Display messagesPossible causes/consequences and M SolutionsFront
Passenger
Airbag
Disabled
See
Operator’s
ManualUSA only:
The front passenger front air bag is deactivated while driving
even though an adult or someone larger than a small
individual is occupying the front passenger seat. Forces
acting on the seat may make the system sense a decrease in
weight.XStop the vehicle in a safe location as soon as possible.XEngage the parking brake.XSwitch off the ignition.XHave the front passenger vacate the seat and exit the
vehicle.XKeep the seat unoccupied, close the front passenger door
and switch on the ignition.
Monitor the 45 indicator lamp in the center console
( Y page 45) and the multifunction display in the instrument
cluster ( Y page 28) for the following:
With the seat unoccupied and the ignition switched on,
R the 45 indicator lamp in the center console should
illuminate and remain illuminated, indicating that the OCS
( Y page 42) has deactivated the front passenger front air
bag.
R the message Front Passenger Airbag Enabled See
Operator’s Manual or the message Front Passenger
Airbag Disabled See Operator’s Manual should not
appear in the multifunction display at any time the seat is
unoccupied. Wait at least 60 seconds for the system to
complete the necessary check cycles and to make sure
neither message appears in the multifunction display.
If above conditions are met, you can occupy the front
passenger seat again. Depending on the front passenger
classification sensed by the OCS, the 45 indicator
lamp will remain illuminated or go out.
If above conditions are not met, the system is not working
properly. Have the system checked at an authorized
Mercedes-Benz Center as soon as possible.
274Vehicle status messages in the multifunction displayPractical hints
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Display messagesPossible causes/consequences and M SolutionsCheck
Child
Seat
PositionSee
Operator's
ManualVehicles with BabySmart™ (Canada only):
The BabySmart™ child seat is not positioned correctly.
Risk of injury!XInstall the BabySmart™ child seat in correct position.Vehicles with BabySmart™ (Canada only):
The sensor for child seat recognition is malfunctioning.
Risk of injury!XContact an authorized Mercedes-Benz Center.GWarning!
If the 45 indicator lamp remains illuminated with an adult occupant on the front passenger
seat even after performing the above corrective steps, do not have any passenger use the front
passenger seat until the system has been repaired.
Driving systems
Display messagesPossible causes/consequences and M SolutionsCruise
ControlInoperativ
eThe cruise control is malfunctioning.
In addition an acoustic warning sounds.XHave the cruise control checked at an authorized
Mercedes-Benz Center.Cruise
Control- - - mphOne of the activation conditions for cruise control has not
been fulfilled. You may have attempted to set a speed below
20 mph (30 km/h).XDrive faster than 20 mph (30 km/h) if the situation allows
and set the speed.XCheck the activation conditions for cruise control
( Y page 181).Vehicle status messages in the multifunction display275Practical hints204_AKB; 5; 23, en-USd2ureepe,Version: 2.11.8.12009-07-16T17:54:06+02:00 - Seite 275Z
iAfter 60 seconds with an unfastened seat belt the warning chime stops sounding and the
seat belt telltale illuminates continuously. The seat belt telltale will only go out if both, the
driver and front passenger’s seat belt are fastened, or the vehicle is standing still and a front
door is opened.ProblemPossible causes/consequences and M Solutions6The red SRS
indicator lamp
comes on while
driving.There is a malfunction in the restraint systems. The air bags or
Emergency Tensioning Devices (ETDs) could deploy unexpectedly
or fail to activate in an accident.XDrive with added caution to the nearest authorized Mercedes-
Benz Center.GWarning!
In the event a malfunction of the SRS is
indicated as outlined above, the SRS may not
be operational.
For your safety, we strongly recommend that
you contact an authorized Mercedes-Benz
Center immediately to have the system
checked. Otherwise the SRS may not be
activated when needed in an accident, which
could result in serious or fatal injury, or it
might deploy unexpectedly and unnecessarily
which could also result in injury.ProblemPossible causes/consequences and M SolutionsdAll models,
except
C 63 AMG:
The yellow ESP ®
warning lamp
comes on while
the engine is
running.The ESP ®
has been switched off.
Risk of accident!
When the ESP ®
is switched off it will not stabilize the vehicle if the
system recognizes that the vehicle starts to skid or that a wheel
is spinning.XSwitch the ESP ®
back on.
Exceptions: ( Y page 63).XIf leaving the ESP ®
switched off, adapt your speed and driving
to the prevailing road and weather conditions.XIf the ESP ®
cannot be switched back on: Have the system
checked at an authorized Mercedes-Benz Center as soon as
possible.dC 63 AMG only:
The yellow ESP ®
warning lamp
comes on while
the engine is
running.ESP ®
SPORT is activated.
Risk of accident!
When ESP ®
SPORT is activated it will only stabilize the vehicle to
a limited extent if the system recognizes that the vehicle starts to
skid or that a wheel is spinning.XSwitch the ESP ®
SPORT off ( Y page 64).
The message ESP On appears in the multifunction display.302What to do if …Practical hints
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ModelCapacityFuels, coolants,
lubricants, etc.Fuel tankAll models17.4 US gal (66.0 l)Premium unleaded
gasoline (Minimum
Posted Octane 91
[Avg. of
96 RON/86 MON])
C 300, all models
(with automatic
transmission):
Flexible Fuel
Vehicles (identified
by a label reading
Premium
gasoline or E85
only! on the fuel
filler flap).
Alternative fuel:
Ethanol fuel (E85)Fuel tank
reserveAll models,
except C 63 AMGapprox. 2.1 US gal (8.0 l)C 63 AMGapprox. 3.7 US gal (14.0 l)Air
conditioning
systemAll models—R134a refrigerant
and special
PAG lubricant oil
(never R 12)Washer
systemC 250 64
C 250 Sport 64
C 250 4MATIC 64
C 250 4MATIC Sport 644.2 US qt (4.0 l)MB Windshield
Washer
Concentrate 68
( Y page 358)
Washer fluid mixing
ratio ( Y page 358)C 300
C 300 Sport 65
C 350
C 350 Sport 653.7 US qt (3.5 l)Washer
system and
headlamp
cleaning
systemC 300 4MATIC
C 300 4MATIC Sport 65
C 350 4MATIC 64
C 63 AMG6.3 US qt (6.0 l)64 Canada only.
68 Mixed with water or commercially available premixed washer solvent/antifreeze.
65 USA only.352Fuels, coolants, lubricants, etc.Technical data
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Air conditioning refrigerant
R134a (HFC) refrigerant and special PAG
lubricating oil are used in the air conditioning
system.
! Never use R 12 (CFC) or mineral-based
lubricating oil. Otherwise damage to the
system will occur.
Brake fluid
GWarning!
During vehicle operation, the boiling point of
the brake fluid is continuously reduced
through the absorption of moisture from the
atmosphere.
Under extremely strenuous operating
conditions, this moisture content can lead to
the formation of bubbles in the system, thus
reducing the system’s efficiency.
Therefore, the brake fluid must be replaced
regularly. Refer to your vehicle’s Maintenance
Booklet for replacement interval.
Only brake fluid approved by Mercedes-Benz
is recommended. Any authorized Mercedes-
Benz Center will provide you with additional
information.
Premium unleaded gasoline
GWarning!
Gasoline is highly flammable and poisonous.
It burns violently and can cause serious
personal injury.
Never allow sparks, flames or smoking
materials near gasoline!
Turn off the engine before refueling.
Whenever you are around gasoline, avoid
inhaling fumes and any skin or clothing
contact. Extinguish all smoking materials.
Direct skin contact with fuels and the
inhalation of fuel vapors are damaging your
health.
! To maintain the engine’s durability and
performance, premium unleaded gasoline
must be used.
If premium unleaded gasoline is not
available and low octane gasoline is used,
follow these precautions:
R Have the fuel tank only partially filled
with unleaded regular gasoline and fill up
with premium unleaded gasoline as soon
as possible.
R Avoid full throttle driving and abrupt
acceleration.
R Do not exceed an engine speed of
3 000 rpm if the vehicle is loaded with a
light load such as two persons and no
luggage.
R Do not exceed 2
/ 3 of maximum
accelerator pedal position if the vehicle
is fully loaded or operating in
mountainous terrain.
Fuel requirements
Only use premium unleaded gasoline. The
octane number (posted at the pump) must be
91 min. It is an average of both the Research
Octane Number (RON) and the Motor Octane
Number (MON): (RON+MON)/2. This is also
known as the ANTI-KNOCK INDEX.
Reformulated gasolines (RFG) and/or
unleaded gasoline containing oxygenates
such as ethanol, TAME, ETBE, IPA, IBA, and
TBA can be used provided the ratio of any one
of these oxygenates to gasoline does not
exceed 10%; MTBE must not exceed 15%.
The ratio of methanol to gasoline must not
exceed 3% plus additional cosolvents.
Using mixtures of ethanol and methanol is not
allowed. Gasohol, which contains 10%
ethanol and 90% unleaded gasoline, can be
used.
These blends must also meet all other fuel
requirements, such as resistance to spark
knock, boiling range, vapor pressure, etc.
354Fuels, coolants, lubricants, etc.Technical data
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