2017 MERCEDES-BENZ G-Class engine

Engine compartment
Hood
Important safety notes
GWARNING
If th ehood is unlatched, it may open up when
th ev ehicle is in motion and blocky our view.
Thereisar isk of an accident.
Never unlatch th ehood while driving .Before
ever ytrip, ensure that th ehood is locked.
GWARNING
When opening and closingt hehood,itm ay
suddenly fall int othe closed position.T hereis
ar isk of injury to personsw ithin range of
movementoft hehood.
Open and close th ehood only when no onei s
within its range of movement.
GWARNING
Opening th ehood when th eengine is over-
heated or when there is afireint heengine
compartmen tcoul de xpose you to hot gases
or other servic eproducts. Thereisar isk of
injury.
Let an overheate dengine coo ldown before
opening th ehood.Ift here is afireint he
engine compartment, keep th ehood closed
and contac tthe fired epartment.
GWARNING
The ignition system and th efuel injection sys-
te mw ork unde rhigh voltage. If you touch
component swhicha re unde rvoltage, you
coul dget an electric shock. Thereisar isk of
injury.
Never touch component softheignition sys-
te morf uel injection system when th eignition
is switched on.
GWARNING
The engine compartmen tcontain smoving
components. Certain components, sucha s
th er adiator fan ,may continue to run or start
again suddenly when th eignition is off .There
is ar isk of injury.
If you nee dtodoany work inside th eengine
compartment:
Rswitch off th eignition
Rnever reac hintot he area wheret here is a
risk of danger from moving components,
suchast hefan rotatio narea
Rremove jewelry and watches
Rkeep items of clothing and hair, for exam-
ple, away from moving parts
Do no ttou ch th efollowingw hen theignition is
switched on:
RIgnition coils
RSpar kplug connectors
RTest socket
Opening th ehood
GWARNING
Certain component sintheengine compart-
ment, suchast heengine ,radiator and parts
of th eexhaust system, can become ver yhot.
Workin gintheengine compartmen tposesa
risk of injury.
Wherep ossible, let th eengine coo ldown and
touch only th ecomponent sdescribe dinthe
following.
GWARNING
When th ehood is open and th ewindshield
wipersa re set in motion,y ou can be injured by
th ew iper linkage. Thereisar isk of injury.
Always switch off th ewindshield wipersa nd
th ei gnition before opening th ehood.
!Makes ure that th ewindshield wipersa re
no tfolded away from th ewindshield. You
coul dotherwise damag ethe windshield wip-
ers or th ehood.
Engine compartment225
Maintenance and care
Z

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.
XMake sure that the windshield wipers are
turned off.
XPull release lever:on the hood.
The hood is released.
XLift the hood slightly.
XPush the handle of hood catch ;in the direc-
tion of the arrow and lift the hood.
The hood is opened and held open automati-
cally by the gas-filled strut.
Closing the hood
XLower the hood and let it fall from aheight of
approximately 8in(20 cm).
XCheck that the hood has engaged properly.
If the hood can be raised slightly, it is not
properly engaged. Open it again and close it
withalittle more force.
Radiator
Do not cover up the radiator, such as with a
thermal mat or insect protection cover. Other-
wise, the values of the European on-board diag- nostics may be affected. Some of these read-
ings are required by law and must be accurate at
all times.
Engine oil
Important safety notes
GWARNING
Certain components in the engine compart-
ment,s uch as the engine, radiator and parts
of the exhaust system, can become very hot.
Workin ginthe 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 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 ar isk of injury.
If you need to do any work inside the engine
compartment:
Rswitch off the ignition
Rnever reach into the area where there is a
risk of danger from moving components,
such as the fan rotation area
Rremove jewelry and watches
Rkeep items of clothinga nd hair, for exam-
ple, away from moving parts
GWARNING
If engine oil comes into contact with hot com- ponent sinthe engine compartment,itm ay
ignite. There is arisk of fire and injury.
Make sure that engine oil is not spilled next to
the filler neck.L et the engine cool down and
thoroughly clean the engine oil off the com-
ponent sbefore starting the engine.
226Engine compartment
Maintenance and care

GWARNING
Opening the hood when the engine is over-
heated or when there is afire in the engine
compartment coul dexpose you to hot gases
or other service products. There is arisk of
injury.
Let an overheated engine cool downb efore
opening the hood. If there is afire in the
engine compartment, keep the hood closed
and contact the fire department.
Notes on the oil level
Depending on you rdriving style ,the vehicle
consumes up to 0.9 US qt (0.8 liters )ofoil per
600 mile s(1000 km). The oil consumption may
be higher than this whe nthe vehicle is new or if
you frequently drive at high engine speeds.
Depending on the engine, the oil dipstick may be
in ad ifferent location.
When checking the oil level:
Rpark the vehicle on alevels urface
Rthe engine should be switched off for approx-
imately five minutes if the engine is at normal
operating temperature
Rif the engine is not at normal operating tem-
perature, e.g. if the engine wa sonly started
briefly,w aita pproximately 30 minutes before
carrying out the measurement
Checking the oil level usingt he oil dip-
stick
Example: engine compartment
On the G63AMG, the oil levelc an be checked
using the oil dipstick.
XPul loil dipstick :out of the dipstick guide
tube.
XWipeo ff oil dipstick :.
XSlowly slide oil dipstick :into the guide tube
to the stop and take it out again after approx-
imately three seconds.
If the levelisb etween MIN mark =and MAX
mark ;,the oil levelisc orrect.
XIf the oil levelh as dropped to MIN mark =or
below, add 1.1 US qt (1.0 l)of engine oil.
On all other models, the on-board computer
must be used to check the engine oil level.
Checking the oil level using the on-
board computer
G5 50: the oil level can only be checked using
the on-board computer.
XMake sure that the SmartKey is in position 2
in the ignition lock.
XPress 9or: on the steering wheel to
select the following message: Measuring
EngineOilLevelAccurateOnlyWhenVehicle Is Level
The measurement takesafew seconds. You will
see one of the following messages in the multi-
function display:
REngine Oil Level OK
RAdd1.1litersEng.OilatNextRefu‐eling
XAdd oil if necessary.
If the engine is at normal operating temperature and the Reduce Engine Oil Level
display
appears, too much oil has been added.
XHave excess oil siphoned off.
If the For Engine Oil Level Ignition
Must Be Onmessage appears:
XTurn the SmartKey to position 2in the igni-
tion lock (Ypage 104).
If the Need More Time to Check Engine
Oil Levelmessage appears:
XIf the engine is at norma loperating tem-
perature: repeat the measurement after
approximately five minutes.
XIf the engine is not at norma loperating
temperature: e.g. if the engine was only star-
ted briefly, repeat the measurement after
approximately 30 minutes.
Engine compartment227
Maintenance and care
Z

If theEngine Oil Level Not Measurablewith Running Enginemessage appears:
XSwitch off the engine.
XIf the engine is at normal operating tem-
perature: waitabou tfive minutes before car-
rying out the measurement.
XIf the engine is not at normal operating
temperature: e.g. if the engine was only star-
ted briefly, wai tapproximately 30 minutes
before carrying out the measurement.
If you wish to cancel the measurement, press
the 9 or: button on the multifunction
steering wheel.
Adding engine oil
!Use only engine oils and oil filters that are
approved for vehiclesw ithaservice system. A
list of the engine oils and oil filters that have
been tested and approved in accordance with
Mercedes-Benz Specifications for Service
Products is available at any authorized
Mercedes-Benz Center.
The following cause engine failure or damage
to the exhaust system:
RUse of engine oils and oil filters that have
not been expressly approved for the service
system
RReplacement of engine oil and oil filter after
the replacement interval specifiedbyt he
service system has expired
RUse of 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 leadt o
damage to the engine or the catalytic con-
verter. Have excess oil siphoned off.
HEnvironmental note
When adding oil, take care not to spilla ny. If
oil enters the soil or waterways ,itisharmful to
the environment.
Example: engine oil cap
XTurn cap :counter-clockwise and remove it.
XAdd the amount of engine oil required.
Observe the specifications in the on-board com-
puter when doing so or fill carefully to the max-
imum mark on the oil dipstick.
The difference betweent he minimum mark and
the maximum mark on the oil dipstick is approx-
imatel y2.1 US qt (2.0 l).
XReplace cap :on the fille rneck and tighten
clockwise.
Ensur ethat the cap locks into place securely.
Further information on engine oil(
Ypage 278).
Additional servic eproducts
Important safety notes
GWARNING
Certai ncomponents in the engine compart-
ment, such as the engine, radiator and parts
of the exhaus tsystem, can become very hot.
Working in the engine compartment poses a
ris kofi njury.
Where possible ,let the engine cool dow nand
touch only the components described in the
following.
GWARNING
The engine compartment contains moving
components .Certai nc omponents ,suc ha s
the radiator fan, may continu etorun or start
agai nsudde nlyw hent he ignition is off. There
is ar iskofi njury.
228Engine compartment
Maintenancea nd care

If you need to do any work inside the engine
compartment:
Rswitch off the ignition
Rnever reach into the area where there is a
risk of danger from moving components,
such as the fan rotation area
Rremove jewelry and watches
Rkeep items of clothing and hair, for exam-
ple, awayfrom moving parts
GWARNING
The cooling system is pressurized, particularly
when the motor is warm. If you open the cap,
you could be scaldedifh ot coolant spraysout.
There is arisk of injury.
Let the engine cool down before you open the
cap. Wear gloves and eye protection. Slowly
open the cap to relieve pressure.
GWARNING
Opening the hood when the engine is over-
heated or when there is afire in the engine
compartment could expose you to hot gases
or other service products. There is arisk of
injury.
Let an overheated engine cool down before
opening the hood. If there is afire in the
engine compartment, keep the hood closed
and contact the fire department.
Checking coolant level
Checking the coolant level (example)
XPark the vehicle on alevel surface. Only check the coolant level when the vehicle
is on alevel surface and the engine has cooled
down.
XTurn the SmartKey to position 2in the igni-
tion lock (Ypage 104).
XCheck the coolant temperature display in the
instrument cluster.
The coolant temperature must be below
158 ‡(70 †).
XSlowlyt urn cap :half aturn counter-clock-
wise and allow excess pressure to escape.
XTurn cap :further counter-clockwise and
remove it.
If the coolant is at the level of marker bar =
in the fillern eck 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 fillern eck
when warm, there is enough coolant in cool-
ant expansion tank ;.
XIf necessary,add coolant that has been tested
and approved by Mercedes-Benz.
XReplace cap :and turn it clockwise as far as
it willg o.
For further information on coolant, see
(
Ypage 279).
Adding washe rfluid to the windshield
washe rsystem/headlamp cleaning
system
GWARNING
Windshield washer concentrate could ignite if it comes into contact with hot engine compo-
nents or the exhaust system. There is arisk of
fire and injury.
Make sure that no windshield washer con-
centrate is spilled next to the fillern eck.
Engine compartment229
Maintenanceand care
Z

Example: adding liquid to the windshield
washersystem
XTo open: pull cap:upwards by the tab and
open.
XAdd the premixed washe rfluid.
XTo close: press cap :onto the fille rneck
unti lite ngages.
The washe rfluid reservoi risusedf or both the
windshiel dwashers ystem and the headlamp
cleaning system.
If the washe rfluid level drops belo wthe recom-
mended minimu mof3.7 US qt (3.5 l) ,amessage
appear sinthe multifunctio ndisplay prompting
yo utoa ddwashe rfluid (
Ypage 187).
Furtheri nformatio nonwasherf luid
(
Ypage 280).
Brake fluid level
!If yo unotice thatt he brake fluid level in the
brake fluid reservoi rhas fallen to the MIN
mark or less, check the brake system imme-
diately for leaks .Alsoc heck the thicknes sof
the brake linings. Visitaq ualified specialist
workshop immediately.
Do not ad dbrake fluid .Thisd oesn ot correct
the error.
Onlyc heck the brake fluid level when the vehicle
is stationar yand on alevel surface. The brake
fluid level is correct if the level is between MAX
mark :and MIN mark ;on the brake fluid
reservoir.
Maintenance
Service interval display
Service messages
Yo uc an obtai nup-to-date informatio nconcern-
ing the servicing of your vehicl efromaq ualified
specialis tworkshop ,e.g.ana uthorized
Mercedes-Benz Center or at
http://www.mbusa.com (USA only).
The ASSYST servic eintervald isplayinforms you
of the next servic eduedate.
If as ervic eduedate hasb eene xceeded ,you
also hear awarning tone.
The multifunctio ndisplay shows aservic emes-
sage for severa lseconds, e.g.:
ServiceAIn9 99,999km
ServiceAin..D ays
ServiceADue
ServiceAExceeded 999,999k m
ServiceAExceeded .. Days
Maintaining the time-dependent servic esched-
ule:
XBefore disconnecting the battery ,note down
the servic eduedate displayed.
or
XAfter reconnecting the battery ,sub tract the
battery disconnection periods fromt he ser-
vic ed ates hown on the display.
The servic eintervald isplayshouldnot be con-
fused with the 4engine oi llev el display.
The symbo land the letter indicate which typ eof
servic eisdue:
¯ Minor service A
±
Major service B
The ASSYST servic eintervald isplaydoes not
take into account any periods of time during
which the battery is disconnected.
230Maintenance
Maintenance and care

Hidingaservice message
XTo hide the service message, press the %
back button on the multifunction steering
wheel(
Ypage1 58).
Displayings ervice messages
Use the buttons on the multifunction steering
wheel.
XSwitch on the ignition.
XPress=or; to select the standard
display menu on the steering wheel
(
Ypage1 60).
XPress9or: to select the service
interval display.
The ¯ or± service symbol and the ser-
vice due date are displayed.
Points to remember
The specified maintenance interval takes only
the normal operation of the vehiclei nto
account. Under arduous operating conditions or
increased loadont he vehicle, maintenance
work must be carrie dout more frequently, for
example:
Rregular city driving with frequent intermediate
stops
Rif the vehicleisp rimarily usedtotravel short
distances
Ruse in mountainous terrainoronp oor road
surfaces
Rif the engine is often left idling for long periods
Under these or similar conditions, have ,for
example, the air filter, engine oil and oil filter
replaced or changed more frequently. Under
arduous operating conditions, the tires must be
checked more often. Further information can be obtained at aqualified specialist workshop, e.g.
an authorized Mercedes-Benz Center.
Care
General notes
!
For cleaning you rvehicle, do not use any of
the following:
Rdry, roug horhard cloths
Rabrasive cleaning agents
Rsolvents
Rcleaning agents containing solvents
Do not scrub.
Do not touch the surfaces or protective films
with hard objects, e.g. aring or ice scraper.
You coul dotherwise scratch or damage the
surfaces and protective film.
!Do not park you rvehiclef oralong period of
time directly after cleaning, particularly after
cleaning the wheelr im with wheelcleaner.
Wheelc leaner can leadtot he increased cor-
rosionoft he brake discs and pads. Therefore,
drive for afew minutes after cleaning. By
heating up the brakes ,the brake discs and
padsd ry. The vehiclec an then be parked for a
long period of time.
HEnvironmental note
Disposeofe mpty packaging and cleaning
cloths in an environmentally responsiblem an-
ner.
Regula rcare of you rvehicleisac ondition for
retaining the quality in the long term.
Use care products and cleaning agents recom-
mended and approved by Mercedes-Benz.
Washing the vehicle and cleaning the
paintwork
Automatic car wash
GWARNING
Braking efficiency is reduced after washing
the vehicle. There is arisk of an accident.
After the vehicleh as been washed, brake
carefully while paying attention to the traffic
conditions until full braking power is restored.
!When DISTRONIC PLUS or the HOLD func-
tion is activated, the vehicleb rakes automat-
ically in certain situations.
To avoi ddamage to the vehicle, deactivate
DISTRONIC PLUS and the HOLD function in
the following or similar situations:
Rwhen towing the vehicle
Rin the car wash
!Never cleany ourv ehicleinaT ouchless
Automatic Ca rWash as these use special
Care231
Maintenance and care
Z

XTake the screwdriver out of the vehicle tool kit(Ypage 239).
XOpen the lock on cover ring :with screw-
driver =oras imilar tool.
XFold tab ;down.
XPull cover ring :apart and remove it.
XPull off trim panel ?.
XWhen re-installing cover panel ?,make sure
that retainer Aengages into recess B.
Removing the sparew heel
The spare wheel is heavy. Take particular noteo f
this when removing the spare wheel.
XRemove wheel nuts :.
XRemove the spare wheel.
Mounting the wheel
After changingawheel:
XRepair or replace the damaged wheel as soon
as possible and secure the spare wheel in
place again.
XSecure the damaged wheel on the spare
wheel bracket with wheel nuts :.When
doing so, make sure that the wheel cannot
come loose.
XWhen re-installing trim panel ?,make sure
that retainer Bengages in recess A
(
Ypage 239).
XMake sure that tab ;is below when re-
installing cover ring :(Ypage 239).
XFor safety reasons, regularly check to ensure
that the wheel is securely fastened.
Flat tire
Preparing the vehicle
XStop the vehicle on solid, non-slippery and
level ground, as far away as possible from
traffic.
XSwitch on the hazard warning lamps.
XSecure the vehicle against rolling away
(Ypage 120).
XIf possible, bring the front wheels into the
straight-ahead position.
XSwitch off the engine.
XRemove the SmartKey from the ignition lock.
The steerin gwheel lock stays active for as
long as the SmartKey is removed.
XMake sure that the passengers are not endan-
gered as they do so. Make sure that no one is
near the danger area while awheel is being
changed. Anyon ewho is not directly assisting
in the wheel change should, for example,
stand behind the barrier.
XGet out of the vehicle. Pay attention to traffic
conditions when doing so.
240Flat tire
Breakdown assistance