Get Breakdown assistance -> Battery (vehicle) Guide for Mercedes CLA 4 Door Second Generation (2019-2024)

TTo ro reduce teduce the tirhe tire pre pressuressure:e: press pressure

release button 1 next to manometer 2.

When the tire pressure is correct, unscrew the

lling hose from the valve of the sealed tire.

Screw the valve cap onto the valve of the

sealed tire.

Pull the tire sealant bottle out of the tire ina-

tion compressor.

The lling hose stays on the tire sealant bottle.

Drive to the nearest qualied specialist work-

shop and have the tire, tire sealant bottle and

lling hose replaced there.

BattBatterery (vy (vehicle)ehicle)

NNoottes on tes on the 12 V batthe 12 V batteryery

WARNINGARNING 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 maneuvers

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 159)

Further information on ESP

(/ page 159)

For safety reasons, Mercedes-Benz recommends

that you only use batteries which have been tes-

ted and approved for your vehicle by Mercedes-

Benz.

All v

All vehicles exehicles excepcept vt vehicles witehicles with a lith a lithium-ion bat-hium-ion bat-

tteryery

WARNINGARNING 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.

Breakdown assistance

281

WARNINGARNING 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.

All vAll vehiclesehicles

ENVIR

ENVIRONMENTONMENTAL NOAL NOTETE Environmental

damage due to improper disposal of bat-

teries

Batteries contain pollutants. It is

illegal to dispose of them with the household

rubbish.

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.

Fire, open ames and smoking are

prohibited when handling the battery.

Avoid creating sparks.

Electrolyte or battery acid is corrosive.

Avoid contact with the skin, eyes or

clothing. 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 if neces-

sary.

Wear safety glasses.

Keep children away.

Observe this Operator's Manual.

Observe the following if you do not intend to use

the vehicle over an extended period of time:

Activate standby mode.

Alternatively: connect the battery to a battery

charger approved by Mercedes-Benz or con-

sult a qualied specialist workshop to discon-

nect the battery.

282282

Breakdown assistance

NNoottes on stes on stararting assistting assistance and cance and charharging tging the 12he 12

V battV batteryery

All vAll vehiclesehicles

When charging the battery and during starting

assistance, always use the jump-start connection

point in the engine compartment.

NOTETE Damage to the battery from 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.

WARNINGARNING Risk of explosion due to igniting

hydrogen gas

If there is a short circuit or sparks start to

form when charging a battery, there is a dan-

ger of the hydrogen gas igniting.

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.

Always take care to connect only battery

terminals of identical polarity when jump

starting a vehicle.

During starting assistance, it is essential

to observe the sequence described for

connecting and disconnecting the

jumper cables.

Do not connect or disconnect the bat-

tery terminals while the engine is run-

ning.

WARNINGARNING Risk of explosion due to a mix-

ture of explosive gases

A mixture of explosive gases can escape from

the battery during charging and jump starting.

Fire, open ames, smoking and creating

sparks must be avoided.

Make sure that there is sucient ventila-

tion.

Do not stand over the battery.

WARNINGARNING 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

cluster do not light up at low temperatures, it is

very likely that the discharged battery has frozen.

In this case you may neither jump-start the vehi-

cle nor charge the battery.

The service life of a battery that has been thawed

may be dramatically shortened. The starting char-

Breakdown assistance

283

acteristics may be impaired, especially at low

temperatures.

It is recommended that you have a thawed battery

checked at a qualied specialist workshop.

All v

All vehiclesehicles

NOTETE 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 when charging the battery:

Only use undamaged jumper cables/charging

cables with a sucient cross-section and

insulated terminal clamps.

Non-insulated parts of the terminal clamps

must not come into contact with other metal

parts while the jumper cable/charging cable

is connected to the battery/jump-start con-

nection point.

The jumper cable/charging cable must not

come into contact with any parts which may

move when the engine is running.

Always make sure that neither you nor the bat-

tery is electrostatically charged.

Keep away from re and open ames.

Do not lean over the battery.

Observe the additional following points when

charging the battery:

Only use battery chargers tested and

approved for Mercedes-Benz.

Read the battery charger's operating instruc-

tions before charging the battery.

Observe the additional following points during

starting assistance:

Starting assistance may only be provided

using vehicles, batteries or other jump start

devices with a nominal voltage of 12 V.

The vehicles must not touch.

Vehicles witehicles with a gh a gasoline engine:asoline engine: jump-start the

vehicle only when the engine and exhaust sys-

tem are cold.

SSttararting assistting assistance and cance and charharging tging the 12 V batthe 12 V batteryery

RReqequiruirements:ements:

The vehicle is secured with the electric park-

ing brake.

Vehicles witehicles with auth automatic tromatic transmission:ansmission: The

transmission is in position j.

The vehicle and all electrical consumers are

switched o.

The hood is open.

284284

Breakdown assistance

Example: engine compartment

Slide cover 1 of POSITIVE contact 2 on the

jump-starting connection point in the direction

of the arrow.

Connect POSITIVE contact 2 on your vehicle

to the positive terminal of the donor battery

using the jumper cable/charging cable.

Always begin with POSITIVE contact 2 on

your own vehicle rst.

DurDuring sting stararting assistting assistance:ance: start the engine of

the donor vehicle and run at idle speed.

Connect the negative terminal of the donor

battery and ground point 3 of your own vehi-

cle by using the jumper cable/charging cable.

Begin with the donor battery rst.

DurDuring sting stararting assistting assistance:ance: start the engine of

your own vehicle.

DurDuring ting the che charharging prging process:ocess: start the charg-

ing process.

DurDuring sting stararting assistting assistance:ance: let the engines run

for several minutes.

DurDuring sting stararting assistting assistance:ance: before disconnect-

ing the jumper cable, switch on an electrical

consumer on your own vehicle, e.g. the rear

window heater or lighting.

When the starting assistance/charging process is

complete, perform the following steps:

First, remove the jumper cable/charging cable

from ground point 3 and the negative termi-

nal of the donor battery, then POSITIVE con-

tact 2 and the positive terminal of the donor

battery. Begin each time with the contacts on

your own vehicle rst.

Aer removing the jumper cable/charging

cable, close cover 1 of POSITIVE contact

Further information can be obtained at a qualied

specialist workshop.

RReplacing teplacing the 12 V batthe 12 V batteryery

Observe the notes on the 12 V battery

(/ page 281).

Mercedes-Benz recommends that you have the

12 V battery replaced at a qualied specialist

workshop, e.g. at an authorized Mercedes-Benz

Center.

Observe the following notes if you want to replace

the battery yourself:

Always replace a faulty battery with a battery

which meets the specic vehicle require-

ments.

Breakdown assistance

285

The vehicle is equipped with an AGM technol-

ogy battery (Absorbent Glass Mat) or a lith-

ium-ion battery. Full vehicle functionality is

only guaranteed with an AGM battery or lith-

ium-ion battery. For safety reasons, Mercedes-

Benz recommends that you only use batteries

which have been tested and approved for your

vehicle by Mercedes-Benz.

Carry over detachable parts, such as vent

hoses, elbow ttings or terminal covers from

the battery being replaced.

Make sure that the vent hose is always con-

nected to the original opening on the side of

the battery.

Install any existing or supplied cell caps.

Otherwise, gases or battery acid could

escape.

Make sure that detachable parts are recon-

nected in the same way.

TToow stw stararting or toting or towing awaywing away

PPerermittmitted toed towing metwing methods (non plug-in hhods (non plug-in hybrybrid)id)

Mercedes-Benz recommends transporting your

vehicle in the case of a breakdown, rather than

towing it away.

For towing, use a tow rope or tow bar with both

axles on the ground. Do not use tow bar systems.

WARNINGARNING Risk of accident when towing

with steering wheel locking

When the steering wheel locking is engaged,

you can no longer steer the vehicle.

Always switch on the vehicle when tow-

ing with a tow rope or tow bar.

NOOTETE Damage to the vehicle due to tow-

ing away incorrectly

Observe the instructions and notes on

towing away.

286286

Breakdown assistance

Breakdown assistance -> Battery (vehicle) for Your Mercedes CLA 4 Door Second Generation (2019-2024)

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