Get Technical data -> Operating fluids Guide for Mercedes CLA 4 Door Third Generation (2025-2026)

Plate with information about emissions test-

ing, including conrmation of emissions

guidelines at the U.S. federal level as well as

for California

VIN as a label at the lower edge of the wind-

shield

Operating uids

Notes on operating uids

NOTE Mercedes-AMG vehicles

Observe the notes in the Supplement.

You could otherwise fail to recognize

dangers.

WARNING Risk of injury due to harmful

operating uids

Operating uids can be toxic.

When using, storing and disposing of

operating uids, observe the imprints on

the respective original containers.

Always keep operating uids in the

sealed original container.

Always keep children away from operat-

ing uids.

ENVIRONMENTAL NOTE Pollution of the

environment due to irresponsible disposal

of operating uids

Incorrect disposal of operating uids can

cause considerable damage to the environ-

ment.

Dispose of operating uids in an environ-

mentally responsible manner.

Operating uids include the following:

Fuels

Lubricants

Coolant

Brake uid

Windshield washer uid

Climate control system refrigerant

Only use products approved by Mercedes-Benz.

Damage caused by the use of products that have

not been approved is not covered by the

Mercedes-Benz warranty or goodwill gestures.

The operating uids approved by Mercedes-Benz

can be identied by the following inscriptions on

the container:

MB-Freigabe (e.g. MB-Freigabe 229.51)

MB-Approval (e.g. MB-Approval 229.51)

Further information on approved operating uids:

in the Mercedes-Benz Specications for Oper-

ating Fluids by entering the designation

At a qualied specialist workshop

WARNING Risk of re or explosion from

fuel

Fuels are highly ammable.

Fire, open ames, smoking and creating

sparks must be avoided.

350

Technical data

Before and during refueling, switch o

the vehicle and, if installed, the station-

ary heater.

WARNING Risk of injury from fuels

Fuels are poisonous and hazardous to your

health.

Do not swallow fuel or let it come into

contact with skin, eyes or clothing.

Do not inhale fuel vapor.

Keep children away from fuel.

Keep doors and windows closed during

the refueling process.

If you or other people come into contact with

fuel, observe the following:

Immediately rinse fuel o your skin with

soap and water.

If fuel comes into contact with your eyes,

immediately rinse them thoroughly with

clean water. Seek medical attention

immediately.

If you swallow fuel, seek medical atten-

tion immediately. Do not induce vomit-

ing.

Change immediately out of clothing that

has come into contact with fuel.

Flexible-fuel vehicles can be refueled with the fol-

lowing fuel types:

premium-grade unleaded gasoline

E85 fuel

a mixture of E85 fuel and premium-grade

unleaded gasoline

Flexible-fuel vehicles can be identied by the

Ethanol up to E85 sticker on the inside of the fuel

ller ap.

Depending on the country, the fuels you can use

in your vehicle may dier from the information in

the Operator's Manual. The fuels that have been

approved for your vehicle can be found on the

instruction label on the inside of the fuel ller ap.

Fuel

▌Information on fuel quality for vehicles with gas-

oline engine

Observe the notes on operating uids

(/ page 350).

NOTE Damage caused by incorrect fuel

Even small amounts of the wrong fuel could

result in damage to the fuel system, the

engine and the emission control system.

Only refuel with low-sulfur gasoline.

This fuel may contain up to 10 % ethanol by

volume. Your vehicle is suitable for use with

E10‑fuel.

Never refuel with one of the following fuels:

diesel

gasoline with more than 10 % ethanol by

volume‑, e. g. E15, E85, E100

gasoline with more than 3 % methanol by

volume, e.g. M15, M30, M85, M100

Technical data

351

gasoline with metallic additives

If you have accidentally refueled with the

wrong fuel:

Do not switch on the vehicle.

Consult a qualied specialist workshop.

If the available fuel is not suciently low in sulfur,

it may produce unpleasant odors.

Refuel only with fuel that has at least the octane

number specied on the information label on the

fuel ller ap. Otherwise, engine output may be

reduced and fuel consumption increased.

For maximum engine output: refuel only with pre-

mium-grade unleaded gasoline with an octane

number of at least 91 AKI/95 RON.

If the recommended fuel is not available, you may

also temporarily use regular unleaded gasoline

with an octane number of at least 87 AKI/

91 RON. This may reduce engine output and

increase fuel consumption.

Never refuel using gasoline with an even lower

RON.

NOTE Premature engine wear through

unleaded regular gasoline

Impairment of the longevity and performance

of the engine.

If unleaded premium grade gasoline is unavail-

able and you have to refuel using unleaded

regular gasoline:

Only ll the fuel tank to half full with

unleaded regular gasoline and rell as

soon as possible with unleaded premium

grade gasoline.

Do not drive at the maximum design

speed.

Avoid sudden acceleration and engine

speeds over 3000 rpm.

Further information on fuel is available in the fol-

lowing locations:

at a gas station

at a qualied specialist workshop

USA only: On the .

▌Information on additives in gasoline (vehicles

with gasoline engine)

Observe the notes on operating uids

(/ page 350).

NOTE Damage from use of unsuitable

additives

Even small amounts of the wrong additive may

lead to malfunctions occurring.

Only add cleaning additives recommen-

ded by Mercedes-Benz to the fuel.

Mercedes-Benz recommends that you use brand-

name fuels with additives.

In some countries, the fuel available may not have

sucient additives. Deposits could build up in the

fuel injection system as a result. In this case, in

consultation with a qualied specialist workshop

(e.g. an authorized Mercedes-Benz Service Cen-

ter), mix the fuel with the cleaning additive recom-

mended by Mercedes-Benz. Observe the notes

and mixing ratios indicated on the tank.

352

Technical data

▌Tank content and fuel reserve

Total fuel tank capacity

Model

All models 13.5 gal (51.0 liters)

Fuel tank reserve

Model

All models 1.3 gal (5.0 liters)

Engine oil

▌Notes on engine oil

Observe the notes on operating uids

(/ page 350).

NOTE Engine damage caused by an incor-

rect oil lter, incorrect oil or additives

Do not use engine oils or oil lters other

than those which meet the specications

necessary for the prescribed service

intervals.

Do not alter the engine oil or oil lter in

order to achieve longer change intervals

than prescribed.

Do not use additives.

Have the engine oil changed aer the

prescribed intervals.

Mercedes-Benz recommends having the oil

changed at a qualied specialist workshop.

Only use engine oils approved for your vehicle by

Mercedes-Benz.

▌Engine oil quality and lling capacity

Engine oil specication

Model MB-Freigabe or MB-

Approval

All models

229.71, 229.72

1) Recommended for the lowest possible fuel consumption (lowest SAE

viscosity class in each case; observe possible restrictions of the

approved SAE viscosity classes).

To achieve the lowest possible fuel consumption,

it is recommended to use the engine oil specica-

tions marked in the table with the lowest SAE vis-

cosity class. Observe any possible restrictions of

the approved SAE viscosity classes.

Technical data

353

Engine oil lling capacity

Model Capacity

All models 5.3 US qt (5.0 liters)

The specied lling capacity refers to an oil

change with the oil lter.

Notes on brake uid

Observe the notes on operating uids

(/ page 350).

WARNING Risk of an accident due to

vapor pockets forming in the brake system

The brake uid constantly absorbs moisture

from the air. This lowers the boiling point of

the brake uid. If the boiling point is too low,

vapor pockets may form in the brake system

when the brakes are applied hard.

This causes the braking eect to be impaired.

Have the brake uid renewed at the

specied intervals.

Have the brake uid regularly replaced at a quali-

ed specialist workshop.

Only use a brake uid approved by Mercedes-

Benz according to MB-Freigabe or MB-Approval

331.0.

Coolant

▌Notes on coolant

Observe the notes on operating uids

(/ page 350).

WARNING ‑ Risk of re and injury from

antifreeze

If antifreeze comes into contact with hot com-

ponent parts in the engine compartment, it

may ignite.

Allow the engine to cool down before

adding antifreeze.

Make sure that no antifreeze spills out

next to the ller opening.

Thoroughly clean o any antifreeze from

component parts before starting the

vehicle.

NOTE Damage caused by incorrect cool-

ant

Only use coolant that has been premixed

with the required antifreeze protection.

Information on coolant is available at the fol-

lowing locations:

In the Mercedes-Benz Specication for

Operating Fluids 320.1

At a qualied specialist workshop

NOTE Overheating at high outside temper-

atures

If an inappropriate coolant is used, the cooling

system is not suciently protected against

overheating and corrosion at high outside

temperatures.

Only use coolant approved for

Mercedes-Benz.

354

Technical data

Observe the instructions in the

Mercedes-Benz Specications for Oper-

ating Fluids 320.1.

Have the coolant regularly replaced at a qualied

specialist workshop.

Proportion of antifreeze concentrate in the cool-

ing system:

A minimum of 50% (antifreeze protection down

to about -35°F (-37°C))

A maximum of 55% (antifreeze protection

down to -49°F (-45°C))

▌Coolant lling capacity

Coolant (engine)

Model Capacity

All models 13.6 US qt

(12.9 liters)

Notes on windshield washer uid

Observe the notes on operating uids

(/ page 350).

WARNING ‑ Risk of re and injury from

windshield washer concentrate

Windshield washer concentrate is highly am-

mable. It could ignite if it comes into contact

with hot engine component parts or the

exhaust system.

Make sure that no windshield washer

concentrate spills out next to the ller

opening.

NOTE Damage to the exterior lighting due

to unsuitable windshield washer uid

Unsuitable windshield washer uid may dam-

age the plastic surface of the exterior lighting.

Only use windshield washer uid which is

also suitable for use on plastic surfaces,

e.g. MB SummerFit or MB WinterFit.

NOTE Blocked spray nozzles caused by

mixing windshield washer uids

Do not mix MB SummerFit and MB Win-

terFit with other windshield washer u-

ids.

Do not use distilled or de-ionised water. Other-

wise, the ll level sensor may be triggered errone-

ously.

Recommended windshield washer uid:

Above freezing point: e.g. MB SummerFit

Below freezing point: e.g. MB WinterFit

For the correct mixing ratio, refer to the informa-

tion on the antifreeze container.

Mix washing water with windshield washer uid all

year round.

Refrigerant

▌Notes on refrigerant

Observe the notes on operating uids

(/ page 350).

Technical data

355

NOTE Damage due to incorrect refrigerant

If a non-approved refrigerant is used, the cli-

mate control system may be damaged.

Use only R‑1234yf refrigerant.

NOTE Damage to the climate control sys-

tem due to incorrect refrigerant compres-

sor oil

Only use refrigerant compressor oil that

has been approved by Mercedes-Benz.

Do not mix the approved refrigerant

compressor oil with a dierent refriger-

ant compressor oil.

Work on the climate control system may be car-

ried out only at a qualied specialist workshop. All

applicable regulations as well as SAE standard

J639 must be adhered to.

The information label for the climate control sys-

tem regarding the refrigerant type and the refrig-

erant compressor oil (PAG oil) is located on the

inside of the hood.

Information label

Hazard and service warning symbols

Refrigerant lling capacity

Applicable standards

PAG oil part number

GWP (global warming potential) of the refriger-

ant used

Refrigerant type

Symbols

1 indicate the following:

Possible dangers

Have maintenance work carried out at a quali-

ed specialist workshop

▌Filling quantity for refrigerant and PAG oil

Refrigerant lling quantity

Model

All models 18.7 ± 0.4 oz

(530 ± 10 g)

Filling quantity for PAG oil

Model

All models 2.8 ± 0.4 oz

(80 ± 10 g)

Vehicle data

Vehicle dimensions

The heights specied may vary as a result of the

following factors:

Tires

Load

Condition of the suspension

Optional equipment

356

Technical data

Technical data -> Operating fluids for Your Mercedes CLA 4 Door Third Generation (2025-2026)

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