octane MERCEDES-BENZ C320 2005 W203 Owner's Manual

13 Introduction
Operator’s Manual
Operating your vehicle outside the USA or Canada
If you plan to operate your vehicle in for-
eign countries, please be aware that

service facilities or replacement parts
may not be readily available,


unleaded gasoline for vehicles with cat-
alytic converters may not be available;
the use of leaded fuels will damage the
catalysts,


gasoline may have a considerably low-
er octane rating, and improper fuel can
cause engine damage.Certain Mercedes-Benz models are avail-
able for delivery in Europe under our Euro-
pean Delivery Program. For details, consult
an authorized Mercedes-Benz Center or
write to:
In the USA:
Mercedes-Benz USA, LLC
European Delivery Department
One Mercedes Drive
Montvale, NJ 07645-0350
In Canada:
Mercedes-Benz Canada Inc.
European Delivery Department
98 Vanderhoof Avenue
Toronto, Ontario M4G 4C9

276 OperationAt the gas station
Open the fuel filler flap by pushing at
the point indicated by arrow1.
The fuel filler flap springs open.

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

Take off cap and set it in direction of
arrow2 in the recess on the fuel filler
flap.
To prevent fuel vapors from escaping
into open air, fully insert filler nozzle
unit.

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

Replace fuel cap by turning it
clockwise.
You will hear when fuel cap is
tightened.

Close fuel filler flap.Warning!
G
Overfilling of the fuel tank may create
pressure in the system which could cause a
gas discharge. This could cause the gas to
spray back out when removing the fuel
pump nozzle, which could cause personal
injury.
iOnly use 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 are identified by
a label reading Premium gasoline or
E85 only! on fuel filler flap.
For more information, see “Flexible
Fuel Vehicles” (
page 392).
iLeaving the engine running and the fuel
cap open can cause theú malfunc-
tion indicator lamp (USA only) or
the± malfunction indicator lamp
(Canada only) to illuminate.
For more information, see “Practical
hints” (
page 304) and (
page 305).


378 Technical dataEngineModel
C 230 Kompressor (203.040)
1 (Canada only)
C 230 Kompressor Sport (203.040)
1
1The quoted data apply only to the standard vehicle. See an authorized Mercedes-Benz Center for the corresponding data of all special bodies and special equipment.
C 240 (203.061)
1
C 240 4MATIC (203.081)
1
Engine
271
112
Mode of operation
4-stroke engine, gasoline injection
4-stroke engine, gasoline injection
No. of cylinders
4
6
Bore
3.23 in (82.00 mm)
3.54 in (89.90 mm)
Stroke
3.35 in (85.00 mm)
2.68 in (68.20 mm)
Total piston displacement
109.6 cu in (1 796 cm
3)
158.5 cu in (2 597 cm
3)
Compression ratio
8.5:1
10.5:1
Output acc.
to SAE J 1349
189 hp/5 800 rpm
2
(141 kW/5 800 rpm)
2Premium fuel required. Performance may vary with fuel octane rating.
168 hp/5 500 rpm
2
(125 kW/5 500 rpm)
Maximum torque acc.
to SAE J 1349
192 lb-ft/3 500 - 4 000 rpm
(260 Nm/3 500 - 4 000 rpm)
177 lb-ft/4 500 rpm
(240 Nm/4 500 rpm)
Maximum engine speed
6 000 rpm
6200 rpm
Firing order
1-3-4-2
1-4-3-6-2-5
Poly-V-belt
2 420 mm
2380 mm

379 Technical data
Engine
Model
C 320 (203.064)
1 (USA only)
C 320 Sport (203.064)
1
C 320 4MATIC (203.084)
1
C 55 AMG (203.076)
1
Engine
112
113
Mode of operation
4-stroke engine, gasoline injection
4-stroke engine, gasoline injection
No. of cylinders
6
8
Bore
3.54 in (89.90 mm)
3.82 in (97.00 mm)
Stroke
3.31 in (84.00 mm)
3.60 in (92.00 mm)
Total piston displacement
195.2 cu in (3 199 cm
3)
331.8 cu in (5 439 cm
3)
Compression ratio
10:1
11:1
Output acc. to SAE J 1349
215 hp/5 700 rpm
2
(160 kW/5 700 rpm)
362 hp/5 750 rpm
2
(270 kW/5 750 rpm)
Maximum torque acc. to SAE J 1349
229 lb-ft/3 000 - 4 600 rpm
(310 Nm/3 000 - 4 600 rpm)
376 lb-ft/4 000 rpm
(510 Nm/4 000 rpm)
Maximum engine speed
6000 rpm
6700 rpm
Firing order
1-4-3-6-2-5
1-5-4-2-6-3-7-8
Poly-V-belt
2380 mm
2380 mm
1The quoted data apply only to the standard vehicle. See an authorized Mercedes-Benz Center for the corresponding data of all special bodies and special equipment.2Premium fuel required. Performance may vary with fuel octane rating.

388 Technical dataFuels, coolants, lubricants, etc.
Model
Capacity
Fuels, coolants, lubricants, etc.
Front axle
C2404MATIC
C3204MATIC
0.5 US qt (0.46 l)
Hypoid gear oil SAE 85 W 90
Transfer case
C2404MATIC
C3204MATIC
approx. 0.62 US qt (0.59 l)
MB Transfer case fluid
Power steering
approx. 1.1 US qt (1.0 l)
MB Power Steering Fluid (Pentosin CHF 11S)
Front wheel hubs
approx. 2.1 oz (60 g) each
High temperature roller bearing grease
Brake system
0.5 US qt (0.5 l)
MB Brake Fluid (DOT 4+)
Cooling system
C 230 Kompressor (all models)
C240 (all models)
C320 (all models)
C55AMG
approx. 5.9 US qt (5.6 l)
approx. 6.8 US qt (6.4 l)
approx. 6.8 US qt (6.4 l)
approx. 12.8 US qt (12.0 l)
MB 325.0 Anticorrosion/antifreeze agent
Fuel tank
including
a reserve of
16.4 US gal (62.0 l)
2.1 US gal (8.0 l)
Premium unleaded gasoline:
Minimum Posted Octane 91
(Avg. of 96 RON/86 MON)Flexible Fuel Vehicle (identified by a label
reading Premium gasoline or E85 only! on
fuel filler flap):
Alternative fuel: Ethanol fuel (E85)

391 Technical data
Fuels, coolants, lubricants, etc.
Premium unleaded gasoline
Fuel requirements
Only use premium unleaded fuel:

The octane number (posted at the
p um p) m us t be 91 mi n. It i s an a vera ge
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 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.
!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
persons and no luggage.


Do not exceed
2/3 of maximum
accelerator pedal position if the
vehicle is fully loaded or operating
in mountainous terrain.
iFlexible Fuel Vehicles (identified by a
label reading Premium gasoline or
E85 only! are designed to operate on
premium unleaded gasoline or Ethanol
fuel (E85) or any mixture of these two.
For more information, see “Flexible
Fuel Vehicles” (
page 392).

401 Technical terms
Instrument cluster
The displays and indicator/warning
lamps in the driver’s field of vision,
including the tachometer, speedo-
meter, engine temperature display and
fuel gauge.
Kickdown
Depressing the accelerator past the
point of resistance shifts the transmis-
sion 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
whether the door is locked or
unlocked. Pushing the lock button
down on an individual door from inside
will lock that door.Maintenance System (U.S. vehicles)
Maintenance service indicator in the
multifunction display that informs the
driver when the next vehicle mainte-
nance service is due. The Maintenance
System in your vehicle tracks distance
driven and the time elapsed since your
last maintenance service, and calls for
the next maintenance service accord-
ingly.
Memory function*
Used to store three individual seat,
steering wheel and mirror positions for
each SmartKey.
MON
(M
otor O
ctane N
umber)
The Motor Octane Number for gasoline
as determined by a standardized
method. 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
ANTI-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 engine 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.

402 Technical termsPower train
Collective term designating all
components used to generate and
transmit motive power to the drive
axles, including


engine


clutch/torque converter


transmission


transfer case


drive shaft


differential


axle shafts/axles
Program mode selector switch
Used to switch the automatic
transmission* between standard
operationS, comfort operationC and
manual operationM (C 55 AMG only).REST
(Residual engine heat utilization)
Feature that uses the engine heat
stored in the coolant to heat the
vehicle interior for a short time after
the engine has been turned off.
Restraint systems
Seat belts, belt tensioners, air bags
and child restraint systems. As inde-
pendent systems, their protective
functions complement one another.
RON
(R
esearch O
ctane N
umber)
The Research Octane Number for gaso-
line as determined by a standardized
method. It is an indication of a gaso-
line's ability to resist undesired deto-
nation (knocking). The average of both
the ->MON (Motor Octane Number)
and RON (Research Octane Number) is
posted at the pump, also known as
ANTI-KNOCK INDEX.Shift lock
When the vehicle is parked, this lock
prevents the transmission gear
selector lever from being moved out of
positionP without SmartKey turned
and brake pedal depressed.
SRS
(S
upplemental R
estraint S
ystem)
Seat belts, emergency tensioning
device and air bags. Though indepen-
dent systems, they are closely inter-
faced to provide effective occupant
protection.

422 Index
Automatic antiglare*
for rear view mirror 169
Exterior rear view mirror 41
Exterior rear view mirror
parking position* 148
Interior rear view mirror 41
Storing exterior rear view mirror
parking position* 108
MON 276, 401
Motor Octane Number see MON
Mph or km/h in speedometer 135
Multicontour seats* 104
Multifunction display 121, 401
Displaying gear range 159
Selecting language 136
Setting date (day) 140
Setting date (month) 139
Setting date (year) 141
Multifunction display messages
ABS 310
BAS 311
Brake fluid 315
Brake pads 315Coolant 316–318
Cruise control 319
Display 319
Doors 319
Engine oil 320–321
ESP 312–313
Fuel cap 305, 322
Hood 322
Key, SmartKey 322
Lamps, exterior 323–326
Oil 320–321
Parking brake 315
Restraint system 313
Seat belt system 327
SRS 313
Steering gear oil level 327
Tele Aid* 328
Telephone* 328
Tilt/sliding sunroof* 328
Trunk lid 328
Windshield washer fluid 328
Multifunction steering
wheel 26, 122, 401
Buttons 122N
Navigation system*
Operating 130
See separate COMAND*
operating instructions
Night security illumination 112
Setting 143
O
Occupant safety 58
Air bags 59
Children and air bags 60
Children in the vehicle 67
Fastening the seat belt 43
Infant and child restraint systems 67
LATCH-type child seat anchors 73
Seat belts 43, 62
Odometer, main 121
Oil
Adding 281
Oil level see Engine oil level
Oil see Engine oil

426 IndexRemote door unlock
With Tele Aid* 255
Removing
Ski sack* (Canada only) 237
Vehicle battery 361
Vehicle tool kit
(C 55 AMG only) 330
Vehicle tool kit
(except C 55 AMG) 329
Wheel 355
Wiper blades 352
Replacing
Backup lamp bulbs 351
Brake lamp bulbs 351
Bulbs 344
Fog lamp bulb, rear 351
Front lamp bulbs 345, 347
Fuses 369
High beam bulbs 348
High beam bulbs
(xenon-type* headlamps) 349
License plate lamp bulbs 351
Low beam bulbs 347
Parking lamp bulbs, front 348, 350Parking lamp bulbs, rear 351
Rear lamp bulbs 345, 351
Side marker lamp bulbs, front 350
Side marker lamp bulbs, rear 351
Standing lamp bulbs, front 348, 350
Standing lamp bulbs, rear 351
Tail lamp bulbs 351
Turn signal lamp bulbs,
front 348, 350
Turn signal lamp bulbs,
rear 351
Wiper blades 352
Reporting
Safety defects 18
Research Octane Number see RON
Reset button in the
instrument cluster 117, 132, 133
Resetting
All functions (control system) 132
All functions of a submenu 133
Fuel consumption 150
Maintenance service indicator 294
Trip odometer 119REST 402
Restraint system
Message in display 313
Restraint system see Infant and
child restraint systems
Reverse (manual transmission)
Shifting into 155
Rims 380
Roadside Assistance 12
RON 276, 402
Roof rack* 234
Rubber parts
Cleaning 300
S
Safety
Occupant 58
Safety belts see Seat belts
Safety defects
Reporting 18
Safety systems
Driving 77