2012 MERCEDES-BENZ GL service

FunctionETrip computer menu (Y page 229)FTelephone menu (Y page 230)Standard display menu
Standard displayXPress the V or U button on the
steering wheel to select the standard
display.
Standard display
:Trip odometer;Odometer
You can select the following functions in the
Standard display menu using the & or
* button:
R tire pressure loss warning system
( Y page 345) (Canada only)
R tire pressure monitor ( Y page 347) (USA
only)
R coolant temperature ( Y page 220)
R digital speedometer or outside
temperature ( Y page 220)
R ASSYST PLUS service interval display
( Y page 305)
XTo reset the trip odometer: press and
hold the . reset button in the instrument
cluster until the trip odometer is reset.
Displaying the coolant temperature
GWARNING
Driving when your engine is overheated can
cause some fluids which may have leaked into
the engine compartment to catch fire. You
could be seriously burned.
Steam from an overheated engine can cause
serious burns which can occur just by opening
the engine hood. Stay away from the engine
if you see or hear steam coming from it.
Stop the vehicle in a safe location away from
other traffic. Turn off the engine, get out of the
vehicle and do not stand near the vehicle until
the engine has cooled down.XPress the V or U button on the
steering wheel to select the standard
display.XPress the & or * button to select the
coolant temperature.
Under normal driving conditions, with the
correct anti-corrosion and antifreeze additive
concentration, the reading may rise to
248 ‡(120 †).
! If the coolant temperature exceeds
248 ‡(120 †) do not continue driving. The
engine will otherwise be damaged.
Displaying the digital speedometer or
outside temperature
If you have selected the digital speedometer
for the status bar ( Y page 224), the outside
temperature is displayed here.
220Menus and submenusOn-board computer and displays

Telephone menu
Introduction
You can establish a Bluetooth ®
connection to
COMAND (see the separate operating
instructions).
GWARNING
A driver's attention to the road must always
be his/her primary focus when driving. For
your safety and the safety of others, we
recommend that you pull over to a safe
location and stop before placing or taking a
telephone call. If you choose to use the
telephone while driving, please use the hands-
free device and only use the telephone when
weather, road and traffic conditions permit.
Some jurisdictions prohibit the driver from
using a mobile phone while driving a vehicle.
Bear in mind that at a speed of just 30 mph
(approximately 50 km/h ), your vehicle is
covering a distance of 44 feet (approximately
14 m) every second.
XSwitch on the mobile phone and COMAND
(see the separate operating instructions).XPress the V or U button on the
steering wheel to select the Telephone
menu.
You will see one of the following display
messages in the multifunction display:
R Ready or the name of the network provider:
the mobile phone has found a network and
is ready to receive.
R No Service : no network is available, or the
mobile phone is searching for a network.
Accepting a call
If someone calls you when you are in the
Telephone menu, a display message appears
in the multifunction display, for example:
XPress the 6 button on the steering
wheel to accept an incoming call.
If you are not in the Telephone menu, you can
still accept a call.
Rejecting or ending a call
XPress the ~ button on the steering
wheel.
If you are not in the Telephone menu, you can
still accept a call.
Dialing a number from the phone book
You can enter new telephone numbers into
the phone book via the mobile phone (see the
separate operating instructions). If your
mobile phone is operational, you can select
and dial a number from the phone book at any
time.
XPress the V or U button on the
steering wheel to select the Telephone
menu.XPress the & or * button to select the
desired name.
To start scrolling rapidly, press and hold the
& or * button for longer than one
second.XPress 6 to start dialing.
or
XIf you do not want to make a call, press the
~ button.
Redialing
The on-board computer saves the last names
or numbers dialed in the redial memory.
230Menus and submenusOn-board computer and displays

Display messagesPossible causes/consequences and M SolutionsChild Seat In
Wrong Position
See Operator's
ManualGRisk of injury
Canada only: front-passenger seat with BabySmart™ air bag
deactivation system:
The BabySmart™ child seat is positioned incorrectly.
XInstall the child seat in the correct position.GRisk of injury
Canada only: front-passenger seat with BabySmart™ air bag
deactivation system:
The sensor for the air bag deactivation system is faulty.
XVisit a qualified specialist workshop.+
Restraint Sys.
Malfunction
Service RequiredGRisk of injury
There is a malfunction in the SRS (Supplemental Restraint
System).
XVisit a qualified specialist workshop immediately.GWARNING
In the event a malfunction of the SRS is indicated as outlined above, the SRS may not be
operational.
For your safety, we strongly recommend that you contact an authorized Mercedes-Benz Center
immediately to have the system checked. Otherwise the SRS may not be activated when needed
in an accident, which could result in serious or fatal injury, or it might deploy unexpectedly and
unnecessarily which could also result in injury.
Display messages237On-board computer and displaysZ

Display messagesPossible causes/consequences and M SolutionsÆ
Being lowered Max.
12 MPHThe vehicle is being lowered from off-road level 3 to off-road level
2. The display message informs you of the maximum speed
permissible for off-road level 3.XDo not drive faster than 12 mph (20 km/h) until off-road level 2
has been reached.8
Locking System
Inoperative
Service RequiredThe differential locks are defective.XDo not drive faster than 50 mph (80 km/h).XHave the vehicle checked at a qualified specialist workshop.8
Diff. Lock System
Overheated - Wait
briefly.The differential locks are too hot and have been disengaged.XDrive on carefully.XAllow the differential locks to cool down.
The differential locks reengage as soon as they have cooled
down.8
Stop vehicle,
engage parking
brakeA gearshift process has been canceled. LOW RANGE is in the
neutral position. There is no connection between the engine and
the drive wheels.XPull over and stop the vehicle safely as soon as possible, paying
attention to road and traffic conditions.XEngage the parking brake. Do not continue driving under any
circumstances.XRepeat the gearshift process.Å
Service Required
If parked engage
pk. brakeLOW RANGE is malfunctioning.XDo not drive faster than 50 mph (80 km/h).XEngage the parking brake to park.XHave the vehicle checked at a qualified specialist workshop.Å
Max. Speed 25 MPHYou have exceeded the maximum speed for the gearshift process.XDrive slower.
The gearshift process is carried out.Å
Max. Speed 40 MPHYou have exceeded the maximum speed for the gearshift process.XDrive slower.
The gearshift process is carried out.Å
Shift briefly into
NYou have reduced the vehicle speed, but the automatic
transmission is not in position N.XBriefly shift the automatic transmission to position N.Display messages249On-board computer and displaysZ

Display messagesPossible causes/consequences and M SolutionsDoor Open
Vehicle Not In ParkThe driver's door is open and the transmission is in position R, N
or D.XShift the transmission to position P.XEngage the parking brake.Drive to workshop
without shifting
gears.You cannot change the transmission position due to a malfunction.
If transmission position D is selected:XDrive to a qualified specialist workshop without shifting the
transmission from position D.
If transmission position R, N or P is selected:
XNotify a qualified specialist workshop or breakdown service.Only shift to P
when vehicle is at
a standstill.The vehicle is moving.XPull over and stop the vehicle safely as soon as possible, paying
attention to road and traffic conditions.XShift the transmission to position P.EGRisk of accident
The hood or the tailgate is open.
XPull over and stop the vehicle safely as soon as possible, paying
attention to road and traffic conditions.XEngage the parking brake.XClose the hood or tailgate.You have attempted to lock the vehicle with KEYLESS-GO while
the tailgate or door is open.XClose all the doors and/or the tailgate.;At least one door is open.XClose all the doors.D
Power Steering
Malfunction See
Operator's ManualGRisk of accident
The power steering assistance is defective.
You will need to use more force to steer.
XCheck whether you are able to apply the extra force required.XIf you are able to steer safely: carefully drive on to a qualified
specialist workshop.XIf you are unable to steer safely: do not drive on. Contact the
nearest qualified specialist workshop.Display messages255On-board computer and displaysZ

Display messagesPossible causes/consequences and M SolutionsNo ServiceYour vehicle is outside the network provider's transmitter/
receiver range.XWait until the mobile phone operational readiness symbol
appears in the multifunction display.~
Bluetooth readyThe Bluetooth ®
connection between your mobile phone and
COMAND is not activated.XIf desired, activate the Bluetooth ®
connection between your
mobile phone and COMAND (see the separate Operator's
Manual).¥
Top Up Washer FluidThe washer fluid level has dropped to approximately ⅓ of the total
reservoir capacity.XAdd washer fluid ( Y page 303).
SmartKey
Display messagesPossible causes/consequences and M Solutions+
Key Does Not
Belong to VehicleYou have put the wrong SmartKey in the ignition lock.XUse the correct SmartKey.+
Remove KeyThe SmartKey is in the ignition lock.XRemove the SmartKey.+
You need a new key.The SmartKey needs to be replaced.XVisit a qualified specialist workshop.+
Change Key
BatteriesThe batteries of the KEYLESS-GO key are discharged.XChange the batteries ( Y page 80).+
Don't Forget Your
KeyThe display message is shown for a maximum of 60 seconds and
is only a reminder.
You have opened the driver's door with the engine switched off.
The KEYLESS-GO key is not in the ignition lock.XRemember to take the KEYLESS-GO key with you when you
leave the vehicle.256Display messagesOn-board computer and displays

XSecure the roof carrier to roof rails :.XObserve the manufacturer's installation
instructions.
Cross bar
Points to observe before use
The maximum roof load that can be used with
additional accessories decreases by the dead
weight of the crossbars (13.7 lbs/6.2 kg).
! Note that installing the crossbar
increases the vehicle height by 50 mm
compared to the height stated in the
"Technical data" section.
The wrench and the Allen key are located with
the vehicle tool kit in the stowage space
underneath the trunk floor ( Y page 314).
i Replacement parts are available as
Mercedes-Benz accessories. Contact your
authorized Mercedes-Benz Service Center.
Installing the crossbars
GWARNING
Please follow these installation instructions
carefully. Caution should be exercised to
avoid damage to the vehicle while installing
the crossbars. Also, be careful not to injure
yourself or others while installing and
adjusting the crossbars or loading items on
them.
Each individual step of the installation
instructions, the warning notices, the general
safety precautions and the instructions for
use must be followed exactly. If the crossbars
are not mounted correctly, they and the
objects attached to them could come loose
from your vehicle and cause an accident,
thereby injuring you and other persons and/
or causing damage to property, including
damage to your vehicle.
GWARNING
Every time the crossbars are mounted, before
you set off on a journey and periodically
during longer journeys, check all the screws
on the crossbars to make sure that they are
secure, and tighten them if necessary. Repeat
these checks at regular intervals as road-
surface conditions dictate, and at least after
every 1500 miles (2500 km) of continuous
use.
Otherwise, the crossbars, mounted
accessories and the objects attached to them
could come loose from the vehicle causing an
accident, thereby injuring you and other
persons and/or causing damage to property,
including damage to your vehicle.
Do not use lubricant on the screws of the
crossbars. The screws could work loose and
the crossbars could become detached from
your vehicle, together with the objects
attached to them causing an accident,
thereby injuring you and other persons and/
or causing damage to property, including
damage to your vehicle.GWARNING
Only install the crossbars at the exact
locations designated on the roof rails. The
designated locations for the front crossbars
are between the markings engraved on the
inside of the roof rails. The designated
locations for the rear crossbars are between
the gaps on the roof rails.
Otherwise, the crossbars, mounted
accessories and the objects attached to them
could come loose from the vehicle causing an
accident, thereby injuring you and other
persons and/or causing damage to property,
including damage to your vehicle.
GWARNING
A roof load creates a greater surface area
exposed to the wind and causes the vehicle
to have a higher center of gravity, thereby
changing the vehicle's driving characteristics.
Accordingly, the additional weight on the roof
of the vehicle can have a detrimental effect
on braking, cornering and acceleration.
Never exceed the maximum permissible roof
load or the maximum permissible vehicle
278Stowage areasStowing and features

XPull out cover strip H from the groove until
bolts G become visible on both ends of the
crossbar.XTurn bolts G counter-clockwise on both
sides by approx. two turns.XPlace the crossbars on the marked points
on the roof rails.XEnsure that clamping bracket A locks
flush with the roof rails on both sides. If
necessary, pull it out or push it into
clamping brackets A.XTighten bolts G. Maintain a tightening
torque of 4 lb-ft (6 Nm) .
The width of the clamping bracket is set
correctly.GWARNING
Have the tightening torque checked after
mounting the crossbars. The screws could
come loose if they are not tightened to a
torque of 4 lb-ft (6 Nm).
XPress cover strip H into the groove of the
crossbar bit by bit.XInstall the crossbars as described
( Y page 278).
Removing the crossbars
:Key;Cover cap=Sticker FRONT (or REAR)?Bolt for clamping bracketAClamping bracketXUnlock cover cap ; with key :.XRemove cover cap ;.XTurn the bolts for clamping bracket A
counter-clockwise until the crossbars can
be removed from the roof rails.
Shortening the cover strip
The cover strips reduce the wind noise that is
caused by the crossbars. If additional roof
accessories are mounted, it may be
necessary to shorten the cover strips.
HCover stripXPull out cover strip H from the groove.XMount the roof accessories to the
crossbars.XPlace cover strip H flush with the roof
accessories and mark the end of the
crossbar on the cover strip.XCut off cover strip H at the marked point.XPress cover strip H into the groove of the
crossbar bit by bit.
i Cover strips are available as Mercedes-
Benz accessories. Contact your authorized
Mercedes-Benz Service Center.
Stowage areas281Stowing and featuresZ