1990-2018 Mercedes G Class SUV Opening and closing -> SmartKey User Manual
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Opening and closing -> SmartKey for Your Mercedes G Class SUV Third Generation (1990-2018)

Useful information
i
This Operator's Manual describes all
models and all standard and optional
equipment of your vehicle available at the
time of publication of the Operator's
Manual. Country-specific differences are
possible. Please note that your vehicle may
not be equipped with all features
described. This also applies to safety-
related systems and functions.
i
Read the information on qualified
specialist workshops: (Y page 24).
SmartKey
Important safety notes
G
WARNING
When leaving the vehicle, always remove the
SmartKey from the ignition lock. Always take
the SmartKey with you and lock the vehicle.
Do not leave children unsupervised in the
vehicle, even if they are secured in a child
restraint system, and do not give them access
to an unlocked vehicle. A child's unsupervised
access to a vehicle could result in an accident
and/or serious personal injury. They could:
R
injure themselves on vehicle parts
R
be seriously or fatally injured by extreme
heat or cold
R
injure themselves or have an accident with
vehicle equipment that may still be in
operation even after the SmartKey has
been removed from the ignition, such as the
seat adjustment, steering wheel
adjustment or memory function.
If children open a door, they could cause
severe or even fatal injury to other persons; if
they get out of the vehicle, they could injure
themselves when doing so or be seriously or
even fatally injured by any passing traffic.
Do not expose the child restraint system to
direct sunlight. The child restraint system's
metal parts, for example, could become very
hot, and a child could be burned on these
parts.
G
WARNING
Do not carry heavy or hard objects in the
passenger compartment or cargo
compartment unless they are firmly secured
in place.
Unsecured or improperly positioned cargo
increases a child's risk of injury in the event
of
R
strong braking maneuvers
R
sudden changes of direction
R
an accident
G
WARNING
If you attach heavy or large objects to the
SmartKey, the SmartKey could be
unintentionally turned in the ignition lock. This
could cause the engine to be switched off.
There is a risk of an accident.
Do not attach any heavy or large objects to
the SmartKey. Remove any bulky key rings
before inserting the SmartKey into the
ignition lock.
SmartKey functions
G
WARNING
If children are left unsupervised in the vehicle,
they could:
R
open the doors, thus endangering other
people or road users.
R
get out and disrupt traffic.
R
operate the vehicle's equipment.
Additionally, children could set the vehicle in
motion if, for example, they:
R
release the parking brake.
R
shift the automatic transmission out of
parking position P.
R
shift the manual transmission into neutral.
R
starting the engine.
There is a risk of an accident and injury.
68
SmartKey
Opening and closing
When leaving the vehicle, always take the
SmartKey with you and lock the vehicle. Never
leave children or animals unattended in the
vehicle. Always keep the SmartKey out of
reach of children.
:
& To lock the vehicle
;
% To unlock the vehicle
X
To unlock centrally: press the %
button.
If you do not open the vehicle within
approximately 40 seconds of unlocking:
R
the vehicle is locked again.
R
the theft deterrent locking system is
armed again.
X
To lock centrally: press the & button.
The SmartKey centrally locks/unlocks:
R
the doors
R
the rear door
R
the fuel filler flap
i
When unlocking, the turn signals flash
once. When locking, they flash three times.
You can also set an audible signal to confirm
that the vehicle has been locked. The audible
signal can be activated and deactivated using
the on-board computer (Y page 216).
When it is dark, the surround lighting also
comes on if it is activated in the on-board
computer (Y page 215).
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
vehicle, pressing the & or % button
locks or unlocks the vehicle.
X
To change the setting: press and hold
down the % and & buttons
simultaneously 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 %
button twice.
X
To lock centrally: press the & button.
SmartKey
69
Opening and closing
Z
Restoring the factory settings
X
Press the % and & buttons
simultaneously 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 65).
X
To end the alarm: insert the SmartKey into
the ignition lock.
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
substances. 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. National
guidelines must be observed during disposal.
In California, see v/
HazardousWaste/Perchlorate/
.
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.
70
SmartKey
Opening and closing
If battery check lamp : does not light up
during the test, the battery is discharged.
X
Change the battery (Y page 71).
i
You can get a battery in 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
SmartKey (Y page 70).
:
Battery compartment cover
;
Mechanical key
X
Press mechanical key ; into the opening
in the SmartKey in the direction of the
arrow until battery tray cover : opens. Do
not hold the cover closed while doing so.
X
Remove battery tray cover :.
=
Battery
X
Repeatedly tap the SmartKey against your
palm until battery = falls out.
X
Insert the new battery with the positive
terminal facing upwards. Use a lint-free
cloth to do so.
X
Make sure that the surface of the battery is
free from lint, grease and all other forms of
contamination.
X
Insert the front tabs of battery tray
cover : and then press to close it.
X
Insert the mechanical key into the
SmartKey.
X
Check the function of all SmartKey buttons
on the vehicle.
SmartKey
71
Opening and closing
Z
Problems with the SmartKey
Problem Possible causes/consequences and MM Solutions
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
necessary (Y page 71).
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
SmartKey.
X
Have the SmartKey deactivated at a qualified specialist
workshop.
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 139) for a
considerable 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 301).
or
X
Jump-start the vehicle (Y page 303).
or
X
Consult a qualified specialist workshop.
72
SmartKey
Opening and closing
Doors
Important safety notes
G
WARNING
When leaving the vehicle, always remove the
SmartKey from the ignition lock. Always take
the SmartKey with you and lock the vehicle.
Do not leave children unsupervised in the
vehicle, even if they are secured in a child
restraint system, and do not give them access
to an unlocked vehicle. A child's unsupervised
access to a vehicle could result in an accident
and/or serious personal injury. They could:
R
injure themselves on vehicle parts
R
be seriously or fatally injured by extreme
heat or cold
R
injure themselves or have an accident with
vehicle equipment that may still be in
operation even after the SmartKey has
been removed from the ignition, such as the
seat adjustment, steering wheel
adjustment or memory function.
If children open a door, they could cause
severe or even fatal injury to other persons; if
they get out of the vehicle, they could injure
themselves when doing so or be seriously or
even fatally injured by any passing traffic.
Do not expose the child restraint system to
direct sunlight. The child restraint system's
metal parts, for example, could become very
hot, and a child could be burned on these
parts.
G
WARNING
Do not carry heavy or hard objects in the
passenger compartment or cargo
compartment unless they are firmly secured
in place.
Unsecured or improperly positioned cargo
increases a child's risk of injury in the event
of
R
strong braking maneuvers
R
sudden changes of direction
R
an accident
G
WARNING
If children are left unsupervised in the vehicle,
they could:
R
open the doors, thus endangering other
people or road users.
R
get out and disrupt traffic.
R
operate the vehicle's equipment.
Additionally, children could set the vehicle in
motion if, for example, they:
R
release the parking brake.
R
shift the automatic transmission out of park
position P or shift manual transmission into
neutral.
R
start the engine.
There is a risk of an accident and injury.
When leaving the vehicle, always take the
SmartKey with you and lock the vehicle. Never
leave children or animals unattended in the
vehicle. Always keep the SmartKey out of
reach of children.
Unlocking and opening doors from
the inside
If the vehicle has previously been locked with
the SmartKey, opening a door from the inside
will trigger the anti-theft alarm system.
Switch off the alarm (Y page 65).
Only open the door when the traffic situation
permits.
Doors
73
Opening and closing
Z

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