2017 MERCEDES-BENZ SLC Owners Manual

The Emergency Tensionin gD evice tighten st he
seat belt in an accident ,p ulling the belt close
against the body. However it does not pull the
vehicle occupant back in the direction of the
backrest.
The Emergency Tensionin gD evice does not cor-
rect an incorrect seat position or the routing of
an incorrectly fastened seat belt.
When triggered, as eat belt force limiter helps to
reduce the force exerted by the seat belt on the
vehicle occupant.
The seat belt force limiters are synchronized
with the front air bags which absorb part of the
deceleration force. This can reduce the force
exerted on the vehicle occupant sd uring an acci-
dent.
! If the front-passenger seat is unoccupied,
do not insert the belt tongue into the buckle of
the front-passenger seat. This may otherwise
lead to the triggerin goft he Emergency Ten-
sioning Device in the event of an accident,
which will then need to be replaced.
Important safety notes The use of seat belts and child restraint systems
is required by law in: R
all 50 states R
the U.S. territories R
the District of Columbia R
all Canadian provinces
Even where this is not required by law, all vehicle
occupant ss hould correctly fasten their seat
belts before starting the journey.
G WARNING
If the seat belt is not worn correctly, it cannot
perform its intended protective function. An
incorrectly fastened seat belt can also cause
injuries, for example, in the event of an acci-
dent or when braking or changing direction
abruptly. This poses an increased risk of injury
or even fatal injury.
Always ensure that all vehicle occupant sh ave
their seat belts fastened correctly and are sit-
ting properly.
G WARNING
The seat belt does not offer the intended level
of protection if you have not moved the back- rest to an almost vertical position. When brak-
ing or in the event of an accident ,y ou could
slide underneath the seat belt and sustain
abdomen or neck injuries, for example. This
poses an increased risk of injury or even fatal
injury.
Adjust the seat properly before beginning
your journey. Always ensure that the backrest
is in an almost vertical position and that the
shoulder section of your seat belt is routed
across the center of your shoulder.
G WARNING
Persons less than 5ft( 1.50 m) tall cannot
wear the seat belt correctly without an addi-
tional and suitable restraint system. If the
seat belt is not worn correctly, it cannot per-
form its intended protective function. An
incorrectly fastened seat belt can also cause
injuries, for example, in the event of an acci-
dent or when braking or changing direction
abruptly. This poses an increased risk of injury
or even fatal injury.
For this reason, alway ss ecure persons under
5ft( 1.50 m) tall in suitable additional restraint
systems.
If ac hild younger than twelve years old and
under 5ft( 1.50 m) in height is traveling in the
vehicle: R
alway ss ecure the child in ac hild restraint
system suitable for this Mercedes-Benz vehi-
cle. The child restraint system must be appro-
priate to the age, weight and size of the child R
alway so bserve the instructions and safety
notes on "Children in the vehicle"
( Y
page 51) in addition to the child restraint
system manufacturer's installation and oper-
ating instructions R
be sure to observe the instructions and safety
notes on the "Occupant classification system
(OCS)" ( Y
page 44)Occupant safety 39
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

Basi ci llust rationX
Adjus tt he sea t( Y
page 82).
The sea tb ac krest mus tb einana lm ost ver-
tical position. X
Pull the sea tb el ts moothly ou tofb el tl oop

Air bags
Int rod uctionThe installation poin tofana ir bag can be rec -
ognized by th eA IR BA Gs ymbol.
An air bag complements th ec orrectly fastene d
seat belt .Itisnos ubstitut ef or th es eat belt .T he
air bag provides additional protection in appli-
cable acciden ts ituations.
Not all air bags are deployed in an accident. The
differen ta ir bag systems function independ-
entl yf ro mo ne another ( Y
page 48).
However, no system available today can com-
pletely eliminate injurie sa nd fatalities.
It is also no tp ossibl etor ule out ar is kofi njury
caused by an air bag due to th eh igh spee da t
whic ht he air bag mus tbed eployed.
Import ant safety notes
G WARNIN G
If you do no ts it in th ec orrect seat position ,
th ea ir bag canno tp rotect as intended and
could eve nc aus ea dditional injury when
deployed. This poses an increased ris ko f
injury or eve nf atal injury.
To avoi dh azardous situations, always mak e
sur et ha ta ll of th ev ehicle's occupants:R
hav ef astene dt he ir seat belt sc orrectly ,
includin gp regnant womenR
are sitting correctl ya nd maintai nt he great-
est possibl ed istanc etot he air bagsR
follow th ef ollowin gi nstruction s
Always mak es ur et ha tt he re are no objects
between th ea ir bag and th ev ehicle's occu-
pants .R
Adjus tt he seat sp roperly before beginning
your journey. Always mak es ur et ha tt he seat
is in an almost upright position .T he center of
th eh ead restrain tm us ts upport th eh ead at
about eye level. R
Mov et he driver's and front-passenger seat s
as far bac kasp ossible. The driver's seat posi-
tion mus ta llow th ev ehicl etobed riven safely.R
Only hold th es te ering whee lont he outside .
This allows th ea ir bag to be fully deployed.R
Always lean against th eb ackrest while driv-
ing .Don ot lean forward sorl ean against th e door or side window. You may otherwise be in
th ed eploymen ta rea of th ea ir bags .R
Always keep your fee tint he footwell in fron t
of th es eat .Don ot put your fee tont he dash -
board, for example. Your fee tm ay otherwise
be in th ed eployment area of th ea ir bag.R
Fo rt hi sr eason ,a lways secure person sl ess
than 5ft( 1.5 0m)t al lins ui tabl er estraint sys-
tems .Uptot hi sh eight ,t he seat belt cannot
be worn correctly.
If ac hild is traveling in your vehicle ,a lso
observe the followin gn ot es:R
Alway ss ec ur ec hildren under twelve year so f
ag ea nd less tha n5 ft (1.5 0m )t al lins ui table
child restraint systems. R
Onl ys ec ur eac hild in ar earward-facing child
restraint syste mont he front-passenge rs ea t
when the front-passenge rf ront ai rb ag is
deactivated .Ift he PASSENGER AIR BAG OFF
indicator lamp is permanentl yl it ,t he front-
passenge rf ront ai rb ag is deactivated
( Y
page 38). R
Alway so bser ve the instructions and safety
note sont he "Occupant Classification System
(OCS) "( Y
page 44) and on "Children in the
vehicle" ( Y
page 51 )i na ddit io ntot he child
restraint syste mm an ufacturer's installation
and operating instructions.
Objects in the vehicle interior may prevent
an air bag fro mf unctionin gc or rectly. Before
startin gy ou rj ourney and to avoi dr isks resulting
fro mt h e spee doft he ai rb ag as it deploys, make
sure that: R
there ar enop eople, animals or objects
between the vehicl eo ccupants and an air
bag. R
there ar enoo bj ects between the seat, door
and B-pillar. R
no accessories, such as cup holders, are
attache dtot he vehicl ew it hi nt he deployment
area of an ai rb ag ,e .g .tod oo rs or side win-
dows. R
no heavy, sharp-edged or fragile objects ar ei n
the pockets of your clothing. Store such
objects in as ui tabl ep la ce.
G WARNING
If yo um odify the ai rb ag cove rora ff ix objects
such as sticker stoi t, the ai rb ag can no longer
functio nc orrectly. There is an increase dr isk
of injury.42
Occupant safety
Safety

Never modify an air bag cover or affix objects
to it.
G WARNING
Sensors to control the air bags are located in
the doors. Modifications or work not per-
formed correctly to the doors or door panel-
ing, as well as damaged doors, can lead to the
function of the sensors being impaired. The air
bags might therefore not function properly
anymore. Consequently, the air bags cannot
protect vehicle occupants as they are
designed to do. There is an increased risk of
injury.
Never modify the doors or parts of the doors.
Alway sh ave work on the doors or door pan-
eling carried out at aq ualifie ds pecialist work-
shop.
Front air bags
! Do not place heavy objects on the front-
passenger seat. This could cause the system
to identify the seat as being occupied .Int he
event of an accident, the restraint systems on
the front-passenger side may be triggered
and have to be replaced.
Driver's air bag C deploys in front of the steer-
ing wheel .F ront-passenger front air bag D
deploys in front of and above the glove box.
When deployed, the front air bags offer addi-
tional head and thorax protection for the occu-
pants in the driver's and front-passenger seats.
The PASSENGER AIR BAG OFF and PASSENGER
AIR BAG ON indicator lamps inform you about
the status of the front-passenger air bag
( Y
page 38). The front-passenger front air bag wil lo nly
deplo yi f: R
the system, based on the OCS weight sensor
readings, detects that the front-passenger
seat is occupied ( Y
page 44). The
PASSENGER AIR BAG ON indicator lamp is lit
( Y
page 45) R
the restraint system control unit predicts a
high accident severity
Kne eb ags
Driver's knee bag C deploys under the steering
column and front-passenger knee bag D under
the glove box. The driver's and front-passenger
knee bags are triggered together with the front
air bags.
The driver's and front-passenger knee bags
offer additional thigh, knee and lowe rl eg pro-
tection.
Side impact air bags
G WARNING
Unsuitabl es eat covers can obstruct or pre-
vent deployment of the air bags integrated
into the seats. Consequently, the air bags
cannot protect vehicle occupants as they are
designed to do. In addition, the operatio no f
the occupant classification system (OCS)
could be adversel ya ffected. This poses an
increased risk of injury or even fatal injury.
You shoul do nly use seat covers that have
been approve df or the respective seat by
Mercedes-Benz.Occupant safety 43
Safety Z

Sid ei mpact ai rb ag s C deplo yn ext to the outer
bolster of the sea tb ac krest.
Whe nd eployed, the sid ei mpact ai rb ag offers
additiona lt hora xp rotection. However, it does
not protect the: R
head R
neck R
arms
In the event of as id ei mpact, the sid ei mpact air
ba gisd eploye dont he sid eonw hi ch the impact
occurs.
The sid ei mpact ai rb ag on the front-passenger
sid ed eploys under the following conditions:R
the OC Ss ys tem detects that the front-
passenger sea ti so ccupied orR
the bel tt ongu eise ngaged in the bel tb uc kle
of the front-passenger seat
If the bel tt ongu eise ngaged in the bel tb uc kle,
the sid ei mpact ai rb ag on the front-passenger
sid ed eploys if an appropriate accident situation
occurs. In this case, deployment is independent
of whethe rt he front-passenger sea ti so ccupied
or not.
Head bags
Hea db ag s C deplo yint he are aoft he sid ew in -
dow satt he front. Whe nd eployed, the hea db ag enhances the
level of protectio nf or the head. However, it does
not protect the: R
chest R
arms
In the event of as id ei mpact, the hea db ag is
deploye dont he sid eonw hi ch the impact
occurs.
If the system determine st hat they can offer
additiona lp rotectio ntot hat provided by the
sea tb elt, ah ea db ag may be deploye dino ther
accident situations ( Y
page 48).
The hea db ag on the front-passenger sid ed oes
not deplo yu nder the following conditions: R
OC Sh as detected that the front-passenger
sea ti su noccupied. R
the front-passenger sea tb el ti sn ot fastened.
If the bel tt ongu eise ngaged in the bel tb uc kle,
the hea db ag on the front-passenger side
deploys if an appropriate accident situation
occurs. In this case, deployment is independent
of whethe rt he front-passenger sea ti so ccupied
or not.
Occupant Classification System
(OCS)
Introduction The Occupant Classification System (OCS) cat-
egorize st he person in the front-passenger seat.
Depending on that result, the front-passenger
front ai rb ag and front-passenger knee ba ga re
either enabled or deactivated.
The system doe sn ot deactivate: R
the sid ei mpact ai rb agR
the front-passenger hea db agR
the Emergency Tensioning Devices
Prerequisites To be classifie dc orrectly ,t he front passenger
mus ts it: R
with the sea tb el tf astened correctlyR
in an almost upright position with thei rb ac k
against the sea tb ac krestR
with thei rf ee tr esting on the floor, if possible44
Occupan ts afety
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 secure ac hild in ar earward-facing child
restraint system on the front-passenge rs eat
and the PASSENGER AIR BAG ON indicator
lamp is lit up, the front-passenge rf ront air bag
may deploy in an accident. The child coul db e
struck by the air bag .T his pose sani ncreased
risk of injury or even fatal injury.
Make sure that the front-passenge rf ront air
bag has been disabled. The PASSENGER AIR
BAG OFF indicator lamp must be lit.
If the PASSENGER AIR BAG OFF indicator lamp
remains off and/or the PASSENGER AIR BAG
ON indicator lamp lights up, do not install ar ear-
ward-facing child restraint system on the front-
passenger seat. You can find more information
on OCS under "Problems with the Occupant
Classification System" ( Y
pag e4 8).
G WARNING
If you secure ac hild in af orward-facing child
restraint system on the front-passenge rs eat
and you position the front-passenge rs eat too
close to the dashboard, in the event of an
accident, the child could: R
come into contact with the vehicle's inte-
rior if the PASSENGER AIR BAG OFF indi-
cator lamp is lit, for example R
be struck by the air bag if the PASSENGER
AIR BAG ON is lit up
This poses an increased risk of injury or even
fatal injury.
Move the front-passenge rs eat as far back as
possible .A lways make sure that the shoulder
bel ts trap is correctly routed from the vehicle
bel tl oop to the shoulde rb el tg uide on the
child restraint system. The shoulde rb el ts trap
must be routed forwards and downwards
from the bel tl oop .A lways observe the child
restraint system manufacturer's installation
instructions.
If OCS determines that: R
the front-passenge rs eat is unoccupied ,t he
PASSENGER AIR BAG OFF indicator lamp
lights up after the system self-test and remains lit. This indicates that the front-
passenger front air bag is deactivated. R
the front-passenge rs eat is occupied by a
child of up to twelve months old, in as tandard
child restraint system, the PASSENGER AIR
BAG OFF indicator lamp lights up after the
system self-test and remains lit. This indi-
cates that the front-passenge rf ront air bag is
deactivated.
But even in the case of at welve-month-old
child ,inas tandard child restraint system, the
PASSENGER AIR BAG ON can light up perma-
nently after the system self-test. This indi-
cates that the front-passenge rf ront air bag is
activated. The result of the classification is
dependent on, among other factors, the child
restraint system and the child's stature. Make
sure that the conditions for ac orrect classi-
ficatio na re met. If the PASSENGER AIR BAG
OFF indicator lamp is still lit, do not install a
child restraint system on the front-passenger
seat. R
the front-passenge rs eat is occupied by ap er-
son of smaller stature (e.g. at eenage ro r
smal la dult), either the PASSENGER AIR BAG
ON or PASSENGER AIR BAG OFF indicator
lamp lights up and remains lit after the system
self-test depending on the result of the clas-
sification. -
If the PASSENGER AIR BAG ON indicator
lamp lights up, move the front-passenger
seat as far back as possible. -
If the PASSENGER AIR BAG OFF indicator
lamp is lit, ap erso nofs maller stature
should not use the front-passenge rs eat.R
the front-passenge rs eat is occupied by an
adult or ap erso nofa dult stature, the
PASSENGER AIR BAG ON indicator lamp
lights up after the system self-test and
remains lit. This indicates that the front-
passenger front air bag is activated.
If children are traveling in the vehicle, be sure to
observe the notes on "Children in the vehicle"
( Y
pag e5 1).
When OCS is malfunctioning, the red u
restraint system warning lamp in the instrument
cluster and the PASSENGER AIR BAG OFF indi-
cator lamp light up simultaneously .T he front-
passenger front air bag is deactivated in this
case and does not deploy during an accident.
Have the system checked by qualified techni-
cians as soon as possible .C onsult an authorized
Mercedes-Benz Center. The front-passenger46
Occupant safety
Safety