2017 MERCEDES-BENZ SLC-Class battery

Problems with the SmartKey
ProblemPossible causes/consequences andMSolutions
You can no longer lock or
unlock the vehicle using
the SmartKey.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:
XUnlock (Ypage 70) or lock (Ypage 70) the vehicle using the
mechanical key.
There is interference from apowerful source of radio waves.
XUnlock (Ypage 70) or lock (Ypage 70) the vehicle using the
mechanical key.
The SmartKey is faulty.
XUnlock (Ypage 70) or lock (Ypage 70) the vehicle using the
mechanical key.
XHave the SmartKey checked at aqualified specialist workshop.
You can no longer lock or
unlock the vehicle using
KEYLESS-GO.KEYLESS-GO was deactivated.
XReactivate KEYLESS-GO (Ypage 63).
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:
XUnlock (Ypage 70) or lock (Ypage 70) the vehicle using the
mechanical key.
There is interference from apowerful source of radio waves.
XUnlock (Ypage 70) or lock (Ypage 70) the vehicle using the
mechanical key.
KEYLESS-GO is malfunctioning.
XLock/unlock the vehicle using the remote control function of the
SmartKey.
XHave the vehicle and SmartKey checked at aqualified specialist
workshop.
If the vehicle can also not be locked/unlocked using the remote con-
trol function:
XUnlock (Ypage 70) or lock (Ypage 70) the vehicle using the
mechanical key.
XHave the vehicle and SmartKey checked at aqualified specialist
workshop.
SmartKey67
Opening and closing
Z

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

Unlocking and opening doors from
the inside
!
The side windows will not open/close if the
battery is discharged or if the side windows
have iced up. It will then not be possible to
close the door. Do not attempt to forcet he
door closed. You could otherwise damage the
door or the side window.
You can open adoor from inside the vehicle
even if it has been locked.
If the vehicle has previously been locked from
the outside, openin gadoor from the inside will
trigger the anti-theft alarm system .Switc hoff
the alarm (
Ypage 61).
XPull door handle ;.
If the door is locked, locking knob :pops up.
The door is unlocked and can be opened.
When adoor is opened, the side window on that
side opens slightly. When the door is closed, the
side window closes again.
Centrally locking and unlocking the
vehicle from the inside
You can centrally lock or unlock the vehicle from
the inside. For example, you can unlock the
front-passenge rdoor from the inside or lock the
vehicle before you pull away.
XTo unlock: press button :.
XTo lock:press button ;.
If the front-passenge rdoor is closed, the vehi-
cle locks.
The central locking button does not lock or
unlock the fuel filler flap or the stowage com-
partment in the center console.
You cannot unlock the vehicle centrally from the
inside if the vehicle has been locked with the
SmartKey or KEYLESS-GO.
You can open adoor from inside the vehicle
even if it has been locked.
If al ocked door is opened from the inside, the
previous unlock status of the vehicle will be
taken int oconsideratio nif:
Rthe vehicle was locked using the locking but-
ton for the central locking, or
Rif the vehicle was locked automatically
The vehicle will be fully unlocked if it had previ-
ously been fully unlocked. If only the driver's
door had been previously unlocked, only the
door which has been opened from the inside is
unlocked.
Automatic locking feature
Doors69
Opening and closing
Z

tion2.S imultaneouslyp ullthe trunk li dhan-
dle.
The trunk is unlocked.
XTurn the mechanica lkey back to position 1
and remove it.
XInsert the mechanica lkey into the SmartKey.
Trunk emergenc yrelease
Youc an unlock the trunk li dfromt he insid ewith
the emergency release button.
XPress emergency release button :briefly.
The trunk li dunlocks and opens.
The trunk li dcan be unlocke dand opene dwith
the trunk li demergency release when the vehi-
cle is stationar yorwhiledriving.
The trunk li demergency release does not unlock
the trunk li difthe battery is disconnecte dor
discharged.
Trunk li demergency release light:
REmergency release button :flashe sfor
30 minute safter the trunk li disopened
REmergency release button :flashe sfor
60 minute safter the trunk li disclosed
Side windows
Important safety notes
GWARNING
Whil eopening the side windows ,bod yp arts
could become trapped between the side win-
do wa nd the door frame as the side window
moves .There is ariskofi njury.
Make sure thatn obodytouche sthe side win-
do wd uringt he opening procedure. If some-
body become strapped ,release the switch or
pull the switch to close the side windo wagain .
GWARNING
Whil eclosing the side windows ,bod yp arts in
the closing area could become trapped .There
is ar iskofi njury.
When closing make sure thatnop arts of the
body ar einthe closing area .Ifsomebody
become strapped ,release the switch or press
the switch to open the side windo wagain .
GWARNING
If children operate the side windows they
could become trapped ,particularly if theya re
left unsupervised .There is ariskofi njury.
When leaving the vehicle, always take the
SmartKeyw ithy ou and lock the vehicle. Never
leav echildren unsupervised in the vehicle.
Side windo wreversin gfeature
The front side windows ar eequippe dwitha n
automatic reversing feature. If asolid object
blocks or restricts the upward movement of one
of the front side windows durin gthe closing
process, the side windo wopens agai nautomat-
ically. During the manua lclosing process, the
side windo wonlyo pens agai nautomatically
after the corresponding switch is released. How-
ever, the automatic reversing featur eisonlya n
ai da nd does not relieve yo uofthe responsibility
of paying attentio nwhenc losing asidew indow.
GWARNING
The reversing featur edoesn ot react:
Rto soft, light and thino bjects ,e.g.s mall fin-
gers
Rove rthe last 1/6 in(4 mm) of the closing
movement
Rdurin gresetting
Rwhen closing the side windo wagain man-
uall yimm ediatel yafter automatic reversing
Thi sm eans thatt he reversing featur ecannot
prevent someone being trapped in these sit-
uations. There is ariskofi njury.
72Side windows
Openin gand closing

You can adjust the contour of the seat backrests
individually to provide optimum support for your
back.
Switching theseat heating on/off
Switching on/off
GWARNING
Repeatedly switching on the seat heatin gcan
cause the seat cushio nand backrest pads to
becom every hot.T he health of personsw ith
limited temperature sensitivity or alimited
ability to react to excessively high tempera-
ture smay be affected or the ymay even suffer
burn-like injuries. There is arisk of injury.
Therefore, do not switc hthe seat heatin gon
repeatedly.
Driver'sa nd front-passenger seat
The three red indicator lamps in the button indi-
cat ethe heatin glevel you have selected.
The syste mautomatically switches down from
level 3to level 2afte rapproximately eight
minutes.
The syste mautomatically switches down from
level 2to level 1afte rapproximately ten
minutes.
The syste mautomatically switches off approx-
imately 20 minutes afte ritisset to level 1.
XMake sure that the SmartKey is in position 1
or 2in the ignition lock.
XTo switch on: press button:repeatedly
until the desired heatin glevel is set.
XTo switch off: press button:repeatedly
until all the indicator lamps go out.
Problem swith th eseat heating
The seat heatin ghas switched off prematurely
or cannot be switched on. The vehicle's electri-
cal syste mvoltage is too low because too many
electrical consumers are switched on.
XSwitch off electrical consumers that you do
not need, such as the rear window defroster
or interior lighting.
XOnc ethe battery is sufficiently charged,
switc hont he seat heatin gagain.
AIRSCARF
Switching on/off
GWARNING
When AIRSCARF is switched on, very hot air
can flow from the vents in the head restraints. This could result in burns in the immediate
vicinity of the air vents. There is arisk of injury.
Reduce the heater output beforeitb ecomes
too hot.
The AIRSCARF function warms the head and
nec karea of vehicle occupant swith warm air.
The warm air flows out of the holes in the head
restraints.
The three red indicator lamps in the button indi-
cat ethe heatin glevel you have selected.
XMake sure that the SmartKey is in position 2
in the ignition lock.
XTo switch on: press button:.
Three red indicator lamps in the button light
up. The blower starts up afte rapreheating
phase of seven seconds.
Seats85
Seats, steering wheel and mirrors
Z

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

The daytime runninglamps improve the visibility
of your vehicle during the day. To do this, the
daytime runnin glamps function must be
switched on using the on-board computer
(
Ypage 172).
If the engine is runnin gand you turn the light
switch to TorL,t he manual settings
take precedenceo ver the daytime running
lamps.
Low-beam headlamps
GWARNING
When the light switch is set to Ã,the low-
beam headlamps may not be switched on
automatically if there is fog, snow or other
causes of poor visibility due to the weather
conditions such as spray. There is arisk of an
accident.
In such situations, turn the light switch to
L.
Even if the light sensor does not detect that it is
dark, the parking lamps and low-beam head-
lamps switch on when the ignition is switched on and the light switch is set to the Lposition.
This is aparticularly useful function in the event
of rain and fog.
XTo switch on the low-beam headlamps:
turn the SmartKey in the ignition lock to posi- tion 2or start the engine.
XTurn the light switch to L.
The green Lindicator lamp in the instru-
ment cluster lights up.
Rear fog lamp
The rear fog lamp improves visibility of your
vehicle for the traffic behind in the event of thick
fog. Please take noteoft he country-specific
regulations for the use of rear fog lamps.
XTo switch on the rear fog lamps: turn the
SmartKey to position 2in the ignition lock or
start the engine.
XTurn the light switch to LorÃ.
XPress the Rbutton.
The yellow Rindicator lamp in the instru-
ment cluster lights up.
XTo switch off the rear fog lamp: press the
R button.
The yellow Rindicator lamp in the instru-
ment cluster goes out.
Parking lamps
!If the battery charge is very low, the parking
lamps or standin glamps are automatically
switched off to enable the next engine start.
Always park your vehicle safely and suffi-
ciently lit according to legal standards. Avoid
using the parking lamps Toveraperiod of
several hours. If possible, switch on the right-
hand X or left-hand Wstandin glamp.
XTo switch on: turn the light switch to T.
The green Tindicator lamp in the instru-
ment cluster lights up.
Standing lamps
Switching on the standin glamps ensures the
corresponding side of the vehicle is illuminated.
XTo switch on the standing lamps: the
SmartKey is not in t
he ignition lock or it is in
position 0.
XTurn the light switch to W(left-han dside of
the vehicle) or X(right-hand side of the
vehicle).
Combination switch
:High-beam headlamps
;Turn signal, right
=High-beam flasher
?Turn signal, left
XTo indicate briefly: press the combination
switch briefly to the pressure point in the
direction of arrow ;or?.
The corresponding turn signal flashes three
times.
XTo indicate: press the combination switch
beyond the pressure point in the direction of
arrow ;or?.
94Exterior lighting
Lights and windshield wipers

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