Page 257 of 370

263 Practical hints
What to do if …
Display
Possible cause
Suggested solution
#
BATTERY/ALTERNATOR
VISIT WORKSHOP!
The battery was charged with a battery
charger or jump started.
Have the battery checked at a service
station.
The battery is no longer charging.
Possible causes:
alternator malfunctioning
broken poly-V-belt
Stop immediately and check the
poly-V-belt.
If it is broken:
Do not continue to drive. Otherwise
the engine will overheat due to an in-
operative water pump which may re-
sult in damage to the engine. Notify an
authorized Mercedes-Benz Center.
If it is intact:
Drive immediately to the nearest au-
thorized Mercedes-Benz Center.
3
(Canada only)
;
(USA only)
BRAKE PAD WEAR
VISIT WORKSHOP!
The brake pads have reached their wear lim-
it.
Have the brake pads replaced as soon
as possible.
!Brake pad thickness must be visually
checked by a qualified technician at the
intervals specified in the Service book-
let.
S203 MY03_A.book Page 263 Tuesday, January 28, 2003 2:22 PM
Page 261 of 370
267 Practical hints
What to do if …
Display
Possible cause
Suggested solution
Ï
COOLANT
STOP, ENGINE OFF!
The poly-V-belt could be broken.
Stop immediately and check the
poly-V-belt.
If it is broken:
Do not continue to drive. Otherwise
the engine will overheat due to an
inoperative water pump which may
result in damage to the engine. No-
tify an authorized Mercedes-Benz
Center.
If it is intact:
Do not continue to drive the vehicle
with this message displayed. Doing
so could result in serious engine
damage that is not covered by the
Mercedes-Benz Limited Warranty.
COOLANT
VISIT WORKSHOP!
The cooling fan for the coolant is mal-
functioning.
Observe the coolant temperature
display.
Have the fan replaced as soon as
possible.
S203 MY03_A.book Page 267 Tuesday, January 28, 2003 2:22 PM
Page 269 of 370

275 Practical hints
What to do if …
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Possible cause
Suggested solution
.
TAIL LAMP, R
CHECK LAMP!
SUBSTITUTE LAMP ON!
The right tail lamp is malfunctioning. A
backup bulb is being used.
Visit an authorized Mercedes-Benz
Center as soon as possible.
SIDE MARKER LAMP, LF
CHECK LAMP!
SUBSTITUTE LAMP ON!
The left parking lamps are malfunctioning.
A backup bulb is being used.
Visit an authorized Mercedes-Benz
Center as soon as possible.
SIDE MARKER LAMP, RF
CHECK LAMP!
SUBSTITUTE LAMP ON!
The right parking lamps are malfunction-
ing. A backup bulb is being used.
Visit an authorized Mercedes-Benz
Center as soon as possible.
LIGHTS
TURN OFF LAMPS!
This display appears if the driver’s door is
opened with the engine shut off and no
key in the starter switch.
Insert key in the starter switch.
Switch off lights.
AUTOM. LIGHT ON
REMOVE KEY!
Key in the starter switch position1 or2.
Remove key from the starter switch.
!
(Canada only)
;
(USA only)
PARKING BRAKE
RELEASE PARKING BRAKE!
You are driving with the parking brake set.
Release the parking brake
(page 46).
<
SEAT BELT SYSTEM
VISIT WORKSHOP!
The seat belt system is malfunctioning.
Visit an authorized Mercedes-Benz
Center as soon as possible.
S203 MY03_A.book Page 275 Tuesday, January 28, 2003 2:22 PM
Page 270 of 370
276 Practical hintsWhat to do if …Display
Possible cause
Suggested solution
<
DRIVER’S SEAT BELT
FASTEN SEAT BELT!
The display reminds you and your pas-
sengers to fasten seat belts.
Fasten the seat belts.
_
STEERING WHEEL ADJUST
LOCK!
The steering column is not properly
locked.
Lock the steering column properly
(page 37).
POWER STEERING FLUID
VISIT WORKSHOP!
The steering gear oil level is too low.
There is a danger of steering gear dam-
age.
Have the system checked by an au-
thorized Mercedes-Benz Center.
Warning!
G
If the level of steering gear oil in reservoir is
too low, the steering power assistance could
fail. Much greater effort will then be needed
to turn the steering wheel.
Do not add steering oil without checking the
steering system.
Do not drive the vehicle. Have the system
checked at your authorized Mercedes-Benz
Center as soon as possible.
S203 MY03_A.book Page 276 Tuesday, January 28, 2003 2:22 PM
Page 311 of 370
317 Technical data
Spare parts service
Warranty coverage
Identification labels
Layout of poly-V-belt drive
Engine
Rims and Tires
Electrical system
Main Dimensions
Weights
Fuels, coolants, lubricants etc.
Consumer information
S203 MY03_A.book Page 317 Tuesday, January 28, 2003 2:22 PM
Page 315 of 370
321 Technical data
Layout of poly-V-belt drive
Layout of poly-V-belt drive
C240, C320
1Idler pulley
2Automatic belt tensioner
3Power steering pump
4Air conditioner compressor
5Crankshaft
6Coolant pump, fan
7Generator (alternator)
S203 MY03_A.book Page 321 Tuesday, January 28, 2003 2:22 PM
Page 316 of 370

322 Technical dataEngine
EngineModel
C 240 (203.261)
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 320 (203.264)
1
C 240 4MATIC (203.281)
1
C 320 4MATIC (203.284)
1
Engine
112
112
Mode of operation
4-stroke engine, gasoline injection
4-stroke engine, gasoline injection
No. of cylinders
6
6
Bore
3.54 in (89.90 mm)
3.54 in (89.90 mm)
Stroke
2.68 in (68.20 mm)
3.31 in (84.00 mm)
Total piston displacement
158.5 cu.in. (2 597 cm
3)
195.2 cu.in. (3 199 cm
3)
Compression ratio
10.5:1
10:1
Output acc. to SAE J 1349
167 hp / 5 500 rpm
(125 kW / 5 500 rpm)
214 hp / 5 700 rpm
(160 kW / 5 700 rpm)
Maximum torque acc. to SAE J 1349
177ft.lb/4500rpm
(240 Nm / 4 500 rpm)
229 ft.lb / 3 000 rpm
(310 Nm / 3 000 rpm)
Maximum engine speed
6000 rpm
6000 rpm
Firing order
1-4-3-6-2-5
1-4-3-6-2-5
Poly-V-belt
7ft 10in (2390mm)
7 ft 10 in (2 390 mm)
S203 MY03_A.book Page 322 Tuesday, January 28, 2003 2:22 PM
Page 334 of 370

340 Technical termsCOMAND*
(Cockpit Management and Data Sys-
tem)
Information and operating center for
vehicle sound and communications
systems, including the radio and navi-
gation system, as well as for other op-
tional equipment (CD changer*,
telephone*, etc.).
Control system
The control system is used to call up vehi-
cle information and to change component
settings. Information and messages ap-
pear in the multifunction display. The driv-
er uses the buttons on the multifunction
steering wheel to navigate through the sys-
tem and to adjust settings.
Cruise control
Driving convenience system for automati-
cally maintaining the vehicle speed set by
the driver.Engine number
The number set by the manufacturer and
placed on the cylinder block to uniquely
identify each engine produced.
Engine oil viscosity
Measurement for the inner friction (viscos-
ity) of the oil at different temperatures. The
higher the temperature an oil can tolerate
without becoming thin, or the lower the
temperature it can tolerate without be-
coming viscous, the better the viscosity.
ESP
(Electronic Stability Program)
Improves vehicle handling and direc-
tional stability.
ETD
(Emergency Tensioning Device)
Device which deploys in certain frontal
and rear collisions exceeding the sys-
tem's threshold to tighten the seat
belts.
->SRSFSS
(Flexible Service System)
Service indicator in the multifunction
display that informs the driver when
the next vehicle maintenance service is
due.
Gear range
Number of gears which are available to the
automatic transmission for shifting. The
automatic gear shifting process can be
adapted to specific operating conditions
using the selector lever.
GPS
(Global Positioning System)
Satellite-based system for relaying
geographic location information to and
from vehicles equipped with special re-
ceivers. Employs CD digital maps for
navigation.S203 MY03_A.book Page 340 Tuesday, January 28, 2003 2:22 PM