, in turn, can lead to
failure of the mechanical assembly or systems.
Adapt your driving style to suit the terrain con-
ditions. Drive carefully. Have damage to the
vehicle rectified immediately at a qualified spe-
cialist workshop.
Do not switch to transmission position Nwhen
driving off-road. If you try to brake the vehicle
using the service brake, you could lose control
of the vehicle. If the gradient is too steep for your
vehicle, drive back down in reverse gear.
General notes
HEnvironmental note
Protection of the environment is of primary
importance. Treat nature with respect.
Observe all prohibiting signs.
Read this section carefully before driving your
vehicle off-road. Practice by driving over more
gentle off-road terrain first.
170Driving tips
Driving and parking

HOLD function
General notes
The HOLD function can assist the driver in the
following situations:
Rwhen pulling away, especially on steep slopes
Rwhen maneuvering on steep slopes
Rwhen waiting in traffic
The vehicle is kept stationary without the driver having to depress the brake pedal.
The braking effect is canceled and the HOLD
function deactivated when you depress the
accelerator pedal to pull away.
iDo not use the HOLD function when driving
off-road, on steep uphill or downhill gradients
or on slippery or loose surfaces. The HOLD
function cannot hold the vehicle on such sur-
faces.
Important safety notes
GWARNING
If the vehicle is only braked using the HOLD
function, the vehicle may roll away in the fol-
lowing situations when you leave the vehicle:
Rif there is a malfunction in the system or in the voltage supply
Rif the HOLD function is deactivated by
depressing the accelerator pedal or brake
pedal, e.g. by a vehicle occupant
Rif the electrical system in the engine com-
partment, the battery or the fuses are tam-
pered with or the battery is disconnected
There is a risk of an accident.
Always deactivate the HOLD function and
secure the vehicle against rolling away before
you leave it.
!When Distance Pilot DISTRONIC or the
HOLD function is activated, the vehicle
brakes automatically in certain situations.
To avoid damage to the vehicle, deactivate
Distance Pilot DISTRONIC and the HOLD
function in the following or similar situations:
Rwhen towing the vehicle
Rin the car wash
Deactivate the HOLD function (
Ypage 187).
Activation conditions
You can activate the HOLD function if:
Rthe vehicle is stationary
Rthe engine is running or if it has been auto-
matically switched off by the ECO start/stop
function
Rthe driver's door is closed or your seat belt is
fastened
Rthe electric parking brake is released
Rthe transmission is in position h,kori
RDistance Pilot DISTRONIC is deactivated
Activating the HOLD function
XMake sure that the activation conditions are
met.
XDepress the brake pedal.
XQuickly depress the brake pedal further
until :appears in the multifunction display.
The HOLD function is activated. You can
release the brake pedal.
iIf depressing the brake pedal the first time
does not activate the HOLD function, wait
briefly and then try again.
Deactivating the HOLD function
The HOLD function is deactivated automatically
if:
Ryou depress the accelerator and the trans-
mission is in position hork
Ryou shift the transmission to position j
Ryou depress the brake pedal again with a cer-
tain amount of pressure until:disappears
from the multifunction display
Ryou secure the vehicle using the electric park- ing brake
Ryou activate Distance Pilot DISTRONIC
iAfter a time, the electric parking brake
secures the vehicle and relieves the service
brake.
Driving systems187
Driving and parking
Z

There is a short delay before a change in outside
temperature appears in the multifunction dis-
play.
Coolant temperature gauge
GWARNING
Opening the hood when the engine is over-
heated or when there is a fire in the engine
compartment could expose you to hot gases
or other service products. There is a risk of
injury.
Let an overheated engine cool down before
opening the hood. If there is a fire in the
engine compartment, keep the hood closed
and contact the fire department.
!If the coolant temperature is too high, a dis-
play message is shown.
If the coolant temperature display is in the
area marked in red, do not continue driving.
Otherwise, the engine will be damaged.
The coolant temperature gauge is in the instru-
ment cluster on the right-hand side (
Ypage 37).
Under normal operating conditions and with the
specified coolant level, the coolant temperature gauge may rise to the red marking.
Operating the on-board computer
Overview
:Multifunction display
;Right control panel
=Left control panel
XTo activate the on-board computer: turn
the SmartKey to position 1in the ignition
lock.
You can control the multifunction display and
the settings in the on-board computer using the
buttons on the multifunction steering wheel.
Vehicles with the COMAND multimedia system: you can find further information on the Voice
Control System in the separate operating
instructions.
Vehicles with the Audio 20 multimedia system:
you can find further information on voice-oper-
ated control for navigation in the manufactur-
er's operating instructions.
234Displays and operation
On-board computer and displays

Telephone menu
Introduction
GWARNING
If you operate information systems and com-
munication equipment integrated in the vehi-
cle when driving, you may be distracted from
the traffic situation. You could also lose con-
trol of the vehicle. There is a risk of an acci-
dent.
Only operate this equipment when the traffic
situation permits. If you are not sure that this
is possible, park the vehicle paying attention
to traffic conditions and operate the equip-
ment when the vehicle is stationary.
When telephoning, you must observe the legal
requirements for the country in which you are
currently driving.
XSwitch on the mobile phone (see the manu-
facturer’s operating instructions).
XSwitch on the multimedia system (see the
Digital Operator's Manual)
XEstablish a Bluetooth®connection to the mul-
timedia system (see the Digital Operator's
Manual).
XPress the =or; button on the steering
wheel to select the Telmenu.
You will see one of the following display mes-
sages in the multifunction display:
RPhone READYor the name of the network
provider: the mobile phone has found a net-
work and is ready to receive.
RPhone No Service: there is no network
available or the mobile phone is searching for
a network.
Accepts a call
If someone calls you when you are in the Telmenu, a display message appears in the multi-
function display.
You can accept a call at any time regardless of
the menu selected.
XPress the6button on the steering wheel
to accept an incoming call.
Rejecting or ending a call
You can end or reject a call even if you are not in
the Telmenu.
XPress the ~button on the steering wheel
to reject or end a call.
Selecting an entry from the phone book
XPress the =or; button on the steering
wheel to select the Telmenu.
XPress the9,:ora button to
switch to the phone book.
XAuthorize access to the phone book on the
phone.
XPress the 9or: button to select the
desired name.
or
XTo start rapid scrolling: press and hold the
9 or: button for longer than one sec-
ond.
Rapid scrolling stops when you release the
button or reach the end of the list.
XIf only one telephone number is stored for
a name: press the 6ora button to
start dialing.
or
XIf there is more than one number for a
particular name: press the6ora
button to display the numbers.
XPress the 9or: button to select the
number you want to dial.
XPress the 6ora button to start dialing.
or
XTo exit the telephone book: press the~
or % button.
Redialing
The on-board computer saves the last names or
numbers dialed in the redial memory.
XPress the =or; button on the steering
wheel to select the Telmenu.
XPress the6button to switch to the redial
memory.
XPress the 9or: button to select the
desired name or number.
240Menus and submenus
On-board computer and displays

Activating/deactivating Active Brake
Assist
You can use these functionsto activate/deac -
tivat eActive Brake Assis tor, on vehicles wit h
th eDrivin gAssistance package, to activat eor
deactivat eActive Brake Assis twit hcross-traffic
function .
XPress the= or; buttonon th esteering
whee lto select th eDriveAssistmenu.
XPress th e9 or: buttonto select
Brake Assist.
XPress ato confirm .
The curren tselection appears.
XTo activate/deactivate: press thea but-
to nagain .
When Active Brake Assis tor Active Brake
Assis twit hcross-traffic function is deactiva-
ted, th eæ symbol appear sin th emulti-
function display in th eassistanc egraphic dis-
play.
Further information on Active Brake Assis t
(
Ypage 67) and Active Brake Assis twit hcross -
traffic function (Ypage 72).
Activating/deactivating ATTENTION
ASSIST
XPress the= or; buttonon th esteering
whee lto select th eDriveAssistmenu.
XPress th e9 or: buttonto select
Attention Assist.
XPress th ea button.
The curren tselection appears.
XPress ato confirm .
XPress the: or9 buttonto set Off,
Standardor Sensitive.
XPress th ea buttonto sav eth esetting .
When ATTENTION ASSIST is deactivated, th e
é symbol appear sin th emultifunction dis-
play in th eassistanc egraphic sdisplay.
Fo rfurther information about ATTENTION
ASSIST ,see (
Ypage 207).
Activating/deactivating Blind Spot
Assist
XPress th e= or; buttonon th esteering
whee lto select th eDriveAssistmenu.
XPress th e9 or: buttonto select
Blind Spo tAssist.
XConfir mby pressing aon thesteering
wheel.
The curren tselection appears.
XTo activate/deactivate: press thea but-
to nagain .
Fo rfurther information about Blind Spot Assist,
see (
Ypage 209).
Fo rfurther information about Active Blind Spot
Assist, see (
Ypage 213).
Activating/deactivating Lane Keeping
Assist
XPress th e= or; buttonon th esteering
whee lto select th eDriveAssistmenu.
XPress th e9 or: buttonto select
Lan eKeepin gAssist.
XPress ato confirm .
The curren tselection appears.
XPress ato confirm .
XPress the: or9 buttonto set Off,
Standardor Adaptive.
When Lan eKeepin gAssis tor Active Lan e
Keepin gAssis tis activated, th emultifunction
display shows th elan emarking sas bright
lines in th eassistanc egraphic .
XPress th ea buttonto sav eth esetting .
Fo rfurther information about Lan eKeepin g
Assist, see (
Ypage 211).
Fo rfurther information about Active Lan eKeep-
ing Assist, see (
Ypage 215).
Service menu
Dependingon th eequipmen tinstalled in th e
vehicle, you hav eth efollowin goption sin th e
Serv.
menu:
Rcalling up display message sin message mem -
ory (Ypage 248)
Rrestarting th etire pressur eloss warning sys-
te m (Ypage 361) or checking th etire pres-
sur eelectronically (Ypage 363)
Rcalling up theservic edue dat e (Ypage 329).
242Menus and submenus
On-board computer and displays

Settings menu
Introduction
Depending on the equipment installed in the
vehicle, In the Sett.menu you have the follow-
ing options:
RChanging the instrument cluster settings
(Ypage 243)
RChanging the light settings (Ypage 243)
RChanging the vehicle settings (Ypage 244)
RChanging the convenience settings
(Ypage 244)
RRestoring the factory settings (Ypage 245)
Instrument cluster submenu
Selecting the distance unit
The Display Unit Speedometer / Odome‐ter:function allows you to choose whether
certain displays appear in kilometers or miles in
the multifunction display.
XPress the =or; button on the steering
wheel to select the Sett.menu.
XPress the:or9 button to select the
Instrument Clustersubmenu.
XPress ato confirm.
XPress the :or9 button to select the
Display Unit Speedometer / Odometer
function.
You will see the selected setting: kmormiles.
XPress the abutton to save the setting.
The selected unit of measurement for distance
applies to:
RDigital speedometer in the Tripmenu
ROdometer and the trip odometer
RTrip computer
RCurrent consumption and the range
RNavigation instructions in the Navimenu
RCruise control
RDistance Pilot DISTRONIC
RASSYST PLUS service interval display
Selecting permanent display
ThePermanent Display:function allows you
to choose whether the multifunction display
always shows the outside temperature or the
speed. The speed display is inverse to the speedome-
ter.
XPress the
=or; button on the steering
wheel to select the Sett.menu.
XPress the:or9 button to select the
Instrument Clustersubmenu.
XConfirm by pressing aon the steering
wheel.
XPress the :or9 button to select the
Permanent Display:function.
The current setting, Outside Temperature,
Speedometer [km/h]or Speedometer[mph]appears.
XTo change the setting: pressaagain.
Light submenu
Setting the daytime running lamps
This function is not available in Canada.
XPress the =or; button on the steering
wheel to select the Sett.menu.
XPress the:or9 button to select the
Lightsubmenu.
XPress ato confirm.
XPress :or9 to select the DaytimeRunning Lightsfunction.
If the DaytimeRunningLightsfunction has
been switched on, the cone of light and the
W symbol in the multifunction display are
shown in orange.
XPress the abutton to save the setting.
Further information on daytime running lamps
(
Ypage 115).
Switching the Intelligent Light System
on/off
XPress the =or; button on the steering
wheel to select the Sett.menu.
XPress the:or9 button to select the
Lightsubmenu.
XPress ato confirm.
XPress the :or9 button to select the
Intell. Light Systemfunction.
If the Intell. Light Systemfunction has
been switched on, the cone of light and the
L symbol in the multifunction display are
shown in orange.
XPress the abutton to save the setting.
When you activate Intell. Light System
,
you activate the following functions:
Menus and submenus243
On-board computer and displays
Z