2010 MERCEDES-BENZ GL450 Operating temperature

Selecting display (digital speedometer or
outside temperature) for status indicator
XPress button V or U repeatedly until
the Settings menu appears in the
multifunction display.
XPress button &.XMove the selection marker with button
W or X to the Instrument
Cluster submenu.
XPress button & or * repeatedly until
the message Status Line Display
appears in the multifunction display.
The selection marker is on the current
setting.
XPress button W or X to select the
desired setting.
The selected display is then shown
continuously in the status indicator (lower
display).
The other display now appears in the
Standard display menu (Y page 128).
Time/Date submenu
Access the Time/Date submenu via the
Settings menu. Use the Time/Date
submenu to change the time and date display
settings.
The following functions are available:
RSetting the time (Y page 135)
RSetting the date (Y page 135)
If your vehicle is equipped with the COMAND
system and navigation module, see separate
COMAND system operating instructions for
information on how to set the time and date.
Setting the time
This function is not available if your vehicle is
equipped with the COMAND system and
navigation module.
XPress button V or U repeatedly until
the Settings menu appears in the
multifunction display.
XPress button &.XMove the selection marker with button
W or X to the Time/Date submenu.
XPress button & or * repeatedly until
the message Clock Set Hour or Clock
Set Minute(s) appears in the
multifunction display.
The selection marker is on the current
setting.
Example illustration for setting the hour
XPress button W or X to set the hours
or minute(s).
Setting the date
This function is not available if your vehicle is
equipped with the COMAND system and
navigation module.
XPress button V or U repeatedly until
the Settings menu appears in the
multifunction display.
XPress button &.XMove the selection marker with button
W or X to the Time/Date submenu.
XPress button & or * repeatedly until
the message Date Set Month, Date Set
Day, or Date Set Year appears in the
multifunction display.
The selection marker is on the current
setting.
Control system135Controls in detailX164_AKB; 5; 31, en-USd2ureepe,Version: 2.11.8.12009-09-11T12:30:16+02:00 - Seite 135Z

Overview of climate control system functions and air vents
Your vehicle is equipped with either of the following climate control systems:
Climate control (Y page 175)3-zone automatic climate control
USA only (Y page 181)
Canada only (Y page 183)
The climate control combines an automatic
heating and ventilation system with a cooling
system. You can adjust the automatic
climate control separately for the driver’s
and passenger side.
The 3-zone automatic climate control
combines an automatic heating and
ventilation system with a cooling system.
You can adjust the 3-zone automatic climate
control separately for each zone in the
vehicle.
Rear automatic climate
control (Y page 185)
The rear automatic climate control allows
separate climate settings for the rear
compartment.
Air ventsGWarning!
When operating the climate control, the air
that enters the passenger compartment
through the air vents can be very hot or very
cold (depending on the set temperature). This
may cause burns or frostbite to unprotected
skin in the immediate area of the air vents.
Always keep sufficient distance between
unprotected parts of the body and the air
vents. If necessary, use the air distribution
adjustment to direct the air to air vents in the
vehicle interior that are not in the immediate
area of unprotected skin.
172Overview of climate control system functions and air ventsControls in detail
X164_AKB; 5; 31, en-USd2ureepe,Version: 2.11.8.12009-09-11T12:30:16+02:00 - Seite 172

The air conditioning uses the refrigerant
R134a. This refrigerant is free of CFCs which
are harmful to the ozone layer.
! If the air conditioning cannot be activated
again, this indicates that the air
conditioning is losing refrigerant. The
compressor has turned off.
Have the air conditioning checked at the
nearest authorized Mercedes-Benz Center.
Automatic mode
When operating the climate control system in
automatic mode, the interior air temperature,
air volume and air distribution are adjusted
automatically.
In automatic mode, cooling with
dehumidification is switched on. This function
can be switched off if necessary.
GWarning!
If you switch off the air conditioning, the
vehicle will not be cooled when weather
conditions are warm. The windows can fog up
more quickly. Window fogging may impair
visibility and endanger you and others.
XSet the desired temperature
( Y page 178).XActivating: Press button Ã.
The indicator lamp in the button comes on.
The air volume and air distribution are
adjusted automatically.
i The settings for the passenger side are
also used for the rear passenger
compartment.
XDeactivating: Press button I or K .
The indicator lamp in button à goes out.
The automatic operation of air volume
switches off. The selected blower speed isshown in air volume display G
( Y page 175).
or
XPress air distribution button ¯, P , or
O .
The indicator lamp in button à goes out.
The automatic operation of air distribution
switches off.
Setting the temperature
You can adjust the air temperature on each
side of the passenger compartment. You
should raise or lower the temperature setting
in small increments, preferably starting at
72‡ (22†).
XIncreasing/decreasing: Turn
temperature control : and/or C
( Y page 175) slightly clockwise or
counterclockwise.
Adjusting air distribution
The air distribution can be adjusted manually.
The symbols on the buttons represent the
following functions:
SymbolFunction¯Directs air to the windshield and
side air ventsPDirects air through the center
and side air ventsODirects air to the footwells and
side air ventsXPress the desired air distribution button
¯ , P , or O .
The indicator lamp in button à goes out.
The automatic mode is switched off. Air
distribution is controlled according to the
desired button.178Climate controlControls in detail
X164_AKB; 5; 31, en-USd2ureepe,Version: 2.11.8.12009-09-11T12:30:16+02:00 - Seite 178

FunctionRecommendation/NotesBAC cooling on/offiSwitches on the air
conditioning. The indicator
lamp in button Á comes
on.( Y page 186)Residual heat/ventilationi
With the engine turned off, it
is possible to continue to heat
or ventilate the interior.( Y page 191)CTemperature control, passenger
sidei Set the temperature to 72‡
(22†).( Y page 187)DOperating the rear climate
control from the front( Y page 186)EAir distribution (directs air
through center and side air
vents)( Y page 188)FAir distribution (directs air
through the footwells and side
air vents)( Y page 188)GAir volume displayHDecreasing air volume(Y page 189)IRear window defroster(Y page 191)JAir recirculationi
Only use this function for a
short time, e.g. in a tunnel.
Otherwise, the windows can
fog up due to lack of fresh air.( Y page 190)KInterior temperature sensorLClimate control on/offi
Switches on the climate
control system. The indicator
lamp in button ^ goes out.(Y page 185)1823-zone automatic climate controlControls in detail
X164_AKB; 5; 31, en-USd2ureepe,Version: 2.11.8.12009-09-11T12:30:16+02:00 - Seite 182

Canada onlyFunctionRecommendation/Notes:Temperature control, driver’s
side
iSet the temperature to 72‡
(22†).
(Y page 187);Air distribution and air volume
(automatic mode)
iSwitches on the automatic
mode. The indicator lamp in
button à comes on.
(Y page 187)=Air distribution, driver’s side
(directs air through the
windshield and side air vents)
(Y page 188)?Front defrosteriKeep this setting selected
only until the windshield or the
side windows are clear again.
(Y page 189)AIncreasing air volume(Y page 189)BRear window defroster(Y page 191)CAir distribution, passenger side
(directs air through the
windshield and side air vents)
(Y page 188)DOperating the rear climate
control from the front
(Y page 186)ETemperature control, passenger
side
iSet the temperature to 72‡
(22†).
(Y page 187)3-zone automatic climate control183Controls in detailX164_AKB; 5; 31, en-USd2ureepe,Version: 2.11.8.12009-09-11T12:30:16+02:00 - Seite 183Z

The air conditioning uses the refrigerant
R134a. This refrigerant is free of CFCs which
are harmful to the ozone layer.
! If the air conditioning cannot be activated
again, this indicates that the air
conditioning is losing refrigerant. The
compressor has turned off.
Have the air conditioning checked at the
nearest authorized Mercedes-Benz Center.
Automatic mode
You can switch the climate control system on
and off for each zone of the passenger
compartment as desired.
When operating the climate control system in
automatic mode, the interior air temperature,
air volume and air distribution are adjusted
automatically.
In automatic mode, cooling with
dehumidification is switched on. This function
can be switched off if necessary.
GWarning!
If you switch off the air conditioning, the
vehicle will not be cooled when weather
conditions are warm. The windows can fog up
more quickly. Window fogging may impair
visibility and endanger you and others.
XSet the desired temperature
( Y page 187).XActivating: Press button Ã.
The indicator lamp in the button comes on.
i The settings for the passenger side are
also used for the rear passenger
compartment.
XDeactivating: Press button I or K .
The indicator lamp in button à goes out.
The automatic air volume is switched off
and is controlled according to the desiredsetting. The automatic air distribution
remains switched on.
or
XPress an air distribution button Z14
,
M 14
, \ 14
, P , ¯ 15
, c 14
or
O .
The indicator lamp in button à goes out.
The automatic air distribution is switched
off and is controlled according to the
desired position. The automatic air volume
remains switched on.
Automatic mode with rear climate
control panel
XActivating: Press button Ã.
The indicator lamp in the button comes on.
The temperature, air volume and air
distribution are adjusted automatically.XDeactivating: Press button I or K .
The automatic air volume is switched off
and is controlled according to the desired
setting. The automatic air distribution
remains switched on.
or
XPress button M or P .
The automatic air distribution is switched
off and is controlled according to the
desired position. The automatic air volume
remains switched on.
Setting the temperature
You can set the air temperature for each of
the 3 zones separately.You should raise or
lower the temperature setting in small
increments, preferably starting at 72‡
(22†).
14 Canada only
15 USA only3-zone automatic climate control187Controls in detailX164_AKB; 5; 31, en-USd2ureepe,Version: 2.11.8.12009-09-11T12:30:16+02:00 - Seite 187Z

iLeaving the engine running and the fuel
filler cap open can cause the yellow fuel
tank reserve warning lamp to flash and the
malfunction indicator lamp ! (USA
only) or ; (Canada only) to illuminate.
For more information, see also “Practical
hints” ( Y page 320).XRemove the SmartKey from the starter
switch.
KEYLESS-GO: Open the driver’s door. This
puts the starter switch in position 0, same
as with the SmartKey removed from the
starter switch. The driver’s door then can
be closed again.XOpening: Press fuel filler flap : at the
point indicated by the arrow.XTurn fuel filler cap ; counterclockwise.XTake off fuel filler cap ;.
!
The fuel filler cap is tethered to the fuel
filler neck. Do not drop the cap. It could
damage the vehicle paint finish.
XSet fuel filler cap ; on fuel filler flap :.XFully insert filler nozzle unit and refuel.XOnly fill your tank until the filler nozzle unit
cuts out – do not top off or overfill .XClosing: Turn fuel filler cap ; clockwise
until it audibly engages.
i Close the fuel filler flap before locking the
vehicle. Otherwise the flap locking pin will
prevent closing the fuel filler flap.
XClose fuel filler flap :.
Low outside temperatures (diesel
engine)
! Do not fill the tank with gasoline. Do not
blend diesel fuel with gasoline or kerosene.
The fuel system and engine will otherwise
be damaged, which is not covered by the
Mercedes-Benz Limited Warranty.
To prevent malfunctions, diesel fuel with
improved cold flow characteristics is offered
in the winter months. Check with your fuel
retailer.
Check regularly and before a long trip
For information on quantities and
requirements of operating agents, see “Fuels,
coolants, lubricants, etc.” ( Y page 368).
Check the following:
R Engine oil level ( Y page 230)
R Tire inflation pressure ( Y page 237)
R Coolant level ( Y page 231)
R Vehicle lighting ( Y page 328)
R Washer system and headlamp cleaning
system ( Y page 232)
R Brake fluid ( Y page 233)
Engine compartment
Hood
GWarning!
Do not pull the release lever while the vehicle
is in motion. Otherwise the hood could be
forced open by passing air flow.
This could cause the hood to come loose and
injure you and/or others.
Opening
GWarning!
Do not open the hood when the engine is
overheated. You could be seriously injured.
Observe the coolant temperature display to
determine whether the engine may be
overheated. If you see flames or smoke
coming from the engine compartment, move
away from the vehicle. Wait until the engine
has cooled. If necessary, call the fire
department.
228Engine compartmentOperation
X164_AKB; 5; 31, en-USd2ureepe,Version: 2.11.8.12009-09-11T12:30:16+02:00 - Seite 228

Important guidelines
R Only use sets of tires and rims of the same
type and make.
R Tires must be of the correct size for the rim.
R Break in new tires for approximately
60 miles (100 km) at moderate speeds.
R Regularly check the tires and rims for
damage. Dented or bent rims can cause tire
inflation pressure loss and damage to the
tire beads.
R If the vehicle is heavily loaded, check tire
inflation pressure and correct as required.
R Do not allow your tires to wear down too
far. Adhesion properties on wet roads are
sharply reduced at tread depths of less
than 1
/ 8 in (3 mm).
R When replacing individual tires, you should
mount new tires on the front wheels first
(on vehicles with same-sized wheels all
around).
Recommended tire inflation pressure
GWarning!
Follow recommended tire inflation pressures.
Do not underinflate tires. Underinflated tires
wear excessively and/or unevenly, adversely
affect handling and fuel economy, and are
more likely to fail from being overheated.
Do not overinflate tires. Overinflated tires can
adversely affect handling and ride comfort,
wear unevenly, increase stopping distance,
and result in sudden deflation (blowout)
because they are more likely to become
punctured or damaged by road debris,
potholes etc.
Do not overload the tires by exceeding the
specified load limit as indicated on the Tire
and Loading Information placard on the
driver’s door B-pillar. Overloading the tires
can overheat them, possibly causing a
blowout. Overloading the tires can also result
in handling or steering problems, or brake
failure.
Your vehicle is equipped with the Tire and
Loading Information placard located on the
driver’s door B-pillar ( Y page 242).
The tire inflation pressure should be checked
regularly. Only adjust the tire inflation
pressure on cold tires. The tires can be
considered cold if the vehicle has been
parked for at least 3 hours or driven less than
1 mile (1.6 km). Depending on the ambient
temperature, the driving speed and the tire
load, the tire temperature changes. When the
tire temperature changes by 18 ‡ (10†), the
tire inflation pressure will change by
approximately 1.5 psi (0.1 bar). Keep this in
mind when checking tire inflation pressure on
warm tires and adjust the tire pressure only
if the tire inflation pressure is too low for the
current operating conditions. If you check the
tire inflation pressure when the tires are
warm, the reading will be higher than the cold
reading. This is normal. Do not let air out to
match the specified cold tire inflation
pressure. Otherwise, the tire will be
underinflated.
Follow recommended cold tire inflation
pressures listed on Tire and Loading
Information placard on the driver’s door
B-pillar.
Keeping the tires properly inflated provides
the best handling, tread life and riding
comfort.
In addition to the Tire and Loading
Information placard on the driver’s door
B-pillar, also consult the tire inflation
pressure label on the inside of the filler flap
for any additional information pertaining to
special driving situations. For more
information, see “Important notes on tire
inflation pressure” ( Y page 235).
i Data shown on Tire and Loading
Information placard example are for
illustration purposes only. Tire data are
specific to each vehicle and may vary from234Tires and wheelsOperation
X164_AKB; 5; 31, en-USd2ureepe,Version: 2.11.8.12009-09-11T12:30:16+02:00 - Seite 234