MERCEDES-BENZ GL550 2008 X164 Owner's Manual

Page 291 of 601

290 Controls in detail
Driving systems
Front sensors
Rear sensors
Minimum distance
If the system detects an obstacle in this
range, all the distance warning segments
illuminate and you hear a warning signal. If
the obstacle is closer than the minimum
distance, the actual distance may no
longer be indicated by the system.Warning indicators
Visual signals indicate to the driver the rel-
ative distance between the sensors and an
obstacle. The warning indicator for the
front area is located above the center air
vents in the dashboard. The warning indi-
cator for the rear area is located in the rear
passenger compartment under the roof.
Front area warning indicator
1Left side of the vehicle
2Right side of the vehicle
3Readiness indicatorsEach warning indicator is divided into five
yellow and two red distance segments for
either side of the vehicle. The Parktronic
system is operational when the readiness
indicators3 are illuminated.
The current transmission position deter-
mines which warning indicator will be acti-
vated.
Centerapprox. 40 in (100 cm)
Cornersapprox. 24 in (60 cm)
Centerapprox. 48 in (120 cm)
Cornersapprox. 32 in (80 cm)
Centerapprox. 8 in (20 cm)
Cornersapprox. 6 in (15 cm)
Automatic trans-
mission positionWarning indicator
DFront area activated
R or NFront and rear area
activated
PNeither activated
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291 Controls in detail
Driving systems
As your vehicle approaches an object, one
or more distance segments will illuminate,
depending on the distance. When the
seventh red distance segment illuminates,
you have reached the minimum distance.
Front area: An intermittent acoustic
warning lasting a maximum of
2 seconds will sound as the first red
distance segment illuminates and a
constant acoustic warning lasting a
maximum of 2 seconds will sound for
the second red distance segment. The
signal is canceled when the automatic
transmission is set to positionP, or the
parking brake is set.
Rear area: An intermittent acoustic
warning lasting a maximum of
2 seconds will sound as the first red
distance segment illuminates and a
constant acoustic warning lasting a
maximum of 2 seconds will sound for
the second red distance segment. The
signal is canceled when the automatic
transmission is set to positionD, P, or
the parking brake is set.Switching the Parktronic system*
on/off
You can switch off the Parktronic system
manually.
The Parktronic switch is located on the
upper part of the center console.
Vehicles without enhanced off-road
package*
1Parktronic switch
2Indicator lamp
Vehicles with enhanced off-road package*
1Parktronic switch
2Indicator lamp
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Page 293 of 601

292 Controls in detail
Driving systems
Switching off
Press Parktronic switch1.
Indicator lamp2 comes on.
Switching on
Press Parktronic switch1 once more.
Indicator lamp2 goes out.Parktronic system* malfunction
If only the red distance segments illumi-
nate and an acoustic warning sounds,
there is a malfunction in the Parktronic
system. The Parktronic system will auto-
matically switch off after 20 seconds and
the indicator lamp in the Parktronic switch
comes on.
Have the Parktronic system checked
by an authorized Mercedes-Benz Light
Truck Center as soon as possible.
If only the red distance segments illumi-
nate and no acoustic warning sounds, the
Parktronic system sensors are dirty (e.g.
slush, snow or ice) or there is an interfer-
ence from other radio or ultrasonic signals
(e.g. working jackhammers, car wash or
the air brakes of trucks). The Parktronic
system will automatically switch off after
20 seconds and the indicator lamp in the
Parktronic switch comes on.
Switch off the ignition (page 42).
Clean the Parktronic system sensors
(
page 430).
Switch on the ignition (page 42).
or
Check the Parktronic system operation
at another location to rule out interfer-
ence from outside radio or ultrasonic
signals.
iThe Parktronic system switches on
automatically when you switch on the ignition
(
page 42).
Vehicles with original equipment Mercedes-Benz
Trailer Hitch Kit:
The rear Parktronic sensor will automatically
disengage when towing a trailer.
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Page 294 of 601

293 Controls in detail
Driving systems
Rear view camera*
Warning!G
The rear view camera is only an aid and may
display obstacles from a distorted perspec-
tive or inaccurately, or may not display ob-
stacles at all. The rear view camera does not
relieve you of the responsibility to be cau-
tious, take care and pay careful attention.
The rear view camera may not show objects
which are:
very close to the rear bumper
under the rear bumper
above the tailgate handle
You are responsible for safety at all times
and must continue to pay attention to the
immediate surroundings when parking and
maneuvering. This includes the area behind,
in front of and beside the vehicle. Otherwise
you could endanger yourself or others.
Warning!G
Make sure that no persons or animals are in
or near the area in which you are
parking/maneuvering. Otherwise, they
could be injured.
Warning!G
The rear view camera either will not function
or will not function to its full capability if:
the tailgate is open
it is raining very hard, snowing or foggy
it is night or you are parking/maneuver-
ing your vehicle in an area where it is
very dark
the camera is exposed to a very bright
white light
the immediate surroundings are illumi-
nated with fluorescent light (the display
may flicker)
there is a sudden change in tempera-
ture, e.g. if you drive into a heated ga-
rage from the cold (lens condensation)
the camera lens is dirty or covered
the rear of your vehicle is damaged
In this case, have the position and set-
ting of the camera checked by a quali-
fied specialist workshop.
Mercedes-Benz recommends that you
visit a Mercedes-Benz Light Truck
Center for this purpose.
Do not use the rear view camera in these sit-
uations. Otherwise you could injure yourself
or others and/or damage property including
your vehicle while parking/maneuvering.
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294 Controls in detail
Driving systems
The rear view camera is an optical parking
aid. It shows you the area behind the vehi-
cle in the COMAND system display when
reverse gearR is engaged, for example
during parallel parking.
The rear view camera is located near the
tailgate handle.
1Rear view cameraSwitching the rear view camera on and
off
Switch on the ignition (page 42).
Shift the automatic transmission in
positionR (
page 191).
The area behind the vehicle appears in
the COMAND system display.
Shift the automatic transmission
intoP,N orD to switch off the rear
view camera.
iThe area behind the vehicle is shown in the
COMAND system display as a mirror image, like
in the rear view mirror.
iThe image from the rear view camera will no
longer be displayed if you select another
function on the COMAND system while reverse
gearR is engaged. To display the image again,
disengage and reengage reverse gearR.
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Page 296 of 601

295 Controls in detail
Loading
Loading
Carriers*
Roof rails
Crossbars*
The maximum roof load (
page 561) of
any add-on roof equipment is reduced by
the unladen weight of the crossbars
(13.7 Ibs/6.2 kg).
Four keys and an Allen wrench required for
installing and removing are included with
the crossbars.
Warning!G
Only use carriers* when the crossbars have
been completely mounted. The left and right
roof rails are only stabilized by means of the
crossbars mounted.
Follow the manufacturer’s installation
instructions. Otherwise, an improperly at-
tached roof rack system or its load could be-
come detached from the vehicle.
Do not exceed the maximum roof load of
198lb (90kg).
Take into consideration that when the roof is
loaded, the handling characteristics are dif-
ferent from those when operating the vehi-
cles without a roof loaded.
!Load the carriers* in such a way that the
vehicle cannot be damaged while driving.
Make sure
the tailgate can be completely opened
the tilt/sliding sunroof can be completely
raised at the rear
iThe following accessories are available for
your Mercedes-Benz:
Roof Cargo Container – Small, Medium, or
Large
Ski and Snowboard Carrier – Standard
Ski and Snowboard Carrier – Deluxe (Only in
connection with corresponding adapter.)
For more information on Mercedes-Benz acces-
sories, contact your authorized Mercedes-Benz
Light Truck Center.
iThe keys and the Allen wrench are stored
with the vehicle tool kit under the cargo compart-
ment floor (
page 490).
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Page 297 of 601

296 Controls in detail
Loading
Installing the crossbars
iSpare parts are available as Mercedes-Benz
accessories. Contact your authorized
Mercedes-Benz Light Truck Center.
Warning!G
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 ad-
justing the crossbars or loading items on
them.
Each individual step of the installation in-
structions, the warning notices, the general
safety precautions and the instructions for
use must be followed exactly. If the cross-
bars 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 per-
sons and/or causing damage to property,
including damage to your vehicle.
Warning!G
Every time the crossbars are mounted, be-
fore you set off on a journey and periodically
during longer journeys, check all the screws
on the bars to make sure that they are se-
cure, 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 contin-
uous use.
Otherwise, the crossbars, mounted acces-
sories 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 proper-
ty, 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 at-
tached to them causing an accident, thereby
injuring you and other persons and/or caus-
ing damage to property, including damage
to your vehicle.
Warning!G
Only install the crossbars at the exact loca-
tions designated on the roof rails. The desig-
nated locations for the front crossbars are
between the markings engraved on the in-
side of the roof rails (
page 298). The des-
ignated locations for the rear crossbars are
between the gaps on the roof rails
(
page 298).
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297 Controls in detail
Loading
Otherwise, the crossbars (page 298),
mounted accessories and the objects at-
tached to them could come loose from the
vehicle causing an accident, thereby injuring
you and other persons and/or causing dam-
age to property, including damage to your
vehicle.
Warning!G
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 characteris-
tics. Accordingly, the additional weight on
the roof of the vehicle can have a detrimen-
tal effect on braking, cornering and acceler-
ation.
Never exceed the maximum permissible
roof load or the maximum permissible vehi-
cle weight, even when accessories for the
crossbars (e.g. ski racks, bicycle racks, etc.)
are being used. Overloading the vehicle
could result in an accident. When calculat-
ing the weight placed on the roof please
make sure to add the weight of the cross-
bars, accessory racks and the load carried
together.
Always adapt your driving style to the road,
traffic and weather conditions, and drive
with added caution when the roof is loaded.
Always drive with extreme care when the
roof rack is loaded. Take into consideration
that when the roof rack is loaded, the han-
dling characteristics are different from
those when operating the vehicles without a
roof rack loaded.Warning!G
Do not use accessories which have not been
approved by Mercedes-Benz for use in con-
junction with these crossbars. If non-ap-
proved accessories are used, these
accessories and/or the objects attached to
them could come loose from the vehicle,
thereby injuring you and other persons
and/or causing damage to property, includ-
ing damage to your vehicle.
!Have a second person assist you when
installing the crossbars. The vehicle could other-
wise be damaged.
!Objects attached to the crossbar system’s
accessories must not be allowed to restrict the
movement of the tilt/sliding sunroof. The
tilt/sliding sunroof could otherwise be damaged
when it is raised.
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Page 299 of 601

298 Controls in detail
Loading
1Key
2Cover cap
3Sticker FRONT (or REAR)
4Screw for clamping claw
5Clamping claw
The front and rear crossbars are of differ-
ent lengths. Please pay close attention to
stickers3 FRONT and REAR on the cross-
bars.
Unlock cover cap2 with key1.
Remove cover cap2.
Sticker3 indicating the location,
FRONT or REAR, becomes visible.
Turn screw4 counterclockwise with
the included Allen wrench until
clamping claw5 is wide open.
6Front crossbar
7Rear crossbar
8Gaps
9Markings
aRoof rails
Place front crossbar6 between
markings9 on roof railsa.4Screw for clamping claw
5Clamping claw
aRoof rail
Make sure clamping claw5 lies flush
against the inside of roof raila as
shown in the illustration.
If necessary, adjust clamping width of
crossbars (
page 299).
Slightly tighten screw4 on both sides
by turning it clockwise.
iMarkings9 are located on the inside of
each roof rail, indicated by the white lines in the
illustration.
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Page 300 of 601

299 Controls in detail
Loading
Place rear crossbar7 on roof railsa
in such a way that the clamping claws
reach into gaps8 (
page 298) on the
roof rails.
Make sure clamping claw5 lies flush
against the inside of roof raila as
shown in the illustration (
page 298).
If necessary, adjust clamping width of
crossbars (
page 299).
Slightly tighten screw4 on both sides
by turning it clockwise.
On the front and rear crossbars tighten
screws4. Observe a tightening
torque of 4 lb-ft (6 Nm).
Attach cover caps (page 298) and
lock them.
Store key and Allen wrench back into
the storage well (
page 490).
Adjusting the clamping widths of the
crossbarsThe clamping widths of the crossbars are
factory set for your vehicle. These clamp-
ing widths are solely intended for the des-
ignated positions.
Only install the crossbars at the designat-
ed locations and pay attention to the
stickers3 FRONT and REAR
(
page 298).
4Screw for clamping claw
5Clamping claw
bScrews for adjusting clamping width
(2 in total for each side)
cCover strip
Warning!G
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).
Warning!G
Only install the crossbars at the exact loca-
tions designated on the roof rails. The desig-
nated locations for the front crossbars are
between the markings engraved on the in-
side of the roof rails (
page 298). The des-
ignated locations for the rear crossbars are
between the gaps on the roof rails
(
page 298).
Otherwise, the crossbars (
page 298),
mounted accessories and the objects at-
tached to them could come loose from the
vehicle causing an accident, thereby injuring
you and other persons and/or causing dam-
age to property, including damage to your
vehicle.

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