23 At a glance
Instrument cluster
Item
Page
1
Left turn signal indicator
lamp
2
Speedometer
3
Right turn signal indicator
lamp
4
Fuel gauge with:Fuel reserve warning lamp
258
5
<
Seat belt nonusage
warning lamp
258
1
Supplemental re-
straint system indi-
cator lamp
56,
256
6
Multifunction display
with:Trip odometer
105
Main odometer
Item
Page
Selector lever position
44,
138
Program mode
139
Outside temperature
display
106
Digital clock
118
7
?
Engine malfunction
indicator lamp
258
v
Electronic Stability
Program (ESP)
warning lamp
75,
254
A
High beam head-
lamp indicator
47,
101
E
Indicator lamp with-
out function
1
1The indicator lamp illuminates briefly when you
turn the key in the starter switch to position2.
DTRIndicator lamp with-
out function
1
Item
Page
8
-
Antilock Brake Sys-
tem (ABS) malfunc-
tion indicator lamp
73,
255
;
Brake warning
lamp, except Cana-
da
46,
257
3
Brake warning
lamp, Canada only
9
Tachometer
10
Reset knob:
Resetting trip odome-
ter
105
Resetting individual
settings
116
Instrument cluster illu-
mination
104
S203 MY03_A.book Page 23 Tuesday, January 28, 2003 2:22 PM
258 Practical hintsWhat to do if …Problem
Possible cause
Suggested solution
?
The yellow “CHECK ENGINE”
malfunction indicator lamp
comes on while driving.
There is a malfunction in:
The fuel management system
The ignition system
The emission control system
Systems which affect emissions
Such malfunctions may result in excessive
emissions values and may switch the engine
to its Limp-home (emergency operation)
mode.
Have the vehicle checked as soon as
possible by an authorized
Mercedes-Benz Center.
An on-board diagnostic connector is
used by the service station to link the
vehicle to the shop diagnostics sys-
tem. It allows the accurate identifica-
tion of system malfunctions through
the readout of diagnostic trouble
codes. It is located in the front left
area of the footwell next to the park-
ing brake pedal.
The fuel cap is not closed tight.
Check the fuel cap.
Your gas tank is empty.
After refuelling start the engine three
or four times in succession.
The limp-home mode is canceled. You do
not need to have your vehicle checked.
<
The red seat belt warning lamp
blinks for a brief period after
starting the engine.
The warning lamp reminds you to fasten seat
belts.
Fasten your seat belt.
The yellow fuel tank reserve warning lamp
lights up while driving.
The fuel level has gone below the reserve
mark.
Refuel at the next gas station
(page 232).
S203 MY03_A.book Page 258 Tuesday, January 28, 2003 2:22 PM
271 Practical hints
What to do if …
When the
ENGINE OIL LEVEL – CHECK LEV-
EL!
message appears while the engine is
running and at operating temperature, the
engine oil level has dropped to approxi-
mately the minimum mark on the dipstick.
When this occurs, the warning will first
come on intermittently and then stay on if
the oil level drops further.If no oil leaks are noted, continue to drive
to the nearest service station where the
engine oil should be topped to the “full”
mark on the dipstick with an approved oil.
!The engine oil level warnings should
not be ignored. Extended driving with
the symbol displayed could result in se-
rious engine damage that is not cov-
ered by the Mercedes-Benz Limited
Warranty.
Display
Possible cause
Suggested solution
A
RESERVE FUEL
VISIT FILLING STATION!
The fuel level has dropped below the re-
serve mark.
Refuel at the next gas station
(page 232).
Y
HOOD OPEN!
You are driving with the hood open.
Close the hood (
page 234).
I
REPLACE KEY
VISIT WORKSHOP!
No additional code available for Smart-
Key.
Visit an authorized Mercedes-Benz
Center as soon as possible.
AUTOM. LIGHT ON
REMOVE KEY!
Remove the key from the starter
switch.
.
LAMP SENSOR
VISIT WORKSHOP!
The lamp sensor is malfunctioning. The
headlamps switch on automatically.
In the control system, set lamp op-
eration to manual (
page 99).
Switch on headlamps using the ex-
terior lamp switch.
S203 MY03_A.book Page 271 Tuesday, January 28, 2003 2:22 PM
329 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:
Posted Octane 91 (Avg. of 96 RON / 86 MON)Flexible Fuel Vehicle (MY 2003 Mercedes-Benz C 320
models, except those equipped with manual transmission or
4MATIC*):
Alternative fuel -- ethanol fuel (E85)
Air conditioner system
R-134a refrigerant and special PAG lubricant oil (never R-12)
Windshield washer and
headlamp cleaning
system:
Without headlamp
cleaning system
With headlamp cleaning
system
3.2 US qt (3 l)
6.4 US qt (6 l)
MB Windshield Washer Concentrate
1
1Use MB Windshield Washer Concentrate “S” and water for temperatures above freezing or MB Windshield Washer Concentrate “S” and commercially available pre-
mixed windshield washer solvent/antifreeze for temperatures below freezing. Follow suggested mixing ratios (
page 336).
S203 MY03_A.book Page 329 Tuesday, January 28, 2003 2:22 PM
332 Technical dataFuels, coolants, lubricants etc.Gasoline additives
A major concern among engine manufac-
turers is carbon build-up caused by gaso-
line. Mercedes-Benz recommends only the
use of quality gasoline containing additives
that prevent the build up of carbon depos-
its.
After an extended period of using fuels
without such additives, carbon deposits
can build up especially on the intake valves
and in the combustion area, leading to en-
gine performance problems such as:
Warm-up hesitation
Unstable idle
Knocking/pinging
Misfire
Power loss
Do not blend any specific fuel additives
with fuel. This only results in unnecessary
cost and may be harmful to engine opera-
tion.Damage or malfunctions resulting from
poor fuel quality or from blending specific
fuel additives are not covered by the
Mercedes-Benz Limited Warranty.
Flexible Fuel Vehicles
MY 2003 Mercedes-Benz C 320 models,
except those equipped with manual trans-
mission or 4MATIC*, are Flexible Fuel Ve-
hicles.
These vehicles are designed to operate on
premium unleaded gasoline or Ethanol fuel
(E85), or on any mixture of these two.
Ethanol fuel (E85) is a mixture of approxi-
mately 85% ethanol and 15% unleaded gas-
oline.Switching fuels
For best performance and driveability it is
recommended to use either one or the oth-
er fuel. A refueling pattern that alternates
between the two different fuels should be
avoided if possible.
When switching fuels, make sure that:
Fuel level is below half full.
Fuel level is above reserve (reserve
warning lamp is not lit).
Amount of added fuel is more than
5 gallons (20 liters).Warning!
G
Ethanol fuel (E85) and its fumes 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 fueling. Never
smoke or create sparks close to ethanol.
S203 MY03_A.book Page 332 Tuesday, January 28, 2003 2:22 PM
352 Index
Checking level 235
Consumption 235
Display messages 270
Filler neck 236
Messages in display 237, 270
Viscosity 340
Engine oil level see Oil level 233
ESP 23, 75, 340
Four wheel electronic traction system
with ESP 78
Messages in display 268
Switching off 77
Switching on 77
Warning lamp 254
ETD 340
Safety guidelines 59
ETD (Emergency tensioning device) 64
Ethanol fuel
At the gas station 232
Switching fuels 332
Exterior lamp switch 98
Exterior lamps
Delayed shut-off 122
Exterior rear view mirrors
Adjusting 39
Parking position for 128F
Fahrenheit
Setting temperature units 119
Fastening the seat belts 40
Fine adjustment
Cruise control 192
First aid kit 279
Flat tire 300
Lowering the vehicle 304
Mounting the spare wheel 300
Preparing the vehicle 300
Spare wheel 281
Flexible fuel vehicles 329, 332
At the gas station 232
Switching fuels 332
Flexible Service System (FSS) 246
Flexible service system (FSS) 340
Fog lamp, rear 100, 293
Fog lamps
Replacing bulbs 292
Fog lamps, front 100
Messages in display 274
Replacing bulbs 293
Switching on 100
Four wheel electronic traction system
(4MATIC) with ESP 784MATIC 78
Front airbags 60
Front lamps
Bi-Xenon type 295
Halogen-type 294
Messages in display 272–275
Replacing bulbs 292, 294
Switching on 98
Front seat head restraints
Installing 91
Manual seat 91
Power seat* 91
Removing 91
Front seats
Heater 94
FSS 340
FSS (Flexible Service System) 246
Fuel 233
Additives 332
Cruising range 333
E85 (Ethanol fuel) 333
Fuel reserve warning lamp 258
Gasoline additives 332
Premium unleaded gasoline 233,
329, 331
Requirements 331
S203 MY03_A.book Page 352 Tuesday, January 28, 2003 2:22 PM
353 Index
Reserve warning 23
Switching (Flexible fuel vehicle) 332
Technical data 328
Fuel additives 332
Fuel consumption statistics
After start 129
Since last reset 129
Fuel filler flap 232
Locking 232
Opening 288
Unlocking 232
Fuel requirements 331
Fuel reserve tank
Message in display 271
Fuel tank
Capacity 329
Filler flap 232
Fuel, coolants, lubricants etc.
Flexible fuel vehicles 329
Fuels, coolants, lubricants etc.
Capacities 328
Functions (control system) 108, 111
Resetting 117
Fuse box 314
Fuse chart 314
Fuse extractor 315Fuses 314
Auxiliary fuse box in cargo
compartment 315
Fuse box in engine compartment 314
Fuse box in passenger
compartment 314
Fuse chart 314
Fuse extractor 315
Spare fuses 315
G
Garage door opener 27, 218
Erasing in remote control 220
Integrated remote control 219
Rolling code programming 219
Gasoline see Fuel 233
Gasoline additives 332
Gear range 340
Automatic transmission 137
Limiting 137
Shifting into optimal 136
Gear range limit
Canceling 136
Gear selector lever
Cleaning 251
Position 138Global
Locking 85
Unlocking 85
Global positioning system (GPS) 340
Glove box 21, 203
Closing 203
Opening 203
Good visibility 141
GPS 340
GPS see COMAND* 216
H
Halogen-type
Front lamp bulbs 294
Hand-held transmitter
Programming integrated remote
control 219
Hands-free microphone 27
Hard plastic trim items
Cleaning 252
Hazard warning flasher 101
Switching off 101
Switching on 101
Head restraints 91
Manual seats 33
Power seats* 35
Rear seats 35
S203 MY03_A.book Page 353 Tuesday, January 28, 2003 2:22 PM
355 Index
Operating 220
Rolling code programming 219
Interior lighting 102
Activating automatic control 102
Deactivating automatic control 102
Delayed shut-off 124
Manual operation 102
Interior storage spaces 203
Armrest 206
Cup holder 204
Glove box 203
Parcel net in front passenger
footwell 206
Storage compartment in front of
armrest 205
Interval wiping 50
Switching off 50
Switching on 50
J
Jack 280
Jump starting 308
K
Key dependency memory
Settings 127
Key positions in starter switch 31Key, mechanical 285
Key, SmartKey
Battery check lamp 85
Changing the batteries 287
Checking the batteries 86
Factory setting 85
Global locking 85
Global unlocking 85
Loss of 86
Positions in starter switch 31
Remote control 84
Restoring to factory setting 85
Selective setting 85
Starting the engine 44, 45
Turning off the engine 52
Unlocking with 30
Keys 84
Kickdown 140, 341
Kilometers/miles in speedometer 119
Km/h or mph in speedometer 119
L
Labels, identification 320
Lamp bulbs, exterior 292
Lamps, exterior
Front 292
Light sensor 271Messages in display 272–275
Rear 293
Lamps, indicator and warning
ABS 255
Airbag Off 61
Battery (SmartKey) 85
CHECK ENGINE 258
Coolant 265
Engine diagnostics 258
ESP 254
Fuel reserve 258
Instrument cluster 254–258
Seat belts 258
Service indicator 246
SRS 57
Turn signals 23
Language
Multifunction display 120
Setting 120
LATCH child seat anchors 70
LATCH child seat anchors
Folding back 70
Layout of poly-V-belt drive 321
Leather upholstery
Cleaning 252
S203 MY03_A.book Page 355 Tuesday, January 28, 2003 2:22 PM