2014 MERCEDES-BENZ GL cooling

1, 2, 3 ...
115 V socket...................................... 353
12 V socket
see Sockets
360° camera
Cleaning .........................................380
Function/notes.............................235
4ETS (Electronic Traction System)....72
4MATIC (permanent four-wheel
drive)..................................................256
A
ABS (Anti-lock Braking System)
Display message............................291
Function/notes ................................ 67
Important safety notes....................67
Warning lamp ................................. 327
Activating/deactivating cooling
with air dehumidification.................155
Active Blind Spot Assist
Activating/deactivating (on-
board computer)............................281
Display message............................314
Function/information....................247
Trailer towing.................................250
Active Curve System
Display message............................311
Function/notes.............................218
Active Driving Assistance package.247
Active Lane Keeping Assist
Activating/deactivating (on-
board computer)............................282
Display message............................313
Function/information....................251
Trailer towing.................................253
Active light function.........................133
Active Parking Assist
Display message............................314
Exiting a parking space..................229
Function/notes.............................226
Important safety notes..................226
Parking..........................................228
Towing a trailer..............................230
ADAPTIVE BRAKE................................. 75
Adaptive Brake Assist
Display message............................298
Function/notes ................................ 71
Adaptive Highbeam Assist
Display message............................306
Function/notes.............................134
Switching on/off...........................134
Additives (engine oil)........................450
ADS (Adaptive Damping System)
Function/notes.............................217
Air bags
Display message............................301
Front air bag (driver, front
passenger).......................................46
Important safety notes....................44
Knee bag .......................................... 47
PASSENGER AIR BAG OFF
indicator lamp..................................49
Safety guidelines.............................43
Side impact air bag..........................47
Window curtain air bag....................48
Air-conditioning system
see Climate control
Air filter (display message)..............309
AIR FLOW...........................................157
AIRMATIC package
ADS (Adaptive Damping System)...217
Function/notes.............................217
Level control..................................218
Air vents
Glove box .......................................163
Important safety notes..................162
Rear...............................................163
Setting...........................................162
Setting the center air vents...........162
Setting the side air vents...............163
Alarm
ATA (Anti-Theft Alarm system).........77
Switching off (ATA)..........................77
Switching the function on/off
(ATA)................................................77
Alarm system
see ATA (Anti-Theft Alarm system)
Ambient lighting
Setting the brightness (on-board
computer)......................................283
Setting the color (on-board
computer)......................................283
4Index

Central locking
Automatic locking (on-board
computer)......................................284
Locking/unlocking (SmartKey)........80
Changing bulbs
Brake lamps...................................140
High-beam headlamps...................139
Low-beam headlamps....................138
Child-proof locks
Important safety notes....................65
Rear doors.......................................66
Children
In the vehicle...................................60
Restraint systems............................60
Special seat belt retractor...............63
Child seat
LATCH-type (ISOFIX) child seat
anchors ............................................ 63
Top Tether.......................................64
Cigarette lighter................................352
Cleaning
Mirror turn signal...........................380
Trailer tow hitch.............................381
Climate control
3-zone automatic climate control
with additional rear-compartment
climate control ............................... 152
Automatic climate control (3-zone) 150
Controlling automatically...............156
Cooling with air dehumidification..155
Defrosting the windows.................160
Defrosting the windshield..............159
Dual-zone automatic climate
control...........................................147
Important safety notes..................146
Indicator lamp ................................ 156
Information about using 3-zone
automatic climate control..............154
Maximum cooling..........................159
Notes on using dual-zone
automatic climate control..............149
Overview of systems......................146
Problems with cooling with air
dehumidification............................156
Problem with the rear window
defroster........................................161
Rear control panel.........................150
Rear control panel (3-zone
automatic climate control with
additional rear-compartment
climate control).............................152
Refrigerant.....................................452
Refrigerant filling capacity.............452
Setting the air distribution.............158
Setting the airflow.........................158
Setting the air vents......................162
Setting the climate mode (AIR
FLOW)............................................157
Setting the temperature................157
Switching air-recirculation mode
on/off............................................161
Switching on/off...........................154
Switching residual heat on/off......161
Switching the rear window
defroster on/off............................160
Switching the ZONE function on/
off..................................................159
Coat hooks.........................................347
Cockpit
Overview..........................................32
see Instrument cluster
COLLISION PREVENTION ASSIST
Operation/notes..............................69
COMAND
ON&OFFROAD menu.....................262
see separate operating instructions
COMAND display
Cleaning ......................................... 381
Combination switch..........................131
Consumption statistics (on-board
computer)..........................................275
Convenience closing feature..............95
Convenience opening feature............95
Coolant (engine)
Checking the level.........................373
Display message............................306
Filling capacity...............................451
Important safety notes..................450
Temperature (on-board computer).287
Temperature gauge ........................ 272
Warning lamp ................................. 334
Cooling
see Climate control
Copyright.............................................30
Index7

Useful information
iThis 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.
iRead the information on qualified
specialist workshops: (Ypage 28).
Overview of climate control systems
Important safety notes
Observe the settings recommended on the
following pages. The windows could
otherwise fog up.
To prevent the windows from fogging up:
Rswitch off climate control only briefly
Rswitch on air-recirculation mode only
briefly
Rswitch on the cooling with air
dehumidification function
Rswitch on the defrost windshield function
briefly, if required
Climate control regulates the temperature
and the humidity in the vehicle interior and
filters undesirable substances out of the air.
Climate control can only be operated when
the engine is running. Optimum operation is
only achieved with the side windows and roof
closed.
The residual heat function can only be
activated or deactivated with the ignition
switched off (Ypage 161).
iVentilate the vehicle for a brief period
during warm weather, e.g. using the
convenience opening feature (Ypage 95).
This will speed up the cooling process and
the desired interior temperature will be
reached more quickly.
iThe integrated filter filters out most
particles of dust and soot and completely
filters out pollen. It also reduces gaseous
pollutants and odors. A clogged filter
reduces the amount of air supplied to the
vehicle interior. For this reason, you should
always observe the interval for replacing
the filter, which is specified in the
Maintenance Booklet. As it depends on
environmental conditions, e.g. heavy air
pollution, the interval may be shorter than
stated in the Maintenance Booklet.
iIt is possible that the residual heat
function may be activated automatically an
hour after the SmartKey has been removed
in order to dry the automatic climate
control. The vehicle is then ventilated for
30 minutes.
146Overview of climate control systems
Climate control

Activating/deactivating
XTurn the SmartKey to position2in the
ignition lock (Ypage 167).
XTo activate:press theXbutton.
The indicator lamp in theXbutton lights
up. Airflow and air distribution are set to
automatic mode.
or
XPress thexbutton.
The indicator lamp in thexbutton goes
out. The previously selected settings are
restored.
XTo deactivate:press thexbutton.
The indicator lamp in thexbutton lights
up.
Activating/deactivating cooling with
air dehumidification
General notes
If you deactivate the "Cooling with air-
dehumidification" function, the air inside the
vehicle will not be cooled. The air inside the
vehicle will also not be dehumidified. The
windows can fog up more quickly. Therefore,
only deactivate the "Cooling with air-
dehumidification" function briefly.
The "Cooling with air dehumidification"
function is only available when the engine is
running. The air inside the vehicle is cooled
and dehumidified according to the
temperature selected.
Condensation may drip from the underside of
the vehicle when it is in cooling mode. This is
normal and not a sign that there is a
malfunction.
Activating/deactivating
Example:Zbutton
XTo activate:press theZ/Vbutton.
The indicator lamp in theZ/V
button lights up.
XTo deactivate:press theZ/V
button.
The indicator lamp in theZ/V
button goes out. The "Cooling with air
dehumidification" function has a delayed
switch-off feature.
Operating the climate control systems155
Climate cont rol

Problems with the "Cooling with air dehumidification" function
ProblemPossible causes/consequences andPPSolutions
The indicator lamp in
theZ/Vbutton
flashes three times or
remains off. The
"Cooling with air
dehumidification"
function cannot be
switched on.
Cooling with air dehumidification has been deactivated due to a
malfunction.
XVisit a qualified specialist workshop.
Setting climate control to automatic
General notes
If you deactivate the "Cooling with air-
dehumidification" function, the air inside the
vehicle will not be cooled. The air inside the
vehicle will also not be dehumidified. The
windows can fog up more quickly. Therefore,
only deactivate the "Cooling with air-
dehumidification" function briefly.
In automatic mode, the set temperature is
maintained automatically at a constant level.
The system automatically regulates the
temperature of the dispensed air, the airflow
and the air distribution.
Automatic mode will achieve optimal
operation if cooling with air dehumidification
is also activated. If necessary, cooling with air
dehumidification can be deactivated.
In the rear compartment, you can also switch
climate control for the rear seats to automatic
mode using theXbutton.
Activating/switching
XTurn the SmartKey to position2in the
ignition lock (Ypage 167).
XSet the desired temperature.
XTo activate:press theXbutton.
The indicator lamp in theXbutton lights
up. Automatic air distribution and airflow
are activated.
XTo switch to manual mode:press the

Problems with the 115 V power socket
ProblemPossible causes/consequences andPPSolutions
The warning lamp on
the 115 V power socket
is not lit.
The on-board voltage is too low because the battery is too weak.
XStart the engine.
or
XCharge the battery (Ypage 394).
If the indicator lamp still does not light up:
XVisit a qualified specialist workshop.
The temperature of the DC/AC converter is temporarily too high.
XRemove the electronic device connector from the 115 V socket.
XLet the DC/AC converter cool down.
If the indicator lamp still does not light up after cooling down the
converter:
XVisit a qualified specialist workshop.
You have connected an electronic device that has a constant
nominal power of less than 150 watts, but a very high switch-on
current. This device will not work. If you connect such a device,
the 115 V power socket will not supply it with power.
XConnect a suitable device.
mbrace
General notes
You must have a license agreement to
activate the mbrace service. Make sure that
your system is activated and operational. To
log in, press the

Example: engine oil capXTurn capCcounter-clockwise and remove
it.
XAdd engine oil.
If the oil level is at or below the MIN mark
on the oil dipstick, add 1.1 US qt (1.0 l) of
engine oil.
XReplace capCon the filler neck and turn
clockwise.
Ensure that the cap locks into place
securely.
XCheck the oil level again with the oil
dipstick (Ypage 371).
Further information on engine oil
(Ypage 449).
Additional service products
Checking coolant level
GWARNING
Certain components in the engine
compartment, such as the engine, radiator
and parts of the exhaust system, can become
very hot. Working in the engine compartment
poses a risk of injury.
Where possible, let the engine cool down and
touch only the components described in the
following.
GWARNING
The engine cooling system is pressurized,
particularly when the engine is warm. When
opening the cap, you could be scalded by hot
coolant spraying out. There is a risk of injury.
Let the engine cool down before opening the
cap. Wear eye and hand protection when
opening the cap. Open the cap slowly half a
turn to allow pressure to escape.
XPark the vehicle on a level surface.
Only check the coolant level when the
vehicle is on a level surface and the engine
has cooled down.
XTurn the SmartKey to position2in the
ignition lock (Ypage 167).
On vehicles with KEYLESS-GO, press the
Start/Stop button twice (Ypage 167).
XCheck the coolant temperature gauge in
the multifunction display.
The coolant temperature must be below
158 ‡ (70 †).
XTurn the SmartKey to position
0(Ypage 167) in the ignition lock.
XSlowly turn capChalf a turn counter-
clockwise to allow excess pressure to
escape.
XTurn capCfurther counter-clockwise and
remove it.
If the coolant is at the level of marker bar

Further information on coolants can be
found in the Mercedes-Benz Specifications
for Service Products, MB Specifications for
Service Products 310.1, e.g. on the
Internet at
http://bevo.mercedes-benz.com. Or
contact a qualified specialist workshop.
!Always use a suitable coolant mixture,
even in countries where high temperatures
prevail.
Otherwise, the engine cooling system is not
sufficiently protected from corrosion and
overheating.
iHave the coolant regularly replaced at a
qualified specialist workshop and the
replacement confirmed in the Maintenance
Booklet.
Comply with the important safety precautions
for service products when handling coolant
(Ypage 445).
The coolant is a mixture of water and
antifreeze/corrosion inhibitor. It performs
the following tasks:
Rcorrosion protection
Rantifreeze protection
Rraising the boiling point
If the coolant has antifreeze protection down
to -35 ‡ (-37†),the boiling point of the
coolant during operation is approximately
266‡ (130 †).
The antifreeze/corrosion inhibitor
concentration in the engine cooling system
should:
Rbe at least 50%. This will protect the engine
cooling system against freezing down to
approximately -35‡ (-37 †).
Rnot exceed 55% (antifreeze protection
down to -49‡ [-45 †]). Otherwise, heat
will not be dissipated as effectively.
Mercedes-Benz recommends an antifreeze/
corrosion inhibitor concentrate in
accordance with
MB Specifications for Service Products 310.1.
iWhen the vehicle is first delivered, it is
filled with a coolant mixture that ensures
adequate antifreeze and corrosion
protection.
iThe coolant is checked with every
maintenance interval at a qualified
specialist workshop.
Filling capacities
ModelCapacity
GL 450 4MATIC
GL 550 4MATIC
Approx. 11.6 US qt
(11.0 l)
GL 350 BlueTEC 4
MATIC
Approx. 12.2 US qt
(11.5 l)
AMG vehiclesApprox. 13.1 US qt
(12.4 l)
iUse MB 325.0 or MB 326.0 corrosion
inhibitor/antifreeze.
Windshield washer system
Important safety notes
GWARNING
Windshield washer concentrate is highly
flammable. If it comes into contact with hot
engine components or the exhaust system it
could ignite. There is a risk of fire and injury.
Make sure that no windshield washer
concentrate is spilled next to the filler neck.
!Do not add distilled or de-ionized water to
the washer fluid container. Otherwise, the
level sensor may be damaged.
!Only MB SummerFit and MB WinterFit
washer fluid should be mixed together. The
spray nozzles may otherwise become
blocked.
When handling washer fluid, observe the
important safety notes on service products
(Ypage 445).
Service products and filling capacities451
Technical data
Z