Page 65 of 290

G
WARNING
When leaving the vehicle, alwaysr emove the
SmartKey from the ignitio nlock. Always take
the SmartKey with you and lock the vehicle.
Do not leave children unsupervised in the
vehicle, even if they are secure dinachild
restraint system, and do not give them access to an unlocked vehicle. Achild's unsupervised
access to avehicl ecouldr esult in an accident
and/or serious personal injury .They could:
R injure themselves on vehicl eparts
R be seriouslyorf atally injured by extreme
heatorc old
R injure themselves or have an accident with
vehicl eequipment that may still be in oper-
ation even after the SmartKey has been
removed from the ignition, such as the seat
adjustment, steering whee ladjustment or
memory function.
If children open adoor, they coul dcause
severe or even fatal injury to other persons; if they get out of the vehicle, they coul dinjure
themselves when doing so or be seriouslyor
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, coul dbecome very
hot, and achild coul dbeburned on these
parts. G
WARNING
If you attach heavy or larg eobjects to the
SmartKey ,the SmartKey coul dbeuninten-
tionally turned in the ignitio nlock. This could
caus ethe engine to be switched off. There is a
risk of an accident.
Do not attach any heavy or larg eobjects to the
SmartKey .Remove any bulky key rings before
inserting the SmartKey into the ignitio nlock.
! Keep the SmartKey away from strong
magnetic fields. Otherwise, the remote
control function coul dbeaffected.
Strong magnetic fields can occur in the
vicinity of powerful electrical installations. 0043
0037 To lock the vehicle
0044 0054 To unlock the trunk lid
0087 0036 To unlock the vehicle
The turn signals flas honce when unlocking
and three times when locking.
When it is dark, the surround lighting also
comes on if it is activated in the on-board
computer (Y page158).
X To unlock centrally: press the0036but-
ton.
If you do not open the vehicl ewithinapprox-
imatel y40seconds of unlocking:
R the vehicl eislocked again.
R the anti-theft alarm system is armed again.
X To lockc entrally: press the 0037button. Changing the setting
softhe locking
system
You can change the setting of the locking
system in such awaythat only the driver's
door and the fuel filler flap are unlocked .This
is useful if you frequently travel on youro wn.
X To chang ethe setting: press and hold
downt he0036 and0037 buttons simulta-
neously for approximatel ysix seconds until
the battery check lamp (Y page65)
flashes twice . SmartKey
63Opening and closing Z
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The SmartKey now functions as follows:
X To unlock the driver's door: press the
0036 button once.
X To unlock centrally: press the0036but-
ton twice.
X To lock centrally: press the0037button. Restoring the factor
ysettings
X Press the 0036and0037 button ssimulta-
neously for approximately six seconds until
the battery check lamp flashes twice. Mechanical key
General notes If the vehicle can no longer be locked or
unlocked with the SmartKey, use the
mechanical key.
If you use the mechanical key to unlock and
open the driver's door, the anti-theft alarm
system will be triggered (Y page 58).
There are several ways to turn off the alarm:
X Press the 0036or0037 button on the
SmartKey.
or X Insert the SmartKey into the ignition lock.
X To unlock the fuel filler flap: insert the
SmartKey into the ignition lock.
Removing the mechanical key X
Push release catch 0043in the direction of
the arrow and at the same time remove
mechanical key 0044from the SmartKey. SmartKey battery
Important safety notes G
WARNING
Batteries contain toxic and corrosive substan- ces. If batteries are swallowed ,itcan result in
severe health problems. There is arisk of fatal
injury.
Keep batteries out of the reach of children. If
ab attery is swallowed ,seek medical attention
immediately. H
Environmenta
lnote Batteries contain dangerous
substances
.Itisagainst the
law to dispose of them with
the household rubbish. They
must be collected separately and recycled to protec tthe
environment. Dispose of batteries in an
environmentally friendly
manner
.Take discharged
batteries to aqualified spe-
cialist workshop or aspecial
collection point for used bat- teries.
The SmartKey batteries contain perchlorate
material, which may require special handling
and regard for the environment.N ational
guidelines must be observed during disposal.
In California, see www.dtsc.ca.gov/
HazardousWaste/Perchlorate/
index.cfm .
Mercedes-Benz recommends that you have
the batteries replaced at aqualified specialist
workshop. 64
SmartKeyOpening and closing
Page 67 of 290

Checking th
ebattery X
Press the 0037or0036 button.
The SmartKey battery is working properl yif
battery check lamp 0043light supb riefly.
If battery check lamp 0043does no tlight up
briefly durin gthe test ,the SmartKey battery is
discharged.
X Change th ebattery (Y page 65).
i If th eSmartKey battery is checked within
th es ignal reception range of th evehicle,
pressin gthe 0037 or0036 button:
R locks or
R unlock sthe vehicle
i You can get
abattery at any qualified spe-
cialist workshop.
Replacin gthe battery X
Tak ethe mechanical ke yout of th eSmart-
Key (Y page 64).
You require aCR20253V cellbattery. X
Press mechanical key 0044intot he opening
in th eSmartKey in th edirection of the
arrow until battery tray cover 0043opens. Do
no th old th ecover closed while doin gso. X
Remove th ecover of th ebattery tray.
X Repeatedly tap th eSmartKey against your
palm until battery 0087falls out.
X Inser tthe newb attery wit hthe positiv eter-
minal facing upwards .Use alint-free cloth
to do so.
X Inser tthe fron ttab soft hebattery tray's
cover first ,and then pres stoclose it.
X Chec kthe function of all SmartKey buttons
on th evehicle. SmartKey
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Problems with the SmartKey
Problem
Possible causes/consequences and
0050
0050Solutions You cannot lock or
unlock the vehicle
using the SmartKey. The SmartKey battery is discharged or nearly discharged.
X Point the tip of the SmartKey at the driver's door handle from
close range. Try to unlock or lock the vehicle again.
If this does not work:
X Unlock the vehicle using the mechanical key (Y page 64).
X Check the SmartKey battery and replace it if necessary
(Y page 65). The SmartKey is faulty.
X Lock or unlock the vehicle using the mechanical key
(Y page 64).
X Have the SmartKey checked at aqualified specialist workshop. You have lost
aSmart-
Key. X
Have the SmartKey canceled at an authorized Mercedes-Benz
Center.
X Report the loss immediately to the vehicle insurers.
X If necessary, have the locks changed as well. You have lost the
mechanical key. X
Report the loss immediately to the vehicle insurers.
X If necessary, have the locks changed as well. The engine cannot be
started using KEYLESS-
GO. The SmartKey is in
the vehicle. Ad
oor is open. Therefore, the SmartKey cannot be detected as
easily.
X Close the door and try to start the vehicle again. There is interference from
apowerful source of radio waves.
X Start your vehicle with the SmartKey in the ignition lock. 66
SmartKeyOpening and closing
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Problem
Possible causes/consequences and
0050
0050Solutions The engine cannot be
started using the
SmartKey. The on-board voltage is too low.
X Switch off non-essential consumers, e.g. seat heating or interior
lighting, and try to start the engine again.
X Remove the SmartKey and reinsert it into the ignition lock.
X Start the engine within 30 seconds of insertingt he SmartKey
into the ignition lock.
X Repeatifn ecessary.
If this does not work: X Check the starter battery and charge it if necessary
(Y page 238).
or
X Jump-start the vehicle (Y page 242).
or
X Consult aqualified specialist workshop. The SmartKey cannot
be turned in the ignition
lock. The SmartKey has been in position
0for aconsiderable time.
X Remove the SmartKey and reinsert it into the ignition lock.
X Check the starter battery and charge it if necessary
(Y page 238).
X Start the engine. The on-board voltage is too low.
X Switch off non-essential consumers, e.g. seat heating or interior
lighting, and try to turn the SmartKey again.
If this does not work:
X Check the starter battery and charge it if necessary
(Y page 238).
or
X Jump-start the vehicle (Y page 242).
or
X Consult aqualified specialist workshop. SmartKey
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Doors
Important safet
ynotes G
WARNING
If children are lef tunsupervised in th evehicle,
they could:
R ope nthe doors ,thu se ndangerin gother
people or road users.
R get out and disrup ttraffic.
R operat ethe vehicle' sequipment.
Additionally, children could set th evehicle in
motion if, fo rexample, they:
R release th eparking brake.
R shiftin gthe automatic transmissio nout of
par kposition P
R Start th eengine.
There is ariskofana ccidentand injury.
Whe nleavin gthe vehicle, always take the
SmartKey wit hyou and loc kthe vehicle. Never
leav echildren or animals unattended in the
vehicle. Always keep th eSmartKey out of
reach of children. G
WARNING
Whe nleavin gthe vehicle, always remov ethe
SmartKey from th eignition lock. Always take
th eS martKey wit hyou and loc kthe vehicle.
Do no tleav echildren unsupervised in the
vehicle, eve niftheya re secure dinachild
restrain tsystem, and do no tgivet he ma ccess
to an unlocke dvehicle. Achild' su nsupervised
access to avehicle could result in an accident
and/o rserious personal injury. The ycould:
R injure themselves on vehicle parts
R be seriously or fatally injured by extreme
heat or cold
R injure themselves or hav eanacciden twith
vehicle equipmen ttha tm ay still be in oper-
ation eve nafter th eSmartKey has been
removed from th eignition ,suc hast heseat
adjustment, steerin gwhee ladjustmen tor
memor yfunction.
If children ope nadoor, they could cause
severe or eve nfatal injury to other persons; if they get out of th
evehicle, they could injure
themselves when doin gsoorbeseriously or
eve nfatally injured by any passin gtraffic.
Do no texposet he child restrain tsystem to
direc tsunlight. The child restrain tsystem's
metal parts ,for example, could becom every
hot ,and achild could be burne donthese
parts. G
WARNING
If objects ,luggage or load sare no tsecure dor
no tsecure dsufficiently, they could slip ,tip
over or be flun garound and thereby hit vehicle
occupants. There is ariskofi njury, particu-
larl yint he event of sudden braking or asud-
den chang eindirection.
Always stor eobjects so that they canno tbe
flun garound .Secureo bjects ,luggage or
load sagainst slippin gortippin gb efor ethe
journey. Unlockin
gand opening th edoors
from th eoutside
Coupe !
The doors swin
gupwards and out when
opened. Therefore, mak esuret hatthe re is
sufficien tclearanc eabov ethe vehicle. X
To ope nthe door: pointthe SmartKey
toward sdoorh andle 0043.
X Press the 0036buttonont heSmartKey.
Door handle 0043moves out.
X Lif tthe doo rbyd oorh andle 0043and swin git
up as far as it will go. 68
DoorsOpening an
dclosing
Page 71 of 290

X
To clos ethe door: pull the door down-
wards by the outer edge or the interio rdoor
handle. Swing the door down gently and
allo wittoe ngageint he lowe rposit ion.
X Lock the vehicl ewitht he SmartKe yifnec-
essar y(Ypage 62).
Roadster X
To ope nthe door: point the SmartKey
towards door handle.
X Press the 0036button on the SmartKey.
The door is unlocke dand can be opened.
X Pull the door handle. Unlockin
gand opening doors from
the inside
Coupe Yo
uc an onl yopenad oorfrom the insid eifit
is unlocked.
The vehicl eloc ks the doors automaticall yif
yo ud rive faster tha n9mph (15 km/h).
The doors ar eautomaticall yunlocke dafter a
journey if yo uswitch off the engine.
! The doors swing upwards and ou
twhen
opened. Therefore ,makes uret hatther eis
sufficient clearance above the vehicle. X
To unloc kthe doo rmanually: press
the 0036 button of centra lloc king 0087.
or X Pull locking knob 0043upwards. X
To ope nthe door: pull handle 0044.
X Swing the door upwards as fa rasitwillg o.
X To clos ethe door: pull the door down by
handle 0085.
X Allow the door to engag einthe lowe rposi-
tion.
X To lock the doo rmanually: press
the 0037 button of centra lloc king 0087.
or X Push locking knob 0043downwards.
Roadster Yo
uc an open adoorfrom insid ethe vehicle
eve nifith asbeen locked.
Onl yopent he door when the traffic situation
permits. X
Pull door handle 0044.
If the door is locked ,loc king knob 0043pops
up .The door is unlocke dand can be
opened.
i Whe
nad ooriso pened, the side window
on tha tsideo pens slightly. Whe nthe door
is closed ,the side windo wcloses again.
! The side windows will not open/close if
the battery is discharge dorifthe side win-
dows have ice dup.It will then not be pos-
sibl etoc lose the door. Do not attempt to
forc ethe door closed .You could otherwise
damage the door or the side window. Doors
69Opening and closing Z
Page 72 of 290

Centrally lockin
gand unlocking the
vehicle from th einside
You can centrally loc korunlock th evehicle
from th einside. This feature may be useful if,
for example ,you wish to unlock th efront-
passenger door from th einside or loc kthe
vehicle before you pull away.
Coupe: th ecentral locking/unlockin gbutton
does no tloc koru nlock th efuel fille rflap.
Roadster: th ecentral locking/unlockin gbut-
to nd oes no tloc koru nlock th efuel fille rflap
or th estowage compartments ,suc hast he
glov ebox. X
To lock: pressbutton 0044.
If bot hdoor sare closed, th evehicle locks.
X To unlock: pressbutton 0043.
You can open adoor from inside th evehicle
eve nifith as been locked. Only open th edoor
when th etraffic situatio npermits.
If th evehicle has been locke dwitht he central
lockin gbutton:
R and th eSmartKey is set to its factory set-
ting, th eentirev ehicle is unlocked if adoor
is opened from th einside.
R and th eSmartKey is set to an individual
setting, only th edoor that is opened from
inside th evehicle is unlocked. Automatic lockin
gfeature
Coupe You can only open
adoor from th einside if it
is unlocked.
The vehicle locks th edoor sautomaticall yif
you driv efaster than 9mph (15 km/h).
The door sare automaticall yunlocked after a
journey if you switch off th eengine.
Roadster The vehicle is locke
dautomaticall ywhen the
ignition is switched on and th evehicle's
wheels are moving at aspee dine xces sof
9m ph (15 km/h). Ther eistherefor eariskof
bein glocke dout when th evehicle is being
pushed, towed or tested on adynamometer. X
To deactivate: pressand hold button 0043
for about fiv eseconds until atones ounds.
X To activate: pressand hold button 0044for
about fiv eseconds until atones ounds.
i If you pres
sone of th etwo buttons and do
no th ear atone, ther elevan tsettin ghas
alread ybeen selected.
You can also switch th eautomatic locking
function on and off usin gthe on-board com-
puter (Y page 159). Unlocking th
edriver's door (mechan-
ical key)
If th evehicle can no longer be unlocked with
th eS martKey, use th emechanical key. 70
DoorsOpening and closing