warning MERCEDES-BENZ GL 2012 Owners Manual

driving without one. Avoid sudden steering
movements.
R The vehicle/trailer combination is heavier,
accelerates more slowly, has a decreased
gradient climbing capability and a longer
braking distance.
It is more susceptible to side winds and
requires more careful steering.
R If possible, avoid abrupt braking. Depress
the brake pedal moderately at first, so that
the trailer can activate its own brakes. Then
increase the pressure on the brake pedal.
R If the automatic transmission continues to
shift back and forth between two gears
when driving up or downhill, restrict the
shift range. Select shift range 4, 3, 2, or 1.
A lower gear and lower speed reduce the
risk of engine failure.
R On long and steep gradients that are
difficult to drive down in shift range 1,
switch to the off-road drive program or
engage the LOW RANGE off-road gear.
R When driving downhill, shift to a lower gear
to utilize the engine's braking effect.
Avoid continuous brake application as this
may overheat the vehicle brakes and, if
installed, the trailer brakes.
R If the coolant temperature increases
dramatically while the air-conditioning
system is switched on, switch off the air-
conditioning system.
Coolant heat can additionally be dissipated
by opening the windows and by setting the
blower fan and the interior temperature to
maximum.
R When overtaking, pay particular attention
to the extended length of your vehicle/
trailer combination.
Due to the length of your vehicle/trailer
combination, you will have to travel an
additional distance beyond the vehicle you
are overtaking before returning to the
previous lane.Decoupling a trailerGWARNING
While you are coupling or decoupling a trailer,
make sure nobody locks or unlocks the
vehicle and/or opens or closes doors or the
tailgate.
The vehicle's level could change and you
could endanger yourself and/or others as a
result.
Make sure that you do not operate the ADS
button or the vehicle level control system
when coupling/decoupling the trailer.
XMake sure that the automatic transmission
is set to position P.XApply the vehicle's parking brake.XStart the engine.XClose all doors and the tailgate.XApply the trailer's parking brake.GWARNING
As soon as you disconnect the electrical
connection between the trailer and the
vehicle, the vehicle will lower. To help avoid
personal injury, make sure no one is near the
wheel housing or underneath the vehicle
before the electrical connection is
disconnected.
When you decouple the trailer, the vehicle is
temporarily raised because the springs are
relieved of load. Be especially careful during
this process, as you could otherwise injure
yourself and/or others. Make sure that any
persons remaining in the vehicle do not press
the switches for vehicle level control or the
ADS.
XRemove the trailer cable and decouple the
trailer.XSwitch off the engine.212Trailer towingDriving and parking

Useful information ............................216
Important safety notes ....................216
Displays and operation ....................216
Menus and submenus ......................219
Display messages ............................. 232
Warning and indicator lamps in the
instrument cluster ............................258215On-board computer and displays

Useful information
i This Operator's Manual describes all
models and all standard and optional
equipment 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.
i Please read the information on qualified
specialist workshops ( Y page 24).
Important safety notes
You will find an illustration of the instrument
cluster in the "At a glance" section
( Y page 29).
GWARNING
A driver's attention to the road and traffic
conditions must always be his/her primary
focus when driving.
For your safety and the safety of others,
selecting features through the multifunction
steering wheel should only be done by the
driver when traffic and road conditions permit
it to be done safely.
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.
GWARNING
No messages will be displayed if either the
instrument cluster or the multifunction
display is inoperative.
As a result, you will not be able to see
information about your driving conditions,
such as
R speed
R outside temperature
R warning/indicator lamps
Rmalfunction/warning messages
R failure of any systems
Driving characteristics may be impaired.
If you must continue to drive, do so with added
caution. Contact an authorized Mercedes-
Benz Center as soon as possible.GWARNING
Malfunction and warning messages are only
indicated for certain systems and are
intentionally not very detailed. The
malfunction and warning messages are
simply a reminder with respect to the
operation of certain systems. They do not
replace the owner's and/or driver's
responsibility to maintain the vehicle's
operating safety. Have all required
maintenance and safety checks performed on
the vehicle. Bring the vehicle to an authorized
Mercedes-Benz Center to address the
malfunction and warning messages.
Displays and operation
Tachometer
The red band in the tachometer indicates the
engine's overrevving range.
! Do not drive in the overrevving range, as
this could damage the engine.
The fuel supply is interrupted to protect the
engine when the red band is reached.
Outside temperature display
The outside temperature display is in the
multifunction display ( Y page 218).
GWARNING
The outside temperature indicator is not
designed to serve as an ice-warning device
and is therefore unsuitable for that purpose.
Indicated temperatures just above the
freezing point do not guarantee that the road
216Displays and operationOn-board computer and displays

Menus and submenus
Menu overview
The number of menus shown depends on the optional equipment in the vehicle.
Function:Standard display menu (Y page 220)
R tire pressure loss warning system (Canada only) ( Y page 345)
R tire pressure monitor (USA only) ( Y page 347)
R ASSYST PLUS service interval display ( Y page 305);Audio menu ( Y page 221)=Navigation menu (Y page 222)?Offroad menu (Y page 222)
R Level control ( Y page 189)
R Compass display ( Y page 296)
R Differential locks (status indicator) ( Y page 208)ADISTRONIC menu (Y page 187)BMessage memory 24
menu ( Y page 232)CSettings menu (Y page 223)DAdditional functions menu (Y page 228)24
The menu is only visible if there is a display message.Menus and submenus219On-board computer and displaysZ

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

XPress the V or U button on the
steering wheel to select the Settings
menu.XPress the & button to call up the
selection of submenus.XPress the W or X button to select the
Vehicle submenu.XPress the & button to select Acoustic
Lock Feedback .XPress the W or X button to switch
the Acoustic Lock Feedback function on
or off.XPress the &, V or U button to
select a different display.
Activating/deactivating the radar sensor
system
If the radar sensor system is switched off,
Blind Spot Assist (Y page 201) is deactivated.
i USA only: This device has been approved
by the FCC as a "Vehicular Radar System".
The radar sensor is intended for use in an
automotive radar system only. Removal,
tampering, or altering of the device will void
any warranties, and is not permitted by the
FCC. Do not tamper with, alter, or use in
any nonapproved way.
Any unauthorized modification to this
device could void the user's authority to
operate the equipment.
i Canada only:
This device complies with RSS-210 of
Industry Canada. Operation is subject to
the following two conditions:
1. This device may not cause harmful
interference, and
2. this device must accept any interference
received, including interference that may
cause undesired operation.
Any unauthorized modification to this
device could void the user's authority to
operate the equipment.
XPress the V or U button on the
steering wheel to select the Settings
menu.XPress the & button to select submenus.XPress the W or X button to select the
Vehicle submenu.XPress the & button to select Radar
Sensor (See Operator's Manual) .XPress the W or X button to activate
or deactivate the Radar Sensor (see
Operator's Manual) .XPress the &, V or U button to
select a different display.
Convenience
Activating/deactivating the EASY-
ENTRY/EXIT feature
You can use the Easy-entry Function to
activate or deactivate the EASY-ENTRY/EXIT
feature ( Y page 111).
GWARNING
You must make sure no one can become
trapped or injured by the moving steering
wheel when the easy-entry/exit feature is
activated.
To stop steering wheel movement do one of
the following:
R Move steering wheel adjustment stalk.
R Press one of the memory position buttons.
R Press memory button M.
Do not leave children unattended in the
vehicle, or with access to an unlocked vehicle.
Children could open the driver's door and
unintentionally activate the easy-entry/exit
feature, which could result in an accident
and/or serious personal injury.
XPress the V or U button on the
steering wheel to select the Settings
menu.XPress the & button to select submenus.XPress the W or X button to select the
Comfort submenu.Menus and submenus227On-board computer and displaysZ

XPress the & button to select Easy-
entry Function .XPress the W or X button to activate
or deactivate the Easy-entry Function .XPress the &, V or U button to
select a different display.
Switching the belt adjustment on/off
For further information on belt adjustment
( Y page 58).
XPress the V or U button on the
steering wheel to select the Settings
menu.XPress the & button to select submenus.XPress the W or X button to select the
Comfort submenu.XPress the & button to select Belt
Adjustment .XPress the W or X button to activate
or deactivate Belt Adjustment .XPress the &, V or U button to
select a different display.
Switching the Fold in mirrors when
locking function on/off
If you activate the Fold In Mirrors When
Locking function, the exterior mirrors are
folded in when the vehicle is locked. If you
switch on the ignition, the exterior mirrors
fold out again.
If you have switched the function on and you
fold the exterior mirrors in using the button
on the door ( Y page 112), they will not fold
out automatically. The exterior mirrors can
then only be folded out using the button on
the door.
XPress V or U on the steering wheel
to select the Settings menu.XPress the & button to select submenus.XPress the W or X button to select the
Convenience submenu.XPress & to select Fold In Mirrors
When Locking .XPress W or X to activate/deactivate
the Fold Mirrors In When Locking
function.XPress the &, V or U button to
select a different display.
Additional functions menu
Activating/deactivating the distance
warning function
This function is only available with
DISTRONIC.
XPress V or U on the steering wheel
to select the Additional functions menu.XPress the & or * button to select the
Distance warning function.XPress the W or X button to activate
or deactivate the Distance warning
system.
When the distance warning function
( Y page 72) is activated, the Ä symbol
is shown in the lower multifunction display.XPress the &, V or U button to
select a different display.
Activating/deactivating Blind Spot
Assist
Further information about Blind Spot Assist
( Y page 201).
XPress V or U on the steering wheel
to select the Additional functions menu.XPress the & or * button to select the
Blind Spot Assist function.XPress the W or X button to switch
Blind Spot Assist on or off.XPress the &, V or U button to
select a different display.
Setting DSR
With the DSR speed function, you can set the
speed of DSR (the speed for driving downhill)
( Y page 204) to a value between 3 mph
228Menus 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 messages
General information
GWARNING
All categories of messages contain important information which should be taken note of and,
where a malfunction is indicated, addressed as soon as possible at an authorized Mercedes-Benz
Center.
Failure to repair the condition noted may cause damage not covered by the Mercedes-Benz
Limited Warranty, or result in property damage or personal injury.
Display messages appear in the multifunction display.
Display messages with graphic displays may be shown in simplified form in the Operator's
Manual and may differ from the messages shown in the multifunction display.
Please respond in accordance with the display messages and follow the additional notes in
this Operator's Manual.
Certain display messages are accompanied by an audible warning tone or a continuous tone.
Hiding display messages
You can hide some display messages with a low priority.
XPress the V, U , & or * button on the steering wheel to select another display.
or
XPress the . reset button on the instrument cluster ( Y page 29).
The display message is cleared.
Display messages with a high priority are shown in red.
You cannot hide display messages of the highest priority. The multifunction display shows
these messages continuously until the causes for the messages have been remedied.
Message memory menu
The on-board computer saves certain display messages. You can call up the display messages
in the message memory menu.
The message memory menu is only shown if any display messages have been stored.
XPress the V or U button repeatedly, until either the original menu or the message
memory menu is shown.
If there are display messages, the multifunction display shows, for example, 2 Messages.XPress the & or * button to scroll through the display messages.
When the ignition is switched off, all display messages are deleted apart from some high-
priority display messages. Once the causes of the high-priority display messages have been
rectified, the corresponding display messages are also deleted.
232Display messagesOn-board computer and displays

Safety systemsDisplay messagesPossible causes/consequences and M Solutions!÷
Unavailable See
Operator's ManualGRisk of accident
ABS (Anti-lock Braking System), ESP ®
(Electronic Stability
Program), BAS (Brake Assist), PRE-SAFE ®
, hill start assist and
ESP ®
trailer stabilization are temporarily not available.
In addition, the ÷, å and ! warning lamps light up in
the instrument cluster.
The self-diagnosis function might not be complete, for example.
The brake system continues to function normally, but without the
functions listed above. The wheels could therefore lock if you
brake hard, for example.
XCarefully drive a suitable distance making slight steering
movements at a speed above 12 mph (20 km/h).
If the display message disappears, the functions mentioned
above are available again.
If the display message continues to be displayed:
XDrive on carefully.XVisit a qualified specialist workshop.GRisk of accident
ABS, ESP ®
, BAS, PRE-SAFE ®
, hill start assist and ESP ®
trailer
stabilization are temporarily not available.
In addition, the ÷, å and ! warning lamps light up in
the instrument cluster.
For example, the on-board voltage may be insufficient.
The brake system continues to function normally, but without the
functions listed above. The wheels could therefore lock if you
brake hard, for example.
XDrive on carefully.
If the display message disappears, the functions mentioned
above are available again.
If the display message continues to be displayed:
XDrive on carefully.XVisit a qualified specialist workshop.Display messages233On-board computer and displaysZ