2008 MERCEDES-BENZ GL550 Owner's Manual

488 Practical hints
What to do if …
Display symbolDisplay messagePossible cause/consequencePossible solution
kLocking System Inoperative
Service RequiredThe 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 down.
Stop vehicle,
engage parking brake.A 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.
Stop the vehicle in a safe location or
soon as it is safe to do so.
Engage the parking brake.
Perform the shifting procedure again
(
page 202).
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489 Practical hints
What to do if …
Display symbolDisplay messagePossible cause/consequencePossible solution
mService Required
If parked engage pk. brake.The LOW RANGE system* is
malfunctioning.Do not drive faster than 50 mph
(80 km/h).
Engage the parking brake if parked.
Contact an authorized
Mercedes-Benz Light Truck Center
as soon as possible.
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 N.You have reduced engine speed. You
may now carry out a shifting proce-
dure.Briefly shift automatic transmission
to positionN.
Shifting Process Canceled
ReactivateThe shifting procedure was not car-
ried out.Repeat the shifting procedure if
desired.
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490 Practical hints
Where will I find ...?
First aid kit
The first aid kit is located on the driver’s
side in the cargo compartment behind the
cover.
1Lock
2Cover in left side trim panel
Turn lock1 90° in direction of arrow.
Fold down cover2.
The first aid kit can be removed.
Vehicle tool kit
The vehicle tool kit is stored under the
cargo compartment floor.
The vehicle tool kit includes:

Towing eye bolt

Wheel wrench

Alignment bolt

Vehicle jack

Fuse chart

Collapsible wheel chock

Wheel bolts for spare wheel1Cargo compartment floor, lowered
2Handle cover
Open the tailgate (page 122).
Push in handle cover2 as indicated
by arrow and pull handle.
Lift cargo compartment floor1.
iCheck expiration dates and contents for
completeness at least once a year and replace
missing/expired items.
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491 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 495).
!With the cargo compartment cover blind
installed behind the third-row seats
(
page 310), disengage cargo compartment
cover blind and flip it forward. Otherwise the
strap of the securing hook could damage the
cargo compartment cover blind.
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492 Practical hints
Where will I find ...?
Example illustration1
6Alignment bolt
7Towing eye bolt
8Wheel wrench
9Hook and loop fastener
aVehicle jack
2
bWheel bolts
cCollapsible wheel chock
dFuse chart
eVehicle tool kit storage well casing
To remove vehicle jacka, loosen
hook and loop fastener9.Vehicle jack
The vehicle jack is located underneath the
cargo compartment floor.
1Depending on production date, your vehicle may
be equipped with a scissors-type vehicle jack.
Thus, appearance and alignment of the items may
vary.
2If your vehicle is equipped with a scissors-type
vehicle jack, a reversible ratchet is also included.
!Depending on vehicle production date your
vehicle may be equipped with a scissors-type
jack (located under the cargo compartment
floor). If so equipped, only use this jack when
jacking up the vehicle as otherwise the vehicle’s
underbody can be damaged. See separate
instructions for scissors-type jack.
!To prevent damage, always disengage the
strap of the securing hook and lower the cargo
compartment floor (
page 490) before closing
the tailgate.
Warning!G
Only use the jack supplied with your vehicle
to lift the vehicle briefly for wheel changes.
If you use the jack for any other purpose,
you or others could be inj ure d, as the ja ck is
designed only for the purpose of changing a
wheel.
When using the jack, observe the safety
notes in the “Mounting the spare wheel”
section (
page 520) and the notes on the
jack.
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493 Practical hints
Where will I find ...?
Screw-type vehicle jack
Storage position
Turn crank handle in the direction of
arrow as far as it will go.
Operational position
Turn crank handle clockwise.Before storing the vehicle jack in its stor-
age compartment:

The vehicle jack should be fully
collapsed.

The handle must be folded in (storage
position).
Scissors-type vehicle jack
Storage position
Take the reversible ratchet out of the
vehicle tool kit.
Operational position
1Scissors-type vehicle jack
2Reversible ratchet
Attach reversible ratchet2 to vehicle
jack in such a way that the wordUP
can be seen.
Before storing the vehicle jack in its stor-
age compartment:

It should be fully collapsed (storage
position).

The ratchet must be removed.
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494 Practical hints
Where will I find ...?
Setting up the collapsible wheel chock
The collapsible wheel chock serves to ad-
ditionally secure the vehicle, e.g. while
changing the wheel.
1Tilt the plate upward
2Fold the lower plate outward
3Insert the plateTilt both plates upward1.
Fold the lower plate outward2.
Guide the tabs of the lower plate all the
way into the openings of base plate3.
For information on where to place wheel
chocks when changing a wheel, see “Lift-
ing the vehicle” (
page 520).
Spare wheel
Warning!G
The dimensions of the Minispare wheel are
different from those of the road wheels. As
a result, the vehicle handling characteristics
change when driving with a Minispare wheel
mounted. Adapt your driving style accord-
ingly.
The Minispare wheel is for temporary use
only. When driving with a Minispare wheel
mounted, ensure proper tire inflation
pressure and do not exceed a vehicle speed
of 50 mph (80 km/h).
Drive to the nearest Mercedes-Benz Light
Truck Center as soon as possible to have the
Minispare wheel replaced with a regular
road wheel.
Never operate the vehicle with more than
one spare wheel mounted.
Do not switch off the ESP
® when a
Minispare wheel is mounted.
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495 Practical hints
Where will I find ...?
The Minispare wheel is located underneath
the cargo compartment floor
(
page 490).
Removing Minispare wheel
Remove the jack from the vehicle tool
kit (
page 492).
1Minispare wheel
2Retaining screw
3Vehicle tool kit storage well casing
Loosen retaining screw2 by turning it
counterclockwise.
Remove vehicle tool kit storage well
casing3.
You can now access the Minispare wheel.
Remove Minispare wheel1.
iFor information on how to mount the
Minispare wheel, see “Mounting the spare
wheel” (
page 520).
iIf retaining screw2 does not come loose,
turn vehicle tool kit storage well casing3
slightly counterclockwise. Retaining screw2
should then come loose easily.
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