2012 MERCEDES-BENZ GL SUV Owners Manual

X
Pull release knob :until the ball coupling
unloc ks.
The ball coupling folds down from under the
rea rbumper. The indicator lamp on the
release knob flashes.
i Do not attempt to spee dupthis process
by usin gyour foot to apply additional pres-
sure .Otherwise, the syste mmay sustain
mechanical damage. X
Press the ball coupling in the direction of
the arrow until it engages audibl ybehind
the bumper.
The indicator lam ponthe release knob
goes out and the message in the multifunc-
tion displa ydisappears. X
AMG vehicles and vehicles with AMG
bodystyling: attachhooks ;of cover =
in the direction of the arrow int oopen-
ings :intended for this purpose. X
AMG vehicle sand vehicles with AMG
bodystyling: push cover?upwards in the
direction of the arrow until it engages.
X AMG vehicles and vehicles with AMG
bodystyling: check that cover ?has been
atta ched correctly. Trailer powe
rsupply
! Youc an connect accessories with a
power rating of up to 240 Wtothe perma-
nen tpower supply and with apower rating
of up to 18 0Wto the powe rsupply that is
switched on via the ignition lock.
The trailer batter ymay not be charged from
the power supply.
When it leaves the factory, your vehicle's
trailer socket is equippe dwithapermanent
power supply and apower supply that is
switched on via the ignition lock.
The permanen tpower supply is supplied via
trailer socket pin 9.
The power supply that is switched on via the
ignition lock is supplied via trailer socket pin
10.
The trailer's permanen tpower supply is
switched off in the even toflow vehicle supply
voltage and after six hour satthe latest.
You can fin dmore information about fit ting
the trailer electric sataqualified specialist
workshop.
X To switch the connected power supply
on or off: turn the key in the ignition lock 262
Towin
gatrailerDriving an dparking

to position
2or 0respective ly
( Y page 159). Bulb fa
ilure indicato rfor LEDl amps
i If LED lamps ar efitted in the trai ler, an
error message ma yappea rinthe multi-
function display eve nifthere is no fault .The
reason for the err or message could be that
the curren thas fallen below the minimum
of 50 mA.
To ensur ereliable operation of the bulb failure
indicator, each LE Dchain in the trailer lighting
must be guaranteed aminimum curren tof
50 mA. Trailer wit
h7-pin connector
General notes Trailers with 7-pi
nconnector: you can
make aconnection to the 13 -pin connector
on the ball coupling using an adapter plug or,
if necessary, an adapter cable. Bot hcan be
obtained in aqualified specialist workshop.
Fitting the adapter !
Make sure that there is sufficien tcable
play so that the cable cannot become
detached when cor nering.
! Remove th einstalled adapter cable
before folding in the ball coupling. Other-
wise, damage may occur to the rear
bumpe rand the adapter cable. X
Ope nthe socket cover.
X Inser tconnector with lug :into
groove ;of the socket. Tur nthe connec-
tor cloc kwise to the stop.
X Let the cover engage.
X If you are using an adapter cable, secure
the cable to the trailer with cable ties. Towing
atrailer
263Driving an dparking Z

Problems wit
htrailer towing Problem Possible causes/consequences and
M Solutions
The released ball cou-
pling cannot be
engaged. X
Visit aqualified specialist workshop. The ball coupling does
not unlock, even
though:
R
the vehicle is station-
ary
R no trailer cable is
connected
R the release knob to
unlock the ball cou-
pling has been pulled
for more than asec-
ond. The on-boar
dvoltage is insufficient.
X Start the engine.
If the ball coupling still does not unlock:
X Visit aqualified specialist workshop. 264
Towin
gatrailerDriving an dparking

Usefu
linfor mation ............................ 266
Important safet ynotes .................... 266
Displays and oper ation .................... 267
Menu sand submenus ...................... 271
Displa ymessages ............................. 290
Wa rning and indicator lamp sinthe
instrumen tcluster ............................ 324 265On-boar
dcomputer and displays

Usefu
linfor mati on
i This Owner's Manual describes all mod-
els, series and optional equipment for your
vehicle that were available at the time of
going to press. National variation sare pos-
sible. Note that your vehicl emay not be
equippe dwith all of the function sdescri-
bed. This is also the case for system sand
functions relevant to safety.
i Read the information on qualified special-
ist workshops: (Y page25). Impo
rtantsafety notes G
WARNING
Onl yuse the on-boar dcompu terw hen road
and traffic condition spermit .You would oth-
erwise be distracted and unable to concen-
trate properly on driving, and coul dcause an
accident. G
WARNING
No message swill be displayed if either the
instrument cluster or the multifunction dis-
play is inoperative.
As aresult, you will not be able to see infor-
mation about your driving conditions, such as
speed, outside temperature, warning and indi-
cator lamps, display messages or system fail-
ures. Drivin gcharacteristic smay be impaired.
Adjust your driving style and vehicle speed
accordingly.
Contact aqualified specialist workshop
immediately. G
WARNING
The on-board computer only records and dis-
plays malfunctions and warnings from certain
systems. For this reason, you should always
make sure that your vehicle is safe to use. You
could otherwis ecause an accident by driving
an unsafe vehicle. G
WARNING
The operating safety of your vehicle could be
impaired if maintenance work is carried out
incorrectly. This could cause you to lose con-
trol of your vehicle and cause an accident.
Moreover, the safety systems may no longer
be able to protect you or others as they are
designed to do.
Always have service work carried out at a
qualified specialis tworkshop.
For an illustration of the instrumen tcluster,
see (Y page 30). 266
Important safety notesOn-board computer and displays

Display
sand operation In
strument clu ster Instrument clu
ster: kilometres
: Speedometer wit hsegments (Y page 268)
; Fue lgauge
= Rev counter (Y page 268)
? Coolant temperature (Y page 268)
A Multifunction display (Y page 270)
B Instrumen tcluster lightin g(Ypage 26 8) Instrument cluster: miles
:
Speedometer with segments (Y page 268)
; Fue lgauge Display
sand ope ration
267On-board computer and displays Z

=
Rev coun ter( Ypage 268)
? Coolan ttemperatur e(Ypage 26 8)
A Multifunction displa y(Ypage 27 0)
B Instrumen tcluster lighting (Y page 268) Instrument cluster lighting
The lighting in the instrument cluster ,inthe
displays and the controls in the vehicle inte-
rior can be adjusted usin gthe brightness con-
trol knob.
The brightness control knob is on the bottom
lef toft he instrumen tcluster (Y page 30).
X Turn the brightness control knob clockwise
or anti-clockwise.
If the light switch is set to Ã,Tor
L,t he brightness is dependant upon
the brightness of the ambient light.
i The light sensor in the instrumen tcluster
automatically controls the brightness of
the multifunction display.
In daylight, the displays in the instrument
cluster are not illuminated. Coolant temperature gauge
The coolant temperature gauge is in the
instrument cluster on the right-hand side
(Y page 30).
Under normal operatin gcondition sand with
the specified coolant level ,the coolant tem-
perature ma yrise to 120 †.
At high outside temperatures and when driv-
ing uphill, the coolant temperature may rise
to the end of the scale. Rev counter
! Do not drive in the overrevving range.
Doin gsow ill damage the engine.
The red band in the rev counter indicates the
engine's overrevving range. The fuel supply is interrupted to protec
tthe
engin ewhen the red band is reached. Outside tem
perature display G
WARNING
At temperatures just above freezing point, the
street may be icy, especially in wooded areas
or on bridges. If you do not adapt your driving
style to the conditio ns,the vehicle coul dskid.
For this reason, adapt your driving style and
speed to the weather conditions.
The outside temperature displa yisinthe mul-
tifunc tion display (Y page 270).
Changes in the outside temperatur eare dis-
played afte rashort delay. Speedomete
rwith segments
The segments in the speedometer indicate
which speed range is avai lable.
R Cruise control activated (Y page 193):
The segment slight up from the stored
speed to the maximum speed.
R Variabl eSPEEDTRONIC activated
(Y page 196):
The segments light up from the star tofthe
scal etot he selected limit speed.
R DISTRONI CPLUS activate d(Ypage 198):
One or two segment sinthe set speed
range light up.
R DISTRONI CPLUS detects avehicle in front:
The segments between the speed of the
vehicle in fron tand the store dspeed light
up. 268
Display
sand operationOn-board computer and displays

Oper
ating the on-board compu ter
Overview :
Multifunction display
; Swit ches on LINGU ATRONIC; see the sep-
arate operating instructions
= Right control panel
? Left control panel
A Back button
X To activate the on-board computer: turn
the key to position 1in the ignitio nlock.
You can control the multifunction display and
the settings in the on-boar dcompu teru sing
the button sonthe multifunction steering
wheel. Lef
tcontrol panel =
; R
Calls up the menu and menu bar 9
:
Press briefly:
R
Scrolls through lists
R Select sasubmenu or function
R In the Audio menu: select
sa
stored station, an audi otrack or
av ideo scene
R In the Tel (telephone) menu:
switches to th ephon ebook and
selects anam eo rtele phone
number 9
:
Press and hold:
R In the Audio menu: sele
ctst he
previous/next statio norselects
an audio trac koravideoscene
using rapi dscrolling
R In the Tel (Te
lephone) menu:
starts rapid scrolling if the phone
book is open a R
Confirm sselection/display mes-
sage
R In the Tel (telephone) menu:
switches to the telephone book
and starts dialling the selected
number
R In the Audio menu: stops the
station searc hfunction at the
desired station Right control panel
~ R
Rejects or ends acall
R Exits telephone book/redial
memory 6 R
Makes or accepts acall
R Switches to the redial memory Displays and operation
269On-board computer and displays Z