key MERCEDES-BENZ SLC 2017 User Guide

Introduction The printe dO perator's Manual provide si nfor-
mation about th es af eo peration of your vehicle.
The Digital Operator's Manual provide sc om pre-
hensiv ea nd specifically adapted information on
your vehicle's equipmen ta nd multimedia sys-
tem. You can call up th eD ig ital Operator's Man -
ual via th em ultimedia system.
i You will no ti ncur any cost sw hen calling up
th eD ig ital Operator's Manual. The Digital
Operator's Manual works without connecting
to th eI nternet.
Ther ea re three ways to access th et op ic soft he
Digital Operator's Manual: R
Visua ls earch
The visual search allows you to explor ey our
vehicl e" virtually". Starting from either th e
vehicl ee xter io rv ie wori nterio rv iew, you can
access man yoft he differen tt op ic sc ov ered
by th eD ig ital Operator's Manual. To access
th ev ehicl ei nterio rs ection ,s elect th e" Vehi-
cle interior" view. R
Keywor ds earch
The keyword search allows you to search for a
keyword by enterin gc ha racters.R
Content s
You can select individual section sint he con-
tents.
i The Digital Operator's Manual is deactiva-
te df or safet yr eason sw hile driving .
Operation
Calling up th eD igital Operator's Man-
ual X
Press th e

Panic alarm X
To activate: press 3 button C for at
least one second.
Av isual and audible alarm is triggered if the
alarm system is armed. X
To deactivate: press 3 button C again.
or X
Insert the SmartKey into the ignition lock.
or X
Press the KEYLESS-GO Start/Stop button.
The KEYLESS-GO key must be in the vehicle.
Occupant safety
Introduction to the restraint system The restraint system can reduce the risk of vehi-
cle occupants coming into contact with parts of
the vehicle's interior in the event of an accident.
The restraint system can also reduce the forces
to which vehicle occupants are subjected during
an accident.
The restraint system comprises: R
seat belt system R
air bags
The components of the restraint system work in
conjunction with each other. They can only
deploy their protective function if, at all times, all
vehicle occupants: R
have fastened their seat belts correctly
( Y
page 40) R
have adjusted their seat and head restraint
properly ( Y
page 82).
As the driver, you also have to make sure that
the steering wheel is adjusted correctly.
Observe the information relating to the correct
driver's seat position ( Y
page 82). You also have to make sure that an air bag can
inflate properly if deploye d( Y
page 42).
An air bag supplements ac orrectly worn seat
belt. As an additional safety device, the air bag
increases the level of protection for vehicle
occupants in the event of an accident. For exam-
ple, if, in the event of an accident, the protection
offered by the seat belt is sufficient, the air bags
are not deployed. When an accident occurs, only
the air bags that increase protection in that par-
ticular accident situation are deployed. How-
ever, seat belts and air bags generally do not
protect against object sp enetrating the vehicle
from the outside.
Information on restraint system operation can
be found under "Triggering of the Emergency
Tensioning Devices and air bags" ( Y
page 48).
For information on children traveling with you in
the vehicle and on child restraint systems, see
"Children in the vehicle" ( Y
page 51).
Important safety notes
G WARNING
Modifications to the restraint system may
cause it to no longer work as intended. The
restraint system may then not perform its
intended protective function and may fail in an
accident or trigger unexpectedly, for example.
This poses an increased risk of injury or even
fatal injury.
Never modify parts of the restraint system.
Never tamper with the wiring, the electronic
components or their software.
If it is necessary to modify components of the
restraint system to accommodate ap erson
with disabilities, contact an authorized
Mercedes-Benz Center for details. USA only:
for further information contact our Customer
Assistanc eC enter at 1-800-FOR-MERCedes
(1 ‑ 800 ‑ 36 7 ‑ 6372).
Restraint system warning lamp
The functions of the restraint system are
checked after the ignition is switched on and at
regular intervals while the engine is running.
Therefore, malfunction sc an be detected in
good time.Occupant safety 37
Safety Z

G WARNING
The seat belts may not perform their intended
protective function if: R
they are damaged, modified, extremely
dirty ,b leached or dyedR
the seat bel tb uckle is damaged or
extremely dirty R
the Emergency Tensioning Devices, belt
anchorages or inertia reel sh ave been modi-
fied.
Seat belts may be damaged in an accident,
although the damage may not be visible, e.g.
due to splinters of glass. Modified or damaged
seat belts may tear or fail ,e .g. in an accident.
Modified Emergency Tensioning Devices
coul da ccidentally trigger or fail to deploy
when necessary. This pose sani ncreased risk
of injury or even fatal injury.
Never modify the seat belts, Emergency Ten-
sioning Devices, bel ta nchorages and inertia
reels. Make sure that the seat belts are
undamaged, not worn out and clean. Follow-
ing an accident, have the seat belts checked
immediatel yataq ualified specialist work-
shop.
Only use seat belts that have been approved for
you rv ehicl ebyM ercedes-Benz.
Proper use of the seat belts Observe the safety notes on the seat belt
( Y
pag e3 9).
All vehicl eo ccupants must be wearing the seat
bel tc orrectly before beginning the journey .A lso
make sure that all vehicl eo ccupants are always
wearing the seat bel tc orrectly while the vehicle
is in motion.
When fastening the seat belt, alway sm ake sure
that: R
the seat bel tt ongue is only inserted to the belt
buckle belonging to that seat. R
the seat bel tist ight across you rb ody.
Avoid wearing bulky clothing, e.g. aw inter
coat. R
the seat bel tisn ot twisted.
Only then can the forces which occur be dis-
tributed over the area of the belt. R
the shoulde rs ection of the bel tisa lways
routed across the center of you rs houlder.
The shoulde rs ection of the bel tm ust not
come into contact with you rn eck or be routed
under you ra rm. R
the lap bel tp asses tightly and as low dow na s
possible across you rl ap.
The lap bel tm ust alway sber outed across
you rh ip joints and not across you ra bdomen.
This applie sp articularl ytop regnant women.
If necessary, pus ht he lap bel td ow ntoy our
hip joint and pul litt ight using the shoulder
section of the belt. R
the seat bel tisn ot routed across sharp ,p oin-
ted or fragile objects.
If you have such items located on or in your
clothing, e.g. pens, keys or eyeglasses, store
these in as uitable place. R
only one perso nisu sing as eat bel tata time.
Infants and children must never travel sitting
on the lap of av ehicl eo ccupant. In the event
of an accident, they coul dbec rushed
between the vehicl eo ccupant and seat belt.R
objects are never secure dw ith as eat bel ti f
the seat bel tisa ls ob eing used by one of the
vehicle's occu pa nts.
Also ensure that there are never objects
between ap erso na nd the seat, e.g. cushions.
Seat belts are only intended to secure and
restrai nv ehicl eo ccupants. Always observe the
notes in the "Stowage options/compartments"
section for securing objects, luggage or loads
( Y
pag e2 17).
Fastening seat belts Observe the safety notes on the seat belt
( Y
pag e3 9) and the notes on correct use of seat
belts ( Y
pag e4 0).40
Occupant safety
Safety

If the front passenger does not observe these
conditions, OCS may produce af alse classifica-
tion, e.g. because the front passenger: R
transfers their weight by supporting them-
selves on av ehicle armrestR
sits in such aw ay that their weight is raised
from the seat cushion
If you install ac hild restraint system on the
front-passenger seat, be sure to observe the
correct positioning of the child restraint system.
Never place objects under or behind the child
restraint system, e.g. ac ushion. The entire base
of the child restraint system must always rest on
the seat cushio noft he front-passenger seat.
The backrest of the forward-facing child
restraint system must lie as flat as possible
against the backrest of the front-passenger
seat.
The child restraint system must not touch the
roof or be subjected to al oad by the head
restraint. Adjust the angle of the seat backrest
and the head restraint positio na ccordingly.
Only then can OCS be guaranteed to function
correctly. Alway so bserve the child restraint sys-
tem manufacturer's installation and operating
instructions.
Occupant Classification System opera-
tion (OCS)
C
PASSENGER AIR BAG ON indicator lamp
D
PASSENGER AIR BAG OFF indicator lamp
The indicator lamp si nform you whether the
front-passenger front air bag is deactivated or
enabled. X
Press the Start/Stop button once or twice, or
turn the SmartKey to position 1 or 2 in the
ignition lock.
The system carries out self-diagnostics. The PASSENGER AIR BAG OFF and PASSENGER
AIR BAG ON indicator lamp sm ust ligh tu ps imul-
taneousl yf or approximately six seconds.
The indicator lamp sd isplay the status of the
front-passenger front air bag. R
PASSENGER AIR BAG ON lights up: the front-
passenger front air bag is enabled. If, in the
event of an accident, all deployment criteria
are met, the front-passenger front air bag is
deployed. R
PASSENGER AIR BAG OFF lights up: the front-
passenger front air bag is deactivated. It will
then not be deployed in the event of an acci-
dent.
If the status of the front-passenger front air bag
changes whil et he vehicle is in motion, an air bag
display messag ea ppears in the instrument clus-
ter ( Y
page 187). When the front-passenger
seat is occupied, always pay attention to the
PASSENGER AIR BAG ON and PASSENGER AIR
BAG OFF indicator lamps. Be aware of the status
of the front-passenger front air bag both before
and during the journey.
G WARNING
If the PASSENGER AIR BAG OFF indicator
lamp is lit, the front-passenger front air bag is
disabled .Itw il ln ot be deployed in the event of
an accident and cannot perform its intended
protective function. Ap erson in the front-
passenger seat could then, for example ,c ome
into contact with the vehicle's interior, espe-
ciall yift he person is sitting too close to the
dashboard. This poses an increased risk of
injury or even fatal injury.
When the front-passenger seat is occupied,
always ensure that: R
the classification of the person in the front-
passenger seat is correct and the front-
passenger front air bag is enabled or disa-
bled in accordance with the person in the
front-passenger seat R
the front-passenger seat has been moved
back as far back as possible. R
the person is seated correctly.
Make sure, both before and during the jour-
ney, that the status of the front-passenger
front air bag is correct.Occupant safety 45
Safety Z

G WARNING
If you leave children unsupervised in the vehi-
cle, they coul ds et it in motion by, for example:R
release the parking brake. R
shift the automatic transmission out of the
parking position P .R
start the engine.
In addition, they may operate vehicl ee quip-
ment and become trapped. There is ar isk of
an accident and injury.
When leaving the vehicle, alway st ake the
SmartKey with you and lock the vehicle. Never
leave children unsupervised in the vehicle.
G WARNING
If persons, particularl yc hildren are subjected
to prolonged exposure to extreme hea to r
cold, there is ar isk of injury ,p ossibly even
fatal .N ever leave children unattended in the
vehicle.
G WARNING
If the child restraint system is subjected to
direct sunlight, parts may get very hot. Chil-
dren may burn themselves on these parts,
particularl yont he metal parts of the child
restraint system. There is ar isk of injury.
If you leave the vehicle, taking the child with
you ,a lway se nsure that the child restraint
system is not expose dtod irect sunlight. Pro-
tect it with ab lanket, for example. If the child
restraint system has been expose dtod irect
sunlight, let it cool dow nb efore securing the
child in it. Never leave children unattended in
the vehicle.
Always ensure that all vehicl eo ccupants have
their seat belts fastened correctly and are sitting
properly .P articular attention must be pai dt o
children.
Observe the safety notes on the seat belt
( Y
pag e3 9) and the notes on correct use of seat
belts ( Y
pag e4 0).
Ab ooster seat may be necessary to achieve
prope rs eat bel tp ositioning for children over
41 lbs (18 kg )u ntil they reach ah eight where a three-point seat bel tc an be properly fastened
without ab ooster seat.
Special seat bel tr etractor
G WARNING
If the seat bel tisr eleased while driving, the
child restraint system wil lnol onger be
secure dp roperly .T he special seat bel tr etrac-
tor is disable da nd the inertia real draw sina
portion of the seat belt. The seat bel tc annot
be immediatel yr efastened. There is an
increased risk of injury ,p ossibly even fatal.
Stop the vehicl ei mmediately, paying atten-
tion to road and traffic conditions. Reactivate
the special seat bel tr etractor and secure the
child restraint system properly.
The seat bel tont he front-passenge rs ide is
equipped with as pecial seat bel tr etractor.
When activated, the special seat bel tr etractor
ensure st hat the seat bel tw il ln ot slacken once
the child restraint system has been secured.
Installing ac hild restraint system: X
Always comply with the child restraint system
manufacturer's installation instructions. X
Pul lt he seat bel ts moothly out of the belt
loop. X
Engage the seat bel tt ongue in the bel tb uckle.
Activating the special seat bel tr etractor:X
Pul lt he seat bel to ut full ya nd let the inertia
reel retract it again.
Whil et he seat bel tisr etracting, you should
hear ar atcheting sound .T he special seat belt
retractor is activated. X
Push the child seat restraint system dow ns o
that the seat bel tist ight and does not loosen.
Removing ac hild restraint system and deacti-
vating the special seat bel tr etractor:X
Always comply with the child restraint system
manufacturer's installation instructions. X
Press the release button of the bel tb uckle,
hold the bel tt ongue firmly and guide it back
toward sb el tl oop.
The special seat bel tr etractor is deactivated.52
Children in the vehicle
Safety

X
To arm: lock the vehicl ew it ht he SmartKey or
KEYLESS-GO.
Indicato rl am p C flashes. The alarm system
is armed afte ra pp roximatel y1 5s econds.X
To disarm: unlock the vehicl ew it ht he Smart-
Key or KEYLESS-GO.
Av isua la nd audibl ea la rm is triggered if the
alarm system is armed and yo uo pe n:R
ad oo rR
the vehicl ew it ht he mechanical keyR
the trunk lid R
the hood R
the glove box R
the stowag es pace under the armrestX
To turn the alarm off with the SmartKey:
press the 6 or 7 button on the Smart-
Key.
The alarm is switched off.
or X
Insert the SmartKey into the ignition lock.
The alarm is switched off. X
To sto pt he alarm using KEYLESS-GO:
grasp the outsid ed oo rh an dle. The SmartKey
must be outsid et he vehicle.
The alarm is switched off.
or X
Press the Start/Stop button on the dash-
board .T he SmartKey must be insid et he vehi-
cle.
The alarm is switched off.
The alarm is not switched off, eve nify ou close
the open door tha tt riggered it, for example.
i If the alarm continue sf or more than
30 seconds ,t he mbrace emergency cal ls ys -
tem automaticall yn otifie st he Customer
Assistance Center. Thi sisd on ee it her by text
message or data connection. The emergency
cal ls ys tem send st he message or data provi-
de dt hat: R
yo uh av es ub scribed to the mbrace service.R
the mbrace service ha sb ee na ctivated
properly. R
the necessary mobil ep hone network is
available.62
Protectio na gains tt heft
Safety

SmartKey
Important safety notes
G WARNING
If children are left unsupervised in the vehicle,
they could: R
open the doors, thus endangering other
people or road users. R
get out and disrupt traffic. R
operate the vehicle's equipment.
Additionally, children could set the vehicle in
motion if, for example, they: R
release the parking brake. R
shifting the automatic transmission out of
park position PR
Start the engine.
There is ar isk 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.
G WARNING
If you attach heavy or large object stot he
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 object stot he
SmartKey. Remove any bulky key rings before
insertin gt he SmartKey into the ignition lock.
! Keep the SmartKey away from stron gm ag-
netic fields. Otherwise, the remote control
function could be affected.
Strong magnetic fields can occur in the vicin-
ity of powerful electrical installations.
Do not keep the SmartKey: R
with electronic devices, e.g. am obile phone
or another SmartKey. R
with metallic objects, e.g. coins or metal foil. R
inside metallic objects, e.g. am etal case.
This can affect the functionality of the Smart-
Key. SmartKey functions
C
7 Locks the vehicleD
T Unlock st he trunk lid

Locking/unlockin gc entrallyYou can start ,l oc koru nlock th ev ehicle using
KEYLESS-GO .Todot hi s, you onl yn ee dc arry the
SmartKey with you. You can combine th ef unc-
tions of KEYLESS-GO with those of ac onven-
tional SmartKey. Unloc kt he vehicle by using
KEYLESS-GO ,f or instance, and loc kitu sin gt he
7 button on th eS ma rtKey.
The driver' sd oor and th ed oor at whic ht he han-
dle is used, must bot hbec losed. The SmartKey
must be outside th ev ehicle .W hen locking or
unlocking with KEYLESS-GO ,t he distance
between th ek ey and th ec orresponding door
handle must not be greater than 3ft(1m ).
Ac heck whic hp eriodicall ye stablishe sar adio
connectio nb etween th ev ehicle and th eS ma rt-
Key determine sw hether av alid SmartKey is in
th ev ehicle .T his occurs, for example:R
when starting th ee ngineR
while driving R
when th ee xternal door handles are touched
X
To unlock th ev ehicle: touch th ei nner sur-
fac eoft he door handle.X
To lock th ev ehicle: touch sensor surface C
or D .
Mak es ure that you do not touch th ei nner
surface of th ed oor handle.X
Convenience closing feature: touch
recesse ds ensor surface D for an extended
period.
Further informatio nont he convenience clos-
ing feature ( Y
page 74).
Deactivating and activating
If you do not intend to use aS ma rtKey for an
extended perio doft ime, you can deactivate the
KEYLESS-GO function of th ek ey. The SmartKey
will then use ver yl ittle power ,t he reb yc onserv- ing battery power .F or th ep urposes of activa-
tion/deactivation, th ev ehicle must not be
nearby. X
To deactivate: pres st he 7 button on the
SmartKey twic einr apid succession.
The battery check lamp ( Y
page 66 )oft he
SmartKey flashes twic eb riefly and light su p
once, then KEYLESS-GO is deactivated. X
To activate: pres sa ny button on th eS ma rt-
Key.
or X
Inser tt he SmartKey int ot he ignitio nl ock.
KEYLESS-GO and all of its associate df eatures
are available again.
Changing th es ettings of th el ocking
system You can change th es ettings of th el ockin gs ys-
tem .T his mean so nl yt he driver' sd oor ,t he lock-
able stowage compartments in th ev ehicle inte-
rior and th ef uel filler flap are unlocked when the
vehicle is unlocked. This is useful if you fre-
quently travel alone. X
To change th es etting: pres sa nd hold down
the 6 and 7 buttons simultaneously
for about six second su ntil th eb attery indica-
to rl amp ( Y
page 66 )f lashes twice.
If th es ettin goft he lockin gs ystem is changed
within th es ignal range of th ev ehicle ,p ressing
the 7 or 6 button: R
locks or R
unlock st he vehicle
The SmartKey now function sasf ollows:X
To unlock: pres st he 6 button once.X
To unlock centrally: pres st he 6 button
twice. X
To lock centrally: pres st he 7 button.
The KEYLESS-GO function is changed as fol-
lows: X
To unlock th ed ri ver's door: touch th ei nner
surface of th ed oor handle on th ed river's
door. X
To unlock centrally: touch th ei nner surface
of th ed river or front-passenger door handle. X
To lock centrally: touch th eo uter sensor
surface on one of th ed oor handles.64
SmartKey
Opening and closing

X
To restore the factory settings: press and
hol dd ow nt he 6 and 7 buttons simul-
taneousl yf or approximatel ys ix seconds until
the battery check lamp ( Y
page 66 )f lashes
twice.
Mechanical key
General notes If the vehicl ec an no longer be locked or
unlocke dw it ht he SmartKey or with KEYLESS-
GO ,u se the mechanical key.
If yo uu se the mechanical key to unlock and
open the driver's door or the trunk lid, the anti-
thef ta la rm system will be triggered .S witch off
the alarm ( Y
page 61).
Removing the mechanical key
X
Push release catch C in the direction of the
arrow and at the same time remove mechan-
ica lk ey D from the SmartKey.
For further informatio na bout :R
unlocking the driver's door ( Y
page 70)R
unlocking the trunk ( Y
page 71)R
locking the vehicl e( Y
page 70)
Insertin gt he mechanical keyX
Push mechanical key D completel yi nto the
SmartKey unti lite ngages and release
catch C is back in its basi cp osition. SmartKey battery
Important safety notes
G WARNING
Batterie sc ontain toxi ca nd corrosive substan-
ces. If batteries are swallowed, it can resul ti n
severe health problems .T here is ar is koff atal
injury.
Kee pb at teries ou toft he reach of children. If
ab at tery is swallowed, see km edica la ttention
immediately.
H Environmental note
Batterie sc ontain dangerous
substances. It is against the
la wtod is pose of them with
the househol dr ubbish .T hey
must be collected separately
and recycle dtop rotect the
environment.
Dispose of batteries in an
environmentally friendly
manner. Take discharged
batteries to aq uali fied spe-
cialist workshop or as pecial
collectio np oi nt for used bat-
teries.
The SmartKey batteries contain perchlorate
material ,w hi ch ma yr equire specia lh an dling
and regard for the environment. National guide-
lines must be observed during disposal. In Cal-
ifornia ,s ee www.dtsc.ca.gov/
HazardousWaste/Perchlorate/index.cfm .
Mercedes-Benz recommends tha ty ou have the
batteries replaced at aq uali fied specialist work-
shop. SmartKey 65
Opening and closing Z

Checking th eb atteryX
Press the 7 or 6 button.
The battery is working properl yifb attery
check lamp C light supb riefly.
The battery is discharged if battery check
lamp C does no tl ight up briefly.X
Change th eb attery ( Y
page 66).
If th eS ma rtKey battery is checked within the
signal reception range of th ev ehicle ,p ressing
the 7 or 6 button:R
locks or R
unlock st he vehicle
i You can get ab attery at any qualified spe-
cialist workshop.
Replacin gt he batteryYou require aCR2 02 53V cel lb attery.X
Tak et he mechanical ke yo ut of th eS ma rtKey
( Y
page 65).
X
Press mechanical key D int ot he SmartKey
opening in th ed irection of th ea rrow until bat-
tery compartmen tc over C opens. Do not
hold battery compartmen tc over C closed
while doin gs o.X
Remove battery compartmen tc over C . X
Repeatedly tap th eS ma rtKey against your
palm until battery