MERCEDES-BENZ C COUPE 2005 CL203 Owner's Manual

360 Practical hintsWhat to do if …
During severe operating conditions and
stop-and-go city traffic, the coolant tem-
perature may rise close to 248°F (120°C).
Display symbol
Display message
Possible cause
Possible solution
•
Coolant
Stop, engine off!
The coolant is too hot.

Stop the vehicle and turn off the
engine.

Only start the engine again after the
message disappears. You could
otherwise damage the engine.
Warning!
G
Driving when your engine is badly over-
heated 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 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.

361 Practical hints
What to do if …
Display symbol
Display message
Possible cause
Possible solution
•
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. Notify 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.

Observe the coolant temperature gauge
(page 24).

Drive immediately to the nearest
authorized Mercedes-Benz Center.
Coolant
Visit workshop.
The cooling fan for the coolant is
malfunctioning.

Observe the coolant temperature gauge.

Have the fan replaced as soon as
possible.

362 Practical hintsWhat to do if …Display symbol
Display message
Possible cause
Possible solution
Ñ
Cruise contr.
Drive to workshop
Cruise control is malfunctioning.

Visit an authorized Mercedes-Benz
Center.
G
Display malfunction.
Visit workshop.
The instrument cluster display is
malfunctioning.

Continue driving with added caution.

Visit an authorized Mercedes-Benz
Center as soon as possible.
The displays for several systems have
malfunctioned. Some systems them-
selves may also have malfunctioned.

Have the electronic systems checked
by an authorized Mercedes-Benz
Center.
±
Display malfunction.
Visit workshop.
Certain electronic systems are unable to
relay information to the control system.
The following systems may have failed:

Coolant temperature display


Tachometer


Cruise control display

Have the electronic systems checked
by an authorized Mercedes-Benz
Center.
J
Doors open
You are attempting to drive with one or
more doors open.

Close the doors.

363 Practical hints
What to do if …
Display symbol
Display messages
Possible cause
Possible solution
:
USA only:At next gas station
add 1.0 qt engine oilCanada only:At next gas station
add 1.0 l engine oil
The engine oil level is too low.

Add engine oil (
page 294) and check
the engine oil level (
page 293).
Engine oil level
Stop, engine off!
There is no oil in the engine. There is a
danger of engine damage.

Carefully bring the vehicle to a halt as
soon as possible.

Turn off the engine.

Add engine oil (
page 294) and check
the engine oil level (
page 293).
Engine oil level
Reduce oil level
You have added too much engine oil.
There is a risk of damaging the engine or
the catalytic converter.

Have oil siphoned or drained off.
Observe all legal requirements with
respect to its disposal.
Change engine oil
Visit workshop.
It may be that there is water in the engine
oil.

Have the engine oil checked.

364 Practical hintsWhat to do if …When the message
At next gas station
add 1.0 qt engine oil
(Canada:
1.0 l
)
appears while the engine is running and at
operating temperature, the engine oil level
has dropped to approximately the mini-
mum 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
service station where the engine oil should
be topped to the required level with an
approved oil specified in the Factory
Approved Service Products pamphlet.
Display symbol
Display messages
Possible cause
Possible solution
:
Engine oil level
Visit workshop.
The engine oil has dropped to a critical
level.

Check the engine oil level
(page 294) and add oil as required
(page 293).

If you must add engine oil frequently,
have the engine checked for possible
leaks.
Oil sensor malfunction
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.

365 Practical hints
What to do if …
Display symbol
Display message
Possible cause
Possible solution
4
Check gas cap.
See Operator’s Manual
A loss of pressure has been detected in
the fuel system. The fuel cap may not be
closed properly or the fuel system may be
leaky.

Check the fuel cap (
page 288).
If it is not closed properly:

Close the fuel cap.
If it is closed properly:

Have the fuel system checked by an
authorized Mercedes-Benz Center.
Y
Hood open
You are driving with the hood open.

Close the hood (
page 292).
I
Remove key.
You have forgotten to remove the
SmartKey.

Remove the SmartKey from the starter
switch.
Replace key
Drive to workshop
No additional code available for SmartKey.

Change the SmartKey.

366 Practical hintsWhat to do if …Display symbol
Display message
Possible cause
Possible solution
.
3rd brake lamp
The high mounted brake lamp is
malfunctioning. This message will only
appear if all LEDs have stopped working.

Visit an authorized Mercedes-Benz
Center as soon as possible.
Backup lamp, left
The left backup lamp is malfunctioning.

Replace the bulb as soon as possible.
Backup lamp, right
The right backup lamp is malfunctioning.

Replace the bulb as soon as possible.
Brake lamp
Drive to workshop
Brake lamp illumination is delayed or
lamp is permanently on.

Visit an authorized Mercedes-Benz
Center as soon as possible.
Brake lamp left
The left brake lamp is malfunctioning.

Replace the bulb as soon as possible.
Brake lamp right
The right brake lamp is malfunctioning.

Replace the bulb as soon as possible.
Display malfunction.
Visit workshop
The display for the lamps or the system is
malfunctioning.

Visit an authorized Mercedes-Benz
Center as soon as possible.
Front foglamp left
The left front fog lamp is malfunctioning.

Visit an authorized Mercedes-Benz
Center as soon as possible.
Front foglamp right
The right front fog lamp is malfunctioning.

Visit an authorized Mercedes-Benz
Center as soon as possible.
Front left
side marker lamp
The left front side marker lamp is
malfunctioning.

Replace the bulb as soon as possible.
Front right
side marker lamp
The right front side marker lamp is
malfunctioning.

Replace the bulb as soon as possible.

367 Practical hints
What to do if …
Display symbol
Display message
Possible cause
Possible solution
.
High beam left
The left high beam lamp is
malfunctioning.

Replace the bulb as soon as possible.
High beam right
The right high beam lamp is
malfunctioning.

Replace the bulb as soon as possible.
License plate lamp,
left
The left license plate lamp is
malfunctioning.

Replace the bulb as soon as possible.
License plate lamp,
right
The right license plate lamp is
malfunctioning.

Replace the bulb as soon as possible.
Light sensor
Drive to workshop
The lamp sensor is malfunctioning.
The headlamps switch on automatically.

In the control system, set lamp
operation to manual (
page 133).

Switch on headlamps using the
exterior lamp switch (
page 51).

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

368 Practical hintsWhat to do if …Display symbol
Display message
Possible cause
Possible solution
.
Low beam left
The left low beam lamp is malfunctioning.
Halogen headlamp:
Replace the bulb as soon as possible.
Bi-Xenon* headlamp:

Visit an authorized Mercedes-Benz
Center as soon as possible.
Low beam right
The right low beam lamp is
malfunctioning.
Halogen headlamp:
Replace the bulb as soon as possible.
Bi-Xenon* headlamp:

Visit an authorized Mercedes-Benz
Center as soon as possible.
Parking lamp
left front

The left parking lamps are
malfunctioning. A substitute bulb is being
used.

Replace the bulb as soon as possible.
Parking lamp

right front

The right parking lamps are
malfunctioning. A substitute bulb is being
used.

Replace the bulb as soon as possible.
Rear fog lamp
Substitute bulb on
The rear fog lamp is malfunctioning.

Replace the bulb as soon as possible.

369 Practical hints
What to do if …
Display symbol
Display message
Possible cause
Possible solution
.
Switch off lights.
This display appears if the driver’s door is
opened and no SmartKey is in the starter
switch.

Switch off the headlamps.
Taillamp left
Substitute bulb on

The left tail lamp is malfunctioning.
A substitute bulb is being used.

Replace the bulb as soon as possible.
Taillamp right
Substitute bulb on

The right tail lamp is malfunctioning.
A substitute bulb is being used.

Replace the bulb as soon as possible.
Turn signal
left front
The left front turn signal lamp is
malfunctioning.

Replace the bulb as soon as possible.
Turn signal
right front
The right front turn signal lamp is
malfunctioning.

Replace the bulb as soon as possible.