Get Breakdown assistance -> Battery Guide for Mercedes GLC Class SUV First Generation (2015-2021)

Breakdown assistance 443

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Stop driving after approximately ten minutes

and check the tire pressure using the tire

inflation compressor.

The tire pressure must now be at least

130 kPa (1.3 bar/19 psi).

Loading Information placard on the B‑pillar

on the driver's side or the tire pressure table

in the fuel filler flap for values.

To increase the tire pressure: switch on

the tire inflation compressor.

Pull the tire sealant bottle out of the tire

inflation compressor.

The filling hose stays on the tire sealant bot‐

tle.

Drive to the nearest qualified specialist work‐

shop and have the tire, tire sealant bottle

and filling hose replaced there.

#

&

WARNING Risk of accident due to the

specified tire pressure not being reached

If the specified tire pressure is not reached

after a brief drive, the tire is too badly dam‐

aged. The tire sealant cannot repair the tire

in this instance.

Damaged tires and tire pressure that is too

low can significantly impair the braking prop‐

erties and the handling characteristics.

Battery (vehicle)

Notes on the 12 V battery

&

WARNING Risk of an accident due to

work carried out incorrectly on the bat‐

tery

Work carried out incorrectly on the battery

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

can lead to function restrictions in safety-rel‐

evant systems, for example the lighting sys‐

tem, ABS (anti-lock braking system) or ESP^®

(Electronic Stability Program). The operating

safety of your vehicle may be restricted.

#

Do not continue driving.

Consult a qualified specialist workshop.

#

To reduce the tire pressure: press pressure

release button 1 next to manometer 2.

When the tire pressure is correct, unscrew

the filling hose from the valve of the sealed

tire.

#

In cases such as the one mentioned above, con‐

tact an authorized Mercedes-Benz Center. Or

call 1-800-FOR-MERCedes (in the USA) or

1-800-387-0100 (in Canada).

#

Screw the valve cap onto the valve of the

sealed tire.

#

Correct the tire pressure if it is still at least

130 kPa (1.3 bar/19 psi). See the Tire and

444 Breakdown assistance

All vehicles except vehicles with a lithium-

ion battery

#

You could lose control of the vehicle in the

following situations:

Do not inhale battery gases.

Keep children away from the battery.

Immediately rinse battery acid off thor‐

oughly with plenty of clean water and

seek medical attention immediately.

R

when braking

&

WARNING Risk of explosion due to elec‐

trostatic charge

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in the event of abrupt steering maneuvers

and/or when the vehicle's speed is not

adapted to the road conditions

Electrostatic charge can cause sparks which

may ignite the highly flammable gas mixture

in the battery.

All vehicles

#

In the event of a short circuit or a simi‐

lar incident, contact a qualified special‐

ist workshop immediately.

Do not continue driving.

Always have work on the battery carried

out at a qualified specialist workshop.

#

To discharge any electrostatic charge

ENVIRONMENTAL NOTE Environmental

damage caused by improper disposal of

batteries

+

that may have built up, touch the metal

vehicle body before handling the bat‐

tery.

#

The highly flammable gas mixture is created

while the battery is charging and during starting

assistance.

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Further information on ABS (/ page 185)

Further information on ESP^®(/ page 186)

Batteries contain pollutants. It is

illegal to dispose of them with the household

rubbish.

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&

WARNING Danger of chemical burns

from the battery acid

For safety reasons, Mercedes-Benz recommends

that you only use batteries which have been tes‐

ted 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 dam‐

aged in the event of an accident.

#

Battery acid is caustic.

#

Dispose of batteries in an

environmentally responsible manner.

Take discharged batteries to a qualified

Avoid contact with the skin, eyes or

clothing.

Do not lean over the battery.

#

Breakdown assistance 445

Notes on starting assistance and on charg‐

ing the 12 V battery

Wear safety glasses.

specialist workshop or to a collection

point for used batteries.

Vehicles with a lithium-ion battery

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

tact a qualified specialist workshop.

Comply with safety notes and take protective

measures when handling batteries.

When charging the battery and during starting

assistance, always use the jump-start connec‐

tion point in the engine compartment.

Keep children away.

NOTE Damaging the battery through

overvoltage

*

Risk of explosion.

Observe this Operator's Manual.

When charging using a battery charger with‐

out a maximum charging voltage, the battery

or the vehicle electronics may be damaged.

Fire, open flames and smoking are

prohibited when handling the battery.

Avoid creating sparks.

Observe the following if you do not intend to use

the vehicle over an extended period of time:

#

Only use battery chargers with a maxi‐

mum charging voltage of 14.8 V.

R

Activate standby mode.

Electrolyte or battery acid is corro‐

sive. 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 off

with clean water. Consult a doctor if

necessary.

R

Alternatively: connect the battery to a bat‐

All other vehicles

tery charger approved by Mercedes-Benz or

consult a qualified specialist workshop to

disconnect the battery.

When charging the battery and during starting

assistance, always use the jump-start connec‐

tion point in the engine compartment.

446 Breakdown assistance

#

When giving starting assistance, always

make sure that you only connect bat‐

tery terminals with identical polarity.

During starting assistance, you must

observe the described order for con‐

necting and disconnecting the jumper

cables.

&

NOTE Damaging the battery through

WARNING Risk of explosion from a fro‐

*

overvoltage

zen battery

A discharged battery may freeze at tempera‐

tures slightly above or below freezing point.

During starting assistance or battery charg‐

ing, battery gas may be released.

When charging using a battery charger with‐

out a maximum charging voltage, the battery

or the vehicle electronics may be damaged.

#

Only use battery chargers with a maxi‐

mum charging voltage of 14.8 V.

#

Always thaw a frozen battery out first

before charging it or performing start‐

ing assistance.

#

Do not connect or disconnect the bat‐

tery clamps while the engine is running.

&

WARNING Risk of explosion from hydro‐

gen gas igniting

&

WARNING Risk of explosion during

charging process and starting assistance

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 fro‐

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

vehicle nor charge the battery.

The service life of a battery that has been

thawed may be dramatically shortened. The

starting characteristics may be impaired, espe‐

cially at low temperatures.

A battery generates hydrogen gas during the

charging process. If there is a short circuit or

sparks start to form, there is a danger of the

hydrogen gas igniting.

During the charging process and starting

assistance, the battery may release an explo‐

sive gas mixture.

#

Make sure that the positive terminal of

the 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, you must observe the descri‐

bed order for the battery clamps.

#

Avoid fire, open flames, creating sparks

and smoking.

Make sure that there is sufficient venti‐

lation during the charging process and

during starting assistance.

#

It is recommended that you have a thawed bat‐

tery checked at a qualified specialist workshop.

#

Do not lean over a battery.

Breakdown assistance 447

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Starting assistance and charging the 12 V

battery

Plug-in hybrid: be sure to observe the notes in

the Supplement. Otherwise, you may fail to rec‐

ognize dangers.

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

battery is electrostatically charged.

Keep away from fire and open flames.

Do not lean over the battery.

Requirements:

All vehicles

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The vehicle is secured with the electric park‐

ing brake.

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NOTE Damage caused by numerous or

extended attempts to start the engine

*

^RVehicles with automatic transmission:

The transmission is in position j.

Numerous or extended attempts to start the

engine may damage the catalytic converter

due to non-combusted fuel.

R

The ignition and all electrical consumers are

Observe the additional following points when

charging the battery:

switched off.

R

The hood is open.

R

Only use battery chargers tested and

approved for Mercedes-Benz.

#

Avoid numerous and extended attempts

to start the engine.

R

Read the battery charger's operating instruc‐

tions before charging the battery.

Observe the following points during starting

assistance and when charging the battery:

Observe the additional following points during

starting assistance:

R

Only use undamaged jumper cables/charg‐

ing cables with a sufficient cross-section and

insulated terminal clamps.

R

Starting assistance may be performed using

only batteries with a nominal voltage of 12 V.

R

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.

R

The vehicles must not touch.

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Vehicles with a gasoline engine: Jump-

start the vehicle only when the engine and

exhaust system are cold.

448 Breakdown assistance

#

begin with positive clamp 2 on your own

First, remove the jumper cable/charging

cable from ground point 3 and the negative

pole of the donor battery, then from positive

clamp 2 and the positive pole of the donor

battery. Begin each time with the contacts

on your own vehicle first.

vehicle first.

#

During starting assistance: start the

engine of the donor vehicle and run at idle

speed.

Connect the negative pole of the donor bat‐

tery and ground point 3 of your own vehicle

by using the jumper cable/charging cable.

Begin with the donor battery first.

#

After removing the jumper cable/charging

cable, close cover 1 of positive clamp 2.

Further information can be obtained at a quali‐

fied specialist workshop.

#

During starting assistance: start the

engine of your own vehicle.

During the charging process: start the

Replacing the 12 V battery

charging process.

#

Observe the notes on the 12 V battery

(/ page 443).

During starting assistance: let the engines

run for several minutes.

During starting assistance: before discon‐

necting the jumper cable, switch on an elec‐

trical consumer in your own vehicle, e.g. the

rear window heater or lighting.

Example: engine compartment

Mercedes-Benz recommends that you have the

12 V battery replaced at a qualified specialist

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

Center.

#

Slide cover 1 of positive clamp 2 on the

jump-starting connection point in the direc‐

tion of the arrow.

#

Connect positive clamp 2 on your vehicle to

When the starting assistance/charging process

is complete, perform the following steps:

the positive pole of the donor battery using

the jumper cable/charging cable. Always

Breakdown assistance 449

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Observe the following notes if you want to

replace the battery yourself:

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.

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 sys‐

tems.

R

Always replace a faulty battery with a battery

which meets the specific vehicle require‐

ments.

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.

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Make sure that detachable parts are recon‐

nected in the same way.

NOTE Damage to the vehicle due to tow‐

ing away incorrectly

*

#

Observe the instructions and notes on

towing away.

Tow starting or towing away

Permitted towing methods

Plug-in hybrid: be sure to observe the notes in

the Supplement. Otherwise, you may fail to rec‐

ognize dangers.

R

Carry over detachable parts, such as vent

hoses, elbow fitting or terminal covers from

the battery being replaced.

Breakdown assistance -> Battery for Your Mercedes GLC Class SUV First Generation (2015-2021)

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Breakdown assistance