MERCEDES-BENZ G-CLASS SUV 2018 Owners Manual

Problem
Possible causes/consequences and M
MSolutions #
Have the transmission checked at a qualified specialist workshop immediatel y.
The acceleration characteristics are
de teriorating.
The transmission no longer shifts gear. The transmission is in emer
gency operation mode.
It is only possible toshift toone gear and reve rsege ar. #
Pull over and stop theve hicle, paying attention toroad and traf fic conditions. #
Switch the transmission toposition j. #
Switch off the engine. #
Wait at least ten seconds be fore re starting the engine. #
shift the transmission toposition hork.
If h is selected, the transmission only shifts toone gear; if kis selec ted, the transmission shifts to
re ve rsege ar. #
Have the transmission checked at a qualified specialist workshop immediatel y.15 8
Driving and pa rking

Tr
ansfer case Fu
nction of the transfer case &
WARNING Risk of skidding and having
an accident when in LOW RANGE on slip‐
pery road sur faces
If yo u select theLO W RANGE off-road gear
on a slippe ryroad sur face, the wheels could
lose traction in thefo llowing situations:
R ifyo ure lease the accelerator pedal when
th eve hicle is in motion.
R if off-road ABS inter venes when braking.
If th e wheels lose traction, it will no longer be
possible tosteer theve hicle. #
Never select theLO W RANGE off-road
ge ar when driving on slippe ryroad sur‐
fa ces. Shift
the transfer case tothe on-ro ad position
HIGH RANGE or intotheLO W RANGE off-road
ge ar. Shift
ranges
HIGH RANGE LOW RANGE
Ro ad position for all
normal on-road driv‐
ing situations. Off-road
gear for driv‐
ing off-road, when
fo rd ing and on steep
uphill or downhill
inclines. Properties of
theLO W RANGE off-road gear:
R reduced maximum speed and increased trac‐
tive po wer
R the transmission ratio changes byappr ox‐
imately a factor of thre e.
R increased drive torque
Do not use LOW RANGE in thefo llowing situa‐
tions:
R when driving on public roads. Shifting
the transfer case Shifting
totheLOW RANGE off-road gear Re
quirements:
R you are not driving on a pa ved or public road.
R the engine is running and you are not driving
fast erthan 40 km/h.
R the transmission is in position i. Driving and parking
15 9

#
Press LOW RANGE 1button.
Indicator lamp 2flashes. The shift request
st ay s active for a maximum 30 seconds. If all
re qu irements for shift operation are not fulfil‐
led within this time, the indicator lamp 2
switches off again and the shift operation
must be star ted again. #
Switch the transmission toposition i.
If shift operation is successful, the message
LOW RANGE on appears inthe instrument
clus ter,an audible signal sounds and the
indicator lamp 2lights up continuousl y.The
ve hicle changes automatically totheG-Mode
drive prog ram. #
Shift the transmission toposition h.
% The vehicle stay s in LOW RANGE if you park
th eve hicle in LOW RANGE, even af terthe
engine has been restar ted. The G-Mode drive
program continues tobe active
(/ page 152). In
the on-road position, shift toHIGH RANGE
Re quirements:
R the engine is running and you are not driving
fast erthan 70 km/h.
R
R the transmission is in position i. #
Press LOW RANGE 1button.
The shift requeststay s active for a maximum
30 seconds. If all requ irements for shift oper‐
ation ha venot been ful filled within this time,
shift operation must be star ted again. #
Shift the transmission toposition i.
If shift operation is successful, the message
LOW RANGE off appears inthe instrument
clus ter,an audible signal sounds and the
indicator lamp 2goes out. #
Shift the transmission toposition h. Dif
fere ntial loc ks Fu
nction of the dif fere ntial lock &
WARNING Risk of accident when di ffer‐
ential lock is disengaged on a firm sur‐
fa ce
If yo u en gage differe ntial lo cks when driving
on a firm , high-t raction su rface, thesteerabil‐
ity of theve hicle is se verely restricted. Yo u
could lose control of theve hicle, especially
when engaging on a bend. #
Alw ays disengage the dif fere ntial lo cks
immediately on a firm , high-t raction
su rface. &
WARNING Risk of accident due todeac‐
tivated driving saf ety sy stems
When the dif fere ntial lo cks are engaged,
ABS, 4ETS, ESP ®
and BAS are deactivated.
Because of this, the wheels can lock while
braking and the braking dis tance is
increased. 16 0
Driving and pa rking

#
Alw ays disengage the dif fere ntial lo cks
immediately on a firm , high-t raction
su rface. Dif
fere ntial lo cks impr ovethe traction of the
ve hicle when driving off-road and ford ing. The
vehicle has thre e dif fere ntial lo cks:
R the dif fere ntial lo ckforth e transfer case 1
disables thero tational speed compensation
between the front and rear axles.
R the dif fere ntial lo ckforth ere ar axle 2disa‐
bles thero tational speed compensation
between the wheels of there ar axle.
R the dif fere ntial lo ckforth e front axle 3dis‐
ables thero tational speed compensation
between the wheels of the front axle.
Sy stem limits
If th e dif fere ntial lo cks are engaged, thefo llow‐
ing driving and driving saf ety sy stems are deacti‐
va ted:
R ABS( /page 178)
R Active Dis tance Assi stDISTRONIC
(/ page 190)
R Active Brake Assi st
R Active Parking Assist(/ page 207)
R Active Lane Keeping Assist(/ page219)
R BAS(/ page179)
R Hill Start Assist(/ page194) R
ECO start/ stop function (/ page148)
R ESP ®
(/ page 179)
R HOLD fu nction (/ page 195)
R limi ter (/ page187)
R cruise control (/ page 186)
R Blind Spot Assi st(/ page 217) Swi
tching dif fere ntial lock off/on Applies dif
fere ntial lock
Re quirements:
R You are not driving on a pa ved or public road.
R you are driving at walking pace.
R the driven wheels are not spinning. #
You can en gage the dif fere ntial lo cks in the
fo llowing order: 1,2, 3. Then press the
re spective buttons. Only engage the dif fere n‐
tial lo ck2 and 3forth e front and rear
axle if requ ired.
If all conditions ha vebeen fulfilled, the activation
indicator lamps 5light up. As soon as the dif‐ Driving and parking
161

fe
re ntial lo cks are active, the function indicator
lamps 4light up.
The message Differential lock active ABS and
ESP not available andthewa rning and indicator
lamps å÷!on the instrument clus‐
te r appear.
% If one or more requ irements ha venot been
ful filled, the message Switch-on conditions
Differential lock not fulfilled appears.
The gear change must be restar ted.
Disengaging the dif fere ntial loc ks #
Press the buttons in thefo llowing order 3,
2, 1.
or #
Tosimultaneously disengage all dif fere ntial
lo ck s: press button 1.
or #
Todisengage the dif fere ntial lo cksfo rthe
re ar and front axles: press button 2.
The dif fere ntial lo cks are only disengaged when
th e function indicator lamps are gone out again
4. If
yo u park theve hicle with the dif fere ntial lo cks
engaged, they will be deactivated automatically
when theve hicle is star ted again. In some cases,
yo u ha vetodrive a few metres before the dif fer‐
ential loc ksare proper ly disengaged. Therefore,
ch eck if the function indicator lamps ha vegone
out when youre start theve hicle 4.
Obser veany information which may be displa yed
in the instrument clus ter:
R Warning and indicator lamps
R Display messages Fu
nction of the 4MATIC
4MATIC ensures that all four wheels are driven
when needed. Toge ther with ESP ®
and 4ETS,
4MATIC impr ovesth e traction of your vehicle
whene ver a driven wheel spins due toinsuf fi‐
cient traction.
If yo ufa ilto adapt your driving style, 4MATIC can
neither reduce therisk of an accident nor over‐
ri de the la wsof ph ysics. 4MATIC cannot take
account of road, weather and traf fic conditions.
4MATIC is only an aid. You are responsible espe‐ cially
for maintaining a safe dis tance from the
ve hicle in front, forve hicle speed, for braking in
good time and forst ay ing in lane.
% In wint ryroad conditions, the maximum
ef fect of 4MATIC can be achie ved only if you
use winter tyres (M+S tyres), with sn ow
ch ains if necessar y. Re
fuelling Re
fuelling theve hicle &
WARNING Risk offire or explosion from
fuel
Fu els are highly flammable. #
Fire, naked flames, smoking and crea‐
tion of spar ksmust be avoided. #
Swit choff the ignition and, if available,
th est ationary heater, before and while
re fuelling theve hicle. 16 2
Driving and pa rking

&
WARNING Risk of inju ryfrom fuels
Fu els are poisonous and hazardous to your
health. #
Do not swallow fuel or let it come into
contact with skin, eyes or clo thing. #
Do not inhale fuel vapour. #
Keep children away from fuel. #
Keep doors and windo wsclosed du ring
th ere fuelling process.
If yo u or other people come into contact with
fuel, obser vethefo llowing: #
Immediately rinse fuel off your skin with
soap and water. #
If fuel comes into contact with your
ey es, immediately rinse them thor‐
oughly with clean water.Seek medical
attention immediately. #
Ifyo u swallow fuel, seek medical atten‐
tion immediatel y.Do not induce vomit‐
ing. #
Change immediately out of clo thing that
has come into con tact wi thfuel. &
WARNING Risk offire or explosion from
elect rostatic charge
Electros tatic charge can crea tespar ksand
th ereby ignite fuel vapours. #
Before you open the fuel filler cap or
ta ke hold of the pump nozzle, touch the
me tallic vehicle body.
This dischar ges any electros tatic charge
th at may ha vebuilt up. #
Do not get into theve hicle again during
th ere fuelling process.
Otherwise, electros tatic charge could
build up again. &
WARNING Risk offire from fuel mixture
Ve hicles with a diesel engine:
If yo u mix diesel fuel with petrol, theflash
point of the fuel mixture is lo werth an that of
pure diesel fuel. While
the engine is running, component
pa rts in theex haust sy stem may overheat
without warning. #
Neverre fuel using petrol. #
Never mix petrol with diesel fuel. *
NO
TEDama gecaused bythe wrong fuel Ve
hicles with a petrol engine:
Even small amounts of the wrong fuel could
re sult in damage tothe fuel sy stem, the
engine and the emission control sy stem. #
Only refuel using unleaded, sulphu r-free
fuel that con form sto European EN 228,
or an equi valent specification. #
The RONrequ irement is located in the
fuel filler flap.
Fu el of this specification may con tain up to
10 %ethanol. Your vehicle is suitable for use
with E10 fuel. Driving and parking
16 3

Ne
verre fuel using any of thefo llowing fuels:
R diesel
R regular petrol with an octane number
lo we rth an 91 RON
R petrol with more than 10%ethanol byvol‐
ume, e.g. E15, E30, E85, E100
R petrol with more than 3% me thanol by
vo lume, e.g. M15, M30
R petrol with additives con taining me tal
If yo u acciden tally refuel with the wrong fuel: #
Do not switch the ignition on. #
Consult a qualified specialist workshop. *
NO
TEDama gecaused bythe wrong fuel Ve
hicles with a diesel engine:
Even small amounts of the wrong fuel could
re sult in damage tothe fuel sy stem, the
engine and the emission control sy stem. #
Only refuel using sulphu r-free diesel
fuel that con form sto European stand‐ ard EN 590, or an equivalent specifica‐
tion.
In countries without sulphur-f ree diesel
fuel, refuel using only lo w-sulphur diesel
fuel with a sulphur content less than
50 ppm. #
Vehicles without diesel particulate
fi lter: refuel using only diesel fuel with
a sulphur content less than 500 ppm.
Ne verre fuel using any of thefo llowing fuels:
R petrol
R marine diesel
R heating oil
R pure bio-diesel fuel or vege table oil
R paraf fin or kerosene
If yo u accidentally refuel with the wrong fuel: #
Do not switch the ignition on. #
Consult a qualified specialist workshop. *
NO
TEDo not use diesel torefuel vehi‐
cles with a petrol engine. If
yo u acciden tally refuel with the wrong fuel:
R Do not switch the ignition on. Otherwise
fuel can enter the engine.
Even small amounts of the wrong fuel
could result in damage tothe fuel sy stem
and the engine. The repair costs are high. #
Consult a qualified specialist workshop. #
Have the fuel tank and fuel lines
drained compl etely. *
NO
TEDo not use petrol torefuel vehi‐
cles with a diesel engine. If
yo u acciden tally refuel with the wrong fuel:
R Do not switch the ignition on. Otherwise,
fuel can enter the fuel sy stem.
Even small amounts of the wrong fuel
could result in damage tothe fuel sy stem
and the engine. The repair costs are high. 16 4
Driving and pa rking

#
Consult a qualified specialist workshop. #
Have the fuel tank and fuel lines
drained compl etely. *
NO
TEFuel may spr ayout when you
re mo vethe fuel pump nozzle. #
Only fill th e fuel tank until the pump
nozzle switches off. Re
quirements:
R The vehicle is unloc ked.
% Do not get into theve hicle again during the
re fuelling process. Otherwise, electros tatic
ch arge could build up again.
Obser vethe no tes on operating fluids
(/ page 429). 1
Fuelfiller flap
2 Fuelfiller cap
3 Fuel type
4 Tyre pressure table
5 QR code forre scue card #
Press on the back area of fuel filler flap 1. #
Turn the fuel filler cap anti-clockwise and
re mo veit. #
Comple tely inse rtthe pump nozzle into the
ta nk filler nec k,hook in place and refuel. #
Only fill th e fuel tank until the pump nozzle
switches off.
% Vehicles with a diesel engine: theta nk
fi ller neck is designed forre fuelling at diesel
fi lling pumps.
% Vehicles with a diesel engine: whenthe
fuel tank is compl etely em pty, top up with at
least 5 litres of diesel.
% Vehicles with a diesel engine: use afiller
neck with a lar gediame terfo rve hicles with
a diesel engine when topping up fuel from a
fuel can. Otherwise, thefiller neck cannot
slide into theta nk. #
Replace the cap on thefiller neck and turn
clockwise until it engages audibl y. #
Close the fuel filler flap. Driving and parking
16 5

Ad
Blue ®
(vehicles with a diesel engine on ly)Note
s onrefilling AdBlue ®
* NOTEWhen you open theAd Blue ®
tank,
small amounts of ammonia vapour may
escape. #
Only fill th eAd Blue ®
tank in well-venti‐
lated areas. #
Do not let AdBlue ®
come into contact
wi th skin, eyes or clo thes. #
Keep AdBlue ®
aw ay from children. *
NOTEDo not ingest AdBlue ®
. If
Ad Blue ®
is swallo wed: #
Immediately rinse out your mouth thor‐
oughl y. #
Drink plenty of water. #
Seek medical attention immediately. Obser
vethe no tes on operating fluids
(/ page 429). Ad
Blue ®
is a water-soluble fluid forth e NOx
ex haust gas af tertre atment of diesel engines. In
order forth eex haust gas af tertre atment tofunc‐
tion properly, only use AdBlue ®
in accordance
wi th ISO 222 41 .
Ad Blue ®
is ch aracterised bythefo llowing:
R non-t oxic
R colourless and odourless
R non-flammable
Ad Blue ®
is available here:
R AdBlue ®
may be topped up byfast service at
a qu alified specialist workshop, e.g. a
Mercedes-Benz Service Centre.
R AdBlue ®
is available at many filling stations
from AdBlue ®
filling pumps.
R Alternativel y,Ad Blue ®
is available at qualified
specialist workshops, e.g. Mercedes-Benz
Service Centres, and at many filling stations
in Ad Blue ®
re fill canis ters or AdBlue ®
re fill
bottles. %
Ensure the connection between there fill
con tainer and vehicle filler neck does not
drip.
To pping up AdBlue ®
* NOTEEngine dama gedue toAd Blue ®
being in the fuel #
AdBlue ®
must not be used tofill the
fuel tank. #
Only use AdBlue ®
to fill th eAd Blue ®
ta nk. #
Do not overfill theAd Blue ®
tank. *
NO
TEContamination of theve hicle inte‐
ri or due toAd Blue ®
lea kage #
Afterto pping up, carefully close the
Ad Blue ®
re fill con tainer. #
Avoid car rying AdBlue ®
re fill con tainers
permanently in theve hicle. Re
quirements:
R The vehicle is unloc ked. 16 6
Driving and pa rking

The
following messages appear in order in the
multifunction display when theAd Blue ®
tank
re qu ires refilling:
R Refill AdBlue See Owner’s Manual .Yo u can
on lydrive theve hicle overth e dis tance
shown.
R Top up AdBlue Perf. reduced in XXX miles
See Owner's Manual. You can on ly drivethe
ve hicle overth e dis tance shown. The
Ad Blue ®
tank is down tothere ser veleve l.
R Top up AdBlue Perf. reduced: XXX km/h No
start in XXX km. You can on lydrive theve hi‐
cle overth e dis tance shown. Refill Ad Blue ®
as soon as possible.
R Refill AdBlue Eng. start not possible. The
vehicle can no longer be star ted.
Yo u can see theAd Blue ®
ra nge and le vel in the
multifunction display (/ page 230).
% The AdBlue ®
ra nge shown depends strongly
on the driving style and operating condi‐
tions. The actual range can therefore deviate
from the calculated range. Opening the
AdBlue ®
filler cap #
Press on the back area of fuel filler flap 1. #
Turn AdBlue ®
filler cap 2anti-clockwise and
re mo veit.
% You can also store theAd Blue ®
filler cap in
th e fuel filler cap holder in the fuel filler flap
hin gearm. Prepa
ring theAd Blue ®
re fill canis ter #
Screw onthefast ener of AdBlue ®
re fill canis‐
te r2. #
Screw disposable hose 1onto the opening
of Ad Blue ®
re fill canis ter2 until hand-tight. Driving and parking
167