fuel pump MERCEDES-BENZ C240 4MATIC WAGON 2003 S203 Owner's Manual

232 OperationAt the gas station
At the gas station
The fuel filler flap is located on the
right-hand side of the vehicle towards the
rear. Locking/unlocking the vehicle with
the remote control automatically
locks/unlocks the fuel filler flap.
Remove the key from the starter
switch.

Open the fuel filler flap by pushing at
the point indicated by the arrow.

Turn the fuel cap to the left and hold on
to it until possible pressure is released.

Take off the cap and set it in the recess
on the fuel filler flap.

Only fill your tank until the filler nozzle
unit cuts out – do not top up or overfill.

Replace the fuel cap by turning it to the
right.
You will hear when the fuel cap is tight-
ened.

Close the fuel filler flap.
Warning!
G
Gasoline is highly flammable and poisonous.
It burns violently and can cause serious inju-
ry. Whenever you are around gasoline, avoid
inhaling fumes and skin contact, extinguish
all smoking materials. Never allow sparks,
flame or smoking materials near gasoline!Warning!
G
Flexible Fuel Vehicles (MY 2003
Mercedes-Benz C 320 models, except those
equipped with manual transmission or
4MATIC*) only:
Ethanol fuel (E85) and its vapors are highly
flammable, poisonous and burn easily. Etha-
nol fuel can cause serious injuries if ignited
or if you come into contact with it or inhale
fumes of it. Avoid inhalation of Ethanol
fumes and skin contact with Ethanol. Extin-
guish all open flames before refueling. Never
smoke or create sparks close to Ethanol.
Warning!
G
Overfilling of the fuel tank may create pres-
sure in the system which could cause a gas
discharge. This could cause the gas to spray
back out when removing the fuel pump noz-
zle, which could cause personal injury.
S203 MY03_A.book Page 232 Tuesday, January 28, 2003 2:22 PM

233 Operation
At the gas station
Check regularly and before a long trip
1Coolant level
More information on the coolant level
can be found in the “Operation” section
(
page 238).
2Brake fluid (fuse box cover removed)
More information on brake fluid can be
found in the “Technical data” section
(page 330).
3Windshield washer and headlamp
cleaning system
For more information on refilling the
reservoir, see the “Operation” section
(page 240).Engine oil level
More information on engine oil can be
found in the “Operation” section
(
page 235).
Opening hood (
page 234).
Coolant
For normal replenishing, use water (pota-
ble water quality). More information on
coolant can be found in the “Operation”
section (
page 238).
Vehicle lighting
Check function and cleanliness. For more
information on replacing light bulbs, see
the “Practical hints” section (
page 292).
Exterior lamp switch (
page 98).
Tire inflation pressure
More information on tire inflation pressure
can be found in the “Operation” section
(
page 242).
iUse only premium unleaded gasoline
with a minimum Posted Octane Rating
of 91 (average of 96 RON / 86 MON).
Information on gasoline quality can
normally be found on the fuel pump.
More information on gasoline can be
found in the Factory Approved Service
Products pamphlet.
Flexible Fuel Vehicles: MY 2003
Mercedes-Benz C320 models, except
those equipped with manual transmis-
sion or 4MATIC*.
More information on Flexible Fuel Vehi-
cles can be found in the “Technical Da-
ta” section (
page 332).
iLeaving the engine running and the fuel
cap open can cause the
?
lamp to
illuminate.
See also “Practical hints” section
(
page 258).
S203 MY03_A.book Page 233 Tuesday, January 28, 2003 2:22 PM

331 Technical data
Fuels, coolants, lubricants etc.
Premium unleaded gasoline
Fuel requirements
Use only Premium unleaded meeting
ASTM standard D 439:

The octane number (posted at the
pump) must be 91 min. It is an average
of both the Research (R) octane num-
ber and the Motor (M) octane number:
(R+M) / 2). This is also known as the
ANTI-KNOCK INDEX.Unleaded gasoline containing oxygenates
such as Ethanol, IPA, IBA and TBA can be
used provided the ratio of any one of these
oxygenates to gasoline does not exceed
10%; MTBE not to 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.
!To maintain the engine’s durability and
performance, premium unleaded gaso-
line must be used. If premium unleaded
is not available and low octane fuel is
used, follow these precautions:

Have the fuel tank only partially
filled with unleaded regular and fill
up with premium unleaded as soon
as possible.


Avoid full throttle driving and abrupt
acceleration.


Do not exceed an engine speed of
3 000 rpm if the vehicle is loaded
with a light load such as two per-
sons and no luggage.


Do not exceed
2/3 of maximum ac-
celerator pedal position if the vehi-
cle is fully loaded or operating in
mountainous terrain.
iMY 2003 Mercedes-Benz C 320 mod-
els, except those equipped with manu-
al transmission or 4MATIC*, are
Flexible Fuel Vehicles.
These vehicles are designed to operate
on premium unleaded gasoline or Etha-
nol fuel (E85), or on any mixture of
these two.
See notes on Flexible Fuel Vehicles
(page 332).
S203 MY03_A.book Page 331 Tuesday, January 28, 2003 2:22 PM

341 Technical terms
Instrument cluster
The displays and indicator/warning lamps
in the driver’s field of vision, including the
tachometer, speedometer, engine temper-
ature display and fuel gauge.
Kickdown
Depressing the accelerator past the point
of resistance shifts the transmission down
to the lowest possible gear. This very
quickly accelerates the vehicle and should
not be used for normal acceleration needs.
Lock button
Button on the door which indicates wheth-
er the door is locked or unlocked. Pushing
the lock button down on an individual door
from inside will lock that door.
Memory function*
Used to store three individual seat, steer-
ing wheel and mirror positions for each
key.Menu
The control system displays are arranged
in menus. Each menu contains a number of
commands for particular systems. In the
Audio menu, for example, you will find the
commands SELECT RADIO STATION or OP-
ERATE CD PLAYER. Using commands you
can directly change the settings for your
vehicle.
MON
(Motor Octane Number)
The Motor Octane Number for gasoline
as determined by a standardized meth-
od. It is an indication of a gasoline's
ability to resist undesired detonation
(knocking). The average of both the
MON (Motor Octane Number) and
->RON (Research Octane Number) is
posted at the pump, also known as AN-
TI-KNOCK INDEX.Multifunction display
Display field in the instrument cluster used
to present information provided by the
control system.
Multifunction steering wheel
Steering wheel with buttons for operating
the control system.
Overspeed range
Engine speeds within the red marking of
the tachometer dial. Avoid this engine
speed range, as it may result in serious en-
gine damage that is not covered by the
Mercedes-Benz Limited Warranty.
Poly-V-belt drive
Drives engine-components (alternator,
AC compressor, etc.) from the engine.
S203 MY03_A.book Page 341 Tuesday, January 28, 2003 2:22 PM