MERCEDES-BENZ C320 2001 W203 Owner's Manual

282 Malfunction and warning messages
Te ch n i c a l
data Instruments
and controlsOperation DrivingInstrument
cluster displayPractical hints Car care Index
COOLANT (coolant temperature)
* C = Category, see page 274
1 This may indicate that the poly-V-belt has broken. Should this
con dition o ccur, the poly-V-belt must be repla ced befo re co ntin uin g
to operate the vehicle. Otherwise, the engine will overheat due to
an inoperative water pump which may result in damage to the
engine. 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.
2 The cooling fan for the coolant is faulty. Observe the coolant
temperature gauge. See page 124
During severe operating conditions and stop-and-go city
traffic, the coolant temperature may rise close to 120
°C.
The engine should not be operated with the coolant
temperature above 120
°C. Doing so may cause serious
engine damage which is not covered by the
Mercedes-Benz Limited Warranty.
Line 1 Line 2 C*
COOLANT STOP, ENGINE OFF!
1
1
COOLANT VISIT WORKSHOP!
2
2
Wa r n i n g !
Driving when your engine is badly overheated can
cause some fluids which may have leaked into the
engine compartment to catch fire. You could be
seriously burned.Steam from an overheated engine can cause serious
burns and can occur just by opening the engine
hood. Stay away from the engine if you see or hear
steam coming from it.Turn off the engine, get out of the vehicle and do
not stand near the vehicle until it cools down.

283 Malfunction and warning messages
Te ch n i c a l
data Instruments
and controlsOperation DrivingInstrument
cluster displayPractical hints Car care Index ENGINE OIL LEVEL
* C = Category, see page 274.
1 The engine oil level must be checked immediately. See Engine oil
level indicator on page 128.
2 There is no oil in the engine. There is a danger of engine damage.3 There is a risk of damaging the engine or catalytic converter. The
engine oil level must be checked immediately. See Engine oil level
indicator on page 128.
4 The engine oil level has dropped to a critical level.
Check the engine oil level immediately. See Engine oil level
indicator on page 128 and check the engine for visible leakage
(loss of oil).
It may be that there is water in the engine oil. Have the engine oil
checked.
5 The measuring system is malfunctioning.
When the “ENGINE OIL LEVEL – CHECK LEVEL!”
message appears while the engine is running and at
operating temperature, the engine oil level has dropped
to approximately 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 serious engine damage that is not covered by
the Mercedes-Benz Limited Warranty.
Line 1 Line 2 C*
ENGINE OIL LEVEL CHECK LEVEL!
1
2
ENGINE OIL LEVEL STOP, ENGINE OFF!
2
1
ENGINE OIL LEVEL REDUCE OIL LEVEL1
3
2
ENGINE OIL VISIT WORKSHOP!
4
2
ENGINE OIL LEVEL VISIT WORKSHOP!
5
2

284 Malfunction and warning messages
Te ch n i c a l
data Instruments
and controlsOperation DrivingInstrument
cluster displayPractical hints Car care Index
LIGHTING SYSTEM
Line 1 Line 2 C*
LOW BEAM,L CHECK LAMP! 2
LOW BEAM,R CHECK LAMP! 2
DISPLAY DEFECTIVE VISIT WORKSHOP!
1
2
TURN SIGNAL, L CHECK LAMP! 2
TURN SIGNAL, R CHECK LAMP! 2
L. TURN SIG. RFLECTR CHECK LAMP! 2
R. TURN SIG. RFLECTR CHECK LAMP! 2
TURN SIGNAL F, L CHECK LAMP! 2
TURN SIGNAL F, R CHECK LAMP! 2
BRAKE LIGHT
2
VISIT WORKSHOP! 2
BRAKE LIGHT, L
3
CHECK LAMP! 2
BRAKE LIGHT, R
3
CHECK LAMP! 2
3RD STOP LAMP
3
CHECK LAMP! 2
HIGH BEAM, L CHECK LAMP! 2
HIGH BEAM, R CHECK LAMP! 2
LICENSE PLATE L, L CHECK LAMP! 2
LICENSE PLATE L, R CHECK LAMP! 2
LIGHTS SWITCH OFF LIGHTS! 1
AUTOM. LIGHT ON REMOVE KEY! 1
FRONT FOGLAMP, L CHECK LAMP! 2
FRONT FOGLAMP, R CHECK LAMP! 2
REAR FOGLAMP CHECK LAMP! 2 Line 1 Line 2 C*

285 Malfunction and warning messages
Te ch n i c a l
data Instruments
and controlsOperation DrivingInstrument
cluster displayPractical hints Car care IndexIn t he case of bulb failures in certain lamps, ot her lamps
will substitute. See page 326 for instructions on
replacing bulbs.
* C = Category, see page 274
1 The display or the system is malfunctioning.
2 The brake lamps are switching on after a delay or are permanently
on – visit workshop immediately.
3 The brake lamp comprises several light emitting diodes. The
warning message will only appear if all light emitting diodes have
stopped working.
4 Other bulbs will be brought into use as replacements when certain
lamps blow. REAR FOGLAMP SWITCH OFF
SUBSTITUTE LAMP ON!
4
2
REVERSE LIGHT, L CHECK LAMP! 2
REVERSE LIGHT, R CHECK LAMP! 2
TAIL LIGHT, L CHECK LAMP!
SUBSTITUTE LAMP ON!
4
2
TAIL LIGHT, R CHECK LAMP!
SUBSTITUTE LAMP ON!
4
2
SIDELIGHT, L CHECK LAMP!
SUBSTITUTE LAMP ON!
4
2
SIDELIGHT, R CHECK LAMP!
SUBSTITUTE LAMP ON!
4
2 Line 1 Line 2 C*

286 Malfunction and warning messages
Te ch n i c a l
data Instruments
and controlsOperation DrivingInstrument
cluster displayPractical hints Car care Index
LIGHT SENSOR
* C = Category, see page 274The headlamps will be switched on automatically if the
light sensor malfunctions.
The “LIGHTING” setting menu can be set to “MANUAL”
in the individual settings. See page 117. It will then be
possible to switch the headlamps on and off using the
exterior lamp switch. See page 130 for notes on the
exterior lamp switch. DOOR
* C = Category, see page 274. Line 1 Line 2 C*
LIGHT SENSOR VISIT WORKSHOP! 2Line 1 Line 2 C*
DOOR OPEN! 1

287 Malfunction and warning messages
Te ch n i c a l
data Instruments
and controlsOperation DrivingInstrument
cluster displayPractical hints Car care Index TRUNK OPEN
* C = Category, see page 274
HOOD* C = Category, see page 274.See page 297 for hood.
Line 1 Line 2 C*
TRUNK OPEN! 2
Line 1 Line 2 C*
ENGINE HOOD OPEN! 2

288 Malfunction and warning messages
Te ch n i c a l
data Instruments
and controlsOperation DrivingInstrument
cluster displayPractical hints Car care Index
TELEPHONE – FUNCTION
* C = Category, see page 274.The display appears if button í or ì on the
multifunction steering wheel is pressed and the vehicle
is not equipped with a telephone.TELE AID
* C = Category, see page 274.
1 The Tele Aid system consists of three types of response; automatic
and manual emergency, roadside assistance and information. With
this message displayed, one or more functions may not be
avai lable.
See page 220 for notes on the Tele Aid.If a malfunction is indicated as outlined above, have the
system checked at the nearest Mercedes-Benz Center as
soon as possible.
Line 1 Line 2 C*
FUNCTION NOT AVAILABLE! 3
Line 1 Line 2 C*
TE L E A I D V I S I T WO R KS H O P !
1
1

289 Malfunction and warning messages
Te ch n i c a l
data Instruments
and controlsOperation DrivingInstrument
cluster displayPractical hints Car care Index WA S H E R F L U I D
* C = Category, see page 274.
When this message appears while the engine is
running, the level of the reservoir has dropped to
approximately
1/3 of the total volume. The reservoir
should be refilled with the prescribed mixture of MB
Windshield washer concentrate and water or the
concentrate and commercially available premixed
windshield washer solvent / antifreeze, depending on
ambient temperature, at the next opportunity. The
reservoir for the windshield and headlamp washer
systems is located in the engine compartment.
See windshield and headlamp washer system on
page 302 for instructions on topping up the washer
fluid.
Line 1 Line 2 C*
WASHER FLUID CHECK LEVEL! 3

290 Malfunction and warning messages
Te ch n i c a l
data Instruments
and controlsOperation DrivingInstrument
cluster displayPractical hints Car care Index
RESTRAINT SYSTEM
* C = Category, see page 274.See page 55 for notes on the seat belts, and page 65 for
notes on the airbags.KEY
* C = Category, see page 274.
1 Key needs possibly to be replaced. Line 1 Line 2 C*
RESTRAINT SYSTEM VISIT WORKSHOP! 1Line 1 Line 2 C*
REPLACE KEY
1
VISIT WORKSHOP! 2
AUTOM. LIGHT ON REMOVE KEY! 1

291 Malfunction and warning messages
Te ch n i c a l
data Instruments
and controlsOperation DrivingInstrument
cluster displayPractical hints Car care Index FUEL RESERVE
* C = Category, see page 274.
UNDERVOLTAGE* C = Category, see page 274. Line 1 Line 2 C*
RESERVE FUEL VISIT FILLING STATION! 2Line 1 Line 2 C*
UNDERVOLTAGE ENGINE ON! 1
UNDERVOLTAGE CONSUMER DEFECTIVE! 1