2018 MERCEDES-BENZ G-CLASS jump cable

General notes
HEnvironmental note
Protection of the environment is of primary
importance. Treat nature with respect.
Observe all prohibiting signs.
Read this section carefully before driving your
vehicle off-road. Practice by driving over more
gentle off-road terrain first.
Familiarize yourself with the characteristics of
your vehicle and the gear shift operation before
driving through difficult terrain.
The following driving systems are specially
adapted to off-road driving:
R4ETS (Ypage 59)
ROff-road ABS (Ypage 59)
RTransfer case (Ypage 149)
RDifferential locks (Ypage 151)
Observe the following notes:
Rstop the vehicle before you drive off-road and,
if necessary, shift the transfer case to the
LOW RANGE off-road gear (
Ypage 149).
REngage the differential locks if necessary
(Ypage 151).
iABS, 4ETS, ESP®and BAS are deactivated
while the differential locks are engaged. This
allows the front wheels to lock briefly, so that
these can dig into a loose surface. However,
please note that locked wheels skid and can
no longer steer.
RCheck that items of luggage and loads are
stowed safely and are well secured
(
Ypage 214).
RTo avoid damaging the vehicle, make sure
there is always sufficient ground clearance.
RAlways keep the engine running and in gear
when driving on a downhill gradient.
RAlways keep the engine running and in gear
when driving down an incline.
RDrive slowly and evenly, if necessary at a
walking pace.
REnsure that the wheels are in contact with the
ground at all times.
RDrive with extreme care on unfamiliar off-road
routes where visibility is poor. For safety rea-
sons, get out of the vehicle first and survey
the off-road route.
RCheck the depth of water before fording rivers
and streams.
RWatch out for obstacles.
RAlways keep the doors, rear door, side win-
dows and the sliding sunroof closed while the
vehicle is in motion.
RSwitch off cruise control.
RDo not deviate from marked routes.
RAdapt your speed to the terrain. The rougher,
steeper or more ruts on the terrain, the slower
your speed should be.
RDo not jump with the vehicle. as this will inter-
rupt the vehicle's propulsion.
RAvoid high engine speeds. Drive at appropri-
ate engine speeds (maximum 3,000 rpm).
RDo not shift the automatic transmission to
position i.
RAlways check the vehicle for damage after off-
road driving.
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.
You can obtain further information about mount-
ing special all-terrain tires from a qualified spe-
cialist workshop.
Checklist before driving off-road
!If the engine oil warning lamp lights up while
the vehicle is in motion, stop the vehicle in a
safe place as soon as possible. Check the
engine oil level. The engine oil warning lamp
warning must not be ignored. Continuing the
journey while the symbol is displayed could
lead to engine damage.
XEngine oil level: check the engine oil level
and add oil if necessary.
When driving on steep gradients, the engine
oil level must be sufficiently high to ensure a
correct oil supply in the vehicle.
XTire-changing tool kit: check that the jack is
working and make sure you have the lug
wrench, a robust tow cable and a folding
spade in the vehicle.
XWheels and tires: check the tire tread depth
and tire pressure.
XCheck for damage and remove any foreign
objects, e.g. small stones, from the wheels/
tires.
XReplace any missing valve caps.
130Driving tips
Driving and parking

sparks are created, the hydrogen gas can
ignite. There is a risk of an explosion.
RMake sure that the positive terminal of a
connected battery does not come into con-
tact with vehicle parts.
RNever place metal objects or tools on a bat-tery.
RIt is important that you observe the descri-
bed order of the battery terminals when
connecting and disconnecting a battery.
RWhen jump-starting, make sure that the
battery poles with identical polarity are
connected.
RIt is particularly important to observe the
described order when connecting and dis-
connecting the jumper cables.
RNever connect or disconnect the battery
terminals while the engine is running.
GWARNING
Battery acid is caustic. There is a risk of injury.
Avoid contact with skin, eyes or clothing. Do
not inhale any battery gases. Do not lean over
the battery. Keep children away from batter-
ies. Wash away battery acid immediately with
plenty of clean water and seek medical atten-
tion.
HEnvironmental note
Batteries contain dangerous
substances. It is against the
law to dispose of them with
the household rubbish. They
must be collected separately and recycled to protect the
environment.
Dispose of batteries in an
environmentally friendly
manner. Take discharged
batteries to a qualified spe-
cialist workshop or a special
collection point for used bat-
teries.
!Have the battery checked regularly at a
qualified specialist workshop. Observe the service intervals in the Mainte-
nance Booklet or contact a qualified specialist
workshop for more information.
!Always have work on batteries carried out at
a qualified specialist workshop.
Should it, in exceptional circumstances, be
absolutely necessary to disconnect the 12-
volt battery yourself, please observe the fol-
lowing:
RSecure the vehicle to prevent it from rolling
away.
RSwitch off the ignition.
RDisconnect the negative terminal first and
then the positive terminal.
The transmission is locked in position j
after disconnecting the battery.
After the work has been done, install the bat- tery and replace the cover of the positive ter-
minal clamp firmly.
Comply with safety precautions and take pro-
tective measures when handling batteries.
Risk of explosion.
Fire, open flames and smoking are
prohibited when handling the bat-
tery. Avoid creating sparks.
Battery acid is caustic.
Avoid contact with skin, eyes or
clothing.
Wear eye protection.
Keep children away.
Observe this Operator's Manual.
For safety reasons, Mercedes-Benz recom-
mends that you only use batteries which have
been tested and approved for your vehicle by
Mercedes-Benz. These batteries provide
increased impact protection to prevent vehicle
occupants from suffering acid burns should the
battery be damaged in the event of an accident.
Battery (vehicle)247
Breakdown assistance
Z

Jump starting
For the jump-starting procedure, use only the jump-starting connection point in the engine com-
partment, consisting of a positive terminal and a ground point.
GWARNING
Battery acid is caustic. There is a risk of injury.
Avoid contact with skin, eyes or clothing. Do not inhale any battery gases. Do not lean over the
battery. Keep children away from batteries. Wash away battery acid immediately with plenty of
clean water and seek medical attention.
GWARNING
During charging and jump-starting, explosive gases can escape from the battery. There is a risk of an explosion.
Particularly avoid fire, open flames, creating sparks and smoking. Ensure there is sufficient ven-
tilation while charging and jump-starting. Do not lean over a battery.
GWARNING
During the charging process, a battery produces hydrogen gas. If a short circuit occurs or sparks
are created, the hydrogen gas can ignite. There is a risk of an explosion.
RMake sure that the positive terminal of a connected battery does not come into contact with
vehicle parts.
RNever place metal objects or tools on a battery.
RIt is important that you observe the described order of the battery terminals when connecting
and disconnecting a battery.
RWhen jump-starting, make sure that the battery poles with identical polarity are connected.
RIt is particularly important to observe the described order when connecting and disconnecting
the jumper cables.
RNever connect or disconnect the battery terminals while the engine is running.
GWARNING
A discharged battery can freeze at temperatures below freezing point. When jump-starting the
vehicle or charging the battery, gases can escape from the battery. There is a risk 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 a thawed-out battery may be shorter. The
starting characteristics can be impaired, particularly at low temperatures. Have the thawed-out
battery checked at a qualified specialist workshop.
Jump starting249
Breakdown assistance
Z

Do not start the vehicle using a rapid charging device. If your vehicle's battery is discharged, the
engine can be jump-started from another vehicle or from a donor 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 a donor battery or a jump-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 a nominal voltage of 12 V.
ROnly use jumper cables which have a sufficient cross-section and insulated terminal clamps.
RIf the battery is fully discharged, leave the battery that is being used to jump-start connected for
a few 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.
XApply the parking brake.
XShift the automatic transmission to position j.
XMake sure that the ignition is switched off. All indicator lamps in the instrument cluster must be
off.
XSwitch off all electrical consumers, e.g. rear window defroster, lighting, etc.
XOpen the hood.
Position number Bidentifies the charged battery of the other vehicle or an equivalent jump-starting
device.
The jump-starting connection point consists of contacts ;and =.
250Jump starting
Breakdown assistance

XLift up cover:of positive terminal ;in the direction of the arrow.
XConnect positive terminal ;on your vehicle to positive terminal ?of donor battery Busing the
jumper cable. Always begin with positive terminal ;on your own vehicle first.
XStart the engine of the donor vehicle and run it at idling speed.
XConnect negative terminal Aof donor battery Bto ground point =of your vehicle using the
jumper cable, connecting the jumper cable to donor battery Bfirst.
XStart the engine.
XBefore disconnecting the jumper cables, let the engine run for several minutes.
XFirst, remove the jumper cables from ground point =and negative terminal A, then from pos-
itive clamp ;and positive terminal ?. Begin each time at the contacts on your own vehicle first.
XClose cover:of positive terminal ;after removing the jumper cables.
XHave the battery checked at a qualified specialist workshop.
Jump-starting is not considered to be a normal operating condition.
iJumper cables and further information regarding jump-starting can be obtained at any qualified
specialist workshop.
Towing and tow-starting
Important safety notes
GWARNING
Functions relevant to safety are restricted or
no longer available if:
Rthe engine is not running.
Rthe brake system or the power steering is
malfunctioning.
Rthere is a malfunction in the voltage supply or the vehicle's electrical system.
If your vehicle is being towed, much more
force may be necessary to steer or brake.
There is a risk of an accident.
In such cases, use a tow bar. Before towing,
make sure that the steering moves freely.
GWARNING
You can no longer steer the vehicle if the
steering wheel lock has been engaged. There
is a risk of an accident.
Always switch off the ignition when towing the
vehicle with a tow cable or a tow bar.
GWARNING
When towing or tow-starting another vehicle
and its weight is greater than the permissible
gross weight of your vehicle, the:
Rthe towing eye could detach itself
Rthe vehicle/trailer combination could roll-
over.
There is a risk of an accident.
When towing or tow-starting another vehicle,
its weight should not be greater than the per- missible gross weight of your vehicle.
Details on the permissible gross vehicle weight
of your vehicle can be found on the vehicle iden-
tification plate (
Ypage 282).
!When DISTRONIC PLUS or the HOLD func-
tion is activated, the vehicle brakes automat-
ically in certain situations.
To avoid damage to the vehicle, deactivate
DISTRONIC PLUS and the HOLD function in
the following or similar situations:
Rwhen towing the vehicle
Rin the car wash
!The vehicle can be towed a maximum of
30 miles (50km). The towing speed of 30 mph (50 km/h) must not be exceeded.
If the vehicle has to be towed more than
30 miles (50km), the entire vehicle must be
raised and transported.
Towing and tow-starting251
Breakdown assistance
Z

In the event of damage to the engine,
transmission or electrical system
XShift thetransfer cas eto neutra l
(Ypage 150).
XShift th eautomatic transmission to position
i.
In the event of damage to the transfer
case
Hav eth epropelle rshafts between th eaxles and
th etransfer cas eremoved.
In the event of damage to the front axle
Hav eth epropelle rshaf tbetween th erear axl e
and th etransfer cas eremoved.
Then hav eth evehicl etowed away wit hth efron t
axl eraised.
In the event of damage to the rear axle
Hav eth epropelle rshaf tbetween th efron taxl e
and th etransfer cas eremoved.
Then hav eth evehicl etowed wit hth erear axl e
raised and whee lroller sunder th efron taxle.
Tow-starting (emergency engine
starting)
!
Vehicles wit hautomatic transmission must
no tbe tow-started. You could otherwise dam-
age th eautomatic transmission .
You can fin dinformation on "Jump-starting "
under (
Ypage 249).
Fuses
Important safety notes
GWARNIN G
If you manipulat eor bridge afault yfus eor if
you replace it wit h afusewit h a higher amper-
age, th eelectric cables could be overloaded.
This could result in afire. Ther eis aris kof an
acciden tand injury.
Always replace fault yfuses wit hth especifie d
ne wfuses having th ecorrec tamperage .The fuses in your vehicl
eserve to close down
fault ycircuits. If afus eblows ,all th ecompo -
nent son th ecircuit and their function sstop
operating .
Blown fuses must be replace dwit hfuses of th e
sam erating ,whic hyou can recogniz eby th e
color and value .The fus erating sare listed in th e
fus eallocation chart (
Ypage 255).
If anewly inserted fus ealso blows ,hav eth e
caus etrace dand rectifie dat aqualified special-
ist workshop, e.g. an authorize dMercedes-Ben z
Center.
!Only use fuses that hav ebeen approve dfor
Mercedes-Ben zvehicles and whic hhav eth e
correc tfus erating for th esystem concerned.
Otherwise, component sor systems could be
damaged.
!Mak esur ethat no moisture can ente rth e
fus ebox when th ecover is open .
!When closingth ecover ,mak esur ethat it is
lyin gcorrectl yon th efus ebox .Moistur eseep -
ing in or dirt could oth
erwise impair th
eoper -
ation of th efuses.
Before changing a fuse
Pay attention to th eimportant safet ynote s
(Ypage 254).
XSwitc hoff th eengine.
XSwitc hoff all electrical consumers.
XRemove th eSmartKey from th eignition lock.
All indicator lamp sin th einstrumen tcluste r
must be off .
XSecureth evehicl eagainst rollin gaway
(Ypage 122).
The fuses are locate din various fus eboxes:
RMain fus ebox on th efront-passenger side of
th edashboar d
RFusebox in th efront-passenger footwell
RFus ebox in th etransmission tunne l
RFusebox in th ecargo compartmen t
The fus eallocation chart and th espar efuses are
in th efus ebox on th edashboar don th efront-
passenger side (
Ypage 255).
The fus eextractor is in th evehicl etool kit
(
Ypage 244).
254Fuses
Breakdown assistance