Get Breakdown assistance -> Battery (vehicle) Guide for Mercedes B Class SUV Third Generation (2018-2026)

When the tyre pressure is correct

Unscrew the lling hose from the valve of the

sealed tyre.

Screw the valve cap onto the valve of the

sealed tyre.

Stow the tyre sealant bottle and the tyre ina-

tion compressor.

Drive to the nearest qualied specialist work-

shop and have the tyre, tyre sealant bottle and

lling hose replaced.

Battery (vehicle)

Notes on the 12 V battery

WARNING Risk of explosion due to elec-

trostatic charge

Electrostatic charge can ignite the highly

explosive gas mixture in the battery.

To discharge any electrostatic charge

that may have built up, touch the metal

vehicle body before handling the battery.

The highly ammable gas mixture is created while

the battery is charging and during starting assis-

tance.

For safety reasons, Mercedes-Benz recommends

that you only use batteries which have been tes-

ted and approved for your vehicle by Mercedes-

Benz.

WARNING Danger of chemical burns from

the battery acid

Battery acid is caustic.

Avoid contact with the skin, eyes or

clothing.

Do not lean over the battery.

Do not inhale battery gases.

Keep children away from the battery.

Immediately rinse battery acid o thor-

oughly with plenty of clean water and

seek medical attention immediately.

ENVIRONMENTAL NOTE Environmental

damage due to improper disposal of bat-

teries

Batteries contain pollutants. It is illegal

to dispose of them with the household rub-

bish.

Dispose of batteries in an

environmentally responsible manner.

Take discharged batteries to a qualied

specialist workshop or to a collection

point for used batteries.

If you have to disconnect the 12 V battery, con-

tact a qualied specialist workshop.

Comply with safety notes and take protective

measures when handling batteries.

Risk of explosion.

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Fire, naked ames and smoking are pro-

hibited when handling the battery. Avoid

creating sparks.

Electrolyte or battery acid is corrosive.

Avoid contact with the skin, eyes or cloth-

ing. Wear suitable protective clothing, in

particular gloves, an apron and a face

mask. Immediately rinse electrolyte or

acid splashes o with clean water. Consult

a doctor immediately.

Wear safety glasses.

Keep children away.

Observe this Owner's Manual.

If you do not intend to use the vehicle over an

extended period of time:

Activate standby mode.

Connect the battery to a battery charger

approved by Mercedes-Benz.

Consult a qualied specialist workshop to dis-

connect the battery.

Notes on the 48 V battery

WARNING Risk of an accident due to work

carried out incorrectly on the battery

Work carried out incorrectly on the battery

can, for example, lead to a short circuit. This

can restrict functions relevant for safety sys-

tems and impair the operating safety of your

vehicle.

You could lose control of the vehicle in the fol-

lowing situations in particular:

when braking

in the event of abrupt steering manoeuvres

and/or when the vehicle's speed is not

adapted to the road conditions

In the event of a short circuit or a similar

incident, contact a qualied specialist

workshop immediately.

Do not drive on.

Always have work on the battery carried

out at a qualied specialist workshop.

Further information on ABS (/ page 312)

Further information on ESP

(/ page 313)

ENVIRONMENTAL NOTE Environmental

damage due to improper disposal of bat-

teries

Batteries contain pollutants. It is illegal

to dispose of them with the household rub-

bish.

Dispose of batteries in an environ-

mentally responsible manner. Take dis-

charged batteries to a qualied specialist

workshop or to a collection point for

used batteries.

Only have work on the 48 V battery carried out at

a qualied specialist workshop.

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F247 0072 02

Comply with safety notes and take protective

measures when handling batteries.

Risk of explosion if the 48 V battery is

used improperly.

The surface of the 48 V battery may be

hot.

Fire, naked ames and smoking are pro-

hibited when handling the battery. Avoid

creating sparks.

Electrolyte or battery acid is corrosive.

Avoid contact with the skin, eyes or cloth-

ing. Wear suitable protective clothing, in

particular gloves, an apron and a face

mask. Immediately rinse o splashes of

electrolyte or acid with plenty of clean

water. Consult a doctor immediately.

Do not place heavy objects on the surface

of the battery or use the battery to sup-

port a person in any way.

Do not perform any work on the battery.

Always have any work on the battery car-

ried out at a qualied specialist workshop.

Do not disconnect the battery yourself.

Do not remove the battery yourself. Do

not attempt to open the battery.

Keep children away.

Wear safety glasses.

Observe this Owner's Manual.

Observe the following if you do not intend to use

the vehicle over an extended period of time:

If available: activate standby mode

(/ page 309, 310).

Notes on the high-voltage battery

DANGER Risk of re and explosion from

excessive internal pressure of the high-

voltage battery

In the event of a vehicle re, ammable gas

can escape and ignite.

Stop the charging process immediately

in case of unusual odours, smoke or

burn marks.

Leave the danger zone immediately.

Secure the danger zone at a sucient

distance.

Call the re service.

Observe the notes on charging the high-voltage

battery (/ page 280).

Risk of explosion.

Fire, naked ames and smoking are pro-

hibited when handling the battery. Avoid

creating sparks.

Electrolyte or battery acid is corrosive.

Avoid contact with the skin, eyes or cloth-

ing. Wear suitable protective clothing, in

particular gloves, an apron and a face

mask. Immediately rinse electrolyte or

acid splashes o with clean water. Consult

a doctor immediately.

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Wear safety glasses.

Keep children away.

Observe this Owner's Manual.

Notes on starting assistance and charging the 12

V battery

Always use the jump-start connection point in the

engine compartment for battery charging and

starting assistance.

NOTE Damage to the battery due to over-

voltage

When charging using a battery charger without

a maximum charging voltage, the battery or

the on-board electronics may be damaged.

Only use battery chargers with a maxi-

mum charging voltage of 14.8 V.

WARNING Risk of explosion due to the

ignition of hydrogen gas

If there is a short circuit or sparks are created,

there is a danger of hydrogen gas igniting

when you charge the battery.

Take care 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.

When connecting and disconnecting the

battery, always observe the sequence of

battery terminals described.

During starting assistance, always take

care to connect only battery terminals of

identical polarity.

During starting assistance, observe the

sequence described for connecting and

disconnecting the jump leads.

Do not connect or disconnect the bat-

tery terminals with the engine running.

WARNING Risk of explosion due to explo-

sive mixture of gases

An explosive mixture of gases can escape

from the battery during charging and starting

assistance.

Fire, naked ames, smoking and creating

sparks must be avoided.

Make sure there is adequate ventilation.

Do not stand over the battery.

WARNING Risk of explosion from a frozen

battery

A discharged battery may freeze at tempera-

tures slightly above or below freezing point.

During starting assistance or battery charging,

battery gas can be released.

Always allow a battery to thaw before

charging it or performing starting assis-

tance.

If the indicator/warning lamps in the instrument

display do not light up in cold temperatures, the

discharged battery is very probably frozen. In this

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case you must neither charge the battery nor

jump-start the vehicle.

The operating life of a thawed battery may be

drastically shortened. The starting behaviour may

deteriorate, especially in low temperatures.

It is recommended that a thawed battery be

checked in a qualied specialist workshop.

NOTE Damage caused by numerous or

extended attempts to start the engine

Numerous or extended attempts to start the

engine may damage the catalytic converter

due to non-combusted fuel.

Avoid numerous and extended attempts

to start the engine.

Observe the following points during starting assis-

tance and battery charging:

Only use undamaged jump leads/charging

cables with a sucient cross-section and

insulated terminal clamps.

Uninsulated parts of the terminal clamps must

not come into contact with other metal parts

while the jump leads/charging cables are con-

nected to the battery/jump-start connection

point.

The jump leads/charging cables must not

touch any parts that can move when the

engine is running.

Always make sure that neither you nor the bat-

tery are electrostatically charged.

Be absolutely sure to keep away from re and

naked ames.

Do not lean over a battery.

Observe the following additional points when

charging the battery:

Only use chargers that have been tested and

approved by Mercedes-Benz.

Read the operating instructions for the

charger before charging the battery.

Observe the additional following points during

starting assistance:

For starting assistance, only use batteries with

a nominal voltage of 12 V.

The vehicles must not touch each other.

Petrol engine: only receive starting assistance

when the engine is cold and the exhaust sys-

tem has cooled.

Starting assistance and charging the 12 V battery

Starting assistance/preparation for charging

Secure the vehicle with the electric parking

brake.

Shi the transmission to position j.

Switch the vehicle and all electrical consum-

ers o.

Open the bonnet.

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Slide the cover 1 of the positive terminal 2

on the jump-start connection point in the

direction of the arrow.

Starting assistance

Connect the jump lead to the positive terminal

of your vehicle.

Connect the jump lead to the positive terminal

of the donor battery.

Run the engine of the assisting vehicle at

idling speed.

Connect the jump lead to the negative termi-

nal of the donor battery.

Connect the jump lead to the earth point 3

of your vehicle.

Start the engine of your vehicle.

Let the engine run for a few minutes.

Before disconnecting the jump leads, switch

on an electrical consumer in your vehicle, e.g.

the rear window heating or lights.

When the starting assistance has been comple-

ted:

Disconnect the jump lead from the earth point

3 of your vehicle.

Disconnect the jump lead from the negative

terminal of the donor battery.

Disconnect the jump lead from the positive

terminal of your own vehicle.

Disconnect the jump lead from the positive

terminal of the donor battery.

Aer removing the jump leads, close the cover

1 of the positive terminal 2.

Plug-in hybrid: if the vehicle has been jump-star-

ted, the electric drive system may not be available

for around 30 minutes.

Further information can be obtained at a qualied

specialist workshop.

Charging the 12 V battery

Connect the charging cable to the positive ter-

minal of your vehicle.

Connect the charging cable to the positive ter-

minal of the charger.

Connect the charging cable to the negative

terminal of the charger.

Connect the charging cable to the earth point

3 of your vehicle.

Start the charging procedure.

When the charging procedure has been comple-

ted:

Disconnect the charging cable from the earth

point 3 of your vehicle.

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Breakdown assistance -> Battery (vehicle) for Your Mercedes B Class SUV Third Generation (2018-2026)

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