2015 MERCEDES-BENZ G-CLASS SUV engine

Useful information
iThis Operator's Manual describes all
models and all standard and optional equip- ment 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.
iRead the information on qualified special-
ist workshops: ( Ypage 28).
Loading guidelines
GWARNING
If objects, luggage or loads are not secured or
not secured sufficiently, they could slip, tip
over or be flung around and thereby hit vehicle
occupants. There is a risk of injury, particu-
larly in the event of sudden braking or a sud-
den change in direction.
Always store objects so that they cannot be
flung around. Secure objects, luggage or
loads against slipping or tipping before the
journey.
GWARNING
If you distribute the load unevenly in the vehi- cle, the handling as well as the steering and
braking characteristics are severely affected.
There is a risk of an accident.
Distribute the load evenly in the vehicle.
Secure the load to prevent it from slipping.
GWARNING
The exhaust tail pipe and tail pipe trim can
become very hot. If you come into contact
with these parts of the vehicle, you could burn
yourself. There is a risk of injury.
Always be particularly careful around the
exhaust tail pipe and the tail pipe trim. Allow
these components to cool down before touch-
ing them.
GWARNING
Combustion engines emit poisonous exhaust
gases such as carbon monoxide. If the tail-
gate/rear door is open when the engine is
running, particularly if the vehicle is moving,
exhaust fumes could enter the passenger
compartment. There is a risk of poisoning.
Turn off the engine before opening the tail-
gate/rear door. Never drive off with the tail-
gate/rear door open.
Driving, braking and steering characteristics
change depending on:
R type of load
R weight
R the center of gravity of the load
You should therefore load your vehicle as
shown in the illustrations.
The gross vehicle weight (GVW) is the vehicle
weight including fuel, vehicle tool kit, spare
wheel, accessories installed, vehicle occu-
pants and luggage/load.
Do not exceed the load limit or permitted
gross vehicle weight rating (GVWR) for your
vehicle. The gross load limit and the GVWR
are specified on the vehicle identification
plate on the B-pillar of the driver's door( Y page 258).
The load must also be distributed so that the weight on each axle never exceeds the grossaxle weight rating (GAWR) for the front and
rear axles. The specifications for GVWR and
GAWR are on the vehicle identification plate
on the B-pillar of the driver's door( Y page 258).
192Loading guidelines
Stowage and features

Cargo compartment enlargement
Important safety notes
GWARNING
If the rear bench seat/rear seat and seat
backrest are not engaged they could fold for- wards, e.g. when braking suddenly or in the
event of an accident. R The vehicle occupant would thereby be
pushed into the seat belt by the rear bench
seat/rear seat or by the seat backrest. The
seat belt can no longer offer the intended
level of protection and could even cause
injuries.
R Objects or loads in the trunk/cargo com-
partment cannot be restrained by the seat
backrest.
There is an increased risk of injury.
Before every trip, make sure that the seat
backrests and the rear bench seat/rear seat
are engaged.
GWARNING
Combustion engines emit poisonous exhaust
gases such as carbon monoxide. If the rear
door is open when the engine is running, par- ticularly if the vehicle is moving, exhaust
fumes could enter the passenger compart-
ment. There is a risk of poisoning.
Turn off the engine before opening the rear
door. Never drive with the rear door open.
!Ensure that you remove all containers
from the cup holder in the rear before fold- ing the seat backrest and the seat cushionof the rear bench seat forwards.
Observe the loading guidelines ( Ypage 192).
The rear bench seat is split symmetrically.
The left-hand and right-hand rear bench seats
can be folded forward to increase the capa-
city of the rear compartment. The following
changes are possible:
R fold the seat backrests forward
R fold the rear bench seat back fully
Folding the seat backrest forward
To fold forward the seat backrests, proceed
as follows:
X Open the rear doors.
This allows you better access to release
lever :.
X Remove the center head restraint(Y page 84).
X Pull catch :in the direction of the arrow.
The corresponding rear seat backrest is not
engaged.
X Fold the backrest forwards.
The rear seat backrest engages audibly.
;Backrest folded forward
Folding the seat backrest back
!Make sure that the seat belt does not
become trapped when folding the rear seat backrest back. Otherwise, it could be dam- aged.
194Stowage areas
Stowage and features

Useful information............................204
Engine compartment ........................204
Maintenance ...................................... 209
Care .................................................... 211
203
Maintenance and care

Useful information
iThis Operator's Manual describes all
models and all standard and optional equip- ment 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.
iRead the information on qualified special-
ist workshops: ( Ypage 28).
Engine compartment
Hood
Important safety notes
GWARNING
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. Before
every trip, ensure that the hood is locked.
GWARNING
Certain components in the engine compart-
ment may be very hot, e.g. the drive system
and radiator. Working in the engine compart-
ment poses a risk of injury.
If possible, let the drive system cool down andonly touch the components described in the following.
GWARNING
Opening the hood when the engine is over-
heated 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.
GWARNING
The ignition system and the fuel injection sys-tem work under high voltage. If you touch
components which are under voltage, you
could get an electric shock. There is a risk of
injury.
Never touch components of the ignition sys-
tem or fuel injection system when the ignition is switched on.
GWARNING
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 jewelry and watches
R keep items of clothing and hair, for exam-
ple, away from moving parts
GWARNING
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
204Engine compartment
Maintenance and care

Opening the hood
The release lever on the hood is in the footwellon the left-hand side of the vehicle when
viewed in the direction of travel.
X Make sure that the windshield wipers are
switched off.
X Pull release lever :on the hood.
The hood is released.
X Lift the hood slightly.
X Push the handle of hood catch ;in the
direction of the arrow and lift the hood.
Closing the hood
GWARNING
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. Before
every trip, ensure that the hood is locked. 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
General notes
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 enginespeeds.
Checking the oil level using the oil dip-stick
GWARNING
Certain components in the engine compart-
ment, such as the engine, radiator and parts
of the exhaust system, can become very hot.
Working in the engine compartment poses a
risk of injury.
Where possible, let the engine cool down and touch only the components described in the following.
Example: oil dipstick
Engine compartment205
Maintenance and care
Z

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 :.
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 posi-tion 2in the ignition lock.
X Press the 9or: button on the steer-
ing 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
RAdd 1.0 qt(Canada:1.0 liter)to
reach maximum oil level
RAdd 1.5 qts(Canada:1.5 liters)to
reach maximum oil level
RAdd2.0 qts.(Canada:2.0 liters)to
reach maximum oil level
X Add oil if necessary.
If the engine is at normal operating tempera- ture and the
Engine oil Reduce oil
leveldisplay appears, too much oil has been
added.
X Have excess oil siphoned off.
If the
Switch ignition on to check
engine oil levelmessage appears:
X Turn the SmartKey to position 2in the igni-
tion lock ( Ypage 103).
If the
Observe waiting timemessage
appears:
X If the engine is at normal operating tem-
perature: repeat the measurement after
approximately 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 onmessage appears:
206Engine compartment
Maintenance and care

XSwitch off the engine.
X If the engine is at normal operating tem-
perature: 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 meas-
urement.
iIf you wish to cancel the measurement,
press the 9or: button on the mul-
tifunction steering wheel.
Adding engine oil
GWARNING
Certain components in the engine compart-
ment, such as the engine, radiator and parts
of the exhaust system, can become very hot.
Working in the engine compartment poses a
risk of injury.
Where possible, let the engine cool down and touch only the components described in the
following.
GWARNING
If engine oil comes into contact with hot com- ponents in the engine compartment, it may
ignite. There is a risk of fire and injury.
Make sure that engine oil is not spilled next to
the filler neck. Let the engine cool down and
thoroughly clean the engine oil off the com-
ponents before starting the engine.
HEnvironmental 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 ser-
vice system. You can obtain a list of the
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 con-
verter. 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 262).
iThe 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 placesecurely.
Engine compartment207
Maintenance and care
Z

Additional service products
Checking coolant level
GWARNING
Certain components in the engine compart-
ment, such as the engine, radiator and parts
of the exhaust system, can become very hot.
Working in the engine compartment poses a
risk of injury.
Where possible, let the engine cool down and touch only the components described in the
following.
GWARNING
The engine cooling system is pressurized, par-ticularly when the engine is warm. When
opening the cap, you could be scalded by hotcoolant 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 vehi-
cle is on a level surface and the engine has
cooled down.
X Turn the SmartKey to position 2
( Y page 103) in the ignition lock.
X Check the coolant temperature display in
the instrument cluster.
The coolant temperature must be below
158 ‡ (70 †). X
Slow ly turn cap :half a turn counter-
clockwise and allow excess pressure to
escape.
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 coolant expansion tank ;.
X If necessary, add coolant that has been tes-
ted 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 264).
Adding washer fluid to the windshield
washer system/headlamp cleaning
system
GWARNING
Certain components in the engine compart-
ment, such as the engine, radiator and parts
of the exhaust system, can become very hot.
Working in the engine compartment poses a
risk of injury.
Where possible, let the engine cool down and
touch only the components described in the
following.
GWARNING
Windshield washer concentrate could ignite if it comes into contact with hot engine compo-
nents or the exhaust system. There is a risk of
fire and injury.
Make sure that no windshield washer con-
centrate is spilled next to the filler neck.
208Engine compartment
Maintenance and care