Display messagesPossible causes/consequences and M SolutionsÀAttention
Assist
Inoperativ
eThe ATTENTION ASSIST is malfunctioning.XContact an authorized Mercedes-Benz Center as soon as
possible.
Vehicle
Display messagesPossible causes/consequences and M SolutionsNThe trunk is open.XClose the trunk ( Y page 82).MYou are driving with the hood open.XStop the vehicle in a safe location as soon as it is safe to
do so.XClose the hood ( Y page 224).
There is otherwise danger of an accident.
CYou are driving with at least one door open.
The display symbol shows you which doors are open.XClose all doors._Rear Left
Backrest
Not
Latched
or
Rear
Right
Backrest
Not
LatchedThe left or right rear seat backrest is not engaged.XAdjust the rear seat backrest until it is fully engaged in
position.+Take Your
Key From
IgnitionYou have forgotten to remove the SmartKey.XRemove the SmartKey from the starter switch.+Obtain A
New KeyThe SmartKey is malfunctioning.XContact an authorized Mercedes-Benz Center.+Close
Doors To
Lock
VehicleYou tried to lock the vehicle but not all doors were closed.XClose doors and lock the vehicle again.Vehicle status messages in the multifunction display293Practical hints212_AKB; 2; 41, en-USd2ureepe,Version: 2.11.8.12009-07-17T09:14:21+02:00 - Seite 293Z
Display messagesPossible causes/consequences and M Solutions+Key Does
Not
Belong to
VehicleThe SmartKey in the starter switch does not belong to the
vehicle.XRemove the SmartKey from the starter switch.+Replace
Key
BatteryThe batteries in the SmartKey with KEYLESS-GO are
discharged.XReplace the batteries ( Y page 317).+Key Not
Detected
(message
appears in
red)The SmartKey with KEYLESS-GO is not detected while the
engine is running because the SmartKey is not in the vehicle.XStop the vehicle as soon as it is safe to do so.XEngage the parking brake.XSearch for the SmartKey.
The vehicle cannot be locked centrally nor can the engine
be started again after the engine is stopped.+Key Not
Detected
(message
appears in
red)The SmartKey with KEYLESS-GO is not detected while the
engine is running because there is strong radio-frequency
interference.XStop the vehicle as soon as it is safe to do so.XEngage the parking brake.XRemove the KEYLESS-GO button from the starter switch
( Y page 86).XOperate the vehicle with the SmartKey in the starter switch.+Key Not
Detected
(message
appears in
white)The SmartKey with KEYLESS-GO is momentarily not detected.XChange the position of the SmartKey in the vehicle.XIf necessary, remove the KEYLESS-GO button from the
starter switch ( Y page 86).+Remove
'Start'
Button
and
Insert KeyThe KEYLESS-GO system is malfunctioning.XRemove the KEYLESS-GO button from the starter switch
( Y page 86).XOperate the vehicle with the SmartKey in the starter switch.¥Check
Washer
FluidThe washer fluid in the washer fluid reservoir has fallen below
the minimum level.XAdd washer fluid ( Y page 227).294Vehicle status messages in the multifunction displayPractical hints
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Display messagesPossible causes/consequences and M SolutionsbAuto Lamp
Function
Inoperativ
eThe light sensor is malfunctioning. The headlamps come on
automatically.XContact an authorized Mercedes-Benz Center as soon as
possible.
To switch off the headlamps (U.S. vehicles only):
XSwitch off the daytime running lamp mode in the control
system ( Y page 141).XSwitch off the headlamps using the exterior lamp switch
( Y page 97).bCheck
Left Low
Beam
or
Check
Right Low
BeamThe left or right low-beam lamp is malfunctioning.XHalogen headlamp: Replace the bulb as soon as possible
( Y page 318).XBi-Xenon headlamp: Contact an authorized Mercedes-
Benz Center as soon as possible.bCheck
Rear Left
Fog LampThe rear fog lamp is malfunctioning. This message will only
appear if all LEDs have stopped working.XContact an authorized Mercedes-Benz Center as soon as
possible.bSwitch
Off LightsYou 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 vehicle
and left the headlamps on.XTurn the exterior lamp switch to $ or c
( Y page 97).
or
XWith the fog lamps switched on: Push in the exterior
lamp switch to its stop.bCheck
Left Tail
and Brake
Lamps
or
Check
Right
Tail and
Brake
LampsThe left or right tail lamp/brake lamp is malfunctioning. This
message will only appear if all LEDs have stopped working.XContact an authorized Mercedes-Benz Center as soon as
possible.302Vehicle status messages in the multifunction displayPractical hints
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ProblemPossible causes/consequences and M SolutionsUSA only:
45
The front passenger
front air bag off
indicator lamp
illuminates and
remains illuminated
with the weight of a
typical adult or
someone larger than a
small individual on the
front passenger seat.The system is malfunctioning.XHave the system checked as soon as possible at an authorized
Mercedes-Benz Center.XRead and observe messages in the multifunction display and
follow corrective steps ( Y page 272).GWarning!
If the 45 indicator lamp illuminates
and remains illuminated with the weight of a
typical adult or someone larger than a small
individual on the front passenger seat, do not
have any passenger use the front passenger
seat until the system has been repaired.ProblemPossible causes/consequences and M SolutionsUSA only:
45
The front passenger
front air bag off
indicator lamp does not
illuminate and/or does
not remain illuminated
with the weight of a
typical 12-month-old
child in a standard child
restraint or less on the
front passenger seat.The system is malfunctioning.XMake sure there is nothing between seat cushion and child seat
and check installation of the child seat.XMake sure no objects applying supplemental weight onto the
seat are present.XIf the front passenger front air bag off indicator lamp remains
out, have the system checked as soon as possible at an
authorized Mercedes-Benz Center. Do not transport a child on
the front passenger seat until the system has been repaired.XRead and observe messages in the multifunction display and
follow corrective steps ( Y page 272).GWarning!
If the 45 indicator lamp does not
illuminate or remains out with the weight of a
typical 12-month-old child in a standard child
restraint or less on the front passenger seat,
do not transport a child 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 or with KEYLESS-GO, unlock the
driver’s door and the trunk using the
mechanical key.
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The anti-theft alarm system will trigger when
you
Runlock the driver’s door or the trunk with
the mechanical key
and
Ropen the driver’s door or the trunk
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
XInsert mechanical key ; into the driver’s
door lock.
XTurn mechanical key ; counterclockwise
to position 1.
XPull the door handle to open the driver’s
door.
XTurn mechanical key ; back and remove
it from the driver’s door lock.
Unlocking the trunk
A minimum height clearance of 5.78 ft
(1.76 m) is required to open the trunk lid.
XInsert mechanical key ; into the trunk lid
lock.
XTurn mechanical key ; counterclockwise
to position 1.
! When you open the trunk, the trunk lid
swings open upwards. Always make sure
there is sufficient overhead clearance.
XTurn mechanical key ; back and remove
it from the trunk lid lock.
Locking the vehicle
If you cannot lock the vehicle with the
SmartKey or with KEYLESS-GO, lock it as
follows:
XOpen the driver’s door.XClose the front passenger door, the rear
doors, and the trunk.
XPress the central locking switch
(Y page 81).
The locking knobs of the front passenger
door and the rear doors move down.
XIf the vehicle battery is disconnected or
drained: Press down the locking knobs on
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the front passenger door and the rear
doors.
XExit the vehicle.XClose the driver’s door.XRemove mechanical key ; from the
SmartKey (Y page 315).
XInsert mechanical key ; into the driver’s
door lock.
XTurn mechanical key ; clockwise to
position 1.
The vehicle is locked.
XTurn mechanical key ; back and remove
it from the driver’s door lock.
XCheck whether the doors and the trunk are
locked.
XIf necessary, lock the trunk with the
mechanical key (Y page 85).
iThis procedure does not arm the anti-
theft alarm system, nor does it lock the fuel
filler flap.
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 trunk behind the cover.
XOpen the trunk (Y page 81).XPush the parcel net down.XOpen the cover (Y page 268).XRemove fuel filler flap release ; from
holder :.
XPull fuel filler flap release ; in direction of
the arrow.
XOpen the fuel filler flap (Y page 220).XClose the cover.XClose the trunk.
Resetting activated NECK-PRO active
front head restraints
If the NECK-PRO active front head restraints
have been triggered in a rear-end collision,
they must be reset.
You can tell that the NECK-PRO active front
head restraints have been triggered when
they have been moved forward and cannot be
adjusted.
GWarning!
For safety reasons, have the NECK-PRO active
front head restraints checked at an
authorized Mercedes-Benz Center after a
rear-end collision.
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GWarning!
When pushing back the head restraint
cushion, make sure your fingers do not
become caught between the head restraint
cushion and the cover. Failing to do so may
lead to injury.
XPull the top of the head restraint cushion in
direction of arrow : as far as it will go.
XAdjust the head restraint cushion
downward in direction of arrow ; as far as
it will go.
XFirmly press the top of the head restraint
cushion towards the head restraint cover in
direction of arrow = until it engages.
XRepeat this procedure on the NECK-PRO
active front head restraint for the second
front seat.
For information on NECK-PRO active front
head restraints, see “NECK-PRO active front
head restraints” (Y page 54).
Replacing SmartKey batteries
If the batteries in the SmartKey are
discharged, the vehicle can no longer be
locked or unlocked. It is recommended to
have the batteries replaced at an authorized
Mercedes-Benz Center.
GWarning!
Batteries contain poisonous and corrosive
substances. Therefore, keep the batteries out
of reach of children.
If a battery is swallowed, seek medical help
immediately.
GWarning!
SmartKey batteries contain perchlorate
material, which may require special handling
and regard for the environment. Check with
your local government’s disposal guidelines.
California residents, see www.dtsc.ca.gov/
HazardousWaste/Perchlorate/
index.cfm.
Batteries contain materials that can harm the
environment if disposed of improperly.
Recycling of batteries is the preferred method
of disposal. Many states (USA only) or
provinces (Canada only) require sellers of
batteries to accept old batteries for recycling.
When inserting the batteries, make sure they
are clean and free of lint.
When replacing batteries, always replace
both batteries.
iThe required replacement batteries are
available at any authorized Mercedes-Benz
Center.
Replacement batteries: Lithium, type
CR 2025 or equivalent.
XRemove the mechanical key from the
SmartKey (Y page 315).
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XPress mechanical key ; into the SmartKey
opening until battery compartment
cover : opens. Do not keep the cover
shut.
XRemove the battery compartment cover.XPat the SmartKey against the palm of your
hand until battery = falls out.
XInsert the new battery with the positive
terminal (+) facing up. Use a lint-free cloth.
XInsert the tabs of the battery compartment
cover into the housing and press the cover
closed.
XCheck the operation of the SmartKey as
well as the KEYLESS-GO function.
Replacing bulbs
Safety notes
Safe vehicle operation depends on proper
exterior lighting and signaling to a large
degree.
Correct headlamp adjustment is extremely
important. Have headlamps checked and
readjusted at regular intervals and when a
bulb has been replaced. Contact an
authorized Mercedes-Benz Center for
headlamp adjustment.
GWarning!
Bulbs and bulb sockets can be very hot. Allow
the lamp to cool down before changing a bulb.
Keep bulbs out of reach of children.
Halogen lamps contain pressurized gas. A
bulb can explode if you
Rtouch or move it when hot
Rdrop the bulb
Rscratch the bulb
Wear eye and hand protection.
Because of high voltage in Xenon lamps, it is
dangerous to replace the bulb or repair the
lamp and its components. We recommend
that you have such work done by a qualified
technician.
iSince replacing bulbs is a technically
highly demanding process, we recommend
to have them replaced at an authorized
Mercedes-Benz Center.
iIf the headlamps or front fog lamps are
fogged up on the inside as a result of high
humidity, driving the vehicle a distance with
the lights on should clear up the fogging.
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