2016 MERCEDES-BENZ GL-Class warning

using the brake controller and check
whether the brakes function correctly.
RSecure any objects on the trailer to prevent
the cargo from slipping when the vehicle is
in motion.
RWhen you couple up a trailer, check at reg-
ular intervals that the load isfirmly secured.
If the trailer isequipped with trailer lights
and brakes, check the trailer to ensure that
these are working.
RBear inmind that the handlin g will be less
stable when towing a trailer than when driv-
ing without one. Avoid sudden steering
movements.
RThe vehicle/trailer combination isheavier,
accelerates more slowly, has a decreased
gradient cli mbing capability and a longer
braking distance.
It is more susceptible to side winds and
requires more careful steering.
RIf possible, do not brake suddenly, but
instead depress the brake pedal moder-
ate lyat first so that the trailer can activate
it s brakes. Then increase the pressure on
the brake pedal.
RIf the automat ictransmission repeatedly
shifts between gears on uphill or downhill
gradients, shift to a lower gear using the
left-hand steering wheel paddleshifter.
A lower gear and lower speed reduce the
risk of engine failure.
RWhen drivingdown hill, shift to a lower gear
to uti lize the engine's braking effect.
Avoid co ntin
uous brake application as this
may overheat the vehicle brakes and, if
instal led,the trailer brakes.
RIfthe coolant temperature increases dra-
matical ly while the air-cond itioning system
is swit ched on, switch off the air-condition-
ing system.
Coolant heat can also bedissipated by
opening the windows and switching the ventilation
blower and the interior temper-
ature to the highest leve l.
RWhen overtaking, pay particular attention
to the extended length of your vehicle/
trailer combination.
Due to the length of the vehicle/trailer
combination, you require additional road
spaceinrelation to the vehicle you are
overtaking before you can change back to
the original lane.
Decoupling a trailer
GWARNIN G
If you uncouple atrailer wit hth eoverrun
brak eengaged ,you could trap your han d
between th evehicl eand th etrailer drawbar.
Ther eis aris kof injury.
Do no tuncouple atrailer if th eoverrun brak e
is engaged .
GWARNING
Vehicles wit hleve lcontrol :
The vehicl eis lowered as soo nas you discon -
nect th etrailer cable. This could result in your
limb sor those of other people that are
between th evehicl ebody and tires or under-
neath th evehicl ebein gtrapped .Ther eis a
ris kof injury.
Mak esure that nobody is in th eimmediat e
vicinity of th ewhee lhousing sor under th e
vehicl ewhen you disconnect th etrailer cable.
!Do not disconnect a trailer with an
engaged overrun brake. Otherwise, your
vehicle could bedamaged bythe rebound-
ing of the overrun brake.
XSh ift the transmission to position P.
XApply the vehicle's electr icparking brake.
XStart the engine.
XClose the doors and tailgate.
XApply the trailer's parking brake.
268Towing a trailer
Driving and parking

Useful information............................272
Important safety notes .....................272
Displays and operation .....................272
Menus and submenus ......................275
Display messages ............................. 290
Warning and indicator lamps in the
instrument cluster ............................324
271
On-board computer and displays

Useful information
i
This Operator's Manual describes all
models and all standard and optional equip-
ment of your vehicle available at the time of
publication of the Operator's Manual.
Country-specific differences are possible.
Please note that your vehicle may not be
equipped with all features described. This
also applies to safety-related systems and
functions.
iRead the information on qualified special-
ist workshops (
Ypage 29).
Important safety notes
GWARNING
If you operate information systems and com-
munication equipment integrated in the vehi-
cle while driving, you will be distracted from
traffic conditions. You could also lose control
of the vehicle. There is a risk of an accident.
Only operate the 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.
You must observe the legal requirements for
the country in which you are currently driving
when operating the on-board computer.
GWARNING
If the instrument cluster has failed or mal-
functioned, you may not recognize function
restrictions in systems relevant to safety. The
operating safety of your vehicle may be
impaired. There is a risk of an accident.
Drive on carefully. Have the vehicle checked
at a qualified specialist workshop immedi-
ately.
If the operating safety of your vehicle is
impaired, pull over as soon as it is safe to do
so. Contact a qualified specialist workshop. The on-board computer only shows messages
or warnings from certain systems in the mul-
tifunction display. You should therefore make
sure your vehicle is operating safely at all
times.
For an overview, see the instrument panel
illustration (
Ypage 35).
Displays and operation
Instrument cluster lighting
The lighting in the instrument cluster, in the
displays and the controls in the vehicle inte-
rior can be adjusted using the brightness con-
trol knob.
The brightness control knob is located on the bottom left of the instrument cluster
(
Ypage 35).
XTurn the brightness control knob clockwise
or counter-clockwise.
If you turn the light switch to Ã,Tor
L, the brightness is dependent upon
the brightness of the ambient light.
iThe light sensor in the instrument cluster
automatically controls the brightness of
the multifunction display.
In daylight, the displays in the instrument
cluster are not illuminated.
Speedometer with segments
The speedometer is divided into segments
only on vehicles with DISTRONIC PLUS.
The segments in the speedometer indicate
which speed range is available.
RDISTRONIC PLUS activated (Ypage 205):
One or two segments in the set speed
range light up.
RDISTRONIC PLUS detects a vehicle in front
that is driving at a slower speed than the
stored speed:
The segments between the speed of the
vehicle in front and the stored speed light
up.
272Displays and operation
On-board computer and displays

Tachometer
!
Do not drive in the overrevving range, as
this could damage the engine.
The red band in the tachometer indicates the
engine's overrevving range.
The fuel supply is interrupted to protect the
engine when the red band is reached.
Outside temperature display
You should pay special attention to road con-
ditions when temperatures are around freez-
ing point.
Bear in mind that the outside temperature
display indicates the temperature measured
and does not record the road temperature.
The outside temperature display is in the mul-
tifunction display (
Ypage 275).
Changes in the outside temperature are dis-
played after a short delay.
Coolant temperature display
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.
!A display message is shown if the coolant
temperature is too high.
If the coolant temperature is over 248 ‡
(120 †), do not continue driving. The
engine will otherwise be damaged.
The coolant temperature gauge is in the
instrument cluster on the right-hand side
(
Ypage 35). Under normal operating conditions and with
the specified coolant level, the coolant tem-
perature may rise to 248 ‡ (120 †).
Operating the on-board computer
Overview
:Multifunction display
;Switches on the Voice Control System
(see the separate operating instructions)
=Right control panel
?Left control panel
ABack button
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.
Displays an doperation273
On-boa rd computer and displays
Z

tion display only shows the station preset if
station;is saved in the memory.
XSwitch on COMAND and select Radio; see
the separate operating instructions.
XPress the =or; button on the steer-
ing wheel to select the Audio
menu.
XTo select a stored station: briefly press
9 or:.
XTo select a station from the station list:
press and briefly hold the 9or:
button.
If no station list is received:
XTo select a station using the station
search: press and briefly hold the 9
or : button.
iSIRIUS XM satellite radio functions like a
normal radio.
You can find further information on radio
mode in the "Satellite radio" section of the
separate operating instructions.
Operating an audio player or audio
media
Audio data from various audio devices or
media can be played, depending on the equip-
ment installed in the vehicle.
XSwitch on COMAND and select audio CD or
MP3 mode; see the separate operating
instructions.
XPress the =or; button on the steer-
ing wheel to select the Audio
menu.
XTo select the next/previous track:
briefly press the9or: button.
XTo select a track from the track list
(rapid scrolling): press and hold the 9or
: button until the desired track :
has been reached.
If you press and hold 9or:, the
rapid scrolling speed is increased. Not all
audio drives or data carriers support this
function.
If track information is stored on the audio
device or medium, the multifunction display
will show the number and title of the track.
The current track does not appear in audio
AUX mode ( Auxiliary audio mode: external
audio source connected).
Video DVD operation
XSwitch on COMAND and select video DVD
(see the separate operating instructions).
XPress the =or; button on the steer-
ing wheel to select the Audio
menu.
XTo select the next or previous scene:
briefly press the9or: button.
XTo select a scene from the scene list
(rapid scrolling): press and hold the 9
or : button until desired scene :has
been reached.
Telephone menu
Introduction
GWARNING
If you operate information systems and com-
munication equipment integrated in the vehi-
cle while driving, you will be distracted from
traffic conditions. You could also lose control
of the vehicle. There is a risk of an accident.
Only operate the equipment when the traffic
situation permits. If you are not sure that this
is possible, park the vehicle paying attention
Menus and submenus279
On-board computer and displays
Z

XPress the6ora button to start dial-
ing.
or
XTo exit the redial memory: press the
~ or% button.
Assistance menu
Introduction
Depending on your vehicle's equipment, in
the Assist.
menu, you have the following
options:
RDisplaying the assistance graphic
(
Ypage 281)
RActivating/deactivating the distance warn- ing function (
Ypage 281)
RActivating/deactivating PRE-SAFE®Brake
(
Ypage 282)
RActivating/deactivating ATTENTION
ASSIST (
Ypage 282)
RActivating/deactivating Blind Spot Assist
or Active Blind Spot Assist (
Ypage 282)
RActivating/deactivating Lane Keeping
Assist or Active Lane Keeping Assist
(
Ypage 282)
Displaying the assistance graphic
XPress the =or; button on the steer-
ing wheel to select the Assist.
menu.
XPress9or: to select Assistance
graphic.
XConfirm by pressing aon the steering
wheel.
The multifunction display shows the
DISTRONIC PLUS distance display in the
assistance graphic.
The assistance graphic displays the status
of and information from the following driv-
ing systems or driving safety systems:
RDISTRONIC PLUS (Ypage 211)
RPRE-SAFE®Brake (Ypage 76)
RDistance warning function (Ypage 70)
RATTENTION ASSIST (Ypage 240)
RLane Keeping Assist (Ypage 246) or
Active Lane Keeping Assist
(
Ypage 251)
RDSR (Ypage 257)
ROff-road program (vehicles with the
ON&OFFROAD package) (
Ypage 258)
RRear window wiper (Ypage 140)
Activating/deactivating the distance
warning function
XPress the =or; button on the steer-
ing wheel to select the Assist.
menu.
XPress9or: to select Distance
warning.
Menus and submenus281
On-board computer and displays
Z

XPressato confirm.
The current selection appears.
XTo activate/deactivate: press thea
button again.
When the distance warning function is
deactivated, the assistance graphic shows
the æ symbol in the multifunction dis-
play.
Further information on the distance warning
function (
Ypage 70).
Activating/deactivating PRE-SAFE®
Brake
PRE‑SAFE®Brake is only available for vehi-
cles with the Driving Assistance package.
XPress =or; on the steering wheel
to select the DriveAssist
menu.
XPress the9or: button to select
PRE-SAFE Brake
.
XPress the abutton.
The current selection is displayed.
XTo activate/deactivate: press thea
button again.
When PRE-SAFE
®Brake is deactivated, the
assistance graphic shows the æsymbol
in the multifunction display.
For more information on PRE‑ SAFE
®Brake,
see (
Ypage 76).
Activating/deactivating ATTENTION
ASSIST
XPress the =or; button on the steer-
ing wheel to select the Assist.
menu.
XPress the9or: button to select
Attention Assist
XPress the abutton.
The current selection appears.
XTo activate/deactivate: press thea
button again.
When ATTENTION ASSIST is deactivated,
the é symbol appears in the multifunc-
tion display in the assistance graphics dis-
play. For further information about ATTENTION
ASSIST, see (
Ypage 240).
Activating/deactivating Blind Spot
Assist
XPress the
=or; button on the steer-
ing wheel to select the DriveAssist
menu.
XPress the9or: button to select
Blind Spot Assist
.
XConfirm by pressing aon the steering
wheel.
The current selection appears.
XTo activate/deactivate: press thea
button again.
For further information about Blind Spot
Assist, see (
Ypage 244).
For further information about Active Blind
Spot Assist, see (
Ypage 248).
Activating/deactivating Lane Keeping
Assist
XPress the =or; button on the steer-
ing wheel to select the DriveAssist
menu.
XPress the9or: button to select
Lane Keeping Assist
.
XPress ato confirm.
The current selection appears.
XPress ato confirm.
XPress the :or9 button to set Off,
Standard
or Adaptive.
When Lane Keeping Assist or Active Lane
Keeping Assist is activated, the multifunc-
tion display shows the lane markings as
bright lines in the assistance graphic.
XPress the abutton to save the setting.
For further information about Lane Keeping
Assist, see (
Ypage 246).
For further information about Active Lane
Keeping Assist, see (
Ypage 251).
282Menus and submenus
On-board computer and displays

Service menu
Depending on the equipment installed in the
vehicle, you have the following options in the
Serv.
menu:
RCalling up display messages in message
memory (
Ypage 290)
RRestarting the tire pressure loss warning
system (
Ypage 412) or checking the tire
pressure electronically (
Ypage 414)
RCalling up the service due date
(
Ypage 375)
Settings menu
Introduction
Depending on the equipment installed in the
vehicle, In the Settings
menu you have the
following options:
RChanging the instrument cluster settings
(
Ypage 283)
RChanging the light settings (Ypage 284)
RChanging the vehicle settings
(
Ypage 285)
RChanging the convenience settings
(
Ypage 285)
RRestoring the factory settings
(
Ypage 286)
Instrument cluster submenu
Selecting the distance unit
The Display Unit Speed-/Odometer:
function allows you to choose whether cer-
tain displays appear in kilometers or miles in
the multifunction display.
XPress the =or; button on the steer-
ing wheel to select the Sett.
menu.
XPress the:or9 button to select the
Instrument Cluster
submenu.
XPress ato confirm.
XPress the :or9 button to select the
Display Unit Speed-/Odometer
func-
tion.
You will see the selected setting: km
or
miles
.
XPress the abutton to save the setting.
The selected unit of measurement for dis-
tance 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
RDISTRONIC PLUS
RASSYST PLUS service interval display
Selecting permanent display
Using the Permanent display:
function,
you can switch on the outside temperature or
the additional speedometer in the multifunc-
tion display.
XPress the =or; button on the steer-
ing wheel to select the Sett.
menu.
XPress the:or9 button to select the
Instrument Cluster
submenu.
XPress ato confirm.
XPress the :or9 button to select the
Permanent Display:
function.
The current selection outside tempera‐
ture,Dig. speedo [km/h]or Dig.
speedo [mph]appears.
Menus and submenus283
On-board computer and displays
Z