2017 MERCEDES-BENZ SLC-Class change key battery

Locking/unlockingcentrally
You can start,lockorunlock thevehicle using
KEYLESS-GO .Todothis, you onl yneedc arry the
SmartKey with you. You can combine th efunc-
tions of KEYLESS-GO with those of aconven-
tional SmartKey. Unlockt hevehicle by using
KEYLESS-GO ,for instance, and lockitu singthe
& button on th eSmartKey.
The driver' sdoor and th edoor at whicht hehan-
dle is used, must bothbec losed. The SmartKey
must be outside th evehicle .When locking or
unlocking with KEYLESS-GO ,the distance
between th ekey and th ecorresponding door
handle must not be greater than 3ft(1m).
Ac heck whichp eriodicallyestablishesar adio
connectio nbetween th evehicle and th eSmart-
Key determine swhether avalid SmartKey is in
th ev ehicle .This occurs, for example:
Rwhen starting th eengine
Rwhile driving
Rwhen th eexternal door handles are touched
XTo unlock th evehicle: touch th einner sur-
fac eoft hedoor handle.
XTo lock th evehicle: touch sensor surface :
or ;.
Makes ure that you do not touch th einner
surface of th edoor handle.
XConvenience closing feature: touch
recesseds ensor surface ;for an extended
period.
Further informatio nontheconvenience clos-
ing feature (
Ypage 74).
Deactivating and activating
If you do not intend to use aSmartKey for an
extended perio doftime, you can deactivate the
KEYLESS-GO function of th ekey. The SmartKey
will then use veryl ittle power,therebyc onserv- ing battery power.F
or thepurposes of activa-
tion/deactivation, th evehicle must not be
nearby.
XTo deactivate: pressthe& button on the
SmartKey twic einrapid succession.
The battery check lamp (
Ypage 66 )ofthe
SmartKey flashes twic ebriefly and lightsu p
once, then KEYLESS-GO is deactivated.
XTo activate: pressany button on th eSmart-
Key.
or
XInsertt heSmartKey int othe ignitio nlock.
KEYLESS-GO and all of its associate dfeatures
are available again.
Changing th esettings of th elocking
system
You can change th esettings of th elockin gsys-
tem .This meanso nlyt he driver' sdoor,t helock-
able stowage compartments in th evehicle inte-
rior and th efuel filler flap are unlocked when the
vehicle is unlocked. This is useful if you fre-
quently travel alone.
XTo change th esetting: pressand hold down
the % and& buttons simultaneously
for about six second suntil th ebattery indica-
to rlamp (
Ypage 66 )flashes twice.
If th esettin goft helockin gsystem is changed
within th esignal range of th evehicle ,pressing
the & or% button:
Rlocks or
Runlock sthe vehicle
The SmartKey now functionsasf ollows:
XTo unlock:pressthe % button once.
XTo unlock centrally: pressthe % button
twice.
XTo lock centrally: pressthe& button.
The KEYLESS-GO function is changed as fol-
lows:
XTo unlock th edriver's door: touch theinner
surface of th edoor handle on th edriver's
door.
XTo unlock centrally: touch theinner surface
of th edriver or front-passenger door handle.
XTo lock centrally: touch theouter sensor
surface on one of th edoor handles.
64SmartKey
Opening and closing

Checking thebattery
XPress the &or% button.
The battery is working properl yifbattery
check lamp :lightsupb riefly.
The battery is discharged if battery check
lamp :does no tlight up briefly.
XChange th ebattery (Ypage 66).
If th eSmartKey battery is checked within the
signal reception range of th evehicle ,pressing
the & or% button:
Rlocks or
Runlock sthe vehicle
iYou can get abattery at any qualified spe-
cialist workshop.
Replacin gthe battery
You require aCR20253V cellbattery.
XTaket hemechanical ke yout of th eSmartKey
(Ypage 65).
XPress mechanical key ;intot he SmartKey
opening in th edirection of th earrow until bat-
tery compartmen tcover :opens. Do not
hold battery compartmen tcover :closed
while doings o.
XRemove battery compartmen tcover :.
XRepeatedly tap th eSmartKey against your
palm until battery =falls out.
XInsertt henewb attery witht hepositiv eter-
minal facing upwards. Use alint-free cloth to
do so.
XMakes ure that th esurface of th ebattery is
free of lint, grease and other contaminants.
XInsertt hefrontt absofb attery compartment
cover :intot he housing and then pres sto
close it.
XInsertm echanical key ;intot he SmartKey
(Ypage 65).
XCheckt hefunction of all SmartKey buttons on
th ev ehicle.
66SmartKey
Opening and closing

ProblemPossible causes/consequences andMSolutions
The engine cannot be
started using the Smart-
Key.The on-board voltage is too low.
XSwitch off non-essential consumers, e.g. seat heating or interior
lighting, and try to start the engine again.
If this does not work:
XCheck the starter battery and charge it if necessary (Ypage 248).
or
XJump-start the vehicle (Ypage 249).
or
XConsult aqualified specialist workshop.
The engine cannot be
started using KEYLESS-
GO. The SmartKey is in
the vehicle.The vehicle is locked.
XUnlock the vehicle and try to start the vehicle again.
The SmartKey battery is discharged or nearly discharged.
XCheck the SmartKey battery (Ypage 66) and replace it if necessary
(Ypage 66).
If this does not work:
XStart your vehicle with the SmartKey in the ignition lock.
There is interference from apowerful source of radio waves.
XStart your vehicle with the SmartKey in the ignition lock.
You have lost aSmart-
Key.XHave the SmartKey deactivated at aqualified 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.
Doors
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.
Rshifting the automatic transmission out of
park position P
RStart the engine.
There is arisk 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.
68Doors
Opening and closing

XPress button:repeatedly until the desired
heating level is set.
XTo switch off: press button:repeatedly
until all the indicator lamps go out.
iThe blower continues runnin gfor seven sec-
onds to cool down the heating elements.
iIf the battery voltage is too low, AIRSCARF
may switch off.
Problems with AIRSCARF
AIRSCARF has switched off prematurely or will
not switch on. The vehicle's electrical system
voltage is too low because too many electrical
consumers are switched on.
XSwitc hoff electrical consumers that you do
not need, such as the rear window defroster
or interior lighting.
XSwitc honA IRSCARF again.
Steering wheel
Important safety notes
GWARNING
You could lose control of your vehicle if you do the following while driving:
Radjust the driver's seat, head restraint,
steerin gwheel or mirrors
Rfasten the seat belt
There is arisk of an accident.
Adjust the driver's seat, head restraint, steer-
ing wheel and mirror and fasten your seat belt before starting the engine.
GWARNING
Children could injure themselves if they
adjust the steerin gwheel. There is arisk of
injury.
When leaving the vehicle, alwayst ake the
SmartKey with you and lock the vehicle. Never
leave children unsupervised in the vehicle.
The electrically adjustable steerin gwheel can
still be adjusted when there is no SmartKey in
the ignition lock.
Adjusting the steering wheel man-
ually
GWARNING
If the steerin gwheel is unlocked while the
vehicle is in motion ,itcould change position
unexpectedly. This could cause you to lose
control of the vehicle. There is arisk of an
accident.
Before starting off, make sure the steering
wheel is locked. Never unlock the steering
wheel while the vehicle is in motion.
:Release lever
;Adjust sthe steerin gwheel height
=Adjust sthe steerin gwheel position (fore-
and-aft adjustment)
XPush release lever :down completely in the
direction of the arrow.
The steerin gcolumn is unlocked.
XAdjust the steerin gwheel to the desired posi-
tion.
XPush release lever :up completely.
The steerin gcolumn is locked.
XCheck if the steerin gcolumn is locked. When
doing so, try to push the steerin gwheel up or
down or try to move it in the fore-and-aft
direction.
86Steering wheel
Seats, steering wheel and mirrors

Interior lighting
Overview of interior lighting
Overhead control panel
:
pSwitches th eleft-han dreading lamp
on/off
;| Switches th eautomatic interio rlight-
ing control on/off
=p Switches th eright-hand reading lamp
on/off
?c Switches th einterio rlighting on/off
Interior lighting control
General notes
In order to preven tthe vehicle's battery from
discharging ,the interio rlighting function sare
automatically deactivated after som etime
unless th eSmartKey is in position 2in th eigni-
tion lock.
The color and brightness of th eambien tlighting
are set usin gthe multimedia system
(
Ypage 172).
Automati cinterior lighting control
XTo switch on/off: press the| button.
When th eautomatic interio rlighting control is
activated, th ebutto nisf lushw itht he over-
head control panel.
The interio rlighting automatically switches on if
you:
Runlock th evehicl e
Ropen adoor
Rremove th eSmartKey from th eignition loc k
The interio rligh tisa ctivated for ashort while
when th eSma rtKey is remove dfromt heignition lock. You can activat
ethisd elaye dswitch-off
usin gthe on-board computer (
Ypage 173).
Replacingbulbs
Important safety notes
Halogen bulbs
GWARNIN G
Bulbs, lamp sand connectors can get ver yhot
when operating .Ifyou chang eabulb, you
could burn yourself on these components.
Ther eisar iskofi njury.
Allow these component stocooldown before
changing abulb.
Do no tuse ab ulb that has been dropped or if it s
glass tub ehas been scratched.
The bulb may explod eif:
Ryou touch it
Rit is hot
Ryou dro pit
Ryou scratch it
Only operate bulbs in enclosed lamp sdesigned
for that purpose .Onlyi nstal lspar ebulbs of th e
sam etypea nd th especifie dvoltage.
Mark sont heglass tub ereduce th eservic elife
of th ebulbs .Don ottouch th eglass tub ewith
your bare hands. If necessary, clean th eglass
tub ew hen cold wit halcohol or spirit and rub it
off wit halint-free cloth .
Protect bulbs from moisture during operation .
Do no tallow bulbs to come int ocontac twith
liquids.
Replac eonlyt he bulbs listed (
Ypage 98).
Hav ethe bulbs that you canno treplace yourself
changed at aqualified specialist workshop.
If you require assistanc echanging bulbs ,con -
sult aqualified specialist workshop.
If th enew bulb still does no tligh tup, consult a
qualified specialist workshop.
Bulb sand lamp sare an important aspect of
vehicl esafety. You must therefor emakes ure
that these function correctl yatall times
.Ha
v e
th eh eadlamp setting checke dregularly.
Replacingb ulbs97
Lightsand windshield wipers
Z

Display messagesPossible causes/consequences andMSolutions
Â
ReplaceKey Batter y
The SmartKey battery is discharged.
XChange thebattery (Ypage 66) .
Â
Don't Forget You rKey
The SmartKey is notintheignition lock. You hav eopened th edriver's
door wit hthe engin eswitched off .
The multifunction display shows th edisplay message amaximum of
60 seconds and is simply areminder.
XTak ethe SmartKey wit hyou when you leav ethe vehicle.
Â
Key Not Detected(redd isplay message )
The SmartKey is no tinthevehicle.
Aw arning tone also sounds.
If th eengineiss witched off ,you can no longer loc kthe vehicl ecen-
trally or start th eengine.
XPull ove rand stop th evehicl esafely as soo naspossible, payin g
attention to roa dand traffic conditions.
XSecur ethe vehicl eagainst rollin gaway (Ypage 131).
XLocate th eSmartKey.
XPress aon thesteering whee ltoc onfir mthedisplay message .
Becausethe re is interferenc efromas tron gs ource of radi owaves, th e
SmartKey is no tdetecte dwhilstthe engin eisrunning.
Aw arning tone also sounds.
XPull ove rand stop th evehicl esafely as soo naspossible, payin g
attention to roa dand traffic conditions.
XSecur ethe vehicl eagainst rollin gaway (Ypage 131).
XInser tthe SmartKey int othe ignition loc kand bring int okeymode.
Â
Key Not Detected(whit edisplay message )
The SmartKey is currentl yundetected.
XChange th elocation of th eSmartKey in th evehicle.
If th eSmartKey still canno tbedetected:
XInsertthe SmartKey int othe ignition loc kand tur nittot hedesire d
position .
Â
Remove 'Start 'But‐ton and Insert Key
The SmartKey is continually undetected.
KEYLESS-GO is temporarily malfunctioning or is defective. Awarning
tone also sounds.
XInser tthe SmartKey int othe ignition loc kand tur nittot hedesire d
position .
XVisitaqualified specialist workshop .
Warning and indicat orlamps
Gene raln otes
Some systems carry out aself-diagnosis when th eignition is switched on .Therefore ,som eindicator
and warning lamp smay ligh tuporf lashtem porarily. This behavio risnon-criti cal.These indicator
202Warning andi ndicator lamps
On-board computera nd displays