2014 MERCEDES-BENZ G-CLASS SUV maintenance

Useful information
i These operating instructions describe all
the standard and optional equipment of
your COMAND system, as available at the
time of going to print. Country-specific
differences are possible. Please note that
your COMAND system may not be
equipped with all the features described.
This also applies to safety-related systems
and functions.
i Read the information on qualified
specialist workshops: (Y page 27).General notes
The COMAND section in these operating
instructions describes the basic principles for
operating your COMAND and the online and
Internet functions. More information can be
found in the Digital Operator's Manual.
The COMAND section in these operating
instructions describes the basic principles for
operating your COMAND. More information
can be found in the Digital Operator's Manual. Important safety notes
G
WARNING
Making alterations to electronic components
can cause malfunctions.
Radio, satellite radio, amplifier, DVD changer,
navigation module, phone and voice control
are networked. If one component is not
functional or if it has been incorrectly
removed/replaced, this could impair the
operation of other components.
This could seriously jeopardize the
operational safety of your vehicle.
We recommend that you always have
maintenance work on electronic components
carried out at an authorized Mercedes-Benz
Center. G
WARNING
In order to avoid distraction which could lead
to an accident, the driver should only enter
system settings with the vehicle at a standstill
and operate the system only when road,
weather and traffic conditions permit.
Bear in mind that at a speed of only 30 mph
(approximately 50 km/h), the vehicle covers
a distance of 44 feet (approximately 14 m) per
second.
COMAND delivers information to simplify
your choice of route and guide you
comfortably and safely to your destination.
For safety reasons, we recommend that you
bring your vehicle to a standstill, paying
attention to road and traffic conditions,
before making or accepting a telephone call
or viewing navigation maps, instructions or
downloaded information on the COMAND
screen. G
WARNING
While the navigation system provides
directional assistance, the driver must remain
focused on safe driving behavior, especially
attention to traffic and street signs, and
should utilize the system's audio cues while
driving.
The navigation system does not supply any
information on stop signs, yield signs, traffic
regulations or traffic safety rules. Their
observance always remains in the driver's
personal responsibility. DVD maps do not
cover all areas nor all routes within an area. G
WARNING
This equipment complies with FCC radiation
exposure limits set forth for uncontrolled
equipment and meets the FCC radio
frequency (RF) Exposure Guidelines in
Supplement C to OET65.
This equipment has very low levels of RF
energy that is deemed to comply without
maximum permissive exposure evaluation
(MPE). But it is desirable that it should be
installed and operated with at least 8inches 170
Important safety notesCOMAND

Do not tamper with or repair cargo tie-down
point, cargo tie down rings or tie downs. Have
maintenance work as well as modifications,
installations and conversions carried out at a
qualified specialist workshop (Y page 27).
Observe the following notes on securing
loads:
R Secure the load using the cargo tie-down
rings.
R Do not use elastic straps or nets to secure
a load, as these are only intended as an
anti-slip protection for light loads.
R Do not route tie-downs across sharp edges
or corners.
R Pad sharp edges for protection.
R Only use tie downs that have been checked
in accordance with applicable standards,
e.g. lashing nets or lashing straps.
R Fill the spaces between the load and the
cargo compartment walls and the wheel
mountings in a form-locking way. Only use
dimensionally stable transportation aids
for this, such as chocks, wooden fixings or
padding.
Cargo tie-down rings in the cargo
compartment There are four cargo tie down rings
:in the
cargo compartment mounted at the sides. Cargo compartment cover
Important safety notes !
When loading the vehicle, make sure that
you do not stack the load in the cargo
compartment higher than the lower edge of
the side windows. Do not place heavy
objects on top of the cargo compartment
cover.
The cargo compartment cover is located
behind the rear bench seat backrest.
Opening and closing the cargo
compartment cover X
To open: pull cargo compartment
cover :back and clip it into the retainers
on the left and right of the rear door.
X To close: unclip cargo compartment
cover :and guide it forwards until it is
completely rolled up.
Installing/removing the cargo
compartment cover 188
Sto
wage areasStowage an d features

Useful information
............................200
Engine compartment ........................200
Maintenance ...................................... 204
Care .................................................... 206 199Maintenance and care

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 27).Engine compartment
Hood
Important safety notes G
WARNING
If the hood is unlatched, it may open up when
the vehicle is in motion and block your view.
There is a risk of an accident.
Never unlatch the hood while driving. G
WARNING
Certain components in the engine
compartment may be very hot, e.g. the drive
system and radiator. Working in the engine
compartment poses a risk of injury.
If possible, let the drive system cool down and
only touch the following described
components. G
WARNING
Opening the hood when the engine is
overheated or when there is a fire in the
engine compartment could expose you to hot
gases or other service products. There is a
risk of injury.
Let an overheated engine cool down before
opening the hood. If there is a fire in the
engine compartment, keep the hood closed
and contact the fire department. G
WARNING
The engine compartment contains moving
components. Certain components, such as
the radiator fan, may continue to run or start
again suddenly when the ignition is off. There
is a risk of injury.
If you need to do any work inside the engine
compartment:
R switch off the ignition
R never reach into the area where there is a
risk of danger from moving components,
such as the fan rotation area
R remove jewelery and watches
R keep items of clothing and hair, for
example, away from moving parts G
WARNING
The engine is equipped with a transistorized
ignition system. Because of the high voltage,
it is dangerous to touch any components
(ignition coils, spark plug sockets, diagnostic
socket) of the ignition system:
R with the engine running
R while starting the engine
R when the ignition is switched on and the
engine is turned manually G
WARNING
When the hood is open and the windshield
wipers are set in motion, you can be injured
by the wiper linkage. There is a risk of injury.
Always switch off the windshield wipers and
the ignition before opening the hood.
! Make sure that the windshield wipers are
not folded away from the windshield. You
could otherwise damage the windshield
wipers or the hood.
Do not touch the following when the ignition
is switched on:
R ignition coils
R spark plug connectors
R test socket 200
Engine compartmentMaintenance and care

Opening the hood
The release lever on the hood is in the footwell
on the left-hand side of the vehicle when
viewed in the direction of travel.
X Make sure that the windshield wipers are
turned off.
X Pull release lever :on the hood.
The hood is released. X
Lift the hood slightly.
X Push hood catch handle ;in the direction
of the arrow and lift the hood.
Closing the hood G
WARNING
If the hood is unlatched, it may open up when
the vehicle is in motion and block your view.
There is a risk of an accident.
Never unlatch the hood while driving. X
Lower the hood and let it fall from a height
of approximately 8 inches (20 cm).
X Check that the hood has engaged properly.
If the hood can be raised slightly, it is not
properly engaged. Open it again and close
it with a little more force. Engine oil
Notes on the oil level Depending on your driving style, the vehicle
consumes up to 0.9 US qt (0.8 liters) of oil per
600 miles (1000 km). The oil consumption
may be higher than this when the vehicle is
new or if you frequently drive at high engine
speeds.
Checking the oil level using the oil
dipstick
Example: oil dipstick
When checking the oil level:
R
park the vehicle on a level surface.
R the engine should be switched off for
approximately five minutes if the engine is
at normal operating temperature.
R the engine should be switched off for at
least 30 minutes if the engine is not at
operating temperature, e.g. if you only start
the engine briefly.
X Pull oil dipstick :out of the dipstick guide
tube.
X Wipe off oil dipstick :. Engine compartment
201Maintenance and care Z

X
Slowly slide oil dipstick :into the guide
tube to the stop, and take it out again.
If the level is between MIN mark =and
MAX mark ;, the oil level is correct.
X Add oil if necessary.
Checking the oil level using the on-
board computer !
Do not add too much oil. adding too much
engine oil can result in damage to the
engine or to the catalytic converter. Have
excess engine oil siphoned off.
G 65 AMG: the oil level can be checked using
the on-board computer only.
On all other models, the oil dipstick must be
used to check the engine oil level.
When checking the oil level:
R park the vehicle on a level surface.
R the engine should be switched off for
approximately five minutes if the engine is
at normal operating temperature.
X Make sure that the SmartKey is in position
2in the ignition lock.
X Press the &or* button on the
steering wheel to select the following
message: The measurement takes a few seconds. You
will see one of the following messages in the
multifunction display:
R Engine Oil Level OK Engine Oil Level OK
R Add 1.0 qt
Add 1.0 qt (Canada:1.0 liter
1.0 liter) to
to
reach maximum oil level.
reach maximum oil level.
R Add 1.5 qts
Add 1.5 qts (Canada:1.5 liters
1.5 liters )to
to
reach maximum oil level.
reach maximum oil level.
R Add
Add 2.0 qts.
2.0 qts. (Canada:2.0 liters
2.0 liters )to
to
reach maximum oil level.
reach maximum oil level. X
Add oil if necessary.
If the engine is at normal operating
temperature and the Engine oil Reduce
Engine oil Reduce
oil oil level
level display appears, too much oil has
been added.
X Have excess oil siphoned off.
If the Switch on ignition to check
Switch on ignition to check
engine oil level engine oil level message appears:
X Turn the SmartKey to position 2in the
ignition lock (Y page 97).
If the Observe waiting time
Observe waiting time message
appears:
X If the engine is at normal operating
temperature: repeat the measurement
after about five minutes.
X If the engine is not at normal operating
temperature: e.g. if the engine was only
started briefly, repeat the measurement
after approximately 30 minutes.
If the Engine oil level Not when
Engine oil level Not when
engine on engine on message appears:
X Switch off the engine.
X If the engine is at normal operating
temperature: wait about five minutes
before carrying out the measurement.
X If the engine is not at normal operating
temperature: e.g. if the engine was only
started briefly, wait approximately
30 minutes before carrying out the
measurement.
i If you wish to cancel the measurement,
press the *or& button on the
multifunction steering wheel.
Adding engine oil H
Environmental note
When adding oil, take care not to spill any. If
oil enters the soil or waterways, it is harmful
to the environment.
! Only use engine oils and oil filters that
have been approved for vehicles with a
service system. You can obtain a list of the 202
Engine compartmentMaintenance and care

engine oils and oil filters tested and
approved in accordance with the
Mercedes-Benz Specifications for Service
Products at any Mercedes-Benz Service
center.
Damage to the engine or exhaust system is
caused by the following:
R using engine oils and oil filters that have
not been specifically approved for the
service system
R replacing engine oil and oil filters after
the interval for replacement specified by
the service system has been exceeded
R using engine oil additives.
! Do not add too much oil. If the oil level is
above the "max" mark on the dipstick, too
much oil has been added. This can lead to
damage to the engine or the catalytic
converter. Have excess oil siphoned off. Example: engine oil cap
X
Turn cap :counter-clockwise and remove
it.
X Add the amount of oil required.
Observe the specifications in the on-board
computer when doing so or fill carefully to the
maximum mark on the oil dipstick.
Further information on engine oil
(Y page 261).
i The difference between the minimum
mark and the maximum mark on the oil
dipstick is approximately 2.1 US qt (2 l).X
Replac e cap:on the filler neck and
tighten clockwise.
Ensure that the cap locks into place
securely. Additional service products
Checking coolant level G
WARNING
The engine cooling system is pressurized,
particularly when the engine is warm. When
opening the cap, you could be scalded by hot
coolant spraying out. There is a risk of injury.
Let the engine cool down before opening the
cap. Wear eye and hand protection when
opening the cap. Open the cap slowly half a
turn to allow pressure to escape. X
Park the vehicle on a level surface.
Only check the coolant level when the
vehicle is on a level surface and the engine
has cooled down.
X Turn the SmartKey to position 2in the
ignition lock (Y page 97).
X Check the coolant temperature display in
the instrument cluster.
The coolant temperature must be below
158 ‡ (70 †).
X Slowly turn cap :half a turn counter-
clockwise to allow excess pressure to
escape. Engine compartment
203Maintenance and care Z

X
Turn cap :further counter-clockwise and
remove it.
If the coolant is at the level of marker bar
= in the filler neck when cold, there is
enough coolant in coolant expansion
tank ;.
If the coolant level is approximately 0.6 in
(1.5 cm) above marker bar =in the filler
neck when warm, there is enough coolant
in expansion tank ;.
X If necessary, add coolant that has been
tested and approved by Mercedes-Benz.
X Replace cap :and turn it clockwise as far
as it will go.
For further information on coolant, see
(Y page 262).
Adding washer fluid to the windshield
washer system/headlamp cleaning
system G
WARNING
Windshield washer concentrate is highly
flammable. If it comes into contact with hot
engine components or the exhaust system it
could ignite. There is a risk of fire and injury.
Make sure that no windshield washer
concentrate is spilled next to the filler neck. Example: washer fluid reservoir
X
To open: pull cap:upwards by the tab.
X Add the premixed washer fluid.
X To close: press cap :onto the filler neck
until it engages. Further information on windshield washer
fluid/antifreeze (Y
page 263).
Brake fluid level !
If you notice that the brake fluid level in
the brake fluid reservoir has fallen to the
MIN mark or less, check the brake system
immediately for leaks. Also check the
thickness of the brake linings. Visit a
qualified specialist workshop immediately.
Do not add brake fluid. This does not
correct the error. Only check the brake fluid level when the
vehicle is on a level surface.
If the brake fluid level is between MIN
mark
:and MAX mark ;on the brake fluid
reservoir, it is correct. Maintenance
Service interval display
Service messages Information on the type of service and service
intervals (see the separate Maintenance
Booklet).
You can obtain further information from an
authorized Mercedes-Benz Center or at
http://www.mbusa.com (USA only).
The ASSYST service interval display informs
you of the next service due date.
If a service due date has been exceeded, you
also hear a warning tone.204
MaintenanceMaintenance and care