2004 MERCEDES-BENZ CL500 warning

306 Practical hintsWhat to do if …?Display symbol
Display messages
Possible cause
Possible solution
?
VISIT WORKSHOP!
There may be a malfunction in the:

Fuel injection system


Ignition system


Exhaust system


Fuel system

Visit an authorized Mercedes-Benz
Center as soon as possible.
B
COOLANT
CHECK LEVEL!
The coolant level is too low.

Add coolant (
page 266).

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 a sufficient
amount of coolant in the cooling sys-
tem. The engine will overheat, causing
major engine damage.

307 Practical hints
What to do if …?
During severe operating conditions,
e.g. stop-and-go traffic, the coolant tem-
perature may rise close to 248°F (120°C).
Display symbol
Display messages
Possible cause
Possible solution
Ï
COOLANT
STOP, ENGINE OFF!
The coolant is too hot.

Stop the vehicle and turn off the engine.

Only start the engine again after the mes-
sage disappears. You could otherwise
damage the engine.
Warning!
G
Driving when your engine is badly overheat-
ed 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 the
engine has cooled down.
!The engine should not be operated with
the coolant temperature above 248°F
(120°C). Doing so may cause serious
engine damage which is not covered by
the Mercedes-Benz Limited Warranty.

311 Practical hints
What to do if …?
When the message
ADD 1.0 QT. ENGINE
OIL AT NEXT REFUELING!
(Canada:
1 Liter
) appears while the engine is run-
ning and at operating temperature, the en-
gine oil level has dropped to approximately
the minimum level.When this occurs, the warning will first
come on intermittently and then stay on if
the oil level drops further.
Visually check for oil leaks. If no obvious oil
leaks are noted, drive to the nearest ser-
vice station where the engine oil should be
topped to the required level with an ap-
proved oil.
Display symbol
Display message
Possible cause
Possible solution
:
ENGINE OIL
VISIT WORKSHOP!
It may be that there is water in the engine
oil.

Have the engine oil level checked
(page 262).
ENGINE OIL LEVEL
VISIT WORKSHOP!
The engine oil has dropped to a critical
level.

Check the engine oil level (
page 262)
and add engine oil as required
(
page 265).

If you must add engine oil frequently,
have the engine checked for possible
leaks.
ENGINE OIL SENSOR
VISIT WORKSHOP!
The measuring system is malfunctioning.

Have the measuring system checked by
an authorized Mercedes-Benz Center.
!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.

319 Practical hints
What to do if …?
Display symbol
Display messages
Possible cause
Possible solution
t

FUNCTION
NOT AVAILABLE!
This display appears if button t or
son the multifunction steering wheel
is pressed and the vehicle is not equipped
with a telephone.
Ê
TRUNK OPEN!
This message will appear whenever the
trunk lid is open.

Close the trunk lid.
W
WASHER FLUID
CHECK LEVEL!
The fluid level has dropped to about
1/3
of total reservoir capacity.
Add washer fluid (
page 269).
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 could be seriously burned.

320 Practical hintsWhat to do if …?Tire pressure monitor messages
(vehicles produced up to approximately
October 2003)Display symbol
Display message
Possible cause
Possible solution
H
TIRE PRES.

DISPLAY AFTER DRIVING
A FEW MINS. REACTIVATE
USING R-BUTTON
The tire pressure is being checked.
TIRE PRES. MONITOR
NOT ACTIVE
The tire inflation pressure monitor* is un-
able to monitor the tire pressure due to

the presence of several wheel sensors
in the vehicle.


excessive wheel sensor tempera-
tures.


a nearby radio interference source.


unrecognized wheel sensors mount-
ed.

Check the tire pressure at the next ser-
vice station.
Warning!
G
Do not drive with a flat tire. A flat tire affects
the ability to steer or brake the vehicle.
You may lose control of the vehicle. Contin-
ued driving with a flat tire will cause exces-
sive heat build-up and possibly a fire.

321 Practical hints
What to do if …?
Display symbol
Display message
Possible cause
Possible solution
H
TIRE PRES. MONITOR
REACTIVATE!
The tire inflation pressure monitor* is de-
activated.

Activate the tire inflation pressure mon-
itor* (
page 274).
TIRE PRES. MONITOR
VISIT WORKSHOP!
The tire inflation pressure monitor* is
malfunctioning.

Have the tire inflation pressure moni-
tor* checked by an authorized
Mercedes-Benz Center.

Change the wheel (
page 343).
A wheel without proper sensor was in-
stalled.

Check and correct tire pressure as re-
quired (
page 271).
TIRE PRES.
CAUTION, TIRE DEFECT!
One or more tires are deflating.

Carefully bring the vehicle to a halt,
avoiding abrubt steering and braking
maneuvers.

Change the wheel (
page 343).
TIRE PRES.
CHECK TIRES!
The tire pressure in one or more tires is
already below the minimum value.
The tire pressure in one or more tires is
low.

Carefully bring the vehicle to a halt,
avoiding abrubt steering and braking
maneuvers.

Change the wheel (
page 343).
Warning!
G
Do not drive with a flat tire. A flat tire affects
the ability to steer or brake the vehicle.
You may lose control of the vehicle. Contin-
ued driving with a flat tire will cause exces-
sive heat build-up and possibly a fire.

322 Practical hintsWhat to do if …?Display symbol
Display message
Possible cause
Possible solution
H
TIRE PRES., RF
CAUTION, TIRE DEFECT!
The right front tire is deflating.

Carefully bring the vehicle to a halt,
avoiding abrubt steering and braking
maneuvers.

Change the wheel (
page 343).
TIRE PRES., RF
CHECK TIRES!
The right front tire pressure is low.

Carefully bring the vehicle to a halt.

Check the tire pressure.

Change the wheel (
page 343).
TIRE PRES., LF
CAUTION, TIRE DEFECT!
The left front tire is deflating.

Carefully bring the vehicle to a halt,
avoiding abrupt steering and braking
maneuvers.

Change the wheel (
page 343).
TIRE PRES., LF
CHECK TIRES!
The left front tire pressure is low.

Carefully bring the vehicle to a halt.

Check the tire pressure.

Change the wheel (
page 343).
Warning!
G
Do not drive with a flat tire. A flat tire affects
the ability to steer or brake the vehicle.
You may lose control of the vehicle. Contin-
ued driving with a flat tire will cause exces-
sive heat build-up and possibly a fire.

323 Practical hints
What to do if …?
Display symbol
Display message
Possible cause
Possible solution
H
TIRE PRES., RR
CAUTION, TIRE DEFECT!
The right rear tire is deflating.

Carefully bring the vehicle to a halt,
avoiding abrubt steering and braking
maneuvers.

Change the wheel (
page 343).
TIRE PRES., RR
CHECK TIRES!
The right rear tire pressure is low.

Carefully bring the vehicle to a halt.

Check the tire pressure.

Change the wheel (
page 343).
TIRE PRES., LR
CAUTION, TIRE DEFECT!
The left rear tire is deflating.

Carefully bring the vehicle to a halt,
avoiding abrupt steering and braking
maneuvers.

Change the wheel (
page 343).
TIRE PRES., LR
CHECK TIRES!
The left rear tire pressure is low.

Carefully bring the vehicle to a halt.

Check the tire pressure.

Change the wheel (
page 343).
Warning!
G
Do not drive with a flat tire. A flat tire affects
the ability to steer or brake the vehicle.
You may lose control of the vehicle. Contin-
ued driving with a flat tire will cause exces-
sive heat build-up and possibly a fire.