2007 MERCEDES-BENZ GL450 Lower button

156 Controls in detail
Instrument cluster
Resetting trip odometer
Make sure you are viewing the trip odome-
ter display (
page 157).
If it is not displayed, press buttonè
orÿ on the multifunction steering
wheel (
page 158) repeatedly until
the trip odometer appears in the multi-
function display.
Press and hold reset button2 in the
instrument cluster (
page 155) until
the trip odometer is reset.
Tachometer
The red marking on the tachometer
(
page 26) denotes excessive engine
speed.To help protect the engine, the fuel supply
is interrupted if the engine is operated
within the red marking.
Outside temperature indicator
The outside temperature is displayed in the
multifunction display (
page 157).The temperature sensor is located in the
front bumper area. Due to its location, the
sensor can be affected by road or engine
heat during idling or slow driving. This
means that the accuracy of the displayed
temperature can only be verified by com-
parison to a thermometer placed next to
the sensor, not by comparison to external
displays (e.g. bank signs etc.).
When moving the vehicle into colder ambi-
ent temperatures (e.g. when leaving your
garage), you will notice a delay before the
lower temperature is displayed.
A delay also occurs when ambient temper-
atures rise. This prevents inaccurate tem-
perature indications caused by heat
radiated from the engine during idling or
slow driving.!Avoid driving at excessive engine speeds, as
it may result in serious engine damage that is not
covered by the Mercedes-Benz Limited
Warranty.
Warning!G
The outside temperature indicator is not de-
signed to serve as an ice-warning device and
is therefore unsuitable for that purpose.
Indicated temperatures just above the freez-
ing point do not guarantee that the road sur-
face is free of ice. The road may still be icy,
especially in wooded areas or on bridges.

175 Controls in detail
Control system
Available languages:

German

English

French

Italian

Spanish

Dutch

Swedish

Danish

Turkish

Portuguese

Russian (Canada only)Selecting display (digital speedometer
or outside temperature) for status
indicator
Move the selection marker with
buttonæ orç to the
Instr.
cluster
submenu.
Press buttonj ork repeatedly
until the message
Status line
display
appears in the multifunction
display.
The selection marker is on the current
setting.
Press buttonæ orç 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
menu of the standard display
(
page 164):

Digital speedometer
or

Outside temperature

186 Controls in detail
Control system
Distance warning function*
In vehicles equipped with Distronic*, you
can determine whether the distance warn-
ing function is to be enabled or disabled.
With this function set to
On, the system will
alert you when recognizing a stationary ob-
stacle or a slower vehicle moving in your
vehicle’s path and the danger of a collision
exists, even when the Distronic* is
switched off.
Switch on the ignition (page 42).
Press buttonè orÿ repeatedly
until the
Vehicle configuration menu
appears in the multifunction display.
Press buttonj ork repeatedly
until the message
Distance warning
appears in the multifunction display.
The selection marker is on the current
setting.
Press buttonæ orç to switch
the distance warning function
OnorOff.
1Symbol for activated distance warning
function
If the distance warning function is
activated you will see the :symbol in
the Standard display. When the distance
warning function is deactivated the
:symbol will not appear.DSR (Downhill Speed Regulation)
programmed default speed
In the
Downhill Speed Regulation menu,
you can program the default speed the
DSR is set to when it is activated.
You can program the default speed be-
tween 4 - 10 mph (Canada: 6 - 18 km/h).
The set value is increased in 1 mph
(Canada: 2 km/h) increments.
Press buttonè orÿ repeatedly
until the
Vehicle configuration menu
appears in the multifunction display.
Press buttonj ork repeatedly
until the message
DSR Speed appears
in the multifunction display.
The selection marker is on the current
setting.

200 Controls in detail
Automatic transmission
Towing a trailer
If you tow a trailer, note the following
points:

Manually shift to a lower gear range
(
page 200) if the transmission hunts
between gears on inclines.
A lower gear range and reduction of
speed reduces the chance to overload
or overheat the engine.
For more information on trailer towing, see
the “Operation” section (
page 366).
Gear ranges
With the automatic transmission in drive
positionD, you can select a gear range for
the automatic transmission to operate
within.
You can limit the gear range by pressing
the left gearshift button on the steering
wheel gearshift control, and reverse the
gear range limit by pressing the right gear-
shift button on the steering wheel gearshift
control (
page 201).The selected gear range appears in the
multifunction display.
1Current gear range
Effect
ïThe transmission shifts through
sixth gear only.
îThe transmission shifts through
fifth gear only.
éThe transmission shifts through
fourth gear only.
èThe transmission shifts through
third gear only.
With this selection you can use
the braking effect of the engine.
Effect
çThe transmission shifts through
second gear only.
Allows the use of engine’s
braking power when driving:

on steep downgrades

in mountainous regions

under extreme operating
conditions
æThe transmission operates in
first gear only.
For maximum use of engine’s
braking effect on very steep or
lengthy downgrades.

201 Controls in detail
Automatic transmission
Steering wheel gearshift control
With drive positionD selected, you can
limit or extend the gear range.
1Left button: limiting gear range or
downshift
2Right button: extending gear range or
upshiftDownshifting
Briefly press left shift button1.
The transmission will shift to the next
lower gear as permitted by the shift
program. This action simultaneously
limits the gear range of the automatic
transmission (
page 200).
!Allow engine to warm up under low load use.
Do not place full load on the engine until the
operating temperature has been reached.
Shift into reverse gearR or park positionP only
when the vehicle is stopped.
Avoid spinning of a drive wheel for an extended
period when driving off on slippery road
surfaces. This may cause serious damage to the
drivetrain which is not covered by the
Mercedes-Benz Limited Warranty.
iYou cannot shift with the steering wheel
gearshift buttons when the transmission is in
positionP,N orR.
Warning!G
On slippery road surfaces, never downshift
in order to obtain braking action. This could
result in drive wheel slip and reduced
vehicle control. Your vehicle’s ABS will not
prevent this type of loss of control.
iTo avoid overrevving the engine when down-
shifting, the transmission will not shift to a lower
gear if the engine’s max. speed would be ex-
ceeded.

220 Controls in detail
Climate control
Deactivating the climate control
system
Deactivating
Press button´ (page 218).
The indicator lamp on the button
comes on.Reactivating
Press buttonU (page 218).
Operating the climate control system
in automatic modeActivating
Press buttonU (page 218) while
the engine is running.
The indicator lamp on the button
comes on. The air volume and air distri-
bution are adjusted automatically.
Use temperature controls1 and7
(
page 218) to separately adjust the
air temperature on each side of the
passenger compartment.
The interior air temperature is adjusted
automatically.
Deactivating
Press button
orQ
(
page 218).
The indicator lamp on buttonU
goes out. The automatic operation of
air volume switches off. The selected
blower speed is shown in the air
volume displayb (
page 218).
Warning!G
When the climate control system is
switched off, the outside air supply and cir-
culation are also switched off. Only choose
this settings for a short time. Otherwise the
windows could fog up, impairing visibility
and endangering you and others.
iYou can also press button´
(
page 218) on the climate control panel.
If you press button0 or, depending on vehi-
cle production date, button|(
page 218)
to reactivate the climate control system, the
defrosting mode is activated.
iWhen operating the climate control system
in automatic mode, you will only rarely need to
adjust the temperature, air volume and air distri-
bution.
In automatic mode, cooling with dehumidify is
switched on. This function can be switched off if
necessary (
page 227).
iThe settings for the passenger side are also
used for the rear passenger compartment.

221 Controls in detail
Climate control
or
Press air distribution button5,9,
ora (
page 218).
The indicator lamp on buttonU
goes out. The automatic operation of
air distribution switches off.
Setting the temperature
Use temperature controls1 and7
(
page 218) to separately adjust the air
temperature on each side of the passenger
compartment. You should raise or lower
the temperature setting in small incre-
ments, preferably starting at 72°F (22°C).
The climate control will adjust to the set
temperature as fast as possible.Increasing
Turn temperature control1
and/or7 (
page 218) slightly clock-
wise.
The climate control system will corre-
spondingly adjust the interior air tem-
perature.
Decreasing
Turn temperature control1
and/or7 (
page 218) slightly coun-
terclockwise.
The climate control system will corre-
spondingly adjust the interior air tem-
perature.
Adjusting air distribution
Press air distribution button5,9, ora
(
page 218) to adjust the air distribution.
The following symbols are found on the
controls:
Press the desired air distribution
button5,9, ora (
page 218).
The indicator lamp on buttonU
goes out.
SymbolFunction
aDirects air through the center
and side air vents
ZDirects air to the windshield
and side air vents
YDirects air to the footwells and
side air vents

222 Controls in detail
Climate control
Adjusting air volume
Five blower speeds are available.
Press button
to decrease or
buttonQ to increase air volume
(
page 218) to the desired level.
The indicator lamp on buttonU
(
page 218) goes out. The automatic
operation of air volume switches off.
The selected blower speed is shown in
the air volume displayb
(
page 218).
Adjusting air volume for the center and
side air vents
Opening the center air vents
Turn thumbwheels4 and7
(
page 216) to the right.
The corresponding center air vents on
the left and right are open.Closing the center air vents
Turn thumbwheels4 and7
(
page 216) to the left.
The corresponding center air vents on
the left and right are closed.
Opening the side air vents
Turn thumbwheels3 and8
(
page 216) to the right.
The corresponding side air vents on the
left and right are open.
Closing the side air vents
Turn thumbwheels3 and8
(
page 216) to the left.
The corresponding side air vents on the
left and right are closed.Air vents in the roof liner over the
second-row seats*
1Thumbwheel for air volume control
2Air vent, adjustable
Adjusting air volume
Turn thumbwheel1 d o w n t o d e c r e a s e
the air volume.
or
Turn thumbwheel1 u p t o i n c r e a s e t h e
air volume.