2005 MERCEDES-BENZ C CLASS COUPE octane

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

289
Operation
At the gas station

Open the fuel filler flap by pushing at
the point indicated by the arrow
1.
The fuel filler flap springs open.

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

Take off the cap and set it in direction
of arrow 3 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 the fuel cap by turning it clock-
wise.
You should hear the fuel cap engage.

Close the fuel filler flap.
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.
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 are identified by
a label reading Premium gasoline or
E85 only! on the fuel filler flap.
For more information, see “Flexible
Fuel Vehicles” (
page 431).
iLeaving the engine running and the fuel
cap open can cause the ú malfunc-
tion indicator lamp (USA only) or the
± malfunction indicator lamp
(Canada only) to illuminate.
For more information, see “Practical
hints” section (
page 342).

418 Technical dataEngineModel
C 230 Kompressor (203.740)
1
1The quoted data apply only to the standard vehicle. See an authorized Mercedes-Benz Center for the corresponding data of all sp ecial bodies and special equipment.
C 320 (203.764)
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)
3.3 in (84.00 mm)
Total piston displacement
109.6 cu in (1796 cm
3)
195.2 cu in (3199 cm
3)
Compression ratio
8.5:1
10:1
Output acc. to SAE J 1349
189 hp / 5800 rpm
2
(141 kW / 5800 rpm)
2Premium fuel required. Performance may vary with fuel octane rating.
215hp/5700rpm
2
(160 kW / 5700 rpm)
Maximum torque acc. to SAE J 1349
192 lb-ft / 3500 rpm
(260 Nm / 3500 rpm)
229 lb-ft / 3000 rpm
(310 Nm / 3000 rpm)
Maximum engine speed
6000 rpm
6000 rpm
Firing order
1-3-4-2
1-4-3-6-2-5
Poly-V-belt
2420 mm
2380 mm

427
Technical data
Fuels, coolants, lubricants, etc.
Model
Capacity
Fuels, coolants, lubricants, etc.
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 Vehicles (identified by a label reading
Premium gasoline or E85 only!
on fuel filler flap):
Alternative fuel: Ethanol fuel (E85)
Air conditioning system
R-134a refrigerant and special PAG lubricant oil
(never R-12)
Windshield washer
3.2 US qt (3.0 l)
MB Windshield Washer Concentrate
1
Windshield washer and
headlamp cleaning system*
6.4 US qt (6.0 l)
1Use MB Windshield Washer Concentrate “S” and water for temperatur es above freezing point or MB Windshield Washer Concentrate “S” and commercially available
premixed windshield washer solvent/antifreeze for temperatures below freezing point. Follow suggested mixing ratios ( page 435).

429
Technical data
Fuels, coolants, lubricants, etc.
Premium unleaded gasoline
Fuel requirements
Use only premium unleaded fuel meeting
ASTM standard D 439:

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
3000 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.
iFlexible Fuel Vehicles (identified by a
label reading Premium gasoline or
E85 only! on fuel filler flap) are de-
signed to operate on premium unlead-
ed gasoline or Ethanol fuel (E85), or any
mixture of these two.
For more information, see “Flexible
Fuel Vehicles” (
page 431).

439
Technical terms
GPS*
(G
lobal P
ositioning S
ystem)
Satellite-based system for relaying
geographic location information to and
from vehicles equipped with special re-
ceivers. Employs CD digital maps for
navigation.
GVW (G
ross V
ehicle W
eight)
(
page 324)
GVWR (Gross V
ehicle W
eight R
ating)
(
page 324)
Instrument cluster The displays and indicator/warning
lamps in the driver’s field of vision, in-
cluding the tachometer, speedometer
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 vehi-
cle and should not be used for normal
acceleration needs.
Kilopascal (kPa) (
page 324)
Lock button Button on the door which indicates
whether the door is locked or un-
locked. 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. Maximum load rating
(
page 324)
Maximum loaded vehicle weight (page 324)
Maximum tire inflation pressure (page 324)
Memory function* Used to store three individual seat,
steering wheel and mirror positions for
each SmartKey.
MON (Motor O
ctane N
umber)
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
ANTI-KNOCK INDEX.

440 Technical termsMultifunction displayDisplay field in the instrument cluster
used to present information provided
by the control system.
Multifunction steering wheel Steering wheel with buttons for operat-
ing the control system.
Normal occupant weight (
page 324)
OCS (Occupant C
lassification S
ystem)
The system automatically turns the
front passenger front air bag on or off
based on the classified occupant size
category determined by weight sensor
readings from the seat.
Overspeed range Engine speeds within the red marking
of the tachometer dial. Avoid this en-
gine speed range, as it may result in se-
rious 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.
Power train Collective term designating all compo-
nents used to generate and transmit
motive power to the drive axles, includ-
ing


engine


clutch/torque converter


transmission


transfer case


drive shaft


differential


axle shafts/axles
Production options weight (
page 324)
Program mode selector switch Used to switch the automatic transmis-
sion between standard operation S and
winter operation C. PSI
(P
ounds per s
quare i
nch)
(
page 325)
Recommended tire inflation pressure (page 325)
Restraint systems Seat belts, child restraints, lower an-
chors and tethers for children (LATCH).
As independent systems, their protec-
tive functions complement one
another.
Rim (page 325)
RON (Research 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 detona-
tion (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.

457
Index
MON 289
MON (Motor Octane Number) 439
Mph or km/h in speedometer 137
Multifunction display 123, 440
Displaying gear range 161
Selecting language 138
Setting date (day) 142
Setting date (month) 141
Setting date (year) 143
Standard display 127
Multifunction display messages ABS 353
BAS 354
Brake fluid 358
Brake pads 358
Coolant 359–361
Cruise control 362
Display 362
Doors 362
Engine oil 363–364
ESP 355–356
Fuel cap 365
Hood 365
Key, SmartKey 365
Lamps, exterior 366–370
Oil 363–364 Panorama roof with power tilt/sliding
panel* 372
Parking brake 358
Restraint system 356
SRS 356
Steering gear oil level 371
Tele Aid* 372
Telephone* 372
Trunk lid 372
Windshield washer fluid 372
Multifunction steering wheel 26, 124, 440Buttons 124
N
Navigation system* Operating 131
See separate COMAND* operating in-structions
Night security illumination 112 Setting 146
Normal occupant weight 324 O
Occupant Classification System see OCS
Occupant distribution 324
Occupant safety 60
Air bags 61
Children and air bags 62
Children in the vehicle 70
Fastening the seat belt 44
Front passenger front air bag off indica-tor lamp 27, 76, 345
Infant and child restraint systems 66, 70
LATCH child seat anchors 78
OCS 73, 440
Seat belts 44, 64
OCS 73, 440 Self-test 77
Odometer, main 25
Oil Adding 294
Consumption 292
Filler neck 295
Viscosity 438
Oil level Checking 290