2015 MERCEDES-BENZ G-Class change key battery

The SmartKey centrally locks/unlocks:
R the doors
R the rear door
R the fuel filler flap
i The turn signals flash once when unlock-
ing and three times when locking.
You can also set an audible signal to confirm that the vehicle has been locked. The audiblesignal can be activated and deactivated using
the on-board computer (Y page 208).
When it is dark, the surround lighting also
comes on if it is activated in the on-board
computer (Y page 207). Changing the settings of the locking
system
You can change the setting of the locking
system in such a way that only the driver's
door and the fuel filler flap are unlocked. This
is useful if you frequently travel on your own.
i If the setting of the locking system is
changed within the signal range of the vehi- cle, pressing the &or% button locks
or unlocks the vehicle.
X To change the setting: press and hold
down the %and& buttons simulta-
neously for approximately six seconds until
battery check lamp :flashes twice. The SmartKey now functions as follows:
X To unlock the driver's door and fuel
filler flap: press the%button once.
X To unlock centrally: press the%but-
ton twice.
X To lock centrally: press the&button. Restoring the factory settings
X
Press the %and& buttons simulta-
neously for approximately six seconds until battery check lamp :flashes twice. Mechanical key
General notes If the vehicle can no longer be unlocked with
the SmartKey, use the mechanical key.
If you use the mechanical key to unlock and
open the driver's door or the rear door, the
anti-theft alarm system will be triggered
(Y page 66).
X To end the alarm: insert the SmartKey into
the ignition lock. SmartKey
69Opening and closing Z

Removing the mechanical key
:
Release catch
; Mechanical key
X Push release catch :in the direction of
the arrow and at the same time remove
mechanical key ;from the SmartKey. SmartKey battery
Important safety notes G
WARNING
Batteries contain toxic and corrosive substan- ces. If batteries are swallowed, it can result in
severe health problems. There is a risk of fatal injury.
Keep batteries out of the reach of children. If
a battery is swallowed, seek medical attention immediately.
The SmartKey batteries contain perchlorate
material, which may require special handling
and regard for the environment. Check your
national disposal guidelines. In California, see
www.dtsc.ca.gov/HazardousWaste/
Perchlorate/index.cfm.
Mercedes-Benz recommends that you have
the batteries replaced at a qualified specialist workshop. Checking the battery
X
Press the &or% button.
The battery is working properly if battery
check lamp :lights up briefly.
If battery check lamp :does not light up
during the test, the battery is discharged.
X Change the battery (Y page 70).
i You can obtain a battery at any qualified
specialist workshop.
i Have the batteries replaced at a qualified
specialist workshop.
i If the SmartKey battery is checked within
the signal reception range of the vehicle,
pressing the &or% button:
R locks or
R unlocks the vehicle
Replacing the battery You require a CR 2025 3 V cell battery.
X Take the mechanical key out of the Smart-
Key (Y page 70). 70
SmartKeyOpening and closing

Problems with the SmartKey
Problem
Possible causes/consequences and
M
MSolutions You cannot lock or
unlock the vehicle
using the SmartKey. The SmartKey battery is discharged or nearly discharged.
X Point the tip of the SmartKey at the driver's door handle from a
distance of approximately 1.5 ft (50 cm) and try to unlock or lock
the vehicle again.
If this does not work: X Check the SmartKey battery (Y page 70) and replace it if nec-
essary (Y page 70).
X Unlock (Y page 75) or lock (Y page 75) the vehicle using the
mechanical key. The SmartKey is faulty.
X Lock or unlock the vehicle using the mechanical key
(Y page 75).
X Have the SmartKey checked at a qualified specialist workshop. You have lost a Smart-
Key. X
Have the SmartKey deactivated at a qualified specialist work-
shop.
X Report the loss immediately to the vehicle insurers.
X If necessary, have the locks changed as well. You have lost the
mechanical key. X
Report the loss immediately to the vehicle insurers.
X If necessary, have the locks changed as well. The engine cannot be
started using the
SmartKey. The SmartKey has been in position
0(Y page 133) for a consid-
erable time.
X Remove the SmartKey and reinsert it into the ignition lock.
X Start the engine. The on-board voltage is too low.
X Switch off non-essential consumers, e.g. seat heating or interior
lighting, and try to turn the SmartKey again.
If this does not work:
X Check the battery and charge it if necessary (Y page 295).
or
X Jump-start the vehicle (Y page 296).
or
X Consult a qualified specialist workshop. 72
SmartKeyOpening and closing

i
When re-installing trim panel
?, make
sure that retainer Aengages in recess B.
Removing the spare wheel The spare wheel is heavy. Take particular note
of this when removing the spare wheel. X
Remove wheel nuts :.
X Remove the spare wheel.
Mounting the wheel After changing a wheel:
X Repair or replace the damaged wheel as
soon as possible and secure the spare
wheel in place again.
X Secure the damaged wheel on the spare
wheel bracket with wheel nuts :. When
doing so, make sure that the wheel cannot
come loose.
X When re-installing trim panel ?, make sure
that retainer Bengages in recess A
(Y page 291). X
Make sure that tab ;is below when re-
installing cover ring :(Ypage 291).
X For safety reasons, regularly check to
ensure that the wheel is securely fastened. Flat tire
Preparing the vehicle
X Stop the vehicle on solid, non-slippery and
level ground, as far away as possible from
traffic.
X Switch on the hazard warning lamps
(Y page 104).
X Apply the parking brake.
X Bring the front wheels into the straight-
ahead position.
X Move the selector lever to position P.
X Switch off the engine.
X Remove the SmartKey from the ignition
lock.
The steering wheel lock stays active for as
long as the SmartKey is removed.
X All occupants must get out of the vehicle.
Make sure that they are not endangered as they do so.
X Make sure that no one is near the danger
area while a wheel is being changed. Any-
one who is not directly assisting in the
wheel change should, for example, stand
behind the barrier.
X Get out of the vehicle. Pay attention to traf-
fic conditions when doing so.
X Close the driver's door. Battery (vehicle)
Important safety notes
Special tools and expert knowledge are
required when working on the battery, e.g.
removal and installation. You should there-
fore have all work involving the battery car-
ried out at a qualified specialist workshop. 292
Battery (vehicle)Roadside Assistance

!
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 auto-
matic transmission. Therefore, you must
not have the vehicle tow-started. The trans-
mission may otherwise be damaged.
i Details on the permissible gross vehicle
weight of your vehicle can be found on the
vehicle identification plate (Y page 336).
It is better to have the vehicle transported
than to have it towed away.
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 1in the igni-
tion lock (Y page 133).
The battery must be connected and charged.
Otherwise, you:
R cannot turn the SmartKey to position 2in
the ignition lock (Y page 133).
R cannot shift the automatic transmission to
position N.
i Disarm the automatic locking feature
before the vehicle is towed (Y page 75). You
could otherwise be locked out when push-
ing or towing the vehicle. Towing eyes
Towing eyes, front :
Towing eyes, front
Towing eye, rear Rear towing eye
:is located under the
bumper, on the left-hand side when viewed in
the direction of travel. 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 298).
X Switch on the hazard warning lamps
(Y page 104).
i In order to signal a change of direction
when towing the vehicle with the hazard
warning lamps switched on, use the com-
bination switch as usual. In this case, only
the turn signals for the desired direction
flash. When you reset the combination Towing and tow-starting
299Roadside Assistance Z

switch, the hazard warning lamps start
flashing again.
X Turn the SmartKey to position 2in the igni-
tion lock (Y page 133).
X When the vehicle is stationary, depress the
brake pedal and keep it depressed.
X Shift the transfer case to neu-
tral(Y page 188).
X Shift the automatic transmission to posi-
tion N.
X Release the brake pedal.
X Release the parking brake (Y page 151).
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
! You may only secure the vehicle by the
wheels, not by parts of the vehicle such as
axle or steering components. Otherwise,
the vehicle could be damaged.
Use the towing eyes to pull the vehicle if it
needs to be transported on a trailer or trans-
porter (Y page 299).
X Apply the parking brake.
X Turn the SmartKey to position 2in the igni-
tion lock (Y page 133).
X Move the selector lever to N.
X Shift the transfer case to neutral
(Y page 188).
X Secure the towing cable to the towing eyes
(Y page 299).
X Make sure that the vehicle cannot roll
away.
X Release the parking brake.
X Load the vehicle onto the transporter. As soon as the vehicle has been loaded:
X Apply the parking brake.
X Shift the automatic transmission to posi-
tion P.
X Turn the SmartKey to position 0in the igni-
tion lock (Y page 133) and remove it.
X Secure the vehicle. Recovering a vehicle that has become
stuck
! When recovering a vehicle that has
become stuck, pull it as smoothly and
evenly as possible. Excessive tractive
power could damage the vehicles.
If the drive wheels have become stuck in
loose or muddy ground, pull the vehicle out
with extreme caution, especially so if the vehi-
cle is loaded.
Never attempt to recover a stuck vehicle with
a trailer attached.
Pull out the vehicle backwards, if possible
using the tracks it made when it became
stuck. Towing in the event of malfunctions
General notes !
If you are removing the propeller shaft,
use M10 nuts as spacers on the M8 bolts
and secure them with M8 nuts.
New self-locking nuts must be used when
the propeller shafts are refitted.
X Observe the safety notes as you do so
(Y page 298).
i Consult an authorized Mercedes-Benz
Center. 300
Towing and tow-startingRoadside Assistance