
Useful information
i
This Operator's Manual describes all models
and all standard and optional equipment of
your vehicle available at the time of publica-
tion of the Operator's Manual. Country-spe-
cific differences are possible. Please note
that your vehicle may not be equipped with all
features described. This also applies to
safety-related systems and functions.
iRead the information on qualified specialist
workshops: (Ypage 23).
SmartKey
Important safety notes
GWARNING
If children are left unsupervised in the vehicle,
they could:
Ropen the doors, thus endangering other
people or road users.
Rget out and disrupt traffic.
Roperate the vehicle's equipment.
Additionally, children could set the vehicle in
motion if, for example, they:
Rrelease the parking brake.
Rshift the automatic transmission out of park
position P or shift manual transmission into
neutral.
Rstart the engine.
There is a risk of an accident and injury.
When leaving the vehicle, always take the
SmartKey with you and lock the vehicle. Never
leave children or animals unattended in the
vehicle. Always keep the SmartKey out of
reach of children.
GWARNING
If persons, particularly children are subjected to prolonged exposure to extreme heat or
cold, there is a risk of injury, possibly even
fatal. Never leave children unattended in the
vehicle.
GWARNING
If you attach heavy or large objects to the
SmartKey, the SmartKey could be uninten-
tionally turned in the ignition lock. This could
cause the engine to be switched off. There is a risk of an accident.
Do not attach any heavy or large objects to the
SmartKey. Remove any bulky key rings before
inserting the SmartKey into the ignition lock.
SmartKey functions
:& To lock the vehicle
;%Unlocks the vehicle
XTo unlock centrally: press the%button.
If you do not open the vehicle within approx-
imately 40 seconds of unlocking:
Rthe vehicle is locked again.
Ranti-theft protection is reactivated.
XTo lock centrally: press the&button.
The SmartKey centrally locks/unlocks:
Rthe doors
Rthe rear door
Rthe fuel filler flap
iThe turn signals flash once when unlocking
and three times when locking.
You can also set an audible signal to confirm
that the vehicle has been locked. The audible
signal can be activated and deactivated using
the on-board computer (
Ypage 180).
When it is dark, the surround lighting also comes
on if it is activated in the on-board computer
(
Ypage 179).
60SmartKey
Opening and closing

The SmartKey batteries contain perchlorate
material, which may require special handling
and regard for the environment. Check your
national disposal guidelines. In California, see
www.dtsc.ca.gov/HazardousWaste/
Perchlorate/index.cfm.
Mercedes-Benz recommends that you have the
batteries replaced at a qualified specialist work-
shop.
Checking the battery
XPress the&or% button.
The battery is working properly if battery
check lamp :lights up briefly.
If battery check lamp :does not light up
during the test, the battery is discharged.
XChange the battery (Ypage 62).
iYou can obtain a battery at any qualified
specialist workshop.
iHave the batteries replaced at a qualified
specialist workshop.
iIf the SmartKey battery is checked within
the signal reception range of the vehicle,
pressing the &or% button:
Rlocks or
Runlocks the vehicle
Replacing the battery
You require a CR 2025 3 V cell battery.
XTake the mechanical key out of the SmartKey
(Ypage 61).
:Battery compartment cover
;Mechanical key
XPress mechanical key ;into the opening in
the SmartKey in the direction of the arrow
until battery tray cover :opens. Do not hold
the cover closed while doing so.
XRemove battery tray cover :.
=Battery
XRepeatedly tap the SmartKey against your
palm until battery=falls out.
XInsert the new battery with the positive ter-
minal facing upwards. Use a lint-free cloth to
do so.
XMake sure that the surface of the battery is
free from lint, grease and all other forms of
contamination.
XInsert the front tabs of battery tray cover :
and then press to close it.
XInsert the mechanical key into the SmartKey.
XCheck the function of all SmartKey buttons on
the vehicle.
62SmartKey
Opening and closing

Problems with the SmartKey
ProblemPossible causes/consequences andMSolutions
You cannot lock or
unlock the vehicle using
the SmartKey.The SmartKey battery is discharged or nearly discharged.
XPoint the tip of the SmartKey at the driver's door handle from a
distance of approximately 1.5 ft (50 cm) and try to unlock or lock the
vehicle again.
If this does not work:
XCheck the SmartKey battery (Ypage 62) and replace it if necessary
(Ypage 62).
XUnlock (Ypage 66) or lock (Ypage 66) the vehicle using the
mechanical key.
The SmartKey is faulty.
XLock or unlock the vehicle using the mechanical key (Ypage 66).
XHave the SmartKey checked at a qualified specialist workshop.
You have lost a Smart-
Key.XHave the SmartKey deactivated at a qualified specialist workshop.
XReport the loss immediately to the vehicle insurers.
XIf necessary, have the locks changed as well.
You have lost the
mechanical key.XReport the loss immediately to the vehicle insurers.
XIf necessary, have the locks changed as well.
The engine cannot be
started using the Smart-
Key.The SmartKey has been in position 0(Ypage 112) for a considerable
time.
XRemove the SmartKey and reinsert it into the ignition lock.
XStart the engine.
The on-board voltage is too low.
XSwitch off non-essential consumers, e.g. seat heating or interior
lighting, and try to turn the SmartKey again.
If this does not work:
XCheck the battery and charge it if necessary (Ypage 252).
or
XJump-start the vehicle (Ypage 254).
or
XConsult a qualified specialist workshop.
SmartKey63
Opening and closing
Z

Doors
Important safet ynotes
GWARNING
Whe nleavin gth evehicle, always remov eth e
SmartKey from th eignition lock. Always take
th eSmartKey wit hyou and loc kth evehicle.
Do no tleav echildren unsupervised in th e
vehicle, eve nif they are secure din achild
restrain tsystem, and do no tgiv ethem access
to an unlocke dvehicle. Achild' sunsupervised
access to avehicle could result in an acciden t
and/o rserious personal injury. The ycould:
Rinjure themselves on vehicle parts
Rbe seriously or fatally injured by extreme
heat or cold
Rinjure themselves or hav ean acciden twit h
vehicle equipmen tthat may still be in oper-
ation eve nafter th eSmartKey has bee n
removed from th eignition ,suc has th eseat
adjustment, steerin gwhee ladjustmen tor
memor yfunction .
If children ope n adoor, they could cause
severe or eve nfatal injury to other persons; if
they get out of th evehicle, they could injure
themselves when doin gso or be seriously or
eve nfatally injured by any passin gtraffic .
Do no texpos eth echild restrain tsyste mto
direc tsunlight. The child restrain tsystem' s
metal parts ,fo rexample, could becom ever y
hot ,and
achi
ld could be burne don these
parts .
GWARNING
Do no tcarry heav yor har dobjects in th e
passenger compartmen tor cargo compart -
men tunless they are firmly secure din place.
Unsecure dor improperly positioned cargo
increase s achild' sris kof injury in th eevent of
Rstrong braking maneuvers
Rsudden changes of direction
Ran acciden t
GWARNING
If children are lef tunsupervised in th evehicle,
they could:
Rope nth edoors ,thus endangerin gother
people or road users.
Rget out and disrup ttraffic .
Roperat eth evehicle' sequipment.
Additionally, children could set th evehicle in
motion if, fo rexample, they:
Rrelease th eparking brake .
Rshift theautomatic transmissio nout of par k
position Por shift manual transmissio ninto
neutral.
Rstart th eengine.
There is aris kof an acciden tand injury.
Whe nleavin gth evehicle, always take th e
SmartKey wit hyou and loc kth evehicle. Never
leav echildren or animals unattended in th e
vehicle. Always keep th eSmartKey out of
reach of children .
Unlockingan dopening doors from
th einside
If th evehicle has previously bee nlocke dwit h
th eSmartKey, opening adoo rfrom th einsid e
will trigger th eanti-thef talar msystem. Switc h
of fth ealar m (
Ypage 59).
Only ope nth edoo rwhen th etraffic situation
permits.
64Doors
Opening and closing

XMake sure that the doors and the tailgate are
locked.
XInsert the mechanical key into the SmartKey.
iIf you lock the vehicle as described above,
the fuel filler flap is not locked. The anti-theft
alarm system is not armed.
Rear door
Important safety notes
GWARNING
When leaving the vehicle, always remove the
SmartKey from the ignition lock. Always take
the SmartKey with you and lock the vehicle.
Do not leave children unsupervised in the
vehicle, even if they are secured in a child
restraint system, and do not give them access to an unlocked vehicle. A child's unsupervised
access to a vehicle could result in an accident
and/or serious personal injury. They could:
Rinjure themselves on vehicle parts
Rbe seriously or fatally injured by extreme
heat or cold
Rinjure themselves or have an accident with
vehicle equipment that may still be in oper-
ation even after the SmartKey has been
removed from the ignition, such as the seat
adjustment, steering wheel adjustment or
memory function.
If children open a door, they could cause
severe or even fatal injury to other persons; if they get out of the vehicle, they could injure
themselves when doing so or be seriously or
even fatally injured by any passing traffic.
Do not expose the child restraint system to
direct sunlight. The child restraint system's
metal parts, for example, could become very
hot, and a child could be burned on these
parts.
GWARNING
Do not carry heavy or hard objects in the
passenger compartment or cargo compart-
ment unless they are firmly secured in place.
Unsecured or improperly positioned cargo
increases a child's risk of injury in the event of
Rstrong braking maneuvers
Rsudden changes of direction
Ran accident
GWARNING
Combustion engines emit poisonous exhaust
gases such as carbon monoxide. If the rear
door is open when the engine is running, par-
ticularly if the vehicle is moving, exhaust
fumes could enter the passenger compart-
ment. There is a risk of poisoning.
Turn off the engine before opening the rear
door. Never drive with the rear door open.
!The tailgate swings out to the side when
opened. Therefore, make sure that there is
sufficient clearance.
iDo not leave the SmartKey in the cargo
compartment. Otherwise, you could lock
yourself out.
Opening
You can only open the rear door after unlocking
it first.
XPress the %button on the SmartKey.
XPress release button :and pull door han-
dle ;.
XOpen the rear door.
Rear door67
Opening and closing
Z

XPoint the tip of the SmartKey at the driver's
door handle.
XPress and hold the%button until the side
windows and the sliding sunroof are in the
desired position.
XTo interrupt convenience opening: release
the % button.
Convenience closing feature
Important safety notes
GWARNING
When the convenience closing feature is oper- ating, parts of the body could become trapped
in the closing area of the side window and the
sliding sunroof. There is a risk of injury.
Observe the complete closing procedure
when the convenience closing feature is oper-
ating. Make sure that no body parts are in
close proximity during the closing procedure.
Operation
iThe "convenience closing feature" can only
be operated using the key. The SmartKey
must be close to the driver's door handle.
When you lock the vehicle, you can simultane-
ously:
Rclose the side windows
Rclose the sliding sunroof
XPoint the tip of the SmartKey at the driver's
door handle.
XPress and hold the &button until the side
windows and the sliding sunroof are fully
closed.
XMake sure that all the side windows and the
sliding sunroof are closed.
XTo interrupt convenience closing: release
the & button.
Problems with the side windows
GWARNING
Closing the side windows with increased force
or without the anti-entrapment feature could
lead to serious or even fatal injury. Make sure
that nobody can become trapped when clos-
ing the side windows.
Problem: a side window cannot be closed
because objects are trapped between the
side window and the door frame.
XRemove the objects.
XClose the side window.
Problem: a side window cannot be closed
and you cannot see the cause.
If a side window is obstructed during closing and
reopens again slightly:
XImmediately after the window blocks, pull the
corresponding switch again until the side win-
dow has closed.
If a side window is obstructed again during clos-
ing and reopens again slightly:
XImmediately after the window blocks, pull the
corresponding switch again until the side win-
dow has closed.
iIf a side window no longer opens or closes
due to a malfunction, contact a qualified spe-
cialist workshop.
Sliding sunroof
Important safety notes
!
Only open the sliding sunroof if it is free of
snow and ice. Otherwise, malfunctions may
occur.
Do not allow anything to protrude from the
sliding sunroof. Otherwise, the seals could be
damaged.
!If the sliding sunroof still cannot be opened
or closed as a result of a malfunction, contact
a qualified specialist workshop.
!The weather can change abruptly. It could
start to rain or snow. Make sure that the slid- ing sunroof is closed when you leave the vehi-
cle. The vehicle electronics can be damaged if
water enters the vehicle interior.
iResonance noises can occur in addition to
the usual airflow noises when the sliding sun- roof is open. They are caused by minor pres-
sure fluctuations in the vehicle interior.
Change the position of the sliding sunroof or
open a side window slightly to reduce or elim-
inate these noises.
Sliding sunroof69
Opening and closing
Z

XReconnect theelectrical connections.
XRe-instal lrear panel trim =.
When doin gso, hoo klugs Bof rear panel
trim =intovehicl eside wall C.
XRe-installedge protection :.
XClose therear door .
Problems with the sliding sunroof
GWARNIN G
You could be severely or eve nfatally injured
when closin gth esliding sunroo fwit h
increased closin gforce or if th eanti-entrap-
men tfeature is deactivated. Mak esur ethat
nobody can become trapped when closin gth e
sliding sunroof.
!If th esliding sunroo fstill canno tbe opened
or closed as aresult of amalfunction ,contact
a qualified specialist workshop.
Problem :th esunroo fcannot be closed and
you cannot see th ecause.
If th esliding sunroo fis obstructed during clos-
ing and reopen sagain slightly:
XImmediately after th esliding sunroo fblocks ,
pull th e¡ switch in th eoverhead control
panel down to th epoin tof resistanc eand hold
it until th esliding sunroo fis closed.
If th esliding sunroo fis obstructed again during
closin gand reopen sagain slightly:
XImmediately after th esliding sunroo fblocks ,
pull th e¡ switch in th eoverhead control
panel down to th epoin tof resistanc eand hold
it until th esliding sunroo fis closed.
Sliding sunroof71
Opening and closing
Z

Useful information
i
This Operator's Manual describes all models
and all standard and optional equipment of
your vehicle available at the time of publica-
tion of the Operator's Manual. Country-spe-
cific differences are possible. Please note
that your vehicle may not be equipped with all
features described. This also applies to
safety-related systems and functions.
iRead the information on qualified specialist
workshops: (Ypage 23).
Correct driver's seat position
:Steering wheel
;Seat belts
=Backrest
XObserve the safety guidelines on seat adjust-
ment (Ypage 72).
XMake sure that seat =is adjusted properly.
Electrical seat adjustment (
Ypage 74)
When adjusting the seat, make sure that:
Ryou are as far away from the driver's air bag as
possible
Ryou are sitting in a normal upright position
Ryou can fasten the seat belt properly
Ryou have moved the backrest to an almost
vertical position
Ryou have set the seat cushion angle so that
your thighs are gently supported
Ryou can depress the pedals properly
XCheck whether the head restraint is adjusted
properly (Ypage 74).
When doing so, make sure that you have
adjusted the head restraint so that the back of
your head is supported at eye level by the
center of the head restraint.
XObserve the safety guidelines on steering
wheel adjustment (Ypage 72).
XMake sure that steering wheel :is adjusted
properly.
Adjusting the steering wheel electrically
(
Ypage 78).
When adjusting the steering wheel, make sure
that:
Ryou can hold the steering wheel with your
arms slightly bent
Ryou can move your legs freely
Ryou can see all the displays in the instrument
cluster clearly
XObserve the safety guidelines for seat belts
(Ypage 36).
XCheck whether you have fastened seat
belt ;properly (Ypage 38).
The seat belt should:
Rfit snugly across your body
Rbe routed across the middle of your shoulder
Rbe routed in your pelvic area across the hip
joints
XBefore starting off, adjust the rear-view mirror
and the exterior mirrors in such a way that you
have a good view of road and traffic condi-
tions (
Ypage 80).
XVehicles with a memory function: save the
seat, steering wheel and exterior mirror set-
tings with the memory function (
Ypage 82).
Seats
Important safety notes
GWARNING
Children could become trapped if they adjust
the seats, particularly when unattended.
There is a risk of injury.
72Seats
Seats, steering wheel and mirrors