2004 MERCEDES-BENZ CLK320 CABRIOLET Owner's Manual

321 Practical hints
What to do if …?
Text messagesDisplay
Display message
Possible cause
Possible solution
ABS
Anti-lock
braking system
not working!
The charging voltage has fallen below
10 volts and the ABS has switched off.
The brake system is still functioning nor-
mally but without the ABS available.

When the voltage is above this value
again, the ABS is operational again.

Continue driving with added caution.
Wheels will lock during hard braking,
reducing steering capability.

Have the system checked at an autho-
rized Mercedes-Benz Center as soon
as possible.
Failure to follow these instructions in-
creases the risk of an accident.
Defective!
Visit workshop!
The ABS has detected a malfunction and
has switched off. The ESP and the BAS are
also deactivated.
The brake system is still functioning nor-
mally but without the ABS available.

Continue driving with added caution.
Wheels will lock during hard braking,
reducing steering capability.

Have the system checked at an autho-
rized Mercedes-Benz Center as soon
as possible.
Failure to follow these instructions in-
creases the risk of an accident.

322 Practical hintsWhat to do if …?Display
Display message
Possible cause
Possible solution
ABS
Display defective!
Visit workshop!
The ABS or the ABS display is malfunc-
tioning.

Continue driving with added caution.
Wheels will lock during hard braking,
reducing steering capability.

Have the system checked at an autho-
rized Mercedes-Benz Center as soon
as possible.
Failure to follow these instructions in-
creases the risk of an accident.
BAS
Defective!
Visit workshop
The BAS has detected a malfunction and
switched off.

Continue driving with added caution.

Have the system checked at an autho-
rized Mercedes-Benz Center as soon
as possible.
Failure to follow these instructions in-
creases the risk of an accident.
Display defective
Visit workshop
BAS or the BAS display is malfunctioning.

Continue driving with added caution.

Have the system checked at an autho-
rized Mercedes-Benz Center as soon
as possible.
Failure to follow these instructions in-
creases the risk of an accident.

323 Practical hints
What to do if …?
Display
Display message
Possible cause
Possible solution
BAS
not available
See operator’s manual
The charging voltage has fallen below
10 volts and the BAS has switched off.
The brake system is still functioning nor-
mally but without the BAS available.

When the voltage is above this value
again, the BAS is operational again.

Have the system checked at an autho-
rized Mercedes-Benz Center as soon
as possible.
Failure to follow these instructions in-
creases the risk of an accident.
Cruise Con-
trol
Visit workshop!
Cruise control or Distronic* is malfunc-
tioning.

Have cruise control or Distronic*
checked by an authorized
Mercedes-Benz Center.
Distronic
External interference
Reactivate!
Distronic* is switched off and is tempo-
rarily unavailable.

Try activating Distronic* again later.
Currently unavailable!
see oper. manual
Distronic* is switched off because the
Distronic* cover in the radiator grille is
dirty.

Clean the Distronic* cover in the radi-
ator grille (
page 308).

Restart the vehicle.
Visit workshop!
Distronic* is malfunctioning or the display
is malfunctioning.

Visit an authorized Mercedes-Benz
Center as soon as possible.

324 Practical hintsWhat to do if …?Display
Display message
Possible cause
Possible solution
ESP
Defective!
Visit workshop!
The ESP was deactivated because of a
malfunction or interrupted power supply.
The ABS might not be operational.

Continue driving with added caution.

Visit an authorized Mercedes-Benz
Center as soon as possible.
Failure to follow these instructions in-
creases the risk of an accident.
Display defective
Visit workshop!
The ESP or the ESP display is malfunction-
ing.

Continue driving with added caution.

Visit an authorized Mercedes-Benz
Center as soon as possible.
Failure to follow these instructions in-
creases the risk of an accident.
not available!
See operator’s manual
The charging voltage has fallen below
10 volts and the ESP has switched off.
When the voltage is above this value
again, the ESP is operational again.
If necessary, have the generator and
battery checked.
The self-diagnosis has not been complet-
ed.
The display will clear after driving a short
distance at more than 12 mph (20 km/h).

325 Practical hints
What to do if …?
Display
Display message
Possible cause
Possible solution
P
Selector lever
in park position
You have turned off the engine with the
KEYLESS-GO* start/stop button in gear
selector lever positionN and opened the
driver’s door.
or
You have attempted to switch off the en-
gine with the KEYLESS-GO* start/stop
button while the gear selector lever was in
positionR orD.

Place the gear selector lever in
positionP.
Please move
selector lever to P
or N
You have attempted to start the engine
with the KEYLESS-GO* start/stop button
while the gear selector lever was in
positionR orD.

Place the gear selector lever in
positionP or N.

326 Practical hintsWhat to do if …?Symbol messagesDisplay symbol
Display message
Possible cause
Possible solution
#
Undervoltage
Charge battery
The battery has insufficient voltage.

Start the engine (
page 43).
Undervoltage
Switch off
consumers
The battery has insufficient voltage.

Turn off unnecessary electrical con-
sumers.
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. Ad-
just driving to be consistent with
reduced braking responsiveness.

327 Practical hints
What to do if …?
Display symbol
Display message
Possible cause
Possible solution
2
Brake wear
Visit workshop
!
The brake pads have reached their wear
limit.

Have the brake pads replaced as soon
as possible.
;
(USA only)
!
(Canada only)
Parking brake
Release brake!
You are driving with the parking brake set.

Release the parking brake
(page 46).
;
(USA only)
3
(Canada only)
Brake fluid
Visit workshop!
There is insufficient brake fluid in the res-
ervoir.

Risk of accident! Stop the vehicle and
notify an authorized Mercedes-Benz
Center. Do not add brake fluid! This
will not solve the problem.
Warning!
G
Driving with this message displayed can re-
sult in an accident. Have your brake system
checked immediately. Don’t add brake fluid
before checking the brake system. Overfill-
ing the brake fluid reservoir can result in
spilling brake fluid on hot engine parts and
the brake fluid catching fire. You can be se-
riously burned.
!If you find that the brake fluid in the
brake fluid reservoir has fallen to the
minimum mark or below, have the
brake system checked for brake pad
thickness and leaks.
!Brake pad thickness must be visually
checked by a qualified technician at the
intervals specified in the Service Book-
let.

328 Practical hintsWhat to do if …?Display symbol
Display message
Possible cause
Possible solution
?
Visit workshop!
There may be a malfunction in the

fuel injection system


ignition system


exhaust system


fuel system

Have the measuring system checked
by an authorized Mercedes-Benz Cen-
ter.
B
Coolant
Check level
The coolant level is too low.

Add coolant (
page 292).

If you have to add coolant frequently,
have the cooling system checked by
an authorized Mercedes-Benz Center.
Warning!
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.
!Do not ignore the low engine coolant
level warning. Extended driving with
the message and symbol displayed
may cause serious engine damage not
covered by the Mercedes-Benz Limited
Warranty.
Do not drive without sufficient amount
of coolant in the cooling system. The
engine will overheat, causing major en-
gine damage.