2007 MERCEDES-BENZ CLK350 COUPE Owner's Manual

384 Practical hints
What to do if …?
When the message Check oil level at
next refueling
appears while the engine
is running and at operating temperature,
the engine 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
approved oil specified in the Factory
Approved Service Products pamphlet.
Display symbolDisplay messagePossible cause/consequencePossible solution
:Check oil level
at next refuelingThe engine oil level has dropped to a
critical level.Check the engine oil level
(
page 308) and add oil as required
(
page 309).
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.

385 Practical hints
What to do if …?
Display symbolDisplay messagePossible cause/consequencePossible solution
A Reserve fuelThe fuel level has dropped below the re-
serve mark.Refuel at the next gas station
(
page 303).
I Remove keyYou have forgotten to remove the
SmartKey.Remove the SmartKey from the start-
er switch.
Replace keyNo additional code available for SmartKey
or SmartKey with KEYLESS-GO*Contact an authorized Mercedes-Benz
Center as soon as possible.
Change
key batteriesThe SmartKey with KEYLESS-GO* batter-
ies are discharged.Change the batteries (page 404).
Key
not detectedThe SmartKey with KEYLESS-GO* is not
recognized while the engine is running be-
cause

the SmartKey is not in the vehicle

there is strong radio-frequency inter-
ference
Stop the vehicle as soon as it is safe to
do so.
Apply the parking brake (page 59).
Search for the SmartKey.
Otherwise the vehicle cannot be centrally
locked nor can the engine be started
again after the engine has been stopped.
The SmartKey with KEYLESS-GO* is mo-
mentarily not recognized.Change the position of the SmartKey
in the vehicle.
Operate the vehicle with the SmartKey
in the starter switch if necessary.

386 Practical hints
What to do if …?
Display symbolDisplay messagePossible cause/consequencePossible solution
I Keyless Go
Check systemThe KEYLESS-GO* system is malfunction-
ing.Contact an authorized Mercedes-Benz
Center as soon as possible.
Key detected
in vehicleA SmartKey with KEYLESS-GO* left in the
vehicle was recognized while locking the
vehicle from the outside.Take the SmartKey out of the vehicle.
Please do not
forget keyThis display appears (for a maximum of
60 seconds) if the driver’s door is opened
with the engine shut off and no SmartKey
in the starter switch.
Message is only a reminder.Insert SmartKey in the starter switch.
Take the SmartKey with
KEYLESS-GO* with you when leaving
the vehicle.
. Active headlamps
inoperativeThe Bi-Xenon cornering lamps system is
malfunctioning.Contact an authorized Mercedes-Benz
Center as soon as possible.
Active headlamps
Auxiliary bulb onThe active headlamps are malfunctioning.
Another light is being used.Contact an authorized Mercedes-Benz
Center as soon as possible.
AUTO-Light
inoperativeThe light sensor is malfunctioning. The
headlamps switch on automatically.In the control system, set lamp opera-
tion to manual mode (
page 158).
Switch on headlamps using the exteri-
or lamp switch.
Contact an authorized Mercedes-Benz
Center as soon as possible.

387 Practical hints
What to do if …?
Display symbolDisplay messagePossible cause/consequencePossible solution
. 3rd brake lampThe high mounted brake lamp is malfunc-
tioning.Contact an authorized Mercedes-Benz
Center as soon as possible.
Brake lamp
left sideThe left brake lamp is malfunctioning.Replace the bulb as soon as possible
(
page 411).
Brake lamp
right sideThe right brake lamp is malfunctioning.Replace the bulb as soon as possible
(
page 411).
Front foglamp
left sideThe left front fog lamp is malfunctioning.Contact an authorized Mercedes-Benz
Center as soon as possible.
Front foglamp
right sideThe right front fog lamp is malfunctioning.Contact an authorized Mercedes-Benz
Center as soon as possible.
Front left
turn signalThe left front turn signal lamp is malfunc-
tioning.Replace the bulb as soon as possible
(
page 410).
Front right
turn signalThe right front turn signal lamp is malfunc-
tioning.Replace the bulb as soon as possible
(
page 410).
High beam
left sideThe left high beam lamp is malfunction-
ing.Replace the bulb as soon as possible
(
page 409).
High beam
right sideThe right high beam lamp is malfunction-
ing.Replace the bulb as soon as possible
(
page 409).

388 Practical hints
What to do if …?
Display symbolDisplay messagePossible cause/consequencePossible solution
. License plate lamp
left sideThe left license plate lamp is malfunction-
ing.Replace the bulb as soon as possible
(
page 412).
License plate lamp
right sideThe right license plate lamp is malfunc-
tioning.Replace the bulb as soon as possible
(
page 412).
Low beam
left sideThe left low beam lamp is malfunctioning.Halogen headlamp:
Replace the bulb as soon as possible
(
page 409).
Bi-Xenon* headlamp:
Contact an authorized Mercedes-Benz
Center as soon as possible.
Low beam
right sideThe right low beam lamp is malfunction-
ing.Halogen headlamp:
Replace the bulb as soon as possible
(
page 409).
Bi-Xenon* headlamp:
Contact an authorized Mercedes-Benz
Center as soon as possible.
Parking lamp
front left

The left front parking lamp is
malfunctioning. Replace the bulb as soon as possible
(
page 410).
Parking lamp
front right

The right front parking lamp is
malfunctioning.Replace the bulb as soon as possible
(
page 410).

389 Practical hints
What to do if …?
Display symbolDisplay messagePossible cause/consequencePossible solution
. Rear foglamp
Substitute bulb on

The foglamp is malfunctioning. A back-up
bulb is being used.Replace the bulb as soon as possible
(
page 411).
Reverse lamp
left sideThe left backup lamp is malfunctioning.Replace the bulb as soon as possible
(
page 411).
Reverse lamp
right sideThe right backup lamp is malfunctioning.Replace the bulb as soon as possible
(
page 411).
Side marker lamp
front leftThe front left side marker lamp is malfunc-
tioning.Contact an authorized Mercedes-Benz
Center as soon as possible.
Side marker lamp
front rightThe front right side marker lamp is mal-
functioning.Contact an authorized Mercedes-Benz
Center as soon as possible.
Tail lamp
left
Substitute bulb on

The left tail lamp is malfunctioning. A
back-up bulb is being used.Replace the bulb as soon as possible
(
page 411).
Tail lamp
right
Substitute bulb on

The right tail lamp is malfunctioning. A
back-up bulb is being used.Replace the bulb as soon as possible
(
page 411).
Turn off lampsYou have removed the SmartKey from the
starter switch, opened the driver’s door
and left the headlamps on or removed the
SmartKey with KEYLESS-GO* from the ve-
hicle and left the headlamps on.Switch off the headlamps.

390 Practical hints
What to do if …?
Display symbolDisplay messagePossible cause/consequencePossible solution
. Turn signal,
left mirrorThe turn signal in the left exterior rear
view mirror is malfunctioning. This mes-
sage will only appear if a critical number
of LEDs have stopped working.Contact an authorized Mercedes-Benz
Center as soon as possible.
Turn signal,
right mirrorThe turn signal in the right exterior rear
view mirror is malfunctioning. This mes-
sage will only appear if a critical number
of LEDs have stopped working.Contact an authorized Mercedes-Benz
Center as soon as possible.
Turn signal
rear left
Substitute bulb on

The left rear turn signal lamp is malfunc-
tioning. A back-up bulb is being used.Replace the bulb as soon as possible
(
page 411).
Turn signal
rear right
Substitute bulb on

The right rear turn signal lamp is malfunc-
tioning. A back-up bulb is being used.Replace the bulb as soon as possible
(
page 411).

391 Practical hints
What to do if …?
Display symbolDisplay messagePossible cause/consequencePossible solution
1Restraint system
malfunction
Visit workshopThe system is malfunctioning.Drive with added caution to the near-
est authorized Mercedes-Benz Center.
Warning!G
In the event a malfunction of the SRS is indi-
cated as outlined above, the SRS may not be
operational.
For your safety, we strongly recommend
that you visit an authorized Mercedes-Benz
Center immediately to have the system
checked; otherwise the SRS may not be de-
ploy when needed in an accident, which
could result in serious or fatal injury, or it
might deploy unexpectedly and unnecessar-
ily which could also result in injury.