MERCEDES-BENZ C55AMG 2006 W203 Owner's Manual

370 Practical hints
What to do if …
Display symbolDisplay messagePossible cause/consequencePossible solution
ÑCruise contr.
Drive to workshopCruise control is malfunctioning.Visit an authorized Mercedes-Benz
Center.
GDisplay malfunction
Visit workshopThe 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 workshopCertain 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.
JDoors openYou are attempting to drive with one or
more doors open.Close the doors.

371 Practical hints
What to do if …
Display symbolDisplay messagesPossible cause/consequencePossible solution
NUSA only:
At next gas station
add 1.0 qt engine oil
Canada only:
At next gas station
add 1.0 l engine oil
The engine oil level is too low.Add engine oil (page 300) and check
the engine oil level (
page 299).
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 300) and check
the engine oil level (
page 299).
Engine oil level
Reduce oil levelYou 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 workshopIt may be that there is water in the engine
oil.Have the engine oil checked.

372 Practical hints
What 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 symbolDisplay messagesPossible cause/consequencePossible solution
NEngine oil level
Visit workshopThe engine oil has dropped to a critical
level.Check the engine oil level
(
page 299) and add oil as required
(
page 300).
If you must add engine oil frequently,
have the engine checked for possible
leaks.
Oil sensor malfunction
Visit workshopThe 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.

373 Practical hints
What to do if …
Display symbolDisplay messagePossible cause/consequencePossible solution
4Check gas cap.
See Operator’s ManualA 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 293).
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.
YHood openYou are attempting to drive with the hood
open.Close the hood (page 297).
IRemove key.You have forgotten to remove the
SmartKey.Remove the SmartKey from the starter
switch.
Replace key
Drive to workshopNo additional code available for
SmartKey.Change the SmartKey.

374 Practical hints
What to do if …
Display symbolDisplay messagePossible cause/consequencePossible solution
.3rd brake lampThe high mounted brake lamp is
malfunctioning. This message will only
appear if all light emitting diodes have
stopped working.Visit an authorized Mercedes-Benz
Center as soon as possible.
Backup lamp, leftThe left backup lamp is malfunctioning.Replace the bulb as soon as possible.
Backup lamp, rightThe right backup lamp is malfunctioning.Replace the bulb as soon as possible.
Brake lamp
Drive to workshopBrake lamp illumination is delayed or
lamp is permanently on.Visit an authorized Mercedes-Benz
Center as soon as possible.
Brake lamp leftThe left brake lamp is malfunctioning.Replace the bulb as soon as possible.
Brake lamp rightThe 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 leftThe left front fog lamp is malfunctioning.Visit an authorized Mercedes-Benz
Center as soon as possible.
Front foglamp rightThe right front fog lamp is malfunctioning.Visit an authorized Mercedes-Benz
Center as soon as possible.
Front left
side marker lampThe left front side marker lamp is
malfunctioning.Visit an authorized Mercedes-Benz
Center as soon as possible.
Front right
sider marker lampThe right front side marker lamp is
malfunctioning.Visit an authorized Mercedes-Benz
Center as soon as possible.

375 Practical hints
What to do if …
Display symbolDisplay messagePossible cause/consequencePossible solution
.High beam leftThe left high beam lamp is
malfunctioning.Replace the bulb as soon as possible.
High beam rightThe right high beam lamp is
malfunctioning.Replace the bulb as soon as possible.
License plate lamp,
leftThe left license plate lamp is
malfunctioning.Replace the bulb as soon as possible.
License plate lamp,
rightThe right license plate lamp is
malfunctioning.Replace the bulb as soon as possible.
Light sensor
Drive to workshopThe light sensor is malfunctioning.
The headlamps switch on automatically.In the control system, set lamp
operation to manual (
page 144).
Switch on the headlamps using the
exterior lamp switch (
page 114).
Visit an authorized Mercedes-Benz
Center as soon as possible.
Low beam leftThe 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.

376 Practical hints
What to do if …
Display symbolDisplay messagePossible cause/consequencePossible solution
.Low beam rightThe 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 frontThe left front parking lamp is
malfunctioning.Replace the bulb as soon as possible.
Parking lamp
right frontThe right front parking lamp is
malfunctioning.Replace the bulb as soon as possible.
Rear fog lamp
Substit. bulb onThe rear fog lamp is malfunctioning.
A substitute bulb is being used.Replace the bulb as soon as possible.
Switch off lightsHeadlamps have been turned on with the
driver’s door opened and the SmartKey
removed from the starter switch.Switch off the headlamps.
Taillamp left
Substit. bulb on

The left tail lamp is malfunctioning.
A substitute bulb is being used.Replace the bulb as soon as possible.
Taillamp right
Substit. bulb on

The right tail lamp is malfunctioning.
A substitute bulb is being used.Replace the bulb as soon as possible.

377 Practical hints
What to do if …
Display symbolDisplay messagePossible cause/consequencePossible solution
.Turn signal
left frontThe left front turn signal lamp is
malfunctioning.Replace the bulb as soon as possible.
Turn signal
right frontThe right front turn signal lamp is
malfunctioning.Replace the bulb as soon as possible.
Turn signal
left mirrorThe left turn signal in the side mirror is
malfunctioning. This message will only
appear if all light emitting diodes have
stopped working.Visit an authorized Mercedes-Benz
Center as soon as possible.
Turn signal
right mirrorThe right turn signal in the side mirror is
malfunctioning. This message will only
appear if all light emitting diodes have
stopped working.Visit an authorized Mercedes-Benz
Center as soon as possible.
Turn signal
left rear
Substit. bulb on

The left rear turn signal lamp is
malfunctioning.
A substitute bulb is being used.Replace the bulb as soon as possible.
Turn signal
right rear
Substit. bulb on

The right rear turn signal lamp is
malfunctioning.
A substitute bulb is being used.Replace the bulb as soon as possible.

378 Practical hints
What to do if …
Display symbolDisplay messagePossible cause/consequencePossible solution
<Belt system
Drive to workshopThe seat belt system is malfunctioning.Visit an authorized Mercedes-Benz
Center as soon as possible.
_Steering oil
Visit workshopThe steering gear oil level is too low.
There is a danger of steering gear
damage.Have the system checked by an
authorized Mercedes-Benz Center.
Warning!G
If the level of steering gear oil in reservoir is
too low, the steering power assistance could
fail. Much greater effort will then be needed
to turn the steering wheel.
Do not add steering oil without checking the
steering system.
Do not drive the vehicle. Have the system
checked at an authorized Mercedes-Benz
Center as soon as possible.

379 Practical hints
What to do if …
Display symbolDisplay messagePossible cause/consequencePossible solution
KClose slid./pop-up
sunroofYou have opened the driver’s door with
the SmartKey removed from the starter
switch and the sliding portion of the
tilt/sliding sunroof open.Close the tilt/sliding sunroof
(
page 242).
JClose slid./pop-up
sunroofYou have opened the driver’s door with
the SmartKey removed from the starter
switch and the tilting portion of the
tilt/sliding sunroof open.Close the tilt/sliding sunroof
(
page 242).
LTele Aid malfunction.
Drive to workshopOne or more main functions of the Tele
Aid system* are malfunctioning.Have the Tele Aid system* checked by
an authorized Mercedes-Benz Center.
tFunction unavailableThis display appears if buttont
ors on the multifunction steering
wheel is pressed and the vehicle is not
equipped with a telephone*.
ÊTrunk openYou are attempting to drive with the trunk
open.Close the trunk.
WWasher fluid
please refillThe fluid level has dropped to
about1/3of total reservoir capacity.
Add washer fluid (page 304).