Get Breakdown assistance -> Battery (vehicle) Guide for Mercedes G Class SUV Third Generation (1990-2018)

Get out of the vehicle. Pay attention to

traffic conditions when doing so.

Close the driver's door.

Battery (vehicle)

Important safety notes

Special tools and expert knowledge are

required when working on the battery, e.g.

removal and installing. You should therefore

have all work involving the battery carried out

at a qualified specialist workshop.

WARNING

Work carried out incorrectly on the battery

can lead, for example, to a short circuit and

thus damage the vehicle electronics. This can

lead to function restrictions applying to

safety-relevant systems, e.g. the lighting

system, ABS (anti-lock braking system) or

ESP

(Electronic Stability Program). The

operating safety of your vehicle may be

restricted. You could lose control of the

vehicle, for example:

braking

in the event of abrupt steering maneuver

and/or when the vehicle's speed is not

adapted to the road conditions

There is a risk of an accident.

In the event of a short circuit or a similar

incident, contact a qualified specialist

workshop immediately. Do not drive any

further. You should have all work involving the

battery carried out at a qualified specialist

workshop.

If ABS malfunctions, the wheels can lock

during braking. This limits the steerability of

the vehicle when braking and may increase

the braking distance.

If ESP

malfunctions, the vehicle will not be

stabilized if it starts to skid or a wheel starts

to spin.

WARNING

Work carried out incorrectly on the battery

can, for example, lead to a short circuit and

damage your vehicle's electronic system. This

can disrupt driving safety systems such as

ABS (anti-lock braking system) or ESP

(Electronic Stability Program).

If ABS malfunctions, the wheels can lock

during braking. This limits the steerability

of the vehicle when braking and the braking

distance may increase. There is a risk of

accident.

If ESP

malfunctions, the vehicle will not be

stabilized if it starts to skid or a wheel starts

to spin. There is a risk of accident.

You should therefore have all work involving

the battery carried out at a qualified specialist

workshop.

WARNING

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.

Make sure that the positive terminal of a

connected battery does not come into

contact with vehicle parts.

Never place metal objects or tools on a

battery.

It is important that you observe the

described order of the battery terminals

when connecting and disconnecting a

battery.

When jump-starting, make sure that the

battery poles with identical polarity are

connected.

It is particularly important to observe the

described order when connecting and

disconnecting the jumper cables.

Never connect or disconnect the battery

terminals while the engine is running.

WARNING

Electrostatic build-up can lead to the creation

of sparks, which could ignite the highly

Battery (vehicle)

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explosive gases of a battery. There is a risk of

an explosion.

Before handling the battery, touch the vehicle

body to remove any existing electrostatic

build-up.

WARNING

Battery acid is caustic. There is a risk of injury.

Avoid contact with the skin, eyes or clothing.

Do not inhale any battery gases. Do not lean

over the battery. Keep children away from

batteries. Wash battery acid immediately with

water and seek medical attention.

Have the battery checked regularly at a

qualified specialist workshop.

Observe the service intervals in the

Maintenance Booklet or contact a qualified

specialist workshop for more information.

You should have all work involving the

battery carried out at a qualified specialist

workshop. In the exceptional case that it is

necessary for you to disconnect the battery

yourself, make sure that:

you switch off the engine and remove the

SmartKey. Check that all the indicator

lamps in the instrument cluster are off.

Otherwise, electronic components, such

as the alternator, may be damaged.

you first remove the negative terminal

clamp and then the positive terminal

clamp. Never swap the terminal clamps.

Otherwise, the vehicle's electronic

system may be damaged.

on vehicles with automatic transmission,

the transmission is locked in position P

after disconnecting the battery. The

vehicle is secured against rolling away.

You can then no longer move the vehicle.

The battery and the cover of the positive

terminal clamp must be installed securely

during operation.

Environmental 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

specialist workshop or a

special collection point for

used batteries.

In order for the battery to achieve the

maximum possible service life, it must always

be sufficiently charged.

Comply with safety precautions and take

protective measures when handling

batteries.

Risk of explosion.

Fire, open flames and smoking are

prohibited when handling the

battery. 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.

The vehicle battery, like other batteries, can

discharge over time if you do not use the

vehicle. In this case, have the battery

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Battery (vehicle)

Breakdown assistance

disconnected at a qualified specialist

workshop. You can also charge the battery

with a charger recommended by Mercedes-

Benz. Contact a qualified specialist workshop

for further information.

Explosive gases are created during charging

and jump-starting.

For safety reasons, Mercedes-Benz

recommends 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.

Have the battery condition of charge checked

more frequently if you use the vehicle mainly

for short trips or if you leave it standing idle

for a lengthy period. Consult a qualified

specialist workshop if you wish to leave your

vehicle parked for a long period of time.

Remove the SmartKey if you park the

vehicle and do not require any electrical

consumers. The vehicle will then use very

little energy, thus conserving battery

power.

i If the power supply has been interrupted,

e.g. due to a discharged battery, you will

have to:

set the clock. Information on setting the

clock can be found in the separate

operating instructions.

On vehicles with COMAND and a

navigation system, the clock is set

automatically.

reset the head restraints on the front

seats (Y page 87)

reset the function for folding the exterior

mirrors in/out automatically, by folding

the mirrors out once (Y page 93).

Charging the battery

WARNING

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

ventilation while charging and jump-starting.

Do not lean over a battery.

WARNING

Battery acid is caustic. There is a risk of injury.

Avoid contact with the skin, eyes or clothing.

Do not inhale any battery gases. Do not lean

over the battery. Keep children away from

batteries. Wash battery acid immediately with

water and seek medical attention.

WARNING

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.

Only charge the battery using the jump-

starting connection point.

Only use battery chargers with a

maximum charging voltage of 14.8 V.

Only charge the installed battery with a

battery charger which has been tested and

approved by Mercedes-Benz. These battery

chargers allow the battery to be charged

while still installed in the vehicle.

A battery charger unit specially adapted for

Mercedes-Benz vehicles and tested and

approved by Mercedes-Benz is available as an

accessory. Contact an authorized Mercedes-

Benz Center for information and availability.

Charge the battery in accordance with the

operating instructions for the battery

charger.

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The jump-starting connection point is in the

engine compartment (Y page 303).

Read the operating instructions for the

battery charger.

Open the hood (Y page 283).

Connect the battery charger to the positive

terminal and ground point in the same

order as when connecting the donor

battery in the jump-starting procedure

(Y page 303).

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Jump-starting

WARNING

Battery acid is caustic. There is a risk of injury.

Avoid contact with the skin, eyes or clothing. Do not inhale any battery gases. Do not lean over

the battery. Keep children away from batteries. Wash battery acid immediately with water and

seek medical attention.

WARNING

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

ventilation while charging and jump-starting. Do not lean over a battery.

WARNING

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.

Make sure that the positive terminal of a connected battery does not come into contact with

vehicle parts.

Never place metal objects or tools on a battery.

It is important that you observe the described order of the battery terminals when connecting

and disconnecting a battery.

When jump-starting, make sure that the battery poles with identical polarity are connected.

It is particularly important to observe the described order when connecting and disconnecting

the jumper cables.

Never connect or disconnect the battery terminals while the engine is running.

WARNING

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.

WARNING

Non-combusted fuel can collect in the exhaust system and ignite. There is a risk of fire. Avoid

repeated and lengthy starting attempts.

Avoid repeated and lengthy starting attempts. Otherwise, non-combusted fuel may

damage the catalytic converter and create a risk of fire.

Do not use a rapid charging device to start the vehicle.

Make sure the jumper cables are not damaged.

Make sure the jumper cables are not touching any other metal objects when they are

connected to the battery.

Jump-starting

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Breakdown assistance -> Battery (vehicle) for Your Mercedes G Class SUV Third Generation (1990-2018)

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