warning MERCEDES-BENZ CLK320 CABRIOLET 2003 C208 Service Manual

233 Malfunction and warning messages
Te ch n i c a l
data Instruments
and controlsOperation DrivingInstrument
cluster displayPractical hints Car care Index ABS-SYSTEM
A malfunction has been detected in the system. The
brake system functions in the usual manner, but
without antilock assistance.
With the ABS malfunctioning, the BAS and ESP are also
switched off.
Have the system checked at your authorized
Mercedes-Benz Center as soon as possible.BRAKE ASSIST
A malfunction has been detected in the system. The
brake system functions in the usual manner, but
without BAS.
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ABS-SYSTEM VISIT WORKSHOP!
P54.30-2938-21
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BRAKE ASSIST VISIT WORKSHOP!
DISPLAY DEFECTIVE VISIT WORKSHOP!

234 Malfunction and warning messages
Te ch n i c a l
data Instruments
and controlsOperation DrivingInstrument
cluster displayPractical hints Car care Index
BRAKE LINING WEAR
When this message appears during braking, it indicates
that the brake pads are worn down.
Have the brake system checked at your authorized
Mercedes-Benz Center as soon as possible.
Brake pad thickness must be visually checked by a
qualified technician at the intervals specified in the
service booklet. BRAKE FLUID
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BRAKE LINING WEAR VISIT WORKSHOP!
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BRAKE FLUID VISIT WORKSHOP!Wa r n i n g !
Driving with this message displayed can result in
an accident. Have your brake system checked
immediately. Don’t add brake fluid before checking
the brake system. Overfilling the brake fluid
reservoir can result in spilling brake fluid on hot
engine parts and the brake fluid catching fire. You
can be seriously burned.

235 Malfunction and warning messages
Te ch n i c a l
data Instruments
and controlsOperation DrivingInstrument
cluster displayPractical hints Car care Index PA R K I N G B R A K E
Parking brake, see page 200.ENGINE FAN
1 The cooling fan for the coolant is faulty. Observe coolant
temperature gauge while driving, see page 82. Line 1 Line 2
PARKING BRAKE RELEASE BRAKE!Line 1 Line 2
ENGINE FAN VISIT WORKSHOP!
1

236 Malfunction and warning messages
Te ch n i c a l
data Instruments
and controlsOperation DrivingInstrument
cluster displayPractical hints Car care Index
COOLANT (coolant level)
When this message appears while driving, the coolant
level has dropped below the required level. If no leaks
are noticeable and the engine temperature does not
increase, continue to drive to the nearest service station
and have coolant added to the coolant system.The low engine coolant level warning should not be
ignored. Extended driving with the symbol displayed
may cause serious engine damage not covered by the
Mercedes-Benz Limited Warranty.
In cases of major or frequent minor coolant loss, have
the cooling system checked at your authorized
Mercedes-Benz Center as soon as possible.
Notes:
Do not drive without sufficient amount of coolant in the
cooling system. The engine will overheat causing major
engine damage.
Monitor the coolant temperature gauge while driving.
See page 253 for instructions on adding coolant.
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COOLANT CHECK LEVEL!
Wa r n i n g !
Do not spill antifreeze on hot engine parts.
Antifreeze contains ethylene glycol which may
burn if it comes into contact with hot engine parts.
You can be seriously burned.

237 Malfunction and warning messages
Te ch n i c a l
data Instruments
and controlsOperation DrivingInstrument
cluster displayPractical hints Car care Index COOLANT TEMP. (coolant temperature)
1 Observe coolant temperature gauge, see page 82.
Check coolant level, see page 253.
This may indicate that the poly-V-belt has broken. Should this
condition occur, the poly-V-belt must be replaced before continuing
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.
During severe operating conditions and stop-and-go city
traffic, the coolant temperature may rise close to the red
marking.
The engine should not be operated with the coolant
temperature in the red zone. Doing so may cause
serious engine damage which is not covered by the
Mercedes-Benz Limited Warranty.
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COOLANT TEMP. VISIT WORKSHOP!
1
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.

238 Malfunction and warning messages
Te ch n i c a l
data Instruments
and controlsOperation DrivingInstrument
cluster displayPractical hints Car care Index
LIGHTING SYSTEMWhen the message appears after starting the engine, or
if it comes on while driving, this indicates a failure in
the parking lamp, taillamp, stop lamp, or low beam
headlamp. See page 277 for instructions on replacing
bulbs.
If an exterior lamp fails, the message will appear only
when that lamp is switched on.
If a brake lamp fails, the message will appear when
applying the brake and stays on until the engine is
turned off.
Note:
If additional lighting is installed (e.g. auxiliary
headlamps etc.) be certain to connect into the fuse
before the failure indicator monitoring unit order to
avoid damaging the system.
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LAMP DEFECTIVE CHECK LAMPS!
DISPLAY DEFECTIVE VISIT WORKSHOP!

239 Malfunction and warning messages
Te ch n i c a l
data Instruments
and controlsOperation DrivingInstrument
cluster displayPractical hints Car care Index LIGHT SENSOR
With the electronic key removed and the driver’s door
open, a warning sounds and the message “SWITCH OFF
LIGHTS!” appears in the multifunction indicator if the
vehicle’s exterior lamps (except standing lamps) are not
switched off.STEER. WHEEL ADJUST.
For locking the adjustable telescoping steering column,
see page 73.
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STEER. WHEEL ADJUST.

240 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
1 The engine oil level must be checked immediately. See Engine oil
level indicator on page 108
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 108.
4 The engine oil level has dropped to a critical level.
Check the engine oil level immediately. See Engine oil level
indicator on page 108 and check the engine for visible leakage
(loss of oil).
5 The measuring system is malfunctioning.
6 It may be that there is water in the engine oil. Have the engine oil
checked.
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.
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ENGINE OIL LEVEL CHECK LEVEL!
1
ENGINE OIL LEVEL STOP, ENGINE OFF!
2
ENGINE OIL LEVEL REDUCE OIL LEVEL!
3
ENGINE OIL LEVEL VISIT WORKSHOP!
4
ENGINE OIL SENSOR VISIT WORKSHOP!
5
ENGINE OIL VISIT WORKSHOP!
6

241 Malfunction and warning messages
Te ch n i c a l
data Instruments
and controlsOperation DrivingInstrument
cluster displayPractical hints Car care Index ELEC. STABIL. PROG.
(Electronic stability program)
1 A malfunction has been detected in the system. Pressing the
accelerator pedal will require greater effort. Only partial engine
output will be available.
2 This message may be displayed if the power supply was
interrupted (battery disconnected or empty).
3 Synchronize ESP. See page 217
REMOVE KEY
This message plus an audible alarm indicate that the
electronic key is in steering lock position 0 or 1, and the
driver’s door is open.
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DISPLAY DEFECTIVE VISIT WORKSHOP!
ELEC. STABIL. PROG. VISIT WORKSHOP!
1, 2 , 3
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REMOVE KEY!
P54.30-3573-21

242 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 DWhen this message appears while the engine is
running, the level of the reservoir has dropped to
approx.
1/3 of the total volume. The reservoir should be
refilled with the prescribed mixture of MB Windshield
Washer Concentrate “S” 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 washer system on page 255 for
instructions on adding washer fluid.
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WASHER FLUID CHECK LEVEL!