MERCEDES-BENZ C CLASS COUPE 2023 Owners Manual

*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:
=

Occupant safetyDisplay messagesPossible causes/consequences and P Solutions
u
Restraint System Malfunc-
tion Service Required
*The restraint system is malfunctioning (  page 34).&WARNING Risk of injury due to malfunctions in the restraint system
Components in the restraint system may be activated unintentionally or not deploy as planned in an accident.
Have the restraint system checked and repaired immediately at a qualiNed specialist workshop.
u
Front Left Malfunction
Service Required (example)
*The corresponding restraint system is malfunctioning (  page 34).&WARNING Risk of injury due to malfunctions in the restraint system
Components in the restraint system may be activated unintentionally or not deploy as planned in an accident.
Have the restraint system checked and repaired immediately at a qualiNed specialist workshop.
u
Left Window Airbag Mal-
function Service
Required (example)
*The corresponding restraint system is malfunctioning (  page 34).&WARNING Risk of injury or fatal injury due to a malfunction in the window curtain airbag
The window curtain airbag might be triggered unintentionally or might not be triggered at all in the event of an
accident.
Have the window curtain airbag checked and repaired immediately at a qualiNed specialist workshop.Display messages and warning/indicator lamps383

Display messagesPossible causes/consequences and P SolutionsFront Passenger Airbag Dis-
abled See Operator's Man-
ual*The front passenger airbag has been disabled even though an adult or a person of adult stature is on the front passenger seat. If additional forces are applied to the seat, the weight the system detects may be too low.&WARNING Risk of injury or fatal injury due to a disabled front passenger airbag
If the front passenger airbag is disabled, the front passenger airbag will not be deployed in the event of an accident
and cannot perform its intended protective function.
A person in the front passenger seat could then, for example, come into contact with the vehicle\bs interior, espe-
cially if the person is sitting too close to the cockpit.
Make sure, both before and during the journey, that the status of the front passenger airbag is correct.Stop the vehicle immediately in accordance with the traPc conditions.Make sure that no objects are trapped under the front passenger seat.Check the status of automatic front passenger airbag actuation (  page 44).If necessary, consult a qualiNed specialist workshop immediately.Front Passenger Airbag
Enabled See Operator's
Manual*The front passenger airbag will be enabled while the vehicle is in motion in the following situations:
= Even when a child, a person of smaller stature or an object weighing less than the system weight threshold is loca-
ted on the front passenger seat
= Even when the front passenger seat is not occupied
The system may detect objects or forces that are adding to the weight applied to the seat.384Display messages and warning/indicator lamps

Display messagesPossible causes/consequences and P Solutions&WARNING Risk of injury or death when using a child restraint system while the front passenger airbag is ena-
bled
If you secure a child in a child restraint system on the front passenger seat and the front passenger airbag is ena-
bled, the front passenger airbag can deploy in the event of an accident.
The child could be struck by the airbag.
Ensure, both before and during the journey, that the status of the front passenger airbag is correct.
NEVER use a rearward facing child restraint on a seat protected by an ACTIVE AIRBAG in front of it, DEATH or
SERIOUS INJURY to the CHILD can occur.
Stop the vehicle immediately in accordance with the traPc conditions.Make sure that no objects are trapped under the front passenger seat.Check the status of automatic front passenger airbag actuation (  page 44).If necessary, consult a qualiNed specialist workshop immediately.PRE-SAFE Inoperative See
Operator's Manual*The PRE!

SmartKeyDisplay messagesPossible causes/consequences and P Solutions

Display messagesPossible causes/consequences and P Solutions

Display messagesPossible causes/consequences and P Solutions