2011 MERCEDES-BENZ G-CLASS key battery

Only shift the automatic transmission to
the desired drive position when the vehicle
is stationary.
Where possible, avoid spinning the drive
wheels when pulling away on slippery
roads. You could otherwise damage the
drive train.
! Avoid high engine speeds when the
engine is cold. The engine's service life
could otherwise be significantly shortened.
Do not use the engine's full performance
until it has reached operating temperature.
SmartKey positions
gTo remove the SmartKey1Power supply for some consumers, such
as the windshield wipers2Ignition (power supply for all consumers)
and drive position3To start the engine
i You can only remove the SmartKey if:
R the SmartKey is in position 0 in the
ignition lock.
R the automatic transmission selector
lever is in P.
As soon as the ignition is switched on, all the
indicator lamps in the instrument cluster light
up. If an indicator lamp does not go out after
the engine is started or if it lights up while the
vehicle is in motion, see ( Y page 183).
If the SmartKey is in position 0 in the ignition
lock for an extended period of time, it can no
longer be turned in the ignition lock. The
steering is then locked. To unlock, remove the
SmartKey and reinsert it into the ignition lock.
The steering is locked when you remove the
SmartKey from the ignition lock.XRemove the SmartKey when the engine is
switched off.
The starter battery could otherwise be
discharged.
If you cannot turn the SmartKey in the ignition
lock, the starter battery may not be charged
sufficiently.
XCheck the starter battery and charge if
necessary ( Y page 236).
or
XJump-start the vehicle ( Y page 238).
Starting the engine
Important safety notes
GWarning
Inhalation of exhaust gas is hazardous to your
health. All exhaust gas contains carbon
monoxide (CO), and inhaling it can cause
unconsciousness and possible death.
Do not run the engine in confined areas (such
as a garage) which are not properly ventilated.
If you think that exhaust gas fumes are
entering the vehicle while driving, have the
cause determined and corrected
immediately. If you must drive under these
conditions, drive only with at least one
window fully open at all times.
! Do not depress the accelerator pedal
when starting the engine.
Starting procedure
XShift the automatic transmission to
position P.
The transmission position display in the
multifunction display shows P.Driving117Driving and parkingZProCarManuals.com

Problems with the engineProblemPossible causes/consequences and M SolutionsThe engine does not
start. The starter motor
can be heard.R There is a malfunction in the engine electronics.
R There is a malfunction in the fuel supply.XTurn the SmartKey back to position 0 in the ignition lock before
attempting to start the engine again.XTry to start the engine again ( Y page 117). Avoid excessively
long and frequent attempts to start the engine as these will drain
the battery.
If the engine does not start after several attempts:
XConsult a qualified specialist workshop, e.g. an authorized
Mercedes-Benz Center.The engine does not
start. The starter motor
can be heard. The
reserve fuel warning
lamp is on. The needle
of the fuel gauge is
pointing to the reserve
range and does not
drop any further.The fuel tank is empty.XRefuel the vehicle.The engine does not
start. You cannot hear
the starter motor.The on-board voltage is too low because the starter battery is too
weak or discharged.XJump-start the vehicle ( Y page 238).
If the engine does not start despite attempts to jump-start it:
XConsult a qualified specialist workshop, e.g. an authorized
Mercedes-Benz Center.The starter motor was exposed to a thermal load that was too high.XAllow the starter motor to cool down for approximately two
minutes.XTry to start the engine again.
If the engine still does not start:
XConsult a qualified specialist workshop, e.g. an authorized
Mercedes-Benz Center.120DrivingDriving and parking
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Rturn the SmartKey in the ignition lock to
position 0 and remove the SmartKey from
the ignition lock.
R take the SmartKey with you and lock the
vehicle when leaving.
Switching off the engine
GWarning
Do not turn off the engine before the vehicle
has come to a complete stop. With the engine
not running, there is no power assistance for
the brake and steering systems. In this case,
it is important to keep in mind that a
considerably higher degree of effort is
necessary to brake and steer the vehicle.
GWarning!
Keep in mind that turning off the engine alone
only will shift AUTOTRONIC into neutral
position N automatically.
Always shift AUTOTRONIC into park position
P before turning off the engine.
Otherwise the vehicle could roll away which
could result in an accident and/or serious
personal injury.
XShift the transmission to position P.XTurn the SmartKey to position 0 in the
ignition lock and remove it.
The immobilizer is activated.XApply the parking brake firmly.
i The SmartKey can only be removed if the
automatic transmission is in position P.
Parking brake
GWarning
Engaging the parking brake while the vehicle
is in motion can cause the rear wheels to lock
up. You could lose control of the vehicle and
cause an accident. In addition, the vehicle's
brake lights do not light up when the parking
brake is engaged.
GWarning!
When leaving the vehicle, always remove the
SmartKey from the starter switch, take it with
you, and lock the vehicle. Do not leave
children unattended in the vehicle, or with
access to an unlocked vehicle. Children could
release the parking brake and/or shift the
automatic transmission out of park position
P , either of which could result in an accident
and/or serious personal injury.
XTo apply: pull parking brake ; up firmly.
When the engine is running, the $ (USA
only) or J (Canada only) indicator lamp
lights up in the instrument cluster.XTo release: depress the brake pedal and
keep it depressed.
The selector lever lock is released.XPull parking brake ; up firmly.XPress release button : on parking
brake ; and move the parking brake down
to the stop.
When the ignition is switched on or the
engine is running, the $ (USA only) or
J (Canada only) indicator lamp goes out
in the instrument cluster.
Parking up the vehicle
If you leave the vehicle parked up for longer
than four weeks, the battery may be damaged
by exhaustive discharge.
Parking135Driving and parkingZProCarManuals.com

frequent insertion and removal or by
sockets that do not fit correctly. A damaged
socket can cause the cigarette lighter to
stop working.XPress cover ; and then release it.
The ashtray and cigarette lighter : fold
out.XPress in cigarette lighter :.
Cigarette lighter : will pop out
automatically when the heating element is
red-hot.
12 V sockets
Points to observe before use
! If you are using all sockets in the vehicle,
make sure that you do not exceed the
maximum current draw of 45 A. Otherwise,
you will overload the fuses.
The sockets can be used for accessories with
a maximum power consumption of 180 W (15
A), e.g. lamps or for mobile phones.
If you use the sockets for long periods when
the engine is switched off, the battery may
discharge.
XTurn the key to position 2 in the ignition
lock.Socket in the front-passenger footwellXLift up the cover of the socket.
The cigarette lighter socket can be also used
( Y page 199). It can also be used if the key
has been removed from the ignition lock.
Socket in the rear compartment
The socket is located on the center console
in the rear compartment.
XLift up the cover of the socket.
Socket in the cargo compartment
The socket is located in the cargo
compartment on the left-hand-side, next to
the rear door.
200FeaturesLoading, stowing and features
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GWarning
Failure to follow these instructions can result
in severe injury or death.
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 produce hydrogen gas,
which is flammable and explosive. Keep
flames or sparks away from battery, avoid
improper connection of jumper cables,
smoking etc.
GWarning
Do not place any metal objects on the battery
as this could result in a short circuit.
Use leak-proof batteries only to avoid the risk
of acid burns in the event of an accident.
Take care that you do not become statically
charged, e.g. by wearing synthetic clothing or
rubbing against textiles. For this reason, you
also should not pull or push the battery over
carpets or other synthetic materials.
Never touch the battery first. First, touch the
outside body of the vehicle in order to release
any possible electrostatic charges.
Do not rub the battery with rags or cloths. The
battery could explode if touched due to
electrostatic charge or due to spark
formation.
! Switch off the engine and remove the
SmartKey before disconnecting the
terminal clamps from the battery. You may
otherwise destroy electronic components,
such as the alternator.
! Like other batteries, the vehicle battery
may discharge over time if you do not use
the vehicle. In this case, have the battery
disconnected at a qualified specialist
workshop, e.g. an authorized Mercedes-
Benz Center. You can also charge the
battery with a charger recommended by
Mercedes-Benz. Contact an authorized
Mercedes-Benz Center for further
information.
The battery, breather hose and cover of the
positive terminal clamp must be installed
securely during operation.
i Remove the SmartKey if you park the
vehicle and do not require any electrical
consumers. The vehicle will then use very
little energy, thus conserving battery
power.
Mercedes-Benz recommends that you do not
carry out work on batteries yourself, e.g.
removing, charging or replacing. Always have
this work performed at a qualified specialist
workshop, e.g. an authorized Mercedes-Benz
Center.
i If the power supply has been interrupted,
e.g. if the battery has been reconnected,
you must carry out the following tasks:
R reset the head restraints on the front
seats ( Y page 80).
Charging the battery
GWarning
Never charge a battery while still installed in
the vehicle unless the accessory battery
charge unit approved by Mercedes-Benz is
being used. Gases may escape during
charging and cause explosions that may
result in paint damage, corrosion or personal
injury.
An accessory battery charge unit specially
adapted for Mercedes-Benz vehicles and
tested and approved by Mercedes-Benz is
available. It permits the charging of the
battery in its installed position. Contact an
authorized Mercedes-Benz Center for
information and availability.
Charge the battery in accordance with the
separate instructions for the accessory
battery charger.
236BatteryRoadside Assistance
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Towing and tow-starting
Important safety notes
GWarning
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 key to position 1 in the ignition
lock.
The battery must be connected and charged.
Otherwise, you:
R cannot turn the key in the ignition lock to
position 2
R cannot shift the automatic transmission to
position N
i Deactivate the automatic locking feature
( Y page 165) You could otherwise be
locked out when pushing or towing the
vehicle.
Towing eye
Towing eye, 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.
240Towing and tow-startingRoadside Assistance
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:Towing eye, rear
Towing the vehicle with both axles on
the ground
It is important that you observe the safety
instructions when towing away your vehicle
( Y page 240).
GWarning
With the engine not running, there is no power
assistance for the brake and steering
systems. In this case, it is important to keep
in mind that a considerably higher degree of
effort is necessary to brake and steer the
vehicle. Adapt your driving accordingly.
XSwitch on the hazard warning lamps
( Y page 93).
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.
XTurn the key to position 2 in the ignition
lock.XWhen the vehicle is stationary, depress the
brake pedal and keep it depressed.XShift the transfer case to neutral position
N (Y page 126).XShift the automatic transmission to
position N.XRelease the brake pedal.XRelease the parking brake.
i
The transmission can only change gear
when the battery has sufficient charge.
If you cannot move the selector lever to N,
you must remove the propeller shafts to the
driven axles.
Transporting the vehicle
Use the towing eyes to pull the vehicle if it
needs to be transported on a trailer or
transporter.
XTurn the key to position 2 in the ignition
lock.XMove the selector lever to N.XShift the transfer case to neutral position
N (Y page 126).
As soon as the vehicle is loaded:
XPrevent the vehicle from rolling away by
applying the parking brake.XShift the automatic transmission to
position P.XTurn the key in the ignition lock to position
0 and remove the key from the ignition
lock.XSecure 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.
If the drive wheels get trapped on loose or
muddy ground, recover the vehicle with the
utmost care, especially so if the vehicle is
laden.
Towing and tow-starting241Roadside AssistanceZProCarManuals.com

Before changing a fuseXPark the vehicle and apply the parking
brake.XSwitch off all electrical consumers.XRemove the key 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 243).
You can find the fuse extractor in the vehicle
tool kit ( Y page 229).
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.
XOpen the driver's door.XTo open: pull cover : outwards in the
direction of the arrow and remove it.Fuse box in the front-passenger
footwellXTo open : remove screws :.XRemove cover ; in the direction of the
arrow.XRemove screws =.XRemove cover ? in the direction of the
arrow.Electrical fuses243Roadside AssistanceZProCarManuals.com