2007 MERCEDES-BENZ GL450 light

485 Practical hints
What to do if …
Display symbolDisplay messagesPossible cause/consequencePossible solution
. Switch off lightsYou have removed the SmartKey
from the starter switch, opened
the driver’s door and left the
headlamps on or removed the
SmartKey with KEYLESS-GO*
from the vehicle and left the
headlamps on.Switch off the headlamps (page 69).
Switch off lights
or remove keyYou have opened the driver’s
door while the exterior lamp
switch is in positionU and
the SmartKey is still in the start-
er switch.
The parking lamps are still on.Switch off the headlamps (page 69).
or
Remove the SmartKey from the starter
switch.
Tail lamp
LeftThe left tail lamp is malfunction-
ing. A substitute bulb is being
used.Replace the bulb as soon as possible
(
page 515).
Tail lamp
RightThe right tail lamp is malfunc-
tioning. A substitute bulb is be-
ing used.Replace the bulb as soon as possible
(
page 515).

486 Practical hints
What to do if …
Display symbolDisplay messagesPossible cause/consequencePossible solution
. Turn signal
Front LeftThe left front turn signal lamp is
malfunctioning. A substitute
bulb is being used.Replace the bulb as soon as possible
(
page 513).
Turn signal
Front RightThe right front turn signal lamp is
malfunctioning. A substitute
bulb is being used.Replace the bulb as soon as possible
(
page 513).
Turn signal
Rear LeftThe left rear turn signal lamp is
malfunctioning. A substitute
bulb is being used.Replace the bulb as soon as possible
(
page 515).
Turn signal
Rear RightThe right rear turn signal lamp is
malfunctioning. A substitute
bulb is being used.Replace the bulb as soon as possible
(
page 515).
Turn signal
Left mirrorThe turn signal in the left exteri-
or rear view mirror is malfunc-
tioning. This message will only
appear if a critical number of
LEDs have stopped working.Contact an authorized Mercedes-Benz
Light Truck Center as soon as possible.
Turn signal
Right mirrorThe turn signal in the right exte-
rior rear view mirror is malfunc-
tioning. This message will only
appear if a critical number of
LEDs have stopped working.Contact an authorized Mercedes-Benz
Light Truck Center as soon as possible.

487 Practical hints
What to do if …
Display symbolDisplay messagesPossible cause/consequencePossible solution
L Tele Aid
inoperativeOne or more main functions of the
Tele Aid system are malfunctioning.Have the Tele Aid system checked by
an authorized Mercedes-Benz Light
Truck Center.
Tele Aid
batteryThe emergency power battery for the
Tele Aid system is malfunctioning. If the
vehicle battery is also malfunctioning or
drained, Tele Aid will not be operational.Have the Tele Aid system checked by
an authorized Mercedes-Benz Light
Truck Center.
tFunction
unavailableThis display appears if buttont
ors on the multifunction steering
wheel is pressed and the vehicle is not
equipped with a telephone.
W Top up
washer fluidThe fluid level has dropped to about 1/3 of
total reservoir capacity.Add washer fluid (page 384).
] Clean fuel filterHave the fuel filter checked by an
authorized Mercedes-Benz Light
Truck Center.
» Replace air filterThe air filter is clogged.Have the air filter checked by an
authorized Mercedes-Benz Light
Truck Center.

490 Practical hints
What to do if …
Display symbolDisplay messagesPossible cause/consequencePossible solution
nLevel selection
not permittedYou are driving too fast for the desired
vehicle level.Reduce vehicle speed.
Set the desired vehicle level again
(
page 281).
You are towing a trailer or using acces-
sories that are connected to the trailer
power socket, e.g. a bicycle rack.
Leveling cancelledYou have selected another vehicle
level*.
pReduce speed to
under 20 mphYou are driving too fast for the set vehi-
cle level.Do not drive faster than 20 mph
(30 km/h).
Visit workshopThe air suspension functional only to a
limited extent.Do not drive faster than 50 mph
(80 km/h) depending on the set
vehicle level.
Have the vehicle checked at an au-
thorized Mercedes-Benz Light
Truck Center.
Door open
Veh. lowering canceledYou have opened a door or the tailgate
while the vehicle is being lowered.

491 Practical hints
What to do if …
Display symbolDisplay messagesPossible cause/consequencePossible solution
Visit workshopThe air suspension is malfunctioning.Do not drive faster than 50 mph
(80 km/h) depending on the set vehi-
cle level.
Have the vehicle checked at an autho-
rized Mercedes-Benz Light Truck
Center.
Compressor
cooling downYou have selected a higher vehicle level.
Due to frequent level changes within a
short period, the compressor must first
cool down.Let the compressor cool until the
message disappears.
The selected level will be set once the
compressor has cooled.
!When the message Compressor cooling
down
appears in the multifunction display,
driving is still possible. Keep in mind that the ride
height of the vehicle is not yet reached, so you
can damage the underbody of the vehicle. The
selected level will be set once the compressor
has cooled.

493 Practical hints
What to do if …
Display symbolDisplay messagesPossible cause/consequencePossible solution
kDiff. lock system malfunct.
Visit workshopThe differential locks* are
malfunctioning.Do not drive faster than 50 mph
(80 km/h).
Have the vehicle checked at an autho-
rized Mercedes-Benz Light Truck
Center.
Diff. Lock System
overheated. Wait briefly.The differential locks* are too hot
and have been deactivated as a re-
sult.Continue driving with added caution.
The lock function is unavailable.
Wait for the lock system to cool down.
The differential locks will be reactivat-
ed as soon as they have cooled off.
mStop vehicle
Engage parking brakeA shifting procedure could not be
completed. LOW RANGE* is in neu-
tral position. There is no connection
between the engine and the drive
wheels.Do not attempt to continue driving.
You could otherwise damage the
vehicle’s drivetrain.
Let the vehicle coast to a halt.
 Engage the parking brake.
Perform the shifting procedure again
(
page 204).

494 Practical hints
What to do if …
Display symbolDisplay messagesPossible cause/consequencePossible solution
mStop vehicle
Engage parking brakeThe LOW RANGE system* could only
partially carry out the shifting proce-
dure or it could not carry out the
shifting procedure at all. The system
is in idle mode. No power is being
transmitted to the drive wheels.Do not continue driving.
Carefully let the vehicle coast to a
stop.
Firmly depress the parking brake.
Shift gears again in HIGH RANGE or
LOW RANGE (
page 204).
Visit workshop
If parked engage pk. brakeThe LOW RANGE system* is
malfunctioning.Do not drive faster than 50 mph
(80 km/h).
Engage the parking brake if parked.
Visit an authorized Mercedes-Benz
Light Truck Center as soon as possi-
ble.
max. speed 25 mphSpeed too high for shifting proce-
dure.Continue driving more slowly.
max. speed 40 mphSpeed too high for shifting proce-
dure.Continue driving more slowly.
shift briefly
into NYou have reduced engine speed. You
may now carry out a shifting proce-
dure.Briefly shift automatic transmission
to positionN.
Shifting procress canceled
ReactivateThe shifting procedure was not car-
ried out.Repeat the shifting procedure if
desired.

496 Practical hints
Where will I find ...?
3Securing hook
Release securing hook3 (located be-
low the floor handle) from holder.3Securing hook
4Cargo compartment floor, raised
5Upper cargo compartment lip
Engage securing hook3 on upper
cargo compartment lip5.
You can now access the vehicle tool kit. To
remove the vehicle tool kit storage well
casing, proceed as described on
(
page 499).6Alignment bolt
7Towing eye bolt
8Wheel wrench
9Velcro strap
aVehicle jack
bWheel bolts for 18" light alloy rims or
Minispare wheel
cCollapsible wheel chock
dSpare fuses, fuse chart, fuse extractor
eVehicle tool kit storage well casing
To remove vehicle jacka, loosen vel-
cro strap9.
!With the cargo compartment cover blind
installed behind the third-row seats
(
page 312), disengage cargo compartment
cover blind and flip it forward. Otherwise the
strap of the securing hook could damage the
cargo compartment cover blind.