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iAfter 60 seconds with an unfastened seat belt the warning chime stops sounding and the
seat belt telltale illuminates continuously. The seat belt telltale will only go out if both, the
driver and front passenger’s seat belt are fastened, or the vehicle is standing still and a front
door is opened.ProblemPossible causes/consequences and M Solutions+The red SRS
indicator lamp
comes on while
driving.There is a malfunction in the restraint systems. The air bags or
Emergency Tensioning Devices (ETDs) could deploy unexpectedly
or fail to activate in an accident.XDrive with added caution to the nearest authorized Mercedes-
Benz Center.GWarning!
In the event 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
activated when needed in an accident, which
could result in serious or fatal injury, or it
might deploy unexpectedly and unnecessarily
which could also result in injury.ProblemPossible causes/consequences and M SolutionsdThe yellow ESP ®
warning lamp
comes on while
the engine is
running.The ESP ®
has been switched off.
Risk of accident!
When the ESP ®
is switched off it will not stabilize the vehicle if the
system recognizes that the vehicle starts to skid or that a wheel
is spinning.XSwitch the ESP ®
back on.
Exceptions: ( Y page 54).XIf leaving the ESP ®
switched off, adapt your speed and driving
to the prevailing road and weather conditions.XIf the ESP ®
cannot be switched back on: Have the system
checked at an authorized Mercedes-Benz Center as soon as
possible.You have engaged the differential locks. The ABS, BAS, EBB,
ESP ®
, and 4-ETS are switched off.XThe driving systems will switch on again after the differential
locks have been disengaged.What to do if …223Practical hints463_AKB; 3; 35, en-USd2ureepe,Version: 2.11.8.12009-07-16T20:59:56+02:00 - Seite 223Z
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ProblemPossible causes/consequences and M SolutionsdThe yellow ESP ®
warning lamp
flashes while
driving.The ESP ®
or the 4-ETS has come into operation because of
detected traction loss in at least one tire.XWhen driving off, apply as little throttle as possible.XWhile driving, ease up on the accelerator pedal.XAdapt your speed and driving to the prevailing road and weather
conditions.XDo not deactivate the ESP ®
.
Exceptions: ( Y page 54).
Failure to follow these instructions increases the risk of an
accident.
Vehicle
ProblemPossible causes/consequences and M SolutionsThe yellow fuel tank
reserve warning lamp in
the fuel gauge comes
on while driving.The fuel level has gone below the reserve mark.XRefuel at the next gas station.The yellow fuel tank
reserve warning lamp in
the fuel gauge comes
on when the engine is
running.The fuel cap is not closed properly.XClose the fuel cap.224What to do if …Practical hints
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EngineProblemPossible causes/consequences and M Solutions= (USA only)
; (Canada only)
The yellow engine
malfunction indicator
lamp comes on when
the engine is running.There may be a malfunction in
R the fuel management system
R the ignition system
R the emission control system
R systems which affect emissions
Such malfunctions may result in excessive emissions values and
may switch the engine to limp-home (emergency operation) mode.XHave the vehicle checked as soon as possible at an authorized
Mercedes-Benz Center.= (USA only)
; (Canada only)
The yellow engine
malfunction indicator
lamp comes on when
the engine is running.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.XCheck the fuel cap ( Y page 150).XIf it is not closed properly: Close the fuel cap.XIf it is closed properly: Have the fuel system checked by an
authorized Mercedes-Benz Center.What to do if …225Practical hints463_AKB; 3; 35, en-USd2ureepe,Version: 2.11.8.12009-07-16T20:59:56+02:00 - Seite 225Z
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TiresProblemPossible causes/consequences and M SolutionshUSA only:
Combination
low tire pressure
telltale/TPMS
malfunction
telltale for the
Advanced TPMS
illuminates
continuously.
Canada only:
Low tire
pressure telltale
for the
Advanced TPMS
illuminates
continuously.The Advanced TPMS detects a loss of pressure in at least one tire.XCarefully bring the vehicle to a halt, avoiding abrupt steering and
braking maneuvers. Observe the traffic situation around you.XRead and observe messages in the multifunction display
( Y page 203).
If the tire inflation pressure in the respective tire(s) has (have) been
corrected, the combination low tire pressure/TPMS malfunction
telltale goes out after a few minutes of driving.
hUSA only:
Combination
low tire pressure
telltale/TPMS
malfunction
telltale for the
Advanced TPMS
flashes 60
seconds and
then stays
illuminated.There is a malfunction in the Advanced TPMS.XRead and observe messages in the multifunction display
( Y page 203).XHave the Advanced TPMS checked at an authorized Mercedes-
Benz Center.
After the malfunction has been remedied, the combination low tire
pressure/TPMS malfunction telltale goes out after a few minutes
of driving.
GWarning!
Each tire, including the spare (if provided),
should be checked at least once a month
when cold and inflated to the inflation
pressure recommended by the vehicle
manufacturer on the Tire and Loading
Information placard on the driver’s door B-
pillar or the tire inflation pressure label on the
inside of the fuel filler flap. If your vehicle has
tires of a different size than the size indicated
on the Tire and Loading Information placard
or the tire inflation pressure label, you should
determine the proper tire inflation pressure
for those tires.
As an added safety feature, your vehicle has
been equipped with a tire pressure monitoring
system (TPMS) that illuminates a low tire
pressure telltale when one or more of your
tires are significantly underinflated.
Accordingly, when the low tire pressure
telltale illuminates, you should stop and check
your tires as soon as possible, and inflate
them to the proper pressure. Driving on a
significantly underinflated tire causes the tire
to overheat and can lead to tire failure.226What to do if …Practical hints
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Underinflation also reduces fuel efficiency
and tire tread life, and may affect the vehicle’s
handling and stopping ability. Please note that
the TPMS is not a substitute for proper tire
maintenance, and it is the driver’s
responsibility to maintain correct tire
pressure, even if underinflation has not
reached the level to trigger illumination of the
TPMS low tire pressure telltale.
USA only:
Your vehicle has also been equipped with a
TPMS malfunction indicator to indicate when
the system is not operating properly. The
TPMS malfunction indicator is combined with
the low tire pressure telltale. When the
system detects a malfunction, the telltale will
flash for approximately 1 minute and thenremain continuously illuminated. This
sequence will continue upon subsequent
vehicle start-ups as long as the malfunction
exists. When the malfunction indicator is
illuminated, the system may not be able to
detect or signal low tire pressure as intended.
TPMS malfunctions may occur for a variety of
reasons, including the installation of
incompatible replacement or alternate tires
or wheels on the vehicle that prevent the
TPMS from functioning properly. Always
check the TPMS malfunction telltale after
replacing one or more tires or wheels on your
vehicle to ensure that the replacement or
alternate tires and wheels allow the TPMS to
continue to function properly.
Lamp in center console
ProblemPossible causes/consequences and M Solutions4/
The front passenger
front air bag off
indicator lamp
illuminates and
remains illuminated
( Y page 36).A BabySmart™ child seat is installed on the front passenger seat
or the front passenger seat is empty. Therefore the front
passenger front air bag is switched off.The system is malfunctioning when the front passenger seat is
occupied with an adult or someone larger than a small individual.XHave the front passenger reposition himself or herself in the
seat.
If the front passenger front air bag of indicator lamp remains
illuminated:
XHave the system checked as soon as possible at an authorized
Mercedes-Benz Center.GWarning!
If the 4/ indicator lamp illuminates
and remains illuminated with the front
passenger seat occupied with an adult or
someone larger than a small individual, do not
transport a child or an passenger on the front
passenger seat until the system has been
repaired.What to do if …227Practical hints463_AKB; 3; 35, en-USd2ureepe,Version: 2.11.8.12009-07-16T20:59:56+02:00 - Seite 227Z
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ProblemPossible causes/consequences and M Solutions4/
The front passenger
front air bag off
indicator lamp does not
illuminate or does not
remain illuminated with
a BabySmart™ child
seat properly installed
on the front passenger
seat or with an empty
front passenger seat.
The system is malfunctioning.XMake sure there is nothing between seat cushion and child seat.XCheck installation of the child seat (Y page 48).
If the front passenger front air bag off indicator lamp remains out:
XHave the system checked as soon as possible at an authorized
Mercedes-Benz Center.
Do not use the BabySmart™ restraint to transport children on the
front passenger seat until the system has been repaired.
GWarning!
If the 4/ indicator lamp does not
illuminate or remains out with a BabySmart™
child seat properly installed on the front
passenger seat or with an empty front
passenger seat, do not transport a child or a
passenger on the front passenger seat until
the system has been repaired.
Unlocking/locking manually
Unlocking the vehicle
If you cannot unlock the vehicle with the
SmartKey, unlock the driver’s door and the
tailgate using the mechanical key.
The anti-theft alarm system will trigger when
you
Runlock the driver’s door or the tailgate with
the mechanical key
and
Ropen the driver’s door or the tailgate
To cancel the alarm, insert the SmartKey into
the starter switch.
Removing the mechanical key XMove locking tab : in the direction of
arrow.
XSlide mechanical key ; out of the housing.
Unlocking the driver’s door
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XInsert mechanical key ; into the lock
cylinder.
XTurn mechanical key ; counterclockwise
to position 1 until the locking knob moves
up.
The driver’s door is unlocked.
XRemove mechanical key ;.XPress lock cylinder and pull on door handle
to open the driver’s door.
Unlocking the tailgate
GWarning!
The tailgate swings open to one side. Always
make sure there is sufficient clearance for the
tailgate.
Make sure the tailgate is closed when the
engine is running and while driving. Among
other dangers, deadly carbon monoxide (CO)
gases may enter vehicle interior resulting in
unconsciousness and death.
XInsert mechanical key = into the lock
cylinder.
XTurn mechanical key = counterclockwise
to position 2.
XRemove mechanical key =.XPress lock cylinder and pull on door
handle : to open the tailgate.
Locking the vehicle
If you cannot lock the vehicle with the
SmartKey, lock it as follows:
XOpen the driver’s door.XClose the front passenger door, the rear
doors, and the tailgate.
XPress the central locking switch
(Y page 63).
The locking knobs of the front passenger
door, the rear doors, and the tailgate move
down.
XIf the vehicle battery is disconnected or
drained: Press down the locking knobs on
the front passenger door, the rear doors,
and the tailgate.
XExit the vehicle.XClose the driver’s door.XRemove mechanical key ; from the
SmartKey (Y page 228).
XInsert mechanical key ; into the lock
cylinder.
XTurn mechanical key ; clockwise to
position 1.
The vehicle is locked.
XTurn mechanical key ; back and remove
it from the lock cylinder.
XCheck if the tailgate is locked.XIf necessary, lock the tailgate with the
mechanical key (Y page 64).
iThis procedure does not arm the anti-
theft alarm system, nor does it lock the fuel
filler flap.
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Manually unlocking the gear selector
lever
If the vehicle’s electrical system is
malfunctioning, the gear selector lever could
remain locked in park position P. In this case
the gear selector lever can be unlocked
manually, e.g. to tow the vehicle.
XEngage the parking brake.XInsert suitable tool : (e.g. a ball point pen)
into the covered opening.
XSimultaneously push tool : downward
and move the gear selector lever out of
park position P.
XRemove tool :.
The gear selector lever is unlocked.
The cover returns to its closed position after
moving the gear selector lever to the
positions D+ and D-.
iThe gear selector lever is locked again as
soon as you move it back to park position
P.
Fuel filler flap
GWarning!
Avoid contact with the vehicle walls as they
may contain sharp edges. Otherwise, you
could injure yourself while releasing the fuel
filler flap.
In case the central locking system does not
release the fuel filler flap, you can open it
manually.
The fuel filler flap release is located on the
passenger side in the cargo compartment
behind the side trim panel.
XOpen the tailgate (Y page 63).XRemove edge protection : in direction of
arrow ;.
iBefore removing side trim panel =
completely, the electrical connectors must
be disconnected.
XPull off side trim panel = in direction of
arrow ? so the electrical connectors are
accessible.
XDisconnect the electrical connectors.XRemove side trim panel = completely.XPull fuel filler flap release A upwards in
direction of arrow.
XOpen the fuel filler flap (Y page 150).XConnect the electrical connectors.XReinstall side trim panel = (Y page 231).230Unlocking/locking manuallyPractical hints
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