2003 MERCEDES-BENZ C320 4MATIC WAGON oil pressure

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

242 OperationTires and wheelsLife of tire
The service life of a tire is dependent upon
varying factors including but not limited to:

Driving style


Tire pressure


Distance driven
Direction of rotation
Unidirectional tires offer added advantag-
es, such as better aquaplaning perfor-
mance. To benefit, however, you must
make sure that the tires rotate in the direc-
tion specified.
An arrow on the sidewall indicates the in-
tended direction of tire rotation.
Checking tire inflation pressure
Correct the tire pressure only when tires
are cold.
Regularly check your tire pressure at inter-
vals of no more than 14 days.
If the tires are warm you should only cor-
rect the tire pressure if it is too low for cur-
rent operating conditions.
A table on the fuel filler flap lists the spec-
ified tire inflation pressures for warm and
cold tires as well as for various operating
conditions.
Warning!
G
Tires and spare tire should be replaced after
six years, regardless of the remaining tread.!Keep unmounted tires in a cool, dry
place with as little exposure to light as
possible. Protect tires from contact
with oil, grease and gasoline.
Warning!
G
If the tire pressure repeatedly drops

check the tires for punctures from for-
eign objects


check to see whether air is leaking from
the valves or from around the rim
S203 MY03_A.book Page 242 Tuesday, January 28, 2003 2:22 PM

252 OperationVehicle careHard plastic trim items
Pour Mercedes-Benz approved Interior
Care onto soft lint-free cloth and apply
with light pressure.
Headliner
Clean with soft bristle brush, or use a
dry-shampoo cleaner in case of excessive
dirt.
Seat belts
The webbing must not be treated with
chemical cleaning agents. Use only clear,
lukewarm water and soap. Do not dry the
webbing at temperatures above 176°F
(80°C) or in direct sunlight.Leather upholstery
Using aftermarket seat covers or wearing
clothing that have the tendency to give off
coloring (e.g. when wet etc.) may cause
the upholstery to become permanently dis-
colored. By lining the seats with a proper
intermediate cover, contact-discoloration
will be prevented.
Wipe leather upholstery with a damp cloth
and dry thoroughly or clean with
Mercedes-Benz approved Leather Care.
Exercise particular care when cleaning per-
forated leather as its underside should not
become wet.
MB Tex upholstery
Pour Mercedes-Benz approved Interior
Care onto soft lint-free cloth and apply
with light pressure.
Plastic and rubber parts
Do not use oil or wax on these parts.Warning!
G
Do not bleach or dye seat belts as this may
severely weaken them. In a crash they may
not be able to provide adequate protection.
S203 MY03_A.book Page 252 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

345 Index
A
ABS 23, 73, 339
ABS control 74
Malfunction indicator lamp 255
Messages in display 261
Warning lamp 255
Accelerator position, automatic
transmission 140
Accident
In case of 50
Activating
Air circulation mode 148
Air conditioning (cooling) 150, 159
Air recirculation mode 148, 156
Anti-theft alarm system 79
Automatic climate control 153
Central locking (control system) 125
Climate control 145
Defrost 147, 156
Easy-entry/exit feature 126
ESP 77
Exterior headlamps 47
Exterior lamps 99
Exterior rear view mirror parking
position 142
Hazard warning flasher 101Headlamps 47
High beams 101
Ignition 31
Immobilizer 52, 79
Rear fog lamp 99
Rear window defroster 149, 158
Residual heat 159
Seat heater 94
Tow-away alarm 80
Windshield wipers 48
Adding
Coolant 238
Engine oil 236
Additional turn signals 292
Adjustable air vents, rear passenger
compartment 151, 160
Adjusting 32
Air distribution 147, 155
Air volume 147, 155
Backrest tilt 33, 35
Exterior rear view mirror 39
Head restraint height 33, 35, 36
Head restraint tilt 34, 35, 36
Head restraints 36
Inside rear view mirror 38
Instrument cluster illumination 104Manual seat 33
Mirrors 38
Multicontour seat* 93
Power seat 34
Rear seat head restraints 35
Seat cushion depth 93
Seat cushion tilt 33, 35
Seat fore and aft adjustment 33, 34
Seat height 33, 35
Seats 32
Steering column height 38
Steering column length 38
Steering wheel 37
Air conditioning (cooling)
Turning off 150, 159
Turning on 150, 159
Air conditioning refrigerant 330
Air distribution
Adjusting 147, 155
Air pressure see Tire inflation
pressure 242
Air recirculation mode 148, 156
Activating 148, 156
Deactivating 148, 157
Air vents, rear passenger compartment
Adjustable 151, 160
S203 MY03_A.book Page 345 Tuesday, January 28, 2003 2:22 PM

348 IndexButton
Audio system 164
C
CAC (Customer assistance center) 339
California
Important notice 11
Calling up
Range (distance to empty) 130
Service indicator 247
CAN system 339
Capacities
Fuels, coolants, lubricants, etc. 328
Cargo area see Cargo compartment 87
Cargo compartment
Auxiliary fuse box 315
Lighting 103
Parcel net 196
Storage compartment inside 197
Tailgate 87
Tie-down rings 202
Cargo tie-down rings 202
Casette mode
Playing cassettes 170
Cassette player
Operating 114
Catalytic converter 230CD changer* 174
CD mode 174
CD player
Operating 113
Center console 25
AIRBAG OFF indicator lamp 259
Lower part 26
Upper part 25
Centigrade
Setting temperature units 119
Central locking
Automatic 88
From inside 89
Switch 89
Switching on/off (control
system) 125
Unlocking from inside 89
Central locking switch 89
Certification label 320
Changing
Batteries (SmartKey) 287
Key setting 126
Changing CDs 174
Charcoal filter 157
Charging
Vehicle battery 306CHECK ENGINE malfunction indicator
lamp 23, 258
Checking
Coolant level 233, 238
Oil level 233, 235
Tire inflate pressure 233
Vehicle lighting 233
Child safety 65
Airbags 58
Infant and child restraint systems 62,
65
LATCH child seat anchors 70
Child safety switch see Blocking of rear
door window operation 71
Child seat anchors see LATCH child seat
anchors 70
Cigarette lighter 208
Cleaning
Cup holder 251
Gear selector lever 251
Hard plastic trim items 252
Headlamps 143
Headliner 252
Instrument cluster 251
Leather upholstery 252
Light alloy wheels 251S203 MY03_A.book Page 348 Tuesday, January 28, 2003 2:22 PM