2012 MERCEDES-BENZ G-Class battery

The jump-starting connection point is in the
engine compartment
(
Y page 233).
X Open the hood (Y page 210).
X Connect the battery charger to the positive
terminal and

earth point in the same order
as when connecting the donor battery in
the jump-starting procedure
(Y page 233).
X Read the battery charger's operating
instructions before charging the battery.232
Battery
Breakdown assistance

Jump-starting
G
WARNING
Failure to follow these directions will cause damage to the electronic 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 produce hydrogen gas, which is flammable and 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 exploding, causing personal injury.
Read all instructions before proceeding.
! Avoid repeated and lengthy starting attempts. Otherwise, non-combusted fuel may
damage the catalytic converter and create a risk of fire.
Do not use a rapid charging device to start the vehicle.
Make sure the jumper cables are not damaged.
Make sure the jumper cables are not touching any other metal objects when they are
connected to the battery.
If your vehicle's battery is discharged, the engine can be jump-started from another vehicle
or from a second battery using jumper cables.
Observe the following points:
X The battery is not accessible in all vehicles. If the other vehicle's battery is not accessible,
jump-start the vehicle using a second battery or a jump-starting device.
X You may only jump-start the vehicle when the engine and catalytic converter are cold.
X Do not start the engine if the battery is frozen. Let the battery thaw first.
X Jump-starting may only be performed from batteries with a nominal voltage of 12 V.
X Only use jumper cables which have a sufficient cross-section and insulated terminal clamps.
X Make sure that the jumper cables cannot come into contact with parts, such as the pulley
or the fan. These parts move when the engine is started and while it is running.
X If the battery is fully discharged, leave the battery that is being used to jump-start connected
for a few minutes before attempting to start. This charges the empty battery a little.
i Jumper cables and further information about jump-starting can be obtained from any
authorized Mercedes-Benz Center, for example.
X Make sure that the two vehicles do not touch.
X Apply the parking brake.
X Move the selector lever to P.
X Switch off all electrical consumers (e.g. radio, blower, etc.).
X Open the hood (Y page 210). Jump-starting
233
Breakdown assistance Z

Position number
B identifies the charged battery of the other vehicle or an equivalent jump-
starting device.
X Lift up cover : of positive terminal = in the direction of the arrow.
X Connect positive terminal = on your vehicle to positive terminal ; of donor battery B
using the jumper cable, beginning with your own battery.
X Start the engine of the donor vehicle and run it at idling speed.
X Connect negative terminal ? of donor battery B to earth point A of your vehicle using
the jumper cable, connecting the jumper cable to donor battery B first.
X Start the engine.
X First, remove the jumper cable from earth point A and negative terminal ?, then from
positive terminal
=

and positive terminal ;, each time disconnecting from the battery on
your own vehicle first.
X Have the battery checked at a qualified specialist workshop.234
Jump-starting
Breakdown assistance

Towing and tow-starting
Important safety notes
G
WARNING
If circumstances require towing the vehicle
with all
wheels on the ground, always tow with
a tow bar if:
R the engine will not run
R there is a malfunction in the brake system
R there is a malfunction in the power supply
or 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 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.
It is better to have the vehicle transported
than to have it towed.
! You may only tow the vehicle a maximum
distance of 30 miles (50 km). A towing
speed of 30 mph (50 km/h) must not be
exceeded.
For towing distances over 30 miles
(50 km), the vehicle must loaded onto a
transporter.
! Only secure the tow cable or tow bar to
the towing eyes. You could otherwise
damage the vehicle.
! Do not tow with sling-type equipment.
This could damage the vehicle.
! Do not use the towing eyes for recovery
purposes as this could damage the vehicle.
If in doubt, recover the vehicle with a crane.
! When towing, pull away slowly and
smoothly. If the tractive power is too high,
the vehicles could be damaged. !
Your vehicles is equipped with an
automatic transmission. Therefore, you
must not

have the vehicle tow-started. The
transmission may otherwise be damaged.
If the transfer case can be shifted into neutral
N, you can tow the vehicle.
If the transfer case cannot be shifted into
neutral N, you can tow the vehicle with one
axle raised. Please bear the following in mind:
R remove the propeller shaft between the
transfer case and the rolling axle.
R turn the SmartKey to position 1 in the
ignition lock.
The battery must be connected and charged.
Otherwise, you:
R cannot turn the SmartKey to position 2 in
the ignition lock
R cannot shift the automatic transmission to
position N
i Deactivate the automatic locking feature
(Y page 161) You could otherwise be
locked out when pushing or towing the
vehicle. Towing eyes
Towing eyes, front :
Towing eyes, front
Towing eye, rear The rear towing eye is located under the
bumper,
on

the left-hand side when viewed in
the direction of travel. Towing and tow-starting
235
Breakdown assistance Z

:
Towing eye, rear Towing a vehicle with both axles on
the ground
It is important that you observe the safety
instructions when towing away your vehicle
(Y page 235). G
WARNING
The power assistance for the steering and the
brake force booster do not work when the
engine is not running. You will then need
much more effort to brake and steer the
vehicle. Adapt your style of driving
accordingly.
X Switch on the hazard warning lamps
(Y page 91).
i When towing with the hazard warning
lamps switched on, use the combination
switch as usual to signal a change of
direction. In
this case, only the turn signals
for the desired direction flash. When the
combination switch is reset, the hazard
warning lamps start flashing again.
X Turn the SmartKey to position 2 in the
ignition lock.
X When the vehicle is stationary, depress the
brake pedal and keep it depressed.
X Shift the transfer case to neutral position
N (Y page 145).
X Shift the automatic transmission to
position N. X
Release the brake pedal.
X Release the parking brake.
i The transmission can only change gear if
the battery has sufficient charge.
If you

cannot move the selector lever to N,
the propeller shafts to the driven axles
must be removed. Transporting the vehicle
Use the towing eyes to pull the vehicle if it
needs to be transported on a trailer or
transporter ( Y page 235).
X Apply the parking brake.
X Turn the SmartKey to position 2 in the
ignition lock.
X Move the selector lever to N.
X Shift the transfer case to neutral position
N (Y page 145).
X Secure the towing cable to the towing eyes.
X Make sure that the vehicle cannot roll
away.
X Release the parking brake.
X Load the vehicle onto the transporter.
X Apply the parking brake.
X Shift the automatic transmission to
position P.
X Turn the SmartKey to position 0 in the
ignition lock and remove it.
X Secure the vehicle.
! Only lash

the vehicle down by the wheels
or wheel rims, not by parts of the vehicle
such as axle or steering components.
Otherwise, the vehicle could be damaged. Recovering a vehicle that has become
stuck
! Pull away smoothly, slowly, and in a
straight line

when pulling out a vehicle that
has become stuck. Excessive tractive
power could damage the vehicles. 236
Towing and tow-starting
Breakdown assistance

Before changing a fuse
X Park the vehicle and apply the parking
brake.
X Switch off all electrical consumers.
X Remove the SmartKey from the ignition
lock.
The fuses are located in various fuse boxes:
R main fuse box on the driver's side of the
dashboard
R fuse box in the front-passenger footwell
R fuse box in the transmission tunnel
R fuse box in the battery case
The fuse
allocation chart and the spare fuses
are in the main fuse box on the dashboard
(Y page 238).
You can find the fuse extractor in the vehicle
tool kit ( Y page 224). Dashboard fuse box
! Do not use a pointed object such as a
screwdriver to open the cover in the
dashboard. You could damage the
dashboard or the cover. X
Open the driver's door.
X To open:
pull cover
: outwards in the
direction of the arrow and remove it. Fuse box in the front-passenger
footwell
X
To open : remove screws :.
X Remove cover ; in the direction of the
arrow. X
Remove screws = .
X Remove cover ? in the direction of the
arrow.238
Fuses
Breakdown assistance

To make it easier to change the fuse, you can
fold fuse box
A down slightly:
X Remove screws B.
X Fold fuse box A down.Fuse box in the transmission tunnel
In order to access the fuse box, you have to
remove the stop clamps on the front-
passenger seat. G
WARNING
Do not drive the vehicle when the front end
stops are not correctly installed. Failure to
reinstall stops as indicated may result in
serious injury in certain frontal crashes.
Adjust the front passenger seat as far as
possible rearward from the dashboard when
the seat
is occupied. Comply with information
on occupant safety section.
The stop clamps are at the front of the guide
rails. Stop clamp of the right guide rail, reverse image
for the left
:
Stop clamp
; Spacing
X To remove the stop clamps: remove
both
stop clamps : of the front-passenger seat
guide rails using a screwdriver.
! When replacing the stop clamps, make
sure you maintain the correct spacing. X
To open the fuse box: move the front-
passenger seat to its foremost position.
X Remove screws :.
X Remove cover ; in the direction of the
arrow. Fuse box in the battery case
The battery case is under a cover in the rear
footwell.
The fuses in the battery case do not usually
need to be replaced. If a fuse change is
necessary, consult a qualified specialist
workshop.
! The cover must be positioned properly.
Moisture or

dirt could otherwise impair the
operation of the fuses. Fuses
239
Breakdown assistance Z

Maximum tire load
The maximum tire load is the maximum
permissible weight in kilograms or lbs for
which a tire is approved. Maximum permissible tire pressure
Maximum permissible tire pressure for one
tire. Maximum load on one tire
Maximum load on one tire. This is calculated
by dividing
the maximum axle load of one axle
by two. PSI (pounds per square inch)
Standard unit of measurement for tire
pressure. Aspect ratio
Relationship between tire height and tire
width in percent. Tire pressure
This is pressure inside the tire applying an
outward force to every square inch of the
tire's surface.

The tire pressure is specified in
pounds per square inch (psi), in kilopascal
(kPa) or in bar. The tire pressure should only
be corrected when the tires are cold. For this,
the vehicle must have been stationary for at
least 3 hours or not have traveled more than
1.6 km (1 mile) in this time. Tire tread
The part of the tire that comes into contact
with the road. Tire bead
The tire bead ensures that the tire sits
securely on

the wheel. There are several steel
wires in the bead to prevent the tire from
coming loose from the wheel rim. Sidewall
The part

of the tire between the tread and the
tire bead. Weight of optional extras
The combined

weight of those optional extras
that weigh more than the replaced standard
part and more than 2.3 kg (5 lbs). These
optional extras, such as high-performance
brakes, level control, a roof rack or a high-
performance battery, are not included in the
curb weight and the weight of the
accessories. TIN (Tire Identification Number)
This is a unique identification number which
can be

used by a tire manufacturer to identify
tires, for example for a product recall, and
thus identify the purchasers. The TIN is made
up of the manufacturer's identity code, tire
size, tire type code and the manufacturing
date. Load bearing index
The load bearing index (also load index) is a
code that

contains the maximum load bearing
capacity of a tire. Traction
Traction is the result of friction between the
tires and the road surface. 264
Definition of terms for tires and loading
Wheels and tires