check engine light MERCEDES-BENZ G-CLASS SUV 2016 User Guide

When driving on an incline, drive into the line
of fall (upwards or downwards in astraight
line) and do not turn.
Always observe the approach/departure angle
values (Y page 255).
R Observe the safety notes (Y page 119) and
general notes (Y page 119) on driving off-
road.
R Follow the line of fall when driving on slopes
and steep inclines.
R Befor edriving on extreme uphill and extreme
downhill gradients ,set the transfer case to
the LOW RANGE off-road driving position
(Y page 124).
R Engage the differential locks if necessary
(Y page 126).
R Drive slowly.
R Accelerate gently and make sure that the
wheels are gripping.
R Avoid high engine speeds, except when driv-
ing on sandy and muddy routes with high driv-
ing resistance.
R Use the braking power of the engine when
driving down aslope. Observe the engine
speed; do not overrev the engine.
R Shift the automatic transmission to alow gear
appropriate for tackling an uphill gradient or a long, steep downhill gradient.
The HOLD function assists you when pulling
away and manoeuvrin gonaslope or hillside
(Y page 122).
Maximum gradient-climbing capability Alwayso
bserve the maximu mgradient climbing
ability values (Y page 255).
Hilltops When drivin
gupanu phill gradient, slightly
reduce pressure on the accelerator immediately
before reaching the brow of the hill. Make use of the vehicle's own impetus to travel over the
brow.
This style of driving prevents:
R the vehicle from lifting off the ground on the
brow of ahill
R loss of traction
R the vehicle from travelling too quickly down
the other side Driving downhill R
Drive slowly.
R Do no tdrive at an angle down stee pinclines.
Stee rinto the line of fall and drive with the
front wheels aligned straight forwards .Oth-
erwise, the vehicl ecould slip sideways ,tip
and overturn.
R Before tackling stee pdownhil lgradients ,shift
the automatic transmission to alow gear.
By doing so, yo uwillu se the braking effect of
the engine to reduce the speed. If thi sisnot
sufficient, brake gently .Whend oing so, make
sure tha tthe vehicl eisfacing in the direction
of the line of fall.
R Observe the note sondrivinginm ountainous
terrai n(Ypage 122).
R Check tha tthe servic ebrake is workin gnor-
mall yafter alon gd ownhil lstretch.
When drivin gatspeeds below60km/h ,off-road
ABS is activated and the front wheels lock cycli- cally durin gbraking .The digging-i neffect ach-
ieved in the proces sreduce sthe stopping dis-
tance durin goff-roa ddriving. Thi slim its steering
capability. Driving systems
HOLD function
General notes Th
eH OLD function can assist the driver in the
following situations:
R when pulling away,e specially on steep slopes
R when manoeuvring on steep slopes
R when waiting in traffic
The vehicle is kept stationary without the driver having to depress the brake pedal.
The braking effect is cancelled and the HOLD
function deactivated when you depress the
accelerator pedal to pull away.
Do not use the HOLD function when driving off-
road, on steep uphill or downhill gradients or on
slippery or loose surfaces. The HOLD function
cannot hold the vehicle on such surfaces. 122
Driving systemsDriving and parking

also applies in countries in whic
hthe maximum
permissible spee dfor car/trailer combinations
is greate rtha n1 00 km/h.
When towing atrailer, your vehicle's handling
characteristics will be differen ttowhen driving
without atrailer and th evehicle will consume
mor efuel.
Driving tips R
Maintain agreater distance to the vehicle in
front than when driving without atrailer.
R Avoid braking abruptly. If possible, brake gen-
tly at first to allow the trailer to run on. Then,
increase the braking force rapidly.
R The values given for gradient-climbing capa-
bilities from astandstill refer to sea level.
When driving in mountainous areas, note that
the power output of the engine, and conse-
quently the vehicle's gradient-climbing capa-
bility from astandstill, decrease with increas-
ing altitude.
If the trailer swings from side to side:
X Do not accelerate under any circumstances.
X Do not countersteer.
X Brake, if necessary. Coupling up
atrailer
! Do no
tconnect th etrailer brak esystem (if
th et railer is fitte dwitho ne)d irectly to the
towing vehicle's hydraulic brak esystem,
since this is equipped wit hananti-lock brak-
ing system. Otherwise, neither th ebrakes on
th et ow ing vehicle no rthe brakes on the
trailer will work.
Observ ethe maximum permissible trailer
dimension s(widt hand length).
X Apply th evehicle's parking brake.
X Mak esure that th eautomatic transmission is
in transmission position P.
X Positio nthe trailer on aleve lsurface behind
th ev ehicle.
X Couple up th etrailer.
X Establish th eelectrical connection between
th ev ehicle and th etrailer.
X Chec kthatthe trailer lighting system is work-
ing.
X Push th ecombinatio nswitch upward sand
downwards and check whether th ecorre- sponding tur
nsignal indicator on the trailer is
flashing.
Ac onnected trailer is only detected when the
electrical connection is established correctly
and when the lighting system is working prop-
erly. The function of other systems, such as
ESP ®
also depends on this. Uncoupling
atrailer G
WARNING
If you uncouple atrailer with an engaged over-
run brake, you coul dtrap yourh and between
the vehicl eand the trailer drawbar. This poses
ar isk of injury.
Do not uncouple atrailer with an engaged
overru nbrake.
! Do not disconnect
atrailer with an engaged
overru nbrake. Otherwise, yourv ehiclecould
be damaged by the rebounding of the overrun brake.
X Apply the parking brake.
X Make sure that the automatic transmission is
in transmission position P.
X Secure the vehicl eand trailer against rolling
away.
X Close all doors, including the rear door.
X Remove the trailer cable.
X Uncoupl ethe trailer. Traile
rpower supply
! Yo
uc an connect accessories with amaxi-
mu mp ower consumption of 180 Wtothe
permanent powe rsupply.
Yo um ustn ot charge atrailer battery using the
powe rsupply.
The trailer socket of your vehicl eisequippe dat
the factory with apermanent powe rsupply.
The permanent powe rsuppl yiss upplie dvia
trailer socket pi n9.
Yo uc an find mor einformatio nabout installing
the trailer electrics at aquali fied specialis twork-
shop. Towin
gatrailer
129Driving an dparking Z

Important safety notes
G
WARNING
Operating th eintegrated information systems
and communications equipment in the vehicle
while driving willd istract you from traffic con-
ditions. You coul dthen lose control of the
vehicle. There is arisk of an accident.
Only operate these devices if road traffic con-
ditions permit. If you are unsure about the
surrounding conditions, pullo ver toasafe
location and make entries only while the vehi-
cle is stationary.
You must observe the lega lrequirements for the
country in which you are currently driving when operating the on-board computer. G
WARNING
If the instrument cluster has failed or mal-
functioned, you may not recognise function
restrictions relevant to safety .The operating
safety of yourv ehiclemay be impaired .There
is ar isk of an accident.
Drive on carefully.H ave the vehiclechecked
at aq ualified specialist worksho pimmedi-
ately.
If the operating safety of yourv ehicleis
impaired ,park the vehicl esafel yass oon as pos-
sible. Contact aqualified specialist workshop.
! If
ab lackout lighting setting has been selec-
ted, the instrument cluster lighting is
switched off.
The instrument cluster and the display do not show any information.
The on-board computer show sonly display mes-
sage sorw arnings from certain systems on the
multifunction display.Y ou should therefore
make sure yourv ehicleiso perating safel yatall
times.
For an overview, see the instrument cluster illus-
tration (Y page26). Displays and operation
Instrument cluste
rlighting
The brightness control knob is locate donthe
botto mleftoft heinstrumen tcluster
(Y page 26).
X Turn th ebrightness control knob clockwise or
anti-clockwise.
i The ligh
tsensor on th einstrumen tcluster
automatically control sthe brightness of the
multifunction display.
In daylight, th edisplays in th einstrument
cluste rare no tlit. Re
vc ounter
! Do not drive in the overrevving range. Doing
so will damag ethe engine.
The red band in the rev counter indicates the
engine's overrevving range.
The fue lsuppl yisi nterrupted to protect the
engine when the red band is reached. Outside temperature display
You should pay specia lattention to road condi-
tion swhen temperatures are around freezing
point.
Bear in mind that the outside temperature dis-
play indicates the measured air temperature
and not the road surface temperature.
The outside temperature display is in the multi-
function display (Y page 133).
Changes in the outside temperature are dis-
played after ashort delay. Coolant temperatur
edisplay G
WARNING
If yo uopen the bonnet while the engine is
overheating or while there is afire in the
engine compartment, you coul dcome into
contact with hot gase sorother leaking ser-
vice products. There is adange rofinjury.
Allow an overheating engine to cool down
before opening the bonnet. If there is afire in Displays and operation
131On-boardcomputer and displays
Z

X
Press the 6ora button to start dial-
ling.
or X To exit the redial memory: press the%
button. Assistance menu
Introduction In the
Assist.
Assist. menu, you have the following
options:
R Showin gthe assistance graphic
(Y page 137)
Showing the assistanc egraphic X
Press the =or; button on the steering
wheel to select the Assist.
Assist. menu.
X Press 9or: to select Assistance
Assistance
graphic
graphic.
X Press a.
The displa yisinoperative. Service menu
In the Serv.
Serv. menu, you have the following
options:
R Calling up display messages (Y page 141)
R Checking the tyre pressure electronically
(Y page 240)
R Calling up the service due date
(Y page 216)
R Checking the engine oil level (Y page 213)Settings menu
Introduction In the
Settings
Settings menu, you have the following
options:
R Changing the instrument cluster settings
(Y page 137)
R Changing the time/date settings
(Y page 138)
R Changing the light settings (Y page 138)
R Changing the vehicle settings (Y page 139)
R Changing the auxiliary heating settings
(Y page 139) R
Changing the convenience settings
(Y pag e140)
R Restorin gthe factory settings (Y page 141)
Instrumen tcluster Selecting the uni
tofmeasurement for dis-
tance
The Display unit Speed-/odometer: Display unit Speed-/odometer: func-
tion allowsy ou to choose whether certain dis-
playsa ppear in kilometres or miles in the mul-
tifunction display.
You can determine whether the multifunction
display shows certain messages in miles or kil-
ometres.
X Press the =or; button on the steering
wheel to select the Settings Settingsmenu.
X Press the :or9 button to select the
Instrument cluster
Instrument cluster submenu.
X Press ato confirm.
X Press the :or9 button to select the
Display unit Speed-/odometer
Display unit Speed-/odometer function.
You will see the selected setting: km
kmorMiles
Miles.
X Press ato save the setting.
The selected unit of measurement for distance
applies to the following:
R digital speedometer in the Trip Tripmenu
R the total distance recorder and the trip meter
R trip computer
R current consumption and the range
R the navigation instruction sintheNavi
Navi menu
R ASSYST service interval display
Selecting permanent display You can determine whether the multifunction
displayp ermanently shows your speed or the
outside temperature.
X Press the =or; button on the steering
wheel to select the Settings
Settingsmenu.
X Press the :or9 button to select the
Instrument cluster
Instrument cluster submenu.
X Press ato confirm.
X Press the :or9 button to select the
Permanent display:
Permanent display: function.
You will see the selected setting: outside
outside
temperature
temperature orDig. speedo [mph]
Dig. speedo [mph].
X Press ato save the setting.
i The speed is displayed in mph. Menus and submenus
137On-boardcomputer and displays Z

Engine
Warning/
indicator
lamp
N N
Signal type
Possible causes/consequences and M
MSolutions ;
N
The yellow engine diagnostics warning lamp lights up whil ethe engine is run-
ning.
There may be afault with the following, for example:
R engine management
R fuel injection system
R exhaust system
R fuel system
The emission limit values may be exceeded and the engine may be runnin gin
emergenc ymode.
X Consult aqualified specialist workshop immediately.
Vehicles with adiesel engine: the fuel tank has been run dry (Y page 110).
X Start the engine three to four times after refuelling.
If the yellow engine diagnostics warning lamp goes out, emergenc ymode is
cancelled. The vehicle does not have to be checked. 8
N
The yellow reserve fuel warning lamp lights up while the engine is running.
The fuel level has dropped into the reserve range.
Operation of the auxiliary heating is deactivated if the fuel level drops into the
reserve range.
X Refuel at the nearest filling station. %
N
On diesel engine vehicles, the preglow indicator lamp does not light up when the
key is in position 2(Y page 96).
The preglow system is malfunctioning.
X Consult aqualified specialist workshop immediately. ?
N
The red coolant warning lamp lights up while the engine is running and the
coolant temperature display is at the start of the scale.
The temperature sensor for the coolant temperature gauge is malfunctioning.
The coolant temperature is no longer being monitored. The engine could be dam-
aged if the coolant temperature is too high.
X Stop the vehicle immediately,p aying attention to road and traffic conditions,
and switch off the engine. Do not continue driving.
X Secure the vehicle against rolling away (Y page 113).
X Consult aqualified specialist workshop. 162
Warning and indicator lamps on the instrument clusterOn-board computer and displays

Warning/
indicator
lamp
N N
Signa ltype
Possible causes/consequences and M
MSolutions ?
N
The red coolant warning lamp lights up while the engine is running.
The coolant level is too low.
If the coolant level is correct, the airflow to the engine radiator may be blocked or the electric engine radiator fan may be malfunctioning.
The coolant is too hot and the engine is not being cooled sufficiently.
X Observe the additional display messages on the multifunction display.
X Stop the vehicle immediately, paying attention to road and traffic conditions,
and switch off the engine.
X Secure the vehicle against rolling away (Y page 113).
X Leave the vehicle and keep asafe distance from the vehicle until the engine has
cooled down.
X Check the coolant level and top up the coolant, making sure to observe the
warning notes (Y page 215).
X If you have to top up the coolant frequently, have the engine cooling system
checked.
X Make sure that the air supply to the engine radiator is not blocked, e.g. by frozen
slush.
X Do not start the engine again until the coolant temperature is below 120 †. The
engine may otherwise be damaged.
X Drive to the nearest qualified specialist workshop.
X Avoid heavy loads on the engine as you do so, e.g. driving in mountainous terrain
and stop-start traffic. ?
N
The red coolant warning lamp lights up while the engine is running.
The coolant temperature has exceeded 120 †. The airflow to the engine radiator may be blocked or the coolant level may be too low.
G WARNING
The engine is not being cooled sufficiently and may be damaged.
Never drive with an overheated engine. Drivin gwhen your engine has overheated
can cause any fluids that may have leaked into the engine compartment to catch fire.
In addition, steam from an overheated engine can cause serious burns, which can
occur just by opening the bonnet.
There is arisk of injury.
X Observe the additional display messages on the multifunction display.
X Stop the vehicle immediately, paying attention to road and traffic conditions,
and switch off the engine.
X Secure the vehicle against rolling away (Y page 113).
X Leave the vehicle and keep asafe distance from the vehicle until the engine has
cooled down.
X Check the coolant level and top up the coolant, making sure to observe the
warning notes (Y page 215).
X If you have to top up the coolant frequently, have the engine cooling system
checked. Warning and indicato
rlamps on the instrument cluster
163On-boardcomputer and displays Z

The bonnet release lever is in the footwell on the
left-hand side of the vehicle when viewed in the
direction of travel.
X Make sure that the windscreen wipers are
switched off.
X Pull bonnet release lever :.
The bonnet is released. X
Lift the bonnet slightly.
X Push bonnet catch ;in the direction of the
arrow and lift the bonnet.
The bonnet is opened and held open auto-
matically by the gas-filled strut.
Closing the bonnet X
Lower the bonnet and let it fall from aheight
of approximately 20 cm.
X Check that the bonnet has engaged properly.
If the bonnet can be raiseds lightly, it is not
properl yengaged .Open it again and close it
with alittle more force. Radiator
Do not cover up the radiator. Do not use thermal mats, insect protection covers or anything sim-
ilar. Otherwise, the valuesoft he Europeanon-
board diagnostics may be affected .Some of
thes evalue sare required by la wand must
always be correct. Engine oil
Importan tsafety notes G
WARNING
Certain components in th eengine compart-
ment coul dbevery hot, e.g. the engine, the radiator and parts of the exhaust system.
There is
arisk of injury when accessing the
engine compartment.
As far as possible, allow the engine to cool
down and only touch the components descri- bed in the following. G
WARNING
There are moving components in the engine
compartment. Certain components may con-
tinue to move or suddenly move again even
after the ignitio nhas been switched off, e.g.
the radiator fan. There is arisk of injury.
If you have to carry out work in the engine
compartment:
R switch off the ignition
R never touch the dangerous area ssurround-
ing moving components, e.g. the rotation
area of the fan
R remove jewellery and watches
R keep items of clothing and hair, for exam-
ple,a wayfrom moving parts. G
WARNING
If engine oil comes into contact with hot com- ponents in the engine compartment, it may
ignite. There is arisk of fire and injury.
Make sure that engine oil does not spil lout
over the filler neck. Allow the engine to cool
downa nd thoroughly clea nthe components
that have come into contact with engine oil
before you start the engine. G
WARNING
If you open the bonnet while the engine is
overheating or while there is afire in the
engine compartment, you coul dcome into
contact with hot gase sorother leaking ser-
vice products. There is adange rofinjury.
Allow an overheating engine to cool down
before opening the bonnet. If there is afire in
the engine compartment, leave the bonnet
closed and notify the fire brigade. 212
Engine compartmentMaintenanc
eand care

Removin
gthe spare wheel The spare wheel is heavy. Observ
ethis when
removing the spare wheel.
X Remove wheel nuts :.
X Remove the spare wheel.
Fitting the wheel After changing
awheel:
X Secure the damaged whee lonthe spare
whee lbracket with whee lnuts :.W hen
doing so, make sure tha tthe whee lcannot
come loose.
X Cover the whee lwitht he tyr eprotection
cover.
X For safety reasons ,regularly check to ensure
tha tthe whee lissecurel yfastened. Flat tyre
Preparing the vehicle
X Sto pthe vehicle as far away as possible from
traffic on solid, non-slippery and level ground.
X Switch on the hazard warning lamps.
X Secure the vehicle against rolling away
(Y page 113).
X If possible, bring the front wheels into the
straight-ahead position.
X Switch off the engine.
X Remove the key from the ignition lock.
The steering wheel lock is active as soon as
the key is removed.
X Make sure that the passengers are not endan-
gered as they get out of the vehicle. Make
sure that no one is near the danger area while
aw heel is being changed. Anyone who is not directly assisting in the wheel change should,
for example, stand behind the barrier.
X Get out of the vehicle. Pay attention to traffic
condition swhen doing so.
X Close the driver' sdoor.
X Place the warning triangle asuitable distance
away (Y page 222). Observe legal require-
ments. Batter
y(vehicle) Importan
tsafety notes
Wor kont hebattery, e.g. removing or fitting,
require sspecialist knowledge and th euse of
special tools. Therefore, always have wor kon
th eb attery carrie dout at aqualified specialist
workshop. G
WARNING
Work carried ou tincorrectly on the battery
can lead, for example, to ashort circui tand
thus damage the vehicl eelectronics. This can
leadtof unction restrictions applying to
safety-relevant systems ,e.g the lighting sys-
tem, the ABS (anti-lock braking system) or the
ESP ®
(Electronic Stability Program). The oper-
ating safety of yourv ehiclemay be restricted.
You coul dlose control of the vehicle, for
example:
R when braking
R in the event of abrupt steering manoeuvres
and/or when the vehicle's spee disnot
adapted to the road conditions
There is arisk of an accident.
In the event of ashort circui torasimilar inci-
dent, contact aqualified specialist workshop
immediately. Do not drive any further. Always have work on the battery carrie dout at a
qualified specialist workshop.
Further information about ABS (Y page52) and
ESP ®
(Y page5 4). G
WARNING
Electrostatic build-u pcan leadtot he creation
of sparks, which coul dignite the highly explo- 224
Battery (vehicle)Breakdown assistance

permit
schargin gofthe battery while it is fitted.
Contact aMercedes-Benz Service Centr efor
information and availability. Read the battery
charger's operatin ginstructions before charg-
ing the battery.
If the warning and indicator lamps do not light up on the instrument cluster when temperatures
are low, it is probably because the discharged battery has frozen. In this case, you may neither
jump-start the vehicle nor charge the battery.
The servic elife of abattery that has been
thawed may be reduced. The starting charac-
teristics may be impaired, especially at low tem- peratures. Have the thawed battery checked at
aq ualified specialist workshop. Jump-starting
For the jump-starting procedure, use only the jump-starting connection point, consisting of apos-
itive terminal and an earth point, in the engine compartment. G
WARNING
Batterya cid is caustic. There is arisk of injury.
Avoid contact with the skin, eyesorc lothing. Do not breathe in any battery gases. Do not leano ver
the battery .Keep the batterie sout of the reach of children. Immediately rinse off battery acid
thoroughly with plenty of clea nwaterand seek medical attention at once. G
WARNING
During charging and jump-starting, explosive gase scan escap efrom the battery .There is arisk
of an explosion.
Particularl yavoidfire, naked flames, creating sparks and smoking. Ensure there is sufficient
ventilation while charging and jump-starting. Do not leano verabattery. G
WARNING
During the charging process ,abattery produces hydrogen gas. If ashort circui toccurs or sparks
are created ,the hydrogen gas can ignite. There is arisk of an explosion.
R Make sure that the positive terminal of aconnected battery does not come into contact with
vehicl eparts.
R Never place metal objects or tools on abattery.
R It is important that you observe the described order of the battery terminal swhen connecting
and disconnecting abattery.
R When jump-starting, make sure that the battery pole swith identical polarity are connected.
R It is particularl yimportant to observe the described order when connecting and disconnecting
the jump leads.
R Never connect or disconnect the battery terminal swhile the engine is running. G
WARNING
Ad ischarged battery can freeze at temperatures below freezing point. When jump-starting the
vehicl eorcharging the battery ,gase scan escap efrom the battery .There is arisk of an explosion.
Allow the frozen battery to thaw out before charging it or jump-starting.
If the warning and indicator lamp sdonot light up on the instrument cluster when temperatures are
low,itisp robably because the discharged battery has frozen. In this case, you may neither jump-
start the vehicl enor charge the battery .The service life of abattery that has been thawe dmay be Jump-starting
227Breakdown assistance Z

reduced. The starting characteristics may be impaired, especially at low temperatures. Have the
thawe dbattery checked at aqualified specialist workshop.
Do not use arapidc harging device to start the vehicle. If yourv ehicle's battery is discharged, the
engine can be jump-started from another vehicl eorfromasecond battery using jump leads.
Observe the following points:
R The battery is not accessible in all vehicles. If the other vehicle's battery is not accessible, jump-
start the vehicl eusing adonor battery or ajump-starting device.
R Do not start the engine if the battery is frozen. Let the battery thaw first.
R Jump-starting may be performe donly using batterie swithanominal voltag eof12V.
R Use only jump leads that have asufficient cross-section and insulated terminal clamps.
R If the battery is full ydischarged, leave the battery that is being used to jump-start connected for
af ew minutes before attempting to start. This charge sthe empty battery alittle.
R Make sure that the two vehicles do not touch.
Make sure that:
R The jump leads are not damaged.
R Non-insulated parts of the terminal clamp sdonot come into contact with other metal parts while
the jump leads are connected to the battery.
R The jump leads cannot come into contact with parts that can move when the engine is running,
such as the V-belt pulley or the fan.
X Apply the parking brake.
X Shift the automatic transmission to position P.
X Make sure that the ignitio nisswitched off. All indicator lamp sonthe instrument cluster must be
off.
X Switch off all electrica lconsumers, e.g. rear windo wheating, lighting etc.
X Open the bonnet. Position number
Bidentifies the charged battery of the other vehicle or an equivalent jump-starting
device.
The jump-startin gconnection point consists of contacts ;and =. 228
Jump-startingBreakdowna
ssistan ce