check engine light MERCEDES-BENZ G-Class 2017 W463 Owner's Guide

Engine
Warning/
indicator
lampNSignaltype
Possible causes/consequences and M
Solutions
;NThe yellow CheckE nginew arning lamp lightsupw hile theengine is running.
Therem ay beamalfunction, for example:
Rin th eengine management
Rin th efuel injection system
Rin th eexhaust system
Rin th eignition system
Rin th efuel system
The emission limit values may be exceeded and th eengine may be in emergency
mode.
XVisitaq ualified specialist workshop immediately.
In somes tates, you must immediately visi taqualified specialist workshop as soon
as th eyellow CheckE nginew arning lamp lightsu p. This is due to thelegal require-
ments in effect in these states. If in doubt,c heck whether suchl egal regulations
apply in th estate in whichy ou are currently driving.
8NThe yellow reservef uel warning lamp lightsupw hile theengine is running.
The fuel leve lhas dropped int othe reserver ange.
XRefuel at th enearest gas station.
8NThe yellow reservef uel warning lamp flashes while th evehicle is in motion.
In addition,t he; CheckE nginew arning lamp may light up.
The fuel fille rcap is no tclosed correctly or th efuel system is leaking.
XCheckt hatthe fuel fille rcap is correctly closed.
XIf th efuelfiller cap is not correctly closed: close thefuel fille rcap.
XIf th efuelfiller cap is closed: visitaq ualified specialist workshop.
?NThe red coolant warning lamp lightsupw hile theengine is runnin gand the
coolant temperatur egauge is at th estart of th escale.
The temperatur esensor for th ecoolant temperatur egauge is malfunctioning.
The coolant temperatur eisnolonger beingm onitored. Thereisar isk of engine
damag eifthecoolant temperatur eistoohigh.
XPull ove rand stop th evehicle safely and switch off th eengine ,payinga ttention
to road and traffic conditions. Do no tcontinue driving unde rany circumstances.
XSecure th evehicle against rolling away (Ypage 120).
XConsult aqualified specialist workshop.
194Warning and indicator lamps in th einstrumen tcluster
On-boardc omputer and displays

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

Charging thebattery
!
Only use battery chargers witham aximum
chargin gvoltage of 14.8 V.
GWARNING
During chargin gand jump-starting, explosive
gases can escape from th ebattery. Thereisa
ris kofane xplosion.
Particularly avoid fire, open flames, creating
sparks and smoking. Ensure there is sufficient
ventilatio nwhile chargin gand jump-starting.
Do no tlean ove rabattery.
GWARNING
Battery acid is caustic .Thereisar iskofi njury.
Avoid contac twiths kin, eyes or clothing .Do
no tinhale any battery gases.Don otlean over
th eb attery. Keep childre naway from batter-
ies. Wash away battery acid immediately with
plenty of clean wate rand seek medical atten-
tion.
GWARNING
Ad ischarged battery can freezeatt empera-
tures below freezing point. When jump-start-
ing th evehicle or chargin gthe battery, gases
can escape from th ebattery. Thereisar isko f
an explosion.
Allow th efroze nbattery to thaw out before
chargin gitorjump-starting.
!Only charge th ebattery usingt hejump-
starting connection point.
The jump-startin gconnection pointisint he
enginec ompartmen t(
Ypage 243).
XOpen thehood.
XConnect th ebattery charge rtothepositive
terminal and ground pointint hesame order
as when connecting th edonor battery in the
jump-startin gprocedure (
Ypage 243).
Keep away from fir eand open flames. Do not
lean ove rabattery. Never charge th ebattery if it
is still installed in th evehicle ,unless you use a
battery charge rwhichh as been tested and
approved by Mercedes-Benz. Abattery charger
unit specially adapted for Mercedes-Ben zvehi-
cle sand tested and approved by Mercedes-
Ben zisa vailable as an accessory. It permits the
chargin gofthebattery in its installed position.
Contac tanauthorized Mercedes-Ben zCenter
for further informatio nand availability. Read the
battery charger's operatin ginstructionsb efore
chargin gthe battery.
If th ewarning and indic
ator lamps do no
tlight up
on th einstrumen tcluste rwhen temperatures
are low, it is probably because th edischarged
battery has frozen.Int hisc asey ou may neither
jump-star tthe vehicle no rcharge th ebattery.
The servic elife of athawed-out battery may be
shorter. The starting characteristic scan be
impaired, particularly at low temperatures. Have
th et hawed-out battery checked at aqualified
specialist workshop.
Jump-starting
For th ejump-startin gprocedure, use only th ejump-startin gconnection pointint heenginec om-
partment, consisting of apositiv etermi nal and aground point.
GWARNING
Battery acid is caustic .Thereisar iskofi njury.
Avoid contac twiths kin, eyes or clothing .Donotinhale any battery gases.Don otlean ove rthe
battery. Keep childre naway from batteries .Wash away battery acid immediately withp lenty of
clean wate rand seek medical attention.
GWARNING
During chargin gand jump-starting, explosive gases can escape from th ebattery. Thereisar isk
of an explosion.
Jump-starting243
Breakdown assistance
Z

Particularly avoid fire, open flames, creatingsparks and smoking. Ensure there is sufficient ven-
tilation while charging and jump-starting. Do not lean over abattery.
GWARNING
During the charging process, abattery produces hydrogen gas. If ashort circuit occurs or sparks
are created, the hydrogen gas can ignite. There is arisk of an explosion.
RMake sure that the positive terminal of aconnected battery does not come into contact with
vehicle parts.
RNever place metal object sortools on abattery.
RIt is importan tthat you observe the described order of the battery terminals when connecting
and disconnectin gabattery.
RWhen jump-starting, make sure that the battery poles with identical polarity are connected.
RIt is particularly importan ttoobserve the described order when connectin gand disconnecting
the jumper cables.
RNever connect or disconnect the battery terminals while the engine is running.
GWARNING
Ad ischarged battery can freeze at temperatures below freezin gpoint. When jump-starting the
vehicle or charging the battery, gases can escape from the battery. There is arisk of an explosion.
Allow the frozen battery to thaw out before charging it or jump-starting.
!Avoid repeated and lengthy starting attempts. Otherwise, the catalytic converter could be
damaged by the non-combusted fuel.
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 charge
the battery nor jump-start the vehicle. The service life of athawed-out battery may be shorter .The
starting characteristics can be impaired, particularly at low temperatures. Have the thawed-out
battery checked at aqualified specialist workshop.
Do not start the vehicle using arapid charging device. If your vehicle's battery is discharged, the
engine can be jump-started from another vehicle or from asecond battery using jumper cables.
Observe the following points:
RThe battery is not accessible in all vehicles. If the other vehicle's battery is not accessible, jump-
start the vehicle using asecond battery or ajump-starting device.
RYou may only jump-start the vehicle when the engine and exhaust system are cold.
RDo not start the engine if the battery is frozen. Let the battery thaw first.
RJump-starting may be performed only using batteries with anominal voltage of 12 V.
ROnly use jumper cables which have asufficient cross-section and insulated terminal clamps.
RIf the battery is fully discharged, leave the battery that is being used to jump-start connected for
afew minutes before attempting to start .This charges the battery slightly.
RMake sure that the two vehicles do not touch.
Make sure that:
Rthe jumper cables are not damaged.
Rwhen the jumper cables are connected to the battery, uninsulated sections of the terminal clamp
do not come into contact with other metal sections.
Rthe jumper cables cannot come into contact with parts which can move when the engine is
running, such as the V-belt pulley or the fan.
244Jump-starting
Breakdown assistance

XApply the parking brake.
XShift the automatic transmission to positionP.
XMake sure thatthe ignition is switched off. All indicator lamps in the instrument cluster must be
off.
XSwitch off al lelectrical consumers, e.g .rea rw indo wd efroster, lighting, etc.
XOpe nthe hood.
Position number Bidentifie sthe chargedb attery of the otherv ehicleorane quivalent jump-starting
device.
The jump-starting connectio npoint consists of contacts ;and =.
XLiftu pc over :of positive terminal ;in the direction of the arrow.
XConnect positive terminal ;on your vehicl etopositive terminal ?of donor battery Busing the
jumpe rcable .Alway sbegin with positive terminal ;on your ownv ehiclefirst.
XStar tthe engine of the donor vehicl eand runitati dlingspeed.
XConnect negative terminal Aof donor battery Bto ground point =of your vehicl eusing the
jumpe rcable ,connecting the jumpe rcable to donor battery Bfirst.
XStar tthe engine.
XBefore disconnecting the jumpe rcables, le tthe engine runf or severalminutes.
XFirst, remove the jumpe rcable sfrom ground point =and negative terminal A,then from pos-
itive clamp ;and positive terminal ?.Begin each time at the contacts on your ownv ehiclefirst.
XClose cover :of positive terminal ;afte rremoving the jumpe rcables.
XHav ethe battery checked at aquali fied specialist workshop.
Jump-starting is not considered to be anormalo perating condition.
iJumpe rcable sand furtheri nformationregarding jump-starting can be obtained at any qualified
specialist workshop.
Jump-starting245
Breakdo wn assis tance
Z