MERCEDES-BENZ G55AMG 2008 W463 Owner's Manual

390 Practical hints
Flat tire
Wheel wrench
Take the wheel wrench out of the
vehicle tool kit.
On wheel to be changed, loosen but do
not yet remove the wheel bolts
(approximately one full turn with the
wheel wrench).
Pump handle (three pieces)
1Indent for activation of release bolt 2
Take the pump handle out of the
vehicle tool kit.
Assemble the pump handle for the
jack.
Jack
2Release bolt
Set indent 1 of the pump handle onto
release bolt 2.
Using the pump handle, turn release
bolt 2 clockwise until its stop.
Release bolt 2 is closed.
Remove the pump ha ndle from release
bolt 2.
Set the pump handle into the pump
lever (indicated by the arrow).

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391
Practical hints
Flat tire
Place jack on firm ground.
Position jack under the axle housing,
so that it is always vertical (plumb-line)
as seen from the side, even if the
vehicle is parked on an incline.
Be certain the jack arm is positioned
correctly under the axle housing (axle
must fall into jack contour).
Jack up the vehicle by pumping
(indicated by the arrow) until the wheel
is a maximum of 1.2 in (3 cm) from the
ground.
Removing the wheel
Remove the wheel bolts.
Remove the wheel.
!Do not position the jack on the body of the
vehicle, as this may cause damage to the
vehicle.
Warning!G
The jack is intended only for lifting the
vehicle briefly for wheel changes. It is not
suited for performing maintenance work
under the vehicle.

Never start the engine when the vehicle
is raised.

Never lie down under the raised vehicle.
!Do not place wheel bolts in sand or dirt. This
could result in damage to the bolt and wheel hub
threads.
Warning!G
Make sure no one is injured when removing
the wheel.
Grip wheel from the sides.
Keep hands from beneath the wheel.
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392 Practical hints
Flat tire
Mounting the new wheel
Clean contact surfaces of wheel and
wheel hub.
Push the wheel onto the wheel hub and
press firmly.
Insert wheel bolts and tighten them
slightly. Lowering the vehicle
Using the pump handle, turn the
release bolt of the jack counter-
clockwise approximately one turn
(
page 390).
Lower the vehicle until it is resting fully
on its own weight.
Remove the jack.
!To avoid paint damage, place wheel flat
against hub and hold it there while installing first
wheel bolt.
Warning!G
Always replace wheel bolts that are
damaged or rusted.
Never apply oil or grease to wheel bolts.
Damaged wheel hub threads should be
repaired immediately. Do not continue to
drive under these circumstances! Contact
an authorized Mercedes-Benz Light Truck
Center.
Incorrect wheel bolts or improperly tight-
ened wheel bolts can cause the wheel to
come off. This could cause an accident.
Make sure to use the correct wheel bolts.
Warning!G
Only use genuine Mercedes-Benz wheel
bolts. Other wheel bolts may come loose.
Do not tighten the wheel bolts when the
vehicle is raised. Otherwise the vehicle
could tip over.
iNever turn the release bolt of the jack more
than one or two revolut ions. Otherwise hydraulic
fluid can escape.
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393
Practical hints
Flat tire
1
-5 Wheel bolts
Tighten the five wheel bolts evenly,
following the diagonal sequence illus-
trated ( 1 to 5), until all wheel bolts
are tight. Observe a tightening torque
of 96 lb-ft (130 Nm).
Disassemble the pump handle
(
page 390).
Put the pump handle and the wheel
wrench back into the vehicle tool kit.
Store the vehicle tool kit in the
designated storage compartment
(
page 364).
Press the jack piston in again and close
the lowering screw (
page 390).
Store the jack in the designated
storage compartment (
page 365).
After changing the wheel, secure the
damaged wheel on the spare wheel
carrier (
page 367). Make sure the
wheel cannot come loose.
Check the tire inflation pressure and
correct it if necessary.
Follow recommended cold tire inflation
pressures listed on the Tire and
Loading Information placard on the
driver’s door B-pillar (
page 280).
Warning!G
Have the tightening torque checked after
changing a wheel. The wheels could come
loose if they are not tightened to a torque of
96 lb-ft (130 Nm).
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394 Practical hints
Battery
The battery is located in front of the rear
seat bench and below the cup holder.
Jump starting terminals are located on the
driver’s side of the engine compartment
(
page 398).
The battery should always be sufficiently
charged in order to achieve its rated
service life. Refer to Maintenance Booklet
for battery maintenance intervals.
If you use your vehicle mostly for
short-distance trips, you will need to have
the battery charge checked more
frequently.
When replacing the battery, always use
batteries approved by Mercedes-Benz.
If you do not intend to operate your vehicle
for an extended period of time, consult an
authorized Mercedes-Benz Light Truck
Center about steps you need to observe. Batteries contain materials that can harm
the environment if disposed of improperly.
Large 12-volt storag
e batteries contain
lead. Recycling of batteries is the preferred
method of disposal. Many states require
sellers of batteries to accept old batteries
for recycling.
iMercedes-Benz recommends to have the
battery replaced at an authorized
Mercedes-Benz Light Truck Center.
Warning!G
Observe all safety instructions and precau-
tions when handling automotive batteries.
Risk of explosion.
Fire, open flames and smoking
are prohibited when handling
batteries. Avoid creating sparks.
Battery acid is caustic. Do not
allow it to come into contact
with skin, eyes or clothing.
Wear suitable protective cloth-
ing, especially gloves, apron and
faceguard.
Wear eye protection.
Rinse any acid spills imme-
diately with clear water. Contact
a physician if necessary.
Keep children away.
Follow the instructions in this
Operator’s Manual.
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395
Practical hints
Battery
Warning!G
Failure to follow thes
e instructions can
result in severe injury or death.
Observe all safety instructions and precau-
tions when handling automotive batteries
(
page 394).
Never lean over batteries while connecting,
you might get injured.
Battery fluid contains sulfuric acid. Do not
allow this fluid to come in contact with eyes,
skin or clothing. In case it does, immediately
flush affected area with water and seek
medical help if necessary.
A battery will also pr oduce hydrogen gas,
which is flammable and explosive. Keep
flames or sparks away from battery, avoid
improper connection of jumper cables,
smoking, etc.
Warning!G
Jump starting must only be done using the
jump-start terminals located in the engine
compartment (
page 398).
Warning!G
Do not place metal objects on the battery as
this could result in a short circuit.
Use leak-proof battery only to avoid the risk
of acid burns in the event of an accident.
!Never loosen or detach battery terminal
clamps while the engine is running or the
SmartKey is in the starter switch. Otherwise the
alternator and other electronic components
could be severely damaged.
Have the battery checked regularly at an
authorized Mercedes-Benz Light Truck Center.
Refer to Maintenance Booklet for maintenance
intervals or contact an authorized
Mercedes-Benz Light Truck Center for further
information.
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396 Practical hints
Battery
Disconnecting, removing, reinstalling
and reconnecting the battery
Disconnecting, removing, reinstalling and
reconnecting the battery is a complicated
and technically demanding procedure that
also requires safety precautions to avoid
the risk of injury. We strongly recommend
that it should be performed by a qualified
technician only. If it is necessary to work
on the battery, contac t a local authorized
Mercedes-Benz Light Truck Center or call
our Customer Assistance Center at
1-800-FOR-MERCedes (1-800-367-6372).
Charging the battery
If the battery is disc harged, the battery can
be charged using the jump-start terminals
located in the engine compartment
(
page 398).
Charge the battery in accordance with
the instructions of the battery charger
manufacturer.
!Never invert the terminal connections!
!The battery, its filler caps and the vent tube
must always be securely installed when the
vehicle is in operation.
Warning!G
Never charge a battery while still installed in
the vehicle unless th e accessory battery
charge unit* approved by Mercedes-Benz is
being used. Gases may escape during charg-
ing and cause explosions that may result in
paint damage, corrosion or personal injury.
An accessory battery ch arge unit* specially
adapted for Mercedes-Benz vehicles and
tested and approved by Mercedes-Benz is
available, permitting the charging of the
battery in its installe d position. Contact an
authorized Mercedes-Benz Light Truck
Center for information and availability.
Charge battery in acco rdance with the sepa-
rate instructions for the accessory battery
charger*.
iWith a discharged battery

you will no longer be able to turn the
SmartKey in the starter switch

the gear selector lever will remain locked in
park position P
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397
Practical hints
Jump starting
 Jump starting
If the battery is disc harged, the engine can
be started with jumper cables and the
battery of another vehicle. Observe the
following:

Jump starting should only be performed
using the jump-start terminals located
in the engine compartment
(
page 398).

Jump starting should only be performed
when the engine and catalytic
converter are cold.

Do not start the engine if the battery is
frozen. Let the battery thaw out first.

Only jump start from batteries with the
same voltage rating (12 V). Jump start-
ing with a higher voltage battery could
damage the vehicle’s electrical system,
which will not be covered by the
Mercedes-Benz Limited Warranty.

Only use jumper cables with sufficient
cross-section and insulated terminal
clamps.

Always make sure the jumper cables
are not on or near pulleys, fans, or
other parts that move when an engine
is started or running.
Warning!G
Failure to follow thes e directions will cause
damage to the electr onic components, and
can lead to a battery explosion and severe
injury or death.
Never lean over batteries while connecting
or jump starting, you might get injured.
Battery fluid contains sulfuric acid. Do not
allow this fluid to come in contact with eyes,
skin or clothing. In case it does, immediately
flush affected area with water, and seek
medical help if necessary.
A battery will also pr oduce hydrogen gas,
which is flammable and very explosive. Keep
flames or sparks away from battery, avoid
improper connection of jumper cables,
smoking, etc.
Attempting to jump start a frozen battery
can result in it explod ing, causing personal
injury.
Read all instructions before proceeding.
!Do not tow-start the vehicle.
!Avoid repeated and lengthy starting
attempts.
Do not attempt to start the engine using a
battery quick charge unit.
If the engine does not run after several unsuc-
cessful starting attempts, have it checked at the
nearest authorized Mercedes-Benz Light Truck
Center.
Excessive unburned fuel generated by repeated
failed starting attempts may damage the
catalytic converter.
Make sure the jumper cables do not have loose
or missing insulation.
Make sure the cable clamps do not touch any
other metal part while the other end is still
attached to a battery.
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398 Practical hints
Jump starting
Make sure the two vehicles do not
touch.
Apply the parking brake (page 62).
Move the gear selector lever to park
positionP.
Turn off all electrical consumers.
Open the hood (page 267). The jump-start terminals are located on
the driver’s side of the engine compart-
ment.
1 Cover
2 Positive (+) terminal
3 Negative (-) terminal Open cover 1 of the positive terminal
of both vehicles.
Connect positive terminal 2 and the
positive terminal of the charged battery
with the jumper cable. Clamp the cable
to the charged battery first.
Start the engine of the vehicle with the
charged battery and run at idle speed.
Connect negative terminal 3 and the
negative terminal of the charged
battery with the jumper cable. Clamp
the cable to the charged battery first.
Start the engine of the disabled
vehicle.
You can now turn on the electrical con-
sumers. Do not switch on the headlamps
under any circumstances.
Remove the jumper cables first from
the negative terminals on each battery
and then from the positive terminals on
each battery.
You can now switch on the headlamps.
Have the battery checked at the
nearest authorized Mercedes-Benz
Light Truck Center.
Warning!G
Keep flames or sparks away from battery.
Do not smoke.
Observe all safety inst ructions and precau-
tions when handling automotive batteries
(
page 394).
!Never invert the terminal connections!
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399
Practical hints
Towing the vehicle
 Towing the vehicle
Mercedes-Benz recommends that the
vehicle be transported with all wheels off
the ground using flatbed or appropriate
wheel lift/dolly equipment. This method is
preferable to other types of towing. When circumstances do not permit the
recommended towing methods, the
vehicle may be towed with all wheels on
the ground only so far as necessary to have
the vehicle moved to a safe location where
the recommended towing methods can be
employed.
!Use flatbed or wheel lift/dolly equipment,
with SmartKey in starter switch turned to
position 0.
Do not tow with sling-type equipment. Towing
with sling-type equipment over bumpy roads will
damage radiator and supports.
To prevent damage during transport, do not tie
down vehicle by its chassis or suspension parts.
Use the towing eyes.
Switch off the ESP
® (page 93), the tow-away
alarm (
page 97) and the automatic central
locking (
page 155).
!Do not tow-start the vehicle.
!When towing the vehicl e with all wheels on
the ground, the gear selector lever must be in
neutral position N and the SmartKey must be in
starter switch position 2.
When towing the vehicle with all wheels on the
ground, the vehicle may be towed only for
distances up to 30 miles (50 km) and at a speed
not to exceed 30 mph (50 km/h).
If the vehicle is towed with one axle raised
(observe instructions regarding flexible drive
shaft and propeller shafts ), the engine must be
shut off and the SmartKey must be in starter
switch position 1. Otherwise, the 4-ETS may
become engaged which may cause loss of
towing control.
Warning!G
If circumstances require towing the vehicle
with all wheels on the ground, always tow
with a tow bar if:

the engine will not run

there is a malfunction in the brake sys-
tem

there is a malfunction in the power
supply or in the vehicle’s electrical
system
This is necessary to adequately control the
towed vehicle.
Prior to towing the vehicle with all wheels on
the ground, make sure the SmartKey is in
starter switch position 2.
If the SmartKey is left in the starter switch
position 0 for an extended period of time, it
can no longer be turned in the switch. In this
case, the steering is locked. To unlock,
remove SmartKey from starter switch and
reinsert.
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