2023 MERCEDES-BENZ C CLASS Owners Manual

The operating Ouids approved by Mercedes-Benz
can be identiNed 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 Ouids:
= in the Mercedes-Benz SpeciNcations for Oper-
ating Fluids by entering the designation
- At https://operatingOuids.mercedes-
benz.com
= At a qualiNed specialist workshop&WARNING Risk of Nre or explosion from
fuel
Fuels are highly Oammable.
Fire, open Oames, smoking and creating
sparks must be avoided.Before and during refueling, switch oM
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 oM 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 identiNed by the
Ethanol up to E85 sticker on the inside of the fuel
Nller Oap.
Depending on the country, the fuels you can use in your vehicle may diMer from the information in
the Operator\bs Manual. The fuels that have been
approved for your vehicle can be found on the
instruction label on the inside of the fuel Nller Oap.Technical data375

Fuel

qInformation on fuel quality for vehicles with gas-
oline engines
Observe the notes on operating Ouids
(  page 374).
*NOTE Damage caused by the wrong 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 spark-ignition
engine fuel.
This fuel may contain up to 10% ethanol by vol- ume. 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
= Gasoline with additives containing metal
If you have accidentally refueled with the
wrong fuel:Do not switch on the vehicle.Consult a qualiNed specialist workshop.
If the available fuel is not suPciently low in sulfur,
it may produce unpleasant odors.
Only refuel with fuel that has at least the octane number speciNed in the information label in the
fuel Nller Oap ( page 168).
For maximum engine output: Only refuel using
premium-grade gasoline with at least 91 AKI/
95 RON.
If the recommended fuel is not available, you may also temporarily use regular gasoline with anoctane number of at least 87 AKI/91 RON. Thismay reduce engine output and increase fuel con-
sumption.
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 Nll the fuel tank to half full with
unleaded regular gasoline and reNll 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 at the fol- lowing locations:
= At a gas station
= At a qualiNed specialist workshop
= USA only: On the https://www.mbusa.com
376Technical data

qInformation on additives in gasoline (vehicles
with gasoline engine)
Observe the notes on operating Ouids
(  page 374).*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
suPcient additives. Deposits could build up in the
fuel injection system as a result. In this case, in consultation with a 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.

q Tank content and fuel reserve
Total fuel tank capacityModelAll models17.4 gal (66.0 l)
Reserve fuel tank
ModelAll models1.9 gal (7.0 l)
Engine oil

q Notes on engine oil
Observe the notes on operating Ouids
(  page 374).
*NOTE Engine damage caused by an incor-
rect oil Nlter, incorrect oil or additivesDo not use engine oils or oil Nlters other
than those which meet the speciNcations
necessary for the prescribed service
intervals.Do not alter the engine oil or oil Nlter in
order to achieve longer change intervals than prescribed.Do not use additives.Have the engine oil changed aser the
prescribed intervals.Technical data377

Mercedes-Benz recommends having the oil
changed at a qualiNed specialist workshop.
Only use engine oils approved for your vehicle by
Mercedes-Benz.

q Engine oil quality and Nlling capacity
Engine oil speciNcationModelMB-Freigabe or MB-
ApprovalAll models229.71, 229.72 1)1) Recommended for lowest possible fuel consumption (lowest SAE
viscosity class in each case; observe possible restrictions of the
approved SAE viscosity classes)
Use only SAE 0W-20 viscosity class engine oils.
To achieve the lowest possible fuel consumption, it is recommended to use the engine oil speciNca-
tions marked in the table for the lowest SAE vis-
cosity class. While doing so, observe possible
restrictions of the approved SAE viscosity classes.
Engine oil Nlling capacityModelCapacityAll models6.3 US qt (6.0 liters)
The speciNed Nlling capacity refers to an oil
change with the oil Nlter.
Notes on brake Ouid
Observe the notes on operating Ouids
(  page 374).
&WARNING Risk of an accident due to
vapor pockets forming in the brake system
The brake Ouid constantly absorbs moisture
from the air. This lowers the boiling point of
the brake Ouid. 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 eMect to be impaired.
Have the brake Ouid renewed at the
speciNed intervals.Have the brake Ouid regularly replaced at a quali-
Ned specialist workshop.
Only use a brake Ouid approved by Mercedes-
Benz according to MB-Freigabe or MB-Approval 331.0.
Coolant

q Notes on coolant
Observe the notes on operating Ouids
(  page 374).
&WARNING !

*NOTE Damage caused by incorrect cool-
antOnly 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 SpeciNcation for
Operating Fluids 320.1
- At https://operatingOuids.mercedes-
benz.com
= At a qualiNed specialist workshop
*NOTE Overheating at high outside temper-
atures
If an inappropriate coolant is used, the cooling
system is not suPciently protected against
overheating and corrosion at high outside
temperatures.
Only use coolant approved for
Mercedes-Benz.Observe the instructions in the Mercedes-Benz SpeciNcations for Oper-
ating Fluids 320.1.
Have the coolant regularly replaced at a qualiNed
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))

q Coolant Nlling capacity
Coolant
All modelsCapacityEngine cooling circuit
(Nlling capacity with
heating)12.7 US qt
(12.0 liters)Cooling circuit (high-
voltage battery)2.3 US qt (2.2 liters)Notes on windshield washer Ouid
Observe the notes on operating Ouids
(  page 374).
&WARNING !

*NOTE Blocked spray nozzles caused by
mixing windshield washer OuidsDo not mix MB SummerFit and MB Win-
terFit with other windshield washer Ou-
ids.
Do not use distilled or de-ionised water. Other- wise, the Nll level sensor may be triggered errone-
ously.
Recommended windshield washer Ouid:
= 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 Ouid all
year round.
Refrigerant

q Notes on refrigerant
Observe the notes on operating Ouids
(  page 374).
*NOTE Damage due to incorrect refrigerant
If a non-approved refrigerant is used, the cli-
mate control system may be damaged.
USA: use only R!

Information label (example !

Display messages
Introduction

qNotes about display messages
Display messages appear on the driver display.
Display messages with graphical symbols are sim-
pliNed in the Operator\bs Manual and may diMer
from the symbols on the driver display. The driver display shows high-priority display messages in
red. Certain display messages are accompanied by a warning tone.
Please act in accordance with the display mes-
sages and follow the additional notes in the Oper-
ator\bs Manual.
For some display messages, symbols will also be
shown:
=