MERCEDES-BENZ C300 4MATIC 2008 W204 Owner's Manual

410 Practical hints
What to do if …?
Display Possible cause/consequencePossible solution
.Check Left
Cornering LightThe left-hand corner-illuminating lamp is
malfunctioning.Contact an authorized Mercedes-Benz
Center as soon as possible.
Check Right
Cornering LightThe right-hand corner-illuminating lamp is
malfunctioning.Contact an authorized Mercedes-Benz
Center as soon as possible.
Check
Left Fog LampThe left front fog lamp is malfunctioning.Contact an authorized Mercedes-Benz Cen-
ter as soon as possible.
Check
Right Fog LampThe right front fog lamp is malfunctioning.Contact an authorized Mercedes-Benz Cen-
ter as soon as possible.
Check
Rear Left
Fog LampThe left rear fog lamp is malfunctioning.Contact an authorized Mercedes-Benz Cen-
ter as soon as possible.
Check
Left High BeamThe left high beam lamp is malfunctioning.Replace the bulb as soon as possible
(
page 433).
Check
Right High BeamThe right high beam lamp is malfunctioning.Replace the bulb as soon as possible
(
page 433).

411 Practical hints
What to do if …?
Display Possible cause/consequencePossible solution
.Check Left
License Plate LampThe left license plate lamp is malfunction-
ing.Contact an authorized Mercedes-Benz Cen-
ter as soon as possible.
Check Right
License Plate LampThe right license plate lamp is malfunction-
ing.Contact an authorized Mercedes-Benz Cen-
ter as soon as possible.
Check
Left Low BeamThe left low beam lamp is malfunctioning.Contact an authorized Mercedes-Benz Cen-
ter as soon as possible.
Check
Right Low BeamThe right low beam lamp is malfunctioning.Contact an authorized Mercedes-Benz Cen-
ter as soon as possible.
Check
Front Left
Parking LampThe left front parking lamp is malfunction-
ing.Contact an authorized Mercedes-Benz Cen-
ter as soon as possible.
Check
Front Right
Parking LampThe right front parking lamp is malfunction-
ing.Contact an authorized Mercedes-Benz Cen-
ter as soon as possible.
Check
Left Reverse LampThe left reverse lamp is malfunctioning.Contact an authorized Mercedes-Benz Cen-
ter as soon as possible.
Check
Right Reverse LampThe right reverse lamp is malfunctioning.Contact an authorized Mercedes-Benz Cen-
ter as soon as possible.

412 Practical hints
What to do if …?
Display Possible cause/consequencePossible solution
.Check
Front Left
Side Marker LampThe front left side marker lamp is malfunc-
tioning.Contact an authorized Mercedes-Benz Cen-
ter as soon as possible.
Check
Front Right
Side Marker LampThe front right side marker lamp is malfunc-
tioning.Contact an authorized Mercedes-Benz Cen-
ter as soon as possible.
Check
Rear Left
Side Marker LampThe rear left side marker lamp is malfunc-
tioning.Contact an authorized Mercedes-Benz Cen-
ter as soon as possible.
Check
Rear Right
Side Marker LampThe rear right side marker lamp is malfunc-
tioning.Contact an authorized Mercedes-Benz Cen-
ter as soon as possible.
Check Left
Tail and Brake
LampsThe left tail lamp/brake lamp is malfunc-
tioning.Contact an authorized Mercedes-Benz Cen-
ter as soon as possible.
Check Right
Tail and Brake
LampsThe right tail lamp/brake lamp is malfunc-
tioning.Contact an authorized Mercedes-Benz Cen-
ter as soon as possible.

413 Practical hints
What to do if …?
Display Possible cause/consequencePossible solution
.Check Left
Tail LampThe left tail lamp is malfunctioning.Contact an authorized Mercedes-Benz Cen-
ter as soon as possible.
Check Right
Tail LampThe right tail lamp is malfunctioning.Contact an authorized Mercedes-Benz Cen-
ter as soon as possible.
Check
Front Left
Turn SignalThe left front turn signal lamp is malfunc-
tioning.Contact an authorized Mercedes-Benz Cen-
ter as soon as possible.
Check
Front Right
Turn SignalThe right front turn signal lamp is malfunc-
tioning.Contact an authorized Mercedes-Benz Cen-
ter as soon as possible.
Check
Rear Left
Turn SignalThe left rear turn signal lamp is malfunction-
ing.Contact an authorized Mercedes-Benz Cen-
ter as soon as possible.
Check
Rear Right
Turn SignalThe right rear turn signal lamp is malfunc-
tioning.Contact an authorized Mercedes-Benz Cen-
ter as soon as possible.

414 Practical hints
What to do if …?
Display Possible cause/consequencePossible solution
.Check
Left Mirror
Turn SignalThe turn signal in the left exterior rear view
mirror is malfunctioning. This message will
only appear if all light emitting diodes have
stopped working.Have the LEDs replaced as soon as possible.
Check
Right Mirror
Turn SignalThe turn signal in the right exterior rear view
mirror is malfunctioning. This message will
only appear if all light emitting diodes have
stopped working.Have the LEDs replaced as soon as possible.
Switch Off LightsYou are getting out of the vehicle and the
lights are still switched on.Switch off the headlamps (page 108).
Turn Lights Off
Or
Remove KeyThe exterior lamp switch is set to * and
you have forgotten to take out the
SmartKey. The parking lamps remain
switched on.Switch off the headlamps (page 108).
or
Remove the SmartKey from the starter
switch.

415 Practical hints
What to do if …?
When the message Check Engine Oil At
Next Refueling
appears while the engine
is running and at operating temperature,
the engine oil level has dropped to approx-
imately 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, continue to drive to the
nearest service station where the engine
oil should be topped to the required level
with an approved oil specified in the Facto-
ry Approved Service Products pamphlet.
For information on approved engine oils,
refer to the Factory Approved Service
Products pamphlet (USA only) or contact
an authorized Mercedes-Benz Center.
Display Possible cause/consequencePossible solution
ùCheck
Engine Oil
At Next RefuelingThe engine oil level has dropped to approx-
imately the minimum level.Check the engine oil level (page 327) and
add engine oil as required (
page 328).
If you must add engine oil frequently, have
the engine checked for possible leaks.
!The engine oil level warnings should not be
ignored. Extended driving with the symbol dis-
played could result in serious engine damage
that is not covered by the Mercedes-Benz Limit-
ed Warranty.

416 Practical hints
What to do if …?
Display Possible cause/consequencePossible solution
=SRS Malfunction
Service RequiredThere is a malfunction in the supplemental
restraint systems. The air bags or emergen-
cy tensioning devices (ETDs) could deploy
unexpectedly or fail to activate in an acci-
dent.Drive with added caution to the nearest
authorized Mercedes-Benz Center.
Front Left SRS
Malfunction
Service RequiredComponents of the driver’s supplemental
restraint system may not work properly.Drive with added caution to the nearest au-
thorized Mercedes-Benz Center.
Front Right SRS
Malfunction
Service RequiredComponents of the front passenger’s sup-
plemental restraint system may not work
properly.Drive with added caution to the nearest au-
thorized Mercedes-Benz Center.
Rear Left SRS
Malfunction
Service RequiredComponents of the left rear passenger’s
supplemental restraint system may not
work properly.Drive with added caution to the nearest au-
thorized Mercedes-Benz Center.
Warning!G
In the event that a malfunction of the SRS is
indicated as outlined above, the SRS may
not be operational. For your safety, we
strongly recommend that you contact an
authorized Mercedes-Benz Center
immediately to have the system checked;
otherwise the SRS may not be deployed
when needed in an accident, which could re-
sult in serious or fatal injury, or it might de-
ploy unexpectedly and unnecessarily which
could result in an accident and/or injury to
you or to others.

417 Practical hints
What to do if …?
Display Possible cause/consequencePossible solution
=Rear Center SRS
Malfunction
Service RequiredComponents of the center rear passenger’s
supplemental restraint system may not
work properly.Drive with added caution to the nearest au-
thorized Mercedes-Benz Center.
Rear Right SRS
Malfunction
Service RequiredComponents of the right rear passenger’s
supplemental restraint system may not
work properly.Drive with added caution to the nearest au-
thorized Mercedes-Benz Center.
Left Side Curtain
Airbag Malfunction
Service RequiredThe left side window curtain air bag may not
work properly.Drive with added caution to the nearest au-
thorized Mercedes-Benz Center.
Right Side Curtain
Airbag Malfunction
Service RequiredThe right side window curtain air bag may
not work properly.Drive with added caution to the nearest au-
thorized Mercedes-Benz Center.
Warning!G
In the event that a malfunction of the SRS is
indicated as outlined above, the SRS may
not be operational. For your safety, we
strongly recommend that you contact an
authorized Mercedes-Benz Center
immediately to have the system checked;
otherwise the SRS may not be deployed
when needed in an accident, which could re-
sult in serious or fatal injury, or it might de-
ploy unexpectedly and unnecessarily which
could result in an accident and/or injury to
you or to others.

418 Practical hints
What to do if …?
Display Possible cause/consequencePossible solution
LTele Aid
InoperativeOne or more main functions of the Tele Aid*
system are malfunctioning.Have the Tele Aid* system checked at an au-
thorized Mercedes-Benz Center.
HCorrect
Tire Pressure
(USA only)
The tire pressure is too low in one or more
tires.Check and correct tire inflation pressure as
required (
page 339).
Tire Press. Warning
Caution
Tire Malfunction
(USA only)
One or more tires are deflating.Carefully bring the vehicle to a halt, avoiding
abrupt steering and braking maneuvers.
If necessary, change the wheel (page 440).
Check
Tire Pressure
(USA only)
The tire pressure in one or more tires is al-
ready below the minimum value.Carefully bring the vehicle to a halt, avoiding
abrupt steering and braking maneuvers.
Check and adjust tire pressure as required
(
page 339).
If necessary, change the wheel (page 440).
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. Continued
driving with a flat tire will cause excessive
heat build-up and possibly a fire.

419 Practical hints
What to do if …?
Display Possible cause/consequencePossible solution
ÊYou are driving with the trunk open.Close the trunk (page 270).
WCheck
Washer FluidThe water level has dropped to approx.
1.1 US qts (1.0 l).Add washer fluid (page 330).