Get Breakdown assistance -> Batteries Guide for Mercedes B Class SUV Second Generation (2011-2017)

Drive to the nearest qualified specialist work-

shop and have the tire changed there.

Have the tire sealant bottle and the filler hose

replaced as soon as possible at a qualified

specialist workshop.

Have the tire sealant bottle replaced every

four years at a qualified specialist workshop.

Batteries

12 V battery – important safety notes

Special tools and expert knowledge are required

when working on the batteries, e.g. removal and

installation. You should therefore have all work

involving the batteries carried out at a qualified

specialist workshop.

WARNING

The battery terminal clamps can remain under

voltage even after being disconnected. If work

on the battery is carried out incorrectly, a

short-circuit may result. There is a risk of fire.

Always have work on the batteries carried out

at a qualified specialist workshop. Never dis-

connect a battery yourself.

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 sys-

tem, the ABS (anti-lock braking system) or the

ESP

(Electronic Stability Program). The oper-

ating safety of your vehicle may be restricted.

You could lose control of the vehicle, for

example:

when braking

in the event of abrupt steering maneuvers

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 inci-

dent, contact a qualified specialist workshop

immediately. Do not drive any further. You

should have all work involving the battery car-

ried out at a qualified specialist workshop.

For further information about ABS and ESP

see (Y page 59) and (Y page 62).

WARNING

Electrostatic build-up can lead to the creation

of sparks, which could ignite the highly explo-

sive 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.

The highly flammable gas mixture forms when

charging the battery as well as when jump-start-

ing.

Always make sure that neither you nor the bat-

tery is electrostatically charged. A build-up of

electrostatic charge can be caused, for exam-

ple:

by wearing clothing made from synthetic

fibers

due to friction between clothing and seats

if you push or pull the battery across the car-

pet or other synthetic materials

if you rub the battery with a cloth

WARNING

During the charging process, a battery produ-

ces 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 con-

tact with vehicle parts.

Never place metal objects or tools on a bat-

tery.

It is important that you observe the descri-

bed 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.

246

Batteries

Breakdown assistance

It is particularly important to observe the

described order when connecting and dis-

connecting the jumper cables.

Never connect or disconnect the battery

terminals while the engine is running.

WARNING

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.

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 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.

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 suitable protective clothing,

especially gloves, apron and face-

guard.

Rinse any acid spills immediately

with clear water. Contact a physician

if necessary.

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.

In order for the battery to achieve the maximum

possible service life, it must always be suffi-

ciently charged.

Like other batteries, the vehicle battery may

discharge over time if you do not use the vehicle.

In this case, have the battery disconnected at a

qualified specialist workshop. You can also

charge the battery with a charger recommended

by Mercedes-Benz. Contact a qualified special-

ist workshop for further information.

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.

Only replace a battery with a battery that has

been recommended by Mercedes-Benz.

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.

After an interruption to the power supply, such

as due to a discharged battery, you must reset

the clock via the multimedia system. You can

Batteries

247

Breakdown assistance

find further information in the separate operat-

ing instructions.

Charging the 12‑volt 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 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.

WARNING

A discharged battery can freeze at tempera-

tures below freezing point. When jump-start-

ing 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 use battery chargers with a maximum

charging voltage of 14.8 V.

Only charge the battery using the jump-

starting connection point.

The jump-starting connection point is in the

engine compartment (Y page 249).

Open the hood.

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 249).

If the indicator/warning lamps do not light up in

the instrument cluster at low temperatures, it is

very likely that the discharged battery has fro-

zen. In this case you may neither jump-start the

vehicle nor charge the battery. The service life of

a thawed-out battery may be shorter. The start-

ing characteristics can be impaired, particularly

at low temperatures. Have the thawed-out bat-

tery checked at a qualified specialist workshop.

Only charge the installed battery with a battery

charger which has been tested and approved by

Mercedes-Benz. A battery charger unit specially

adapted for Mercedes-Benz vehicles and tested

and approved by Mercedes-Benz is available as

an accessory. It permits the charging of the bat-

tery in its installed position. Contact an author-

ized Mercedes-Benz Center for further informa-

tion and availability. Read the battery charger's

operating instructions before charging the bat-

tery.

High-voltage battery – important

safety notes

DANGER

The vehicle's high-voltage electrical system is

under high voltage. If you modify components

in the vehicle's high-voltage electrical system

or touch damaged components, you may be

electrocuted. The components in the vehi-

cle's high-voltage electrical system may be

damaged in an accident, although the damage

is not visible. There is a risk of fatal injury.

Following an accident, do not touch any high-

voltage components and never modify the

vehicle's high-voltage electrical system. Have

the vehicle towed away after an accident and

the vehicle's high-voltage electrical system

checked by a qualified specialist workshop.

WARNING

In the event of a vehicle fire, the internal pres-

sure of the high-voltage battery can exceed a

critical value. In this case flammable gas

escapes through a ventilation valve on the

underbody. The gas can ignite. There is a risk

of injury.

Leave the danger zone immediately. Secure

the danger area at a suitable distance, whilst

observing legal requirements.

248

Batteries

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Breakdown assistance -> Batteries for Your Mercedes B Class SUV Second Generation (2011-2017)

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