Get Breakdown assistance Guide for Mercedes CLA 4 Door Third Generation (2025-2026)

Emergency

Removing the safety vest

There is a safety vest compartment in the stow-

age compartments of all doors for storing a safety

vest.

To remove: pull out safety vest bag 1 by loop

Open safety vest bag 1 and pull out the

safety vest.

To stow: fold the reective safety jacket, roll it

up and stow it in safety jacket bag 1.

Slide safety jacket bag 1 along the lower

edge of the armrest into the safety jacket

compartment. Meanwhile, ensure that loop

2 hangs out well within reach.

Remove a new reective safety jacket from its

packaging material before sliding it into the

safety jacket compartment. The packaging

material may otherwise cause it to slip out or

make removing it dicult.

Observe the legal requirements in each coun-

try.

Maximum number of washes

Maximum wash temperature

Do not bleach

Do not iron

Do not tumble dry

Do not dry clean

Class 2 safety vest

The requirements dened by the legal standard

are only fullled if the safety vest is the correct

size and is fully closed.

Replace the safety vest in the following cases:

The reective strips are damaged or dirty

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291

The maximum permissible number of washes

is exceeded

The uorescence has faded, e.g. due to con-

tinuous exposure to sunlight.

Dispose of the safety vest in an environmentally

responsible manner:

To do so, contact your local waste disposal

company.

Warning triangle

▌Removing the warning triangle

Push both sides of warning triangle holder 1

in the direction of the arrow and open it.

Remove warning triangle 2.

▌Setting up the warning triangle

Fold side reectors 1 upwards to form a tri-

angle and attach at the top using upper press-

stud

Fold legs 3 down and out to the side.

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Breakdown assistance

First-aid kit (so-sided) overview

Depending on the vehicle version, rst-aid kit

(so-sided) 1 is located in the stowage net on

the le-hand side of the trunk or under the trunk

oor.

Flat tire

Notes on at tires

WARNING Risk of accident due to a at

tire

A at tire severely aects the driving charac-

teristics as well as steering and braking.

Tires without run-at characteristics:

Do not drive on with a at tire.

Change the at tire immediately with an

emergency spare wheel or spare wheel.

Alternatively, consult a qualied special-

ist workshop.

Tires with run-at characteristics:

Observe the information and warning

notes on MOExtended tires (run-at

tires).

In the event of a at tire, you have the following

options depending on your vehicle's equipment:

Vehicles with MOExtended tires: it is possible

to continue your journey for a short period of

time. Make sure you observe the notes on

MOExtended tires (run-at tires)

(/ page 294).

Vehicles with a TIREFIT kit: you can seal the

tire so that it is possible to continue your jour-

ney for a short period of time. To do this, use

the TIREFIT kit (/ page 295).

Vehicles with Mercedes me connect: you can

make a call for breakdown assistance via the

overhead control panel in the case of a break-

down (/ page 255).

All vehicles: change the wheel (/ page 338).

The emergency spare wheel is available only

in certain countries (/ page 343).

Vehicles equipped with MOExtended tires are

not equipped with a TIREFIT kit at the factory.

It is therefore recommended that you addi-

tionally equip your vehicle with a TIREFIT kit if

you mount tires on your vehicle that do not

feature run-at characteristics, e.g. winter

tires. A TIREFIT kit may be obtained from a

qualied specialist workshop.

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293

Vehicles with a Mercedes-Benz emergency

call system that are not equipped with a

TIREFIT kit: in the event of a at tire, contact

the Customer Assistance Center for the

Mercedes-Benz emergency call system .

Notes on MOExtended tires (run-at tires)

WARNING Risk of accident when driving in

limp-home mode

When driving in emergency mode the handling

characteristics are impaired.

Do not exceed the specied maximum

speed of the MOExtended tires.

Avoid any abrupt steering and driving

maneuvers as well as driving over obsta-

cles (curbs, pot holes, o-road). This

applies, in particular, to a loaded vehicle.

Stop driving in the emergency mode if

you notice:

Banging noise

Vehicle vibration

Smoke which smells like rubber

Continuous ESP

intervention

Cracks in the tire side walls

Aer driving in emergency mode, have

the rims checked by a qualied specialist

workshop with regard to their further

use.

The defective tire must be replaced in

every case.

With MOExtended tires (run-at tires), you can

continue to drive your vehicle even if there is a

total loss of pressure in one or more tires. How-

ever, the tire aected must not show any clearly

visible damage.

You can recognize MOExtended tires by the

MOExtended marking which appears on the side

wall of the tire.

Vehicles with tire pressure loss warning system:

MOExtended tires may only be used in conjunc-

tion with an activated tire pressure loss warning

system.

Vehicles with tire pressure monitoring system:

MOExtended tires may only be used in conjunc-

tion with an activated tire pressure monitoring

system.

If a pressure loss warning message appears in the

driver's display, proceed as follows:

Check the tire for damage.

If driving on, observe the following notes.

Driving distance possible in emergency mode

aer the pressure loss warning:

Load condition Driving distance possi-

ble in emergency mode

Partially laden 50 miles (80 km)

Fully laden 19 miles (30 km)

The driving distance possible in emergency mode

may vary depending on the driving style. Observe

the maximum permissible speed of 50 mph

(80 km/h).

294

Breakdown assistance

If a tire has gone at and cannot be replaced with

an MOExtended tire, you can use a standard tire

as a temporary measure.

TIREFIT kit storage location

The TIREFIT kit is located under the trunk oor.

Tire sealant bottle

Tire ination compressor

Depending on the vehicle version, the TIREFIT kit

may also be located in other positions under the

trunk oor.

Using the TIREFIT kit

Requirements

Tire sealant bottle and tire inator compressor

are ready for use (/ page 295).

TIREFIT sticker is present.

Gloves are present.

You can use TIREFIT tire sealant to seal perfora-

tion damage of up to 0.16 in (4 mm), particularly

those in the tire tread. You can use TIREFIT in out-

side temperatures down to -4 °F (-20 °C).

WARNING Risk of accident when using

tire sealant

The tire sealant may be unable to seal the tire

properly, especially in the following cases:

There are large cuts or punctures in the

tire (larger than damage previously men-

tioned)

The wheel rims have been damaged

Aer journeys with very low tire pressure

or with at tires

Do not continue driving.

Consult a qualied specialist workshop.

WARNING Risk of injury and poisoning

from tire sealant

The tire sealant is harmful and causes irrita-

tion. Do not allow it to come into contact with

the skin, eyes or clothing, and do not swallow

it. Do not inhale tire sealant fumes. Keep the

tire sealant away from children.

If you come into contact with the tire sealant,

observe the following:

Rinse o the tire sealant from your skin

immediately using water.

If tire sealant gets into your eyes, thor-

oughly rinse out the eyes using clean

water.

If tire sealant has been swallowed, imme-

diately rinse out the mouth thoroughly

and drink plenty of water. Do not induce

vomiting and seek medical attention

immediately.

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295

Change out of any clothes contaminated

with tire sealant immediately.

If allergic reactions occur, seek medical

attention immediately.

NOTE Overheating due to the tire ination

compressor running too long

Do not run the tire ination compressor

for longer than ten minutes without inter-

ruption.

Comply with the manufacturer's safety notes on

the sticker on the tire ination compressor.

Have the tire sealant bottle replaced in a qualied

specialist workshop every ve years.

Do not remove any foreign objects that have

entered the tire.

Ax part 1 of the TIREFIT sticker to the

instrument cluster within the driver's eld of

vision.

Ax part 2 of the TIREFIT sticker near the

valve on the wheel with the defective tire.

Pull plug 4 with the cable and hose 5 out

of the tire ination compressor housing.

Push the plug of hose 5 into ange 6 of tire

sealant bottle

1 until the plug engages.

Place tire sealant bottle 1 head downwards

into recess

2 of the tire ination compressor.

296

Breakdown assistance

Remove the valve cap from valve 7 on the

faulty tire.

Screw lling hose 8 onto valve 7.

Insert plug 4 into a 12‑V‑socket in your vehi-

cle.

Switch on the vehicle.

Switch on the tire ination compressor using

On/O switch 3.

The tire is inated. First, tire sealant is pum-

ped into the tire. The pressure may briey rise

to approximately 500 kPa (5.0 bar/73 psi).

Do not switch o the tire ination compressor

during this phase!

Let the tire ination compressor run for a max-

imum of ten minutes.

The tire should then have attained a tire pres-

sure of at least 200 kPa (2.0 bar/29 psi).

If tire sealant leaks out, make sure you clean the

aected area as quickly as possible. It is prefera-

ble to use clean water.

If you get tire sealant on your clothing, have it

cleaned as soon as possible with perchloroethy-

lene.

If, aer ten minutes, a tire pressure of 200 kPa

(2.0 bar/29 psi) has not been attained:

Switch o the tire ination compressor.

Unscrew the lling hose from the valve of the

defective tire.

Please note that tire sealant may leak out when

unscrewing the lling hose.

Drive forwards or in reverse very slowly for

approximately 33  (10 m).

Pump up the tire again.

Aer a maximum of ten minutes the tire pres-

sure must be at least 200 kPa (2.0 bar/

29 psi).

WARNING Risk of accident due to the

specied tire pressure not being achieved

If the specied tire pressure is not achieved

aer the specied time, the tire is too badly

damaged. The tire sealant cannot repair the

tire in this instance.

The braking characteristics as well as the driv-

ing characteristics may be greatly impaired.

Do not continue driving.

Consult a qualied specialist workshop.

If, aer ten minutes, a tire pressure of 200 kPa

(2.0 bar/29 psi) has been attained:

Switch o the tire ination compressor.

Unscrew the lling hose from the valve of the

defective tire.

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297

WARNING Risk of accident from driving

with sealed tires

A tire temporarily sealed with tire sealant

impairs the handling characteristics and is not

suitable for higher speeds.

Adapt your driving style accordingly and

drive carefully.

Do not exceed the maximum speed limit

with a tire that has been repaired using

tire sealant.

Observe the maximum permissible speed of

50 mph (80 km/h) for a tire sealed with tire

sealant.

NOTE Staining caused by leaking tire seal-

ant

Aer use, excess tire sealant may leak out

from the lling hose.

Therefore, place the lling hose in the

plastic bag that contained the TIREFIT

kit.

ENVIRONMENTAL NOTE Environmental

pollution caused by environmentally irre-

sponsible disposal

Tire sealant contains pollutants.

Have the tire sealant bottle disposed of

professionally, e.g. at an authorized

Mercedes-Benz Center.

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

tion compressor.

Pull away immediately.

Stop driving aer approximately ten minutes

and check the tire pressure using the tire

ination compressor.

The tire pressure must now be at least

130 kPa (1.3 bar/19 psi).

WARNING Risk of accident due to the

specied tire pressure not being attained

If the specied tire pressure is not reached,

the tire is too badly damaged. The tire sealant

cannot repair the tire in this instance.

The braking and driving characteristics may be

greatly impaired.

Do not continue driving.

Consult a qualied specialist workshop.

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).

To increase the tire pressure: switch on the

tire ination compressor.

To reduce the tire pressure: press pressure

release button 1 next to manometer 2.

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Breakdown assistance

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.

Battery (vehicle)

Notes on the 12 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 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 169)

Further information on ESP

(/ page 170)

For safety reasons, Mercedes-Benz recommends

that you only use batteries which have been

approved for your vehicle by Mercedes-Benz.

All vehicles except vehicles with a lithium-ion bat-

tery

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.

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.

Breakdown assistance

299

Keep children away from the battery.

Immediately rinse battery acid o thor-

oughly with plenty of clean water and

seek medical attention immediately.

All vehicles

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 if the 12 V battery is

used improperly.

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.

Do not place heavy objects on the surface

of the battery or use the battery to sup-

port a person in any way.

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:

If available: activate standby mode

(/ page 167, 166).

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.

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-

300

Breakdown assistance

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 169)

Further information on ESP

(/ page 170)

ENVIRONMENTAL NOTE Environmental

damage due to improper disposal of bat-

teries

Batteries contain pollutants. It is illegal

to dispose of them with the household trash.

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.

Have any work on the 48 V battery carried out

exclusively at a qualied specialist workshop.

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.

Breakdown assistance

301

Observe this Operator'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 167, 166).

Notes on starting assistance and charging the 12

V battery

All vehicles

When charging the battery and during starting

assistance, always use the jump-start connection

point in the engine compartment.

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 igniting

hydrogen gas

If you cause a short circuit or sparks occur,

the hydrogen gas may ignite when a battery is

charging.

Ensure 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.

When jump starting, take care to con-

nect only battery terminals of identical

polarity.

When jump starting, always observe the

sequence described for connecting and

disconnecting the jumper cables.

Do not connect or disconnect the bat-

tery terminals when the engine is run-

ning.

WARNING 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.

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, at low temperatures, the indicator lamps/warn-

ing lamps in the instrument cluster do not light

up, it is highly likely that the discharged battery

302

Breakdown assistance

has frozen. In this case, you may neither charge

the battery nor jump-start the vehicle.

The service life of a battery that has been thawed

may be drastically reduced. The starting charac-

teristics can be impaired, particularly at low tem-

peratures.

We recommend having the thawed-out battery

inspected at a qualied specialist workshop.

All vehicles

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 when charging the battery:

Use only undamaged jumper cables / charg-

ing 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 cables / charging cables must not

come into contact with any parts that 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 a battery.

Also observe the following points when charging

the battery:

Use only chargers tested and approved for

Mercedes-Benz.

Read the operating instructions for the

charger before charging the battery.

Also observe the 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 each other.

Vehicles with a gasoline engine: only jump-

start your vehicle when the engine and

exhaust system are cold.

Starting assistance and charging the 12 V battery

Preparing for starting assistance / the charging

process

Secure the vehicle by applying the electric

parking brake.

Shi the transmission to position j.

Switch o the vehicle and all electrical con-

sumers.

Open the hood.

Breakdown assistance

303

Slide cover 1 of positive contact 2 on the

jump-start connection point in the direction of

the arrow.

Starting assistance

Connect the positive contact of your vehicle to

the jumper cable.

Connect the positive terminal of the donor

battery to the jumper cable.

Start the engine of the donor vehicle and run

it at idling speed.

Connect the negative terminal of the donor

battery to the jumper cable.

Connect ground point 3 of your vehicle to

the jumper cable.

Start the engine of your own vehicle.

Let the engines run for several minutes.

Before disconnecting the jumper cables,

switch on an electrical consumer in your own

vehicle (e.g. the rear window defroster or the

lighting).

When the starting assistance procedure is com-

plete:

Disconnect the jumper cable from ground

point 3 of your vehicle.

Disconnect the jumper cable from the nega-

tive terminal of the donor battery.

Disconnect the jumper cable from the positive

contact of your vehicle.

Disconnect the jumper cable from the positive

terminal of the donor battery.

Close cover 1 of positive contact 2 aer

removing the jumper cables.

Further information can be obtained at a qualied

specialist workshop.

Charging the 12 V battery

Connect the positive contact of your vehicle to

the charging cable.

Connect the positive terminal of the charger

to the charging cable.

Connect the negative terminal of the charger

to the charging cable.

Connect ground point 3 of your vehicle to

the charging cable.

Start the charging process.

When the charging process is complete:

Disconnect the charging cable from ground

point 3 of your vehicle.

Disconnect the charging cable from the nega-

tive terminal of the charger.

Disconnect the charging cable from positive

contact of your vehicle.

304

Breakdown assistance

Disconnect the charging cable from the posi-

tive terminal of the charger.

Aer removing the charging cable, close cover

1 of positive contact 2.

Replacing the 12 V battery

Observe the notes on the 12 V battery

(/ page 299).

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

that meets the specic vehicle requirements.

The vehicle is equipped with an AGM (Absorb-

ent Glass Mat) technology battery or a lithium-

ion battery. Full vehicle functionality is guaran-

teed only with an AGM or lithium-ion battery.

For safety reasons, Mercedes-Benz recom-

mends that you use only batteries that have

been tested and approved for your vehicle by

Mercedes-Benz.

Use detachable parts such as vent hoses,

elbow ttings or terminal covers from the bat-

tery to be 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.

Tow starting or towing away

Overview of permitted towing methods (not plug-

in hybrid)

NOTE Damage from automatic braking

If one of the following functions is activated,

the vehicle will brake automatically in certain

situations:

Active Brake Assist

Active Distance Assist DISTRONIC

HOLD function

Active Parking Assist

To avoid damage to the vehicle, switch o

these systems, e.g. when towing or using a car

wash.

Mercedes-Benz recommends transporting your

vehicle in the case of a breakdown, rather than

towing it away.

For towing with both axles on the ground, use a

tow rope or tow rod. Do not use tow bar systems.

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305

WARNING 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.

NOTE Damage to the vehicle due to tow-

ing away incorrectly

Observe the instructions and notes on

towing away.

Permitted towing methods

Vehicle equipment/towing method

Both axles on the ground Front axle raised Rear axle raised

Vehicles with automatic transmis-

sion

Yes, for a maximum of 31 miles

(50 km) at 31 mph (50 km/h)

Yes, for a maximum of 31 miles

(50 km) at 31 mph (50 km/h)

Yes, for a maximum of 31 miles

(50 km) at 31 mph (50 km/h)

4MATIC vehicles Yes, for a maximum of 31 miles

(50 km) at 31 mph (50 km/h)

No No

Towing with a raised axle: towing should be per-

formed by a towing company.

Towing the vehicle with both axles on the ground

Observe the notes on the permitted towing

methods.

Make sure that the battery is connected and

charged.

306

Breakdown assistance

Observe the following points when the battery is

discharged:

the vehicle cannot be started.

the electric parking brake cannot be released

or applied

Vehicles with automatic transmission: the

transmission cannot be shied to position i

or j.

Vehicles with automatic transmission: if the

transmission cannot be shied to position i

or if the display does not show anything,

transport the vehicle (/ page 308). A towing

vehicle with liing equipment is required for

vehicle transportation.

NOTE Damage due to towing away at

excessively high speeds or over long dis-

tances

The drivetrain could be damaged when towing

at excessively high speeds or over long distan-

ces.

A towing speed of 30 mph (50 km/h)

must not be exceeded.

A towing distance of 30 miles (50 km)

must not be exceeded.

WARNING Risk of accident when towing a

vehicle which is too heavy

If the vehicle to be tow-started or towed away

is heavier than the permissible gross mass of

your vehicle, the following situations can

occur:

The towing eye may become detached.

The vehicle/trailer combination may

swerve or rollover.

Before tow-starting or towing away,

check if the vehicle to be tow-started or

towed away exceeds the permissible

gross mass.

If a vehicle has to be tow-started or towed away,

its permissible gross mass must not exceed the

permissible gross mass of the towing vehicle.

Information on the permissible gross mass of

the vehicle can be found on the vehicle identi-

cation plate (/ page 348).

Vehicles with automatic transmission: do not

open the driver's door or front passenger

door; the transmission otherwise automati-

cally shis to position j.

Install the towing eye (/ page 309).

Fasten the towing device.

NOTE Damage due to incorrect connec-

tion of the tow bar

Only connect the tow rope or tow bar to

the towing eyes.

Deactivate the automatic locking mechanism

(/ page 76).

Do not activate the HOLD function.

Deactivate the tow-away alarm (/ page 90).

Deactivate Active Brake Assist (/ page 192).

Vehicles with automatic transmission: shi to

position i.

Release the electric parking brake.

Breakdown assistance

307

WARNING Risk of accident due to limited

safety-related functions during the towing

process

Safety-related functions are limited or no lon-

ger available in the following situations:

The vehicle is switched o.

The brake system or power steering sys-

tem is malfunctioning.

The energy supply or the on-board electri-

cal system is malfunctioning.

When your vehicle is towed away, signicantly

more eort may be required to steer and

brake than is normally required.

Use a tow bar.

Make sure that the steering wheel can

move freely before towing the vehicle

away.

NOTE Damage due to excessive tractive

power

If you pull away sharply, the tractive power

may be too high and the vehicles could be

damaged.

Pull away slowly and smoothly.

Loading the vehicle for transport

Observe the notes on towing away

(/ page 306).

Connect the towing device to the towing eye

in order to load the vehicle.

Vehicles with automatic transmission: shi the

automatic transmission to position i.

Vehicles with automatic transmission: the

automatic transmission may be locked in posi-

tion j in the event of damage to the electri-

cal system. To shi to i, provide the on-

board electrical system with power

(/ page 303).

Load the vehicle onto the transporter.

Vehicles with automatic transmission: shi the

automatic transmission to position j.

Use the electric parking brake to secure the

vehicle against rolling away.

Only secure the vehicle by the wheels.

Vehicles with adaptive damping adjustment

WARNING Risk of an accident when trans-

porting vehicles with adaptive damping

adjustment

When transporting vehicles with adaptive

damping adjustment, the vehicle/trailer com-

bination may begin to rock and start to skid.

Load the vehicle correctly onto the

transporter.

Secure the vehicle on all four wheels

with suitable tensioning straps.

308

Breakdown assistance

NOTE Damage to the vehicle from secur-

ing it incorrectly

Aer loading, the vehicle must be

secured on all four wheels. Otherwise,

the vehicle could be damaged.

A minimum distance of 8 in (20 cm)

upwards and 4 in (10 cm) downwards

must be kept to the transport platform.

Secure the vehicle at all four wheels aer

4MATIC vehicles/vehicles with automatic trans-

mission

Make sure that the front and rear axles come

to rest on the same transportation vehicle.

NOTE Damage to the drive train due to

incorrect positioning of the vehicle

Do not position the vehicle above the

connection point of the transport vehi-

cle.

Towing eye storage location

The towing eye is located under the trunk oor.

Depending on the vehicle version, the towing

eye may be located in a dierent position in

the trunk.

Installing and removing the towing eye

Press the mark on cover 1 inwards and

remove.

Screw in the towing eye clockwise as far as it

will go and tighten.

Aer removing the towing eye, engage cover

1 in the bumper.

Breakdown assistance

309

NOTE Damage to the vehicle due to incor-

rect use of the towing eye or trailer hitch

When a towing eye or trailer hitch is used to

recover a vehicle, the vehicle may be damaged

in the process.

Only use the towing eye or trailer hitch to

tow away or tow start the vehicle.

Do not use the towing eye or trailer hitch

to tow the vehicle during recovery.

Tow-starting the vehicle

Vehicles with automatic transmission

NOTE Damage to the automatic transmis-

sion due to tow starting

The automatic transmission may be damaged

in the process of tow starting vehicles with

automatic transmission.

Vehicles with automatic transmission

must not be tow started.

Vehicles with automatic transmissions must

not be tow-started.

Electrical fuses

Notes on electrical fuses

WARNING Risk of accident and injury due

to overloaded lines

If you manipulate or bridge a faulty fuse or if

you replace it with a fuse with a higher amper-

age, the electric line could be overloaded.

This could result in a re.

Always replace faulty fuses with speci-

ed new fuses containing the correct

amperage.

NOTE Damage due to incorrect fuses

Using incorrect fuses can result in damage to

electrical components or systems or their

functions being considerably restricted.

Use only fuses approved for Mercedes-

Benz with the respective specied fuse

rating.

Blown fuses must be replaced with fuses of the

same rating, which you can recognize by the color

and the label. The fuse ratings and further infor-

mation to be observed can be found in the fuse

assignment diagram.

Fuse assignment diagram: on the fuse box in the

engine compartment (/ page 311).

NOTE Damage or malfunctions caused by

moisture

Moisture may cause damage to the electrical

system or cause it to malfunction.

When the fuse box is open, make sure

that no moisture can enter the fuse box.

When closing the fuse box, make sure

that the seal of the lid is positioned cor-

rectly on the fuse box.

310

Breakdown assistance

If the newly inserted fuse also blows, have the

cause traced and rectied at a qualied specialist

workshop.

Ensure the following before replacing a fuse:

The vehicle is secured against rolling away.

All electrical consumers are switched o.

The vehicle is switched o.

The fuses are located in various fuse boxes:

Fuse box in the engine compartment on the

le-hand side of the vehicle, when viewed in

the direction of travel (/ page 311)

Fuse box in the front-passenger footwell

(/ page 312)

Fuse box in the center of the trunk

(/ page 313)

Opening and closing the fuse box in the engine

compartment

Requirements:

A dry cloth and a screwdriver are available.

Observe the notes on electrical fuses

(/ page 310).

Opening

WARNING Risk of injury from using the

windshield wipers when the hood is open

If the windshield wipers start moving when the

hood is open, you could be trapped by the

wiper linkage.

Always switch o the windshield wipers

and vehicle before opening the hood.

Open the hood.

Remove any existing moisture from the fuse

box using a dry cloth.

Loosen screws 1.

Press clips 2 and li the fuse box lid up and

out.

The fuse assignment diagram is in a recess on the

side of the fuse box.

Breakdown assistance

311

Closing

Check whether the seal is positioned correctly

in the lid.

Place the lid on the fuse box.

Make sure that clips 2 engage.

Tighten screws 1.

Close the hood.

Opening and closing the fuse box in the front

passenger footwell

Requirements

Observe the notes on electrical fuses

(/ page 310).

Opening

Li carpet 1 in the direction of the arrow.

Loosen screws 2 and remove fuse box lid

from the top.

Closing

Place the lid on the fuse box.

Tighten screws 2.

Fold back the carpet.

312

Breakdown assistance

Opening and closing the fuse box in the trunk

Requirements

Observe the notes on electrical fuses

(/ page 310).

Open the trunk oor .

Fuse box 1 is located in the center underneath

the trunk oor.

Breakdown assistance

313

Breakdown assistance for Your Mercedes CLA 4 Door Third Generation (2025-2026)

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