Page 365 of 481
364 Practical hintsWhat to do if …?Display
Possible cause
Possible solution
Ï
COOLANT
STOP, ENGINE OFF
The poly-V-belt could be broken.
Stop the vehicle and immediately turn off
the engine.
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:
Restart the engine only after the message
disappears from the multifunction dis-
play. Doing so could result in serious en-
gine damage that is not covered by the
Mercedes-Benz Limited Warranty.
Observe the coolant temperature gauge
in the instrument cluster (
page 24).
Drive immediately to the nearest autho-
rized Mercedes-Benz Center. Adjust driv-
ing to be consistent with reduced braking
responsiveness.
Page 366 of 481
365 Practical hints
What to do if …?
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Ï
COOLANT
VISIT WORKSHOP
The cooling fan for the coolant is malfunc-
tioning.
Observe the coolant temperature display.
Have the fan replaced as soon as possi-
ble.
Î
CRUISE CONTROL
DRIVE TO WORKSHOP
Cruise control or Distronic* is malfunc-
tioning.
Have cruise control or Distronic*
checked by an authorized Mercedes-Benz
Center.
G
DISPLAY DEFECTIVE
VISIT WORKSHOP
The instrument cluster display is malfunc-
tioning.
Continue driving with added caution.
Visit an authorized Mercedes-Benz Cen-
ter as soon as possible.
±
DISPLAY DEFECTIVE
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
DOOR OPEN
You are attempting to drive with one or
more doors open.
Close the doors.
Page 367 of 481
366 Practical hintsWhat to do if …?Display
Possible cause
Possible solution
:
ADD 1.0 QT. OIL
AT FILLING STATION(Canada:
1.0 LITER
)
The engine oil level is too low.
Add engine oil (
page 292) and check
the engine oil level (page 289).
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 292) and check
the engine oil level (page 289).
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 excess oil siphoned or drained off.
Observe all legal requirements with re-
spect to its disposal.
Page 368 of 481
367 Practical hints
What to do if …?
When the message:ADD 1.0 QT. OIL
AT FILLING STATION(Canada:
1.0 LITER
)
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 ser-
vice station where the engine oil should be
topped to the required level with an ap-
proved oil specified in the Factory Ap-
proved Service Products pamphlet.
Display
Possible cause
Possible solution
:
ENGINE OIL LEVEL
VISIT WORKSHOP
The engine oil has dropped to a critical
level.
Check the engine oil level (
page 289)
and add engine oil as required
(
page 292).
If you must add engine oil frequently,
have the engine checked for possible
leaks.
There is water in the engine oil.
Have the engine oil checked.
OIL SENSOR MALFUNCT.
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.
Page 369 of 481
368 Practical hintsWhat to do if …?Display
Possible cause
Possible solution
_
ENTRY POSITION
DO NOT DRIVE
Seat, exterior mirrors and steering wheel
have not yet moved to their preset driving
positions.
Wait until the seat, exterior mirrors and
steering wheel have moved to their driv-
ing positions.
The message will disappear.
Y
HOOD OPEN
You are driving with the hood open.
Close the hood (
page 288).
I
REMOVE KEY
You have forgotten to remove the
SmartKey.
Remove the SmartKey from the starter
switch.
REPLACE KEY
DRIVE TO WORKSHOP
The SmartKey is malfunctioning.
Visit an authorized Mercedes-Benz Cen-
ter as soon as possible.
AUTOMATIC LIGHT ON
REMOVE KEY
SmartKey in starter switch position 1
or2.
Remove the SmartKey from the starter
switch.
KEY
CHECK BATTERY
The battery in the KEYLESS-GO* key is
discharged.
Replace the battery (
page 392).
KEY
NOT RECOGNIZED
SmartKey with KEYLESS-GO* is not rec-
ognized 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.
Search for the SmartKey.
Otherwise the vehicle cannot be centrally
locked nor can the engine be started again
after it has been stopped.
Page 370 of 481
369 Practical hints
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F
KEY
NOT RECOGNIZED
The SmartKey with KEYLESS-GO* is mo-
mentarily not recognized.
Change the position of the SmartKey with
KEYLESS-GO* in the vehicle.
Operate the vehicle with the SmartKey in
the starter switch if necessary.
KEY
STILL IN VEHICLE
A SmartKey with KEYLESS-GO* left in the
vehicle was recognized while locking the
vehicle from the outside.
Take the SmartKey with KEYLESS-GO*
out of the vehicle.
KEY
DRIVE TO WORKSHOP
The KEYLESS-GO* system is malfunction-
ing.
Visit an authorized Mercedes-Benz Cen-
ter as soon as possible.
.
3RD BRAKE LIGHT
CHECK LIGHT
The high mounted brake lamp is malfunc-
tioning.
Visit an authorized Mercedes-Benz Cen-
ter as soon as possible.
STOP LIGHT
VISIT WORKSHOP
Brake lamp illumination is delayed or
lamp is permanently on.
Visit an authorized Mercedes-Benz Cen-
ter as soon as possible.
BRAKE LIGHT LEFT
CHECK LIGHT
SUBSTITUTE LAMP ON
The left brake lamp is malfunctioning. A
substitute bulb is being used.
Visit an authorized Mercedes-Benz Cen-
ter as soon as possible.
BRAKE LIGHT RIGHT
CHECK LIGHT
SUBSTITUTE LAMP ON
The right brake lamp is malfunctioning. A
substitute bulb is being used.
Visit an authorized Mercedes-Benz Cen-
ter as soon as possible.
DISPLAY DEFECTIVE
VISIT WORKSHOP
The display for the lamps or the system is
malfunctioning.
Visit an authorized Mercedes-Benz Cen-
ter as soon as possible.
Page 371 of 481
370 Practical hintsWhat to do if …?Display
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Possible solution
.
FRONT FOGLAMP, LEFT
CHECK LIGHT
The left front fog lamp is malfunctioning.
Visit an authorized Mercedes-Benz Cen-
ter as soon as possible.
FRONT FOGLAMP, RIGHT
CHECK LIGHT
The right front fog lamp is malfunctioning.
Visit an authorized Mercedes-Benz Cen-
ter as soon as possible.
HIGH BEAM, LEFT
CHECK LIGHT
The left high beam lamp is malfunction-
ing.
Replace the bulb as soon as possible.
HIGH BEAM, RIGHT
CHECK LIGHT
The right high beam lamp is malfunction-
ing.
Replace the bulb as soon as possible.
LICENSE PLATE L, L
CHECK LIGHT
The left license plate lamp is malfunction-
ing.
Replace the bulb as soon as possible.
LICENSE PLATE L, R
CHECK LIGHT
The right license plate lamp is malfunc-
tioning.
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 165).
Switch on headlamps using the exterior
lamp switch.
Visit an authorized Mercedes-Benz
Center as soon as possible.
Page 372 of 481
371 Practical hints
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Possible cause
Possible solution
.
LOW BEAM, LEFT
CHECK LIGHT
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
CHECK LIGHT
The right low beam lamp is malfunction-
ing.
Halogen headlamp:
Replace the bulb as soon as possible.
Bi-Xenon* headlamp:
Visit an authorized Mercedes-Benz
Center as soon as possible.
MARKER LIGHT, FL
CHECK LIGHT
The front left side marker lamp is mal-
functioning.
Replace the bulb as soon as possible.
MARKER LIGHT, FR
CHECK LIGHT
The front right side marker lamp is mal-
functioning.
Replace the bulb as soon as possible.
REAR FOGLIGHT
CHECK LIGHT
The rear fog lamp is malfunctioning.
Replace the bulb as soon as possible.
REVERSE LIGHT, LEFT
CHECK LIGHT
The left reverse lamp is malfunctioning.
Replace the bulb as soon as possible.
REVERSE LIGHT, RIGHT
CHECK LIGHT
The right reverse lamp is malfunctioning.
Replace the bulb as soon as possible.
