2017 MERCEDES-BENZ S-Class COUPE ECU

system manufacturer's installation and oper-
ating instructions
Rbe sure to observe the instructions and safety
notes on the "Occupant classification system(OCS)" (
Ypage 49)
GWARNING
The seat belts may not perform their intended protective function if:
Rthey are damaged, modified, extremely
dirty, bleached or dyed
Rthe seat belt buckle is damaged or
extremely dirty
Rthe Emergency Tensioning Devices, belt
anchorages or inertia reels have 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
could accidentally trigger or fail to deploy
when necessary. This poses an increased risk
of injury or even fatal injury.
Never modify the seat belts, Emergency Ten-
sioning Devices, belt anchorages 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
immediately at a qualified specialist work-
shop.
Only use seat belts that have been approved for
your vehicle by Mercedes-Benz.
Proper use of the seat belts
Observe the safety notes on the seat belt
(Ypage 43).
All vehicle occupants must be wearing the seat
belt correctly before beginning the journey. Also
make sure that all vehicle occupants are always
wearing the seat belt correctly while the vehicle
is in motion.
When fastening the seat belt, always make sure
that:
Rthe seat belt tongue is only inserted to the belt
buckle belonging to that seat.
Rthe seat belt is tight across your body. Avoid wearing bulky clothing, e.g. a winter
coat.
Rthe seat belt is not twisted.
Only then can the forces which occur be dis-
tributed over the area of the belt.
Rthe shoulder section of the belt is always
routed across the center of your shoulder.
The shoulder section of the belt must not
come into contact with your neck or be routed
under your arm.
Rthe lap belt passes tightly and as low down as
possible across your lap.
The lap belt must always be routed across
your hip joints and not across your abdomen.
This applies particularly to pregnant women.
If necessary, push the lap belt down to your
hip joint and pull it tight using the shoulder
section of the belt.
Rthe seat belt is not routed across sharp, poin-
ted or fragile objects.
If you have such items located on or in your
clothing, e.g. pens, keys or eyeglasses, store
these in a suitable place.
Ronly one person is using a seat belt at a time.
Infants and children must never travel sitting
on the lap of a vehicle occupant. In the eventof an accident, they could be crushed
between the vehicle occupant and seat belt.
Robjects are never secured with a seat belt if
the seat belt is also being used by one of the
vehicle's occupants.
Also ensure that there are never objects
between a person and the seat, e.g. cushions.
Seat belts are only intended to secure and
restrain vehicle occupants. Always observe the
"Loading guidelines" for securing objects, lug-
gage or loads (
Ypage 253).
Fastening seat belts
Observe the safety notes on the seat belt
(Ypage 43) and the notes on correct use of seat
belts (Ypage 44).
GWARNING
If the seat-belt extender is extended during
the journey, the seat belt is not fitted properly
on the body. The seat belt can then no longer
perform its intended protective function. This
poses an increased risk of injury or even fatal
injury.
44Occupant safety
Safety

Always make sure that the seat-belt extenderis retracted during a journey.
If the seat-belt extender does not retract auto-
matically, you can return it manually. Press the
seat-belt extender back to the stop before start-
ing the vehicle to do so. Returning the seat-belt
extender requires force.
The seat-belt extender for the driver and front
passenger helps you fasten your seat belt. Seat-
belt extender 0087is extended when the respec-
tive door is closed.
You can also extend seat-belt extender 0087with
seat-belt extender button 0085.
XTurn the SmartKey to position 1or 2in the
ignition lock.
XPress seat-belt extender button 0085.
Seat-belt extender 0087extends.
Seat-belt extender 0087is retracted again if:
Rthe belt tongue is engaged in the seat belt
buckle
Rthe belt tongue is not engaged in the seat belt
buckle within 60 seconds
In this case, you can extend seat-belt
extender 0087again. Press seat-belt extender
button 0085again.
Rthe respective door is opened
Ryou release the seat backrest and fold it for-
wards
Rthe front-passenger seat remains unoccupied
If you then press seat-belt extender but-
ton 0085, seat-belt extender 0087will not extend.
Basic illustration
XAdjust the seat (Ypage 91).
The seat backrest must be in an almost ver-
tical position.
XPull the seat belt smoothly out of seat-belt
extender 0087and engage belt tongue 0044into
belt buckle 0043.
The seat belt on the driver’s seat and the
front-passenger seat may be tightened auto-
matically, see "Belt adjustment" (
Ypage 44).
XIf necessary, pull upwards on the shoulder
section of the seat belt to tighten the belt
across your body.
All seat belts except the driver's seat belt are
equipped with a special seat belt retractor to
securely fasten child restraint systems in the
vehicle. Further information can be found under
"Special seat belt retractor" (
Ypage 57).
Releasing seat belts
!Make sure that the seat belt is fully rolled up.
Otherwise, the seat belt or belt tongue will be
trapped in the door or in the seat mechanism.
This could damage the door, the door trim
panel and the seat belt. Damaged seat belts
can no longer fulfill their protective function
and must be replaced. Visit a qualified spe-
cialist workshop.
Occupant safety45
Safety
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the head restraint must support the head at
about eye level.
RMove the driver's and front-passenger seats
as far back as possible. The driver's seat posi-
tion must allow the vehicle to be driven safely.
ROnly hold the steering wheel on the outside.
This allows the air bag to be fully deployed.
RAlways lean against the backrest while driv-
ing. Do not lean forwards or lean against the
door or side window. You may otherwise be in
the deployment area of the air bags.
RAlways keep your feet in the footwell in front
of the seat. Do not put your feet on the dash-
board, for example. Your feet may otherwise
be in the deployment area of the air bag.
RFor this reason, always secure persons less
than 5 ft (1.50 m)tall in suitable restraint sys-
tems. Up to this height, the seat belt cannot
be worn correctly.
If a child is traveling in your vehicle, also
observe the following notes:
RAlways secure children under twelve years of age and less than 5 ft (1.50 m)tall in suitable
child restraint systems.
RChild restraint systems should be installed on
the rear seats.
ROnly secure a child in a rearward-facing child
restraint system on the front-passenger seat
when the front-passenger front air bag is
deactivated. If the PASSENGER AIR BAG OFF
indicator lamp is permanently lit, the front-
passenger front air bag is deactivated
(
Ypage 42).
RAlways observe the instructions and safety
notes on the "Occupant Classification System
(OCS)" (
Ypage 49) and on "Children in the
vehicle" (Ypage 57) in addition to the child
restraint system manufacturer's installation
and operating instructions.
Objects in the vehicle interior may prevent
an air bag from functioning correctly. Before
starting your journey and to avoid risks resulting from the speed of the air bag as it deploys, make
sure that:
Rthere are no people, animals or objects
between the vehicle occupants and an air
bag.
Do not place any objects on the dashboard,
e.g. above the front-passenger front air bag.
Rthere are no objects between the seat, door
and B-pillar.
Rno hard objects, e.g. coat hangers, hang on
the grab handles or coat hooks.
Rno accessories, such as cup holders, are
attached to the vehicle within the depl oyment
area of an air bag, e.g. to doors, side windows,
rear side trim or side walls.
Rno heavy, sharp-edged or fragile objects are in
the pockets of your clothing. Store such
objects in a suitable place.
GWARNING
If you modify the air bag cover or affix objects
such as stickers to it, the air bag can no longer
function correctly. There is an increased risk
of injury.
Never modify an air bag cover or affix objects
to it.
GWARNING
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.
Always have work on the doors or door pan-
eling carried out at a qualified specialist 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. In the
event of an accident, the restraint systems on
the front-passenger side may be triggered
and have to be replaced.
Occupant safety47
Safety
Z

0043PASSENGER AIR BAG ON indicator lamp
0044PASSENGER AIR BAG OFF indicator lamp
The indicator lamps inform you whether the
front-passenger front air bag is deactivated or
enabled.
XPress the Start/Stop button once or twice, or
turn the SmartKey to position 1or 2in the
ignition lock.
The system carries out self-diagnostics.
The PASSENGER AIR BAG OFF and PASSENGER
AIR BAG ON indicator lamps must light up simul-
taneously for approximately six seconds.
The indicator lamps display the status of the
front-passenger front air bag.
RPASSENGER AIR BAG ON lights up for 60 sec-
onds, subsequently both indicator lamps are
off (PASSENGER AIR BAG ON and OFF): the
front-passenger front air bag is able to deploy
in the event of an accident.
RPASSENGER 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 PASSENGER AIR BAG ON indicator lamp is off, only the PASSENGER AIR BAG OFF indicator
lamp shows the status of the front-passenger
front air bag. The PASSENGER AIR BAG OFF
indicator lamp may be lit continuously or be off.
If the status of the front-passenger front air bagchanges while the vehicle is in motion, an air bag
display message appears in the instrument clus- ter (
Ypage 213). When the front-passenger
seat is occupied, always pay attention to the
PASSENGER AIR BAG OFF indicator lamp. Be
aware of the status of the front-passenger front
air bag both before and during the journey.
GWARNING
If the PASSENGER AIR BAG OFF indicator
lamp is lit, the front-passenger front air bag is
disabled. It will not be deployed in the event of an accident and cannot perform its intended
protective function. A person in the front-
passenger seat could then, for example, come
into contact with the vehicle's interior, espe-
cially if the 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:
Rthe 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
Rthe front-passenger seat has been moved
back as far back as possible.
Rthe 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.
GWARNING
If you secure a child in a rearward-facing child
restraint system on the front-passenger seat
and the PASSENGER AIR BAG OFF indicator
lamp is off, the front-passenger front air bag
may deploy in the event of an accident. The
child could be struck by the air bag. This poses an increased risk of injury or even fatal injury.
Make sure that the front-passenger front air
bag has been disabled. The PASSENGER AIR
BAG OFF indicator lamp must be lit.
If the PASSENGER AIR BAG OFF indicator lamp
stays off, do not install a rearward-facing child
restraint system on the front-passenger seat.
You can find more information on OCS under
"Problems with the Occupant Classification Sys-
tem" (
Ypage 53).
50Occupant safety
Safety

GWARNING
If you secure a child in a forward-facing child
restraint system on the front-passenger seat
and you position the front-passenger seat too close to the dashboard, in the event of an
accident, the child could:
Rcome into contact with the vehicle's inte-
rior if the PASSENGER AIR BAG OFF indi-
cator lamp is lit, for example
Rbe struck by the air bag if the PASSENGER
AIR BAG OFF indicator lamp is off
This poses an increased risk of injury or even fatal injury.
Always move the front-passenger seat as far
back as possible and fully retract the seat
cushion length. Always make sure that the
shoulder belt strap is correctly routed from
the vehicle belt outlet to the shoulder belt
guide on the child restraint system. The shoul-
der belt strap must be routed forwards and
downwards from the vehicle belt outlet. If
necessary, adjust the vehicle belt outlet and
the front-passenger seat accordingly. Always
observe the child restraint system manufac-
turer's installation instructions.
If OCS determines that:
Rthe front-passenger seat is unoccupied, the
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.
Rthe front-passenger seat is occupied by a
child of up to twelve months old, in a standard
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-passenger front air bag is
deactivated.
But even in the case of a twelve-month-old
child, in a standard child restraint system, the
PASSENGER AIR BAG OFF indicator lamp can
go out after the system self-test. This indi-
cates that the front-passenger front air bag is
activated. The result of the classification is
dependent on, among other factors, the child
restraint system and the child's stature. It is
recommended tha
t you install the child
restraint system on a suitable rear seat.
Rthe front-passenger seat is occupied by a per-
son of smaller stature (e.g. a teenager or
small adult), the PASSENGER AIR BAG OFF
indicator lamp lights up and remains lit after
the system self-test depending on the result
of the classification or, alternatively, goes out.
-If the PASSENGER AIR BAG OFF indicator
lamp is off, move the front-passenger seat
as far back as possible. Alternatively, a per-
son of smaller stature can sit on a rear seat.
-If the PASSENGER AIR BAG OFF indicator
lamp is lit, a person of smaller stature
should not use the front-passenger seat.
Rthe front-passenger seat is occupied by an
adult or a person of adult stature, the
PASSENGER AIR BAG OFF indicator lamp
goes out after the system self-test. This indi-
cates 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"
(
Ypage 57).
When the occupant classification system (OCS)
is malfunctioning, the red 0075restraint system
warning lamp in the instrument cluster and the
PASSENGER AIR BAG OFF indicator lamp light
up simultaneously. The front-passenger front air
bag is deactivated in this case and does not
deploy during an accident. Have the Occupant
Classification System (OCS) checked and
repaired immediately at a qualified specialist
workshop. Mercedes-Benz recommends that
you use an authorized Mercedes-Benz Center
for this purpose.
If the front-passenger seat, the seat cover or the seat cushion are damaged, have the necessary
repair work carried out at a qualified specialist
workshop. Mercedes-Benz recommends that
you use an authorized Mercedes-Benz Center
for this purpose.
For safety reasons, Mercedes-Benz recom-
mends that you only use seat accessories that
have been approved by Mercedes-Benz.
If the driver's a

ir bag deploys, this does not
mean that the front-passenger front air bag will
also deploy. The Occupant Classification Sys-
tem (OCS) categorizes the occupant in the front-
passenger seat. Depending on that result, the
front-passenger front air bag is either enabled or
deactivated.
Occupant safety51
Safety
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Automa tic measures after an acci-
dent
Immediately after an accident, th efollowin g
measures are implemented, depending on th e
typ eand severity of th eimpact :
Rthehazard warning lamp sare activated
Rth eemergenc ylighting is activated
Rth evehicl edoor sare unlocke d
Rthefron tside windows are lowered
Rth eelectrically adjustable steering whee lis
raised
Rth eengin eis switched off and th efuel supply
is cut off
Rvehicles wit hmbrace :automatic emergenc y
call
Children in the vehicle
Import ant safety notes
Acciden tstatistics sho wthat children secured
in th erear seat sare safer than children secured
in th efront-passenger seat .Fo rthis reason ,
Mercedes-Benz strongly advises that you instal l
a child restrain tsystem on arear seat .Children
are generally bette rprotected there .
If achild younger than twelve years old and
under 5ft (1.50 m) in height is traveling in th e
vehicle:
Ralways secure th echild in achild restrain t
system suitable for Mercedes-Benz vehicles.
The child restrain tsystem mus tbe appropri-
ate to th eage, weigh tand siz eof th echild
Rbe sur eto observ eth einstruction sand safet y
note sin this section in addition to th echild
restrain tsystem manufacturer' sinstallation
instruction s
Rbe sureto observ eth einstruction sand safet y
note son th e"Occupant classification system
(OCS)" (
Ypage 49)
GWARNIN G
If you leav echildren unsupervised in th evehi-
cle ,they could set it in motion by, for example:
Rrelease th eparking brake.
Rshif tth eautomatic transmission out of th e
parking position P.
Rstart theengine.
In addition ,they may operate vehicl eequip -
men tand become trapped .There is aris kof
an acciden tand injury.
When leaving th evehicle, always tak eth e
SmartKey wit hyou and loc kth evehicle. Never
leav echildren unsupervised in th evehicle.
GWARNIN G
If persons, particularly children are subjecte d
to prolonged exposure to extreme heat or
cold, there is aris kof injury, possibl yeve n
fatal. Never leav echildren unattended in th e
vehicle.
GWARNIN G
If th echild restrain tsystem is subjecte dto
direc tsunlight, part smay get ver yhot .Chil-
dre nmay burn themselves on these parts,
particularly on th emetal part sof th echild
restrain tsystem. There is aris kof injury.
If you leav eth evehicle, taking th echild wit h
you, always ensur ethat th echild restrain t
system is no texposed to direc tsunlight. Pro -
tect it wit h ablanket, for example. If th echild
restrain tsystem has been exposed to direc t
sunlight, let it cool down before securin gth e
child in it .Never leav echildren unattended in
th evehicle.
Always ensur ethat all vehicl eoccupant shav e
their seat belt sfastene dcorrectl yand are sitting
properly. Particular attention mus tbe paid to
children .
Observ eth esafet ynote son th eseat belt
(
Ypage 43 )and the notes on correct use of seat
belts (Ypage 44).
A booster seat may be necessary to achieve
proper seat belt positioning for children over
41 lb s(18 kg) until they reach a height where a
three-point seat belt can be properly fastened
without a booster seat.
Special seat belt retractor
GWARNING
If the seat belt is released while driving, the
child restraint system will no longer be
Children in the vehicle57
Safety
Z

secured properly. The special seat belt retrac-tor is disabled and the inertia real draws in a
portion of the seat belt. The seat belt cannot
be immediately refastened. There is an
increased risk of injury, possibly even fatal.
Stop the vehicle immediately, paying atten-
tion to road and traffic conditions. Reactivate
the special seat belt retractor and secure the
child restraint system properly.
All seat belts except the driver's seat belt are
equipped with a special seat belt retractor.
When activated, the special seat belt retractor
ensures that the seat belt will not slacken once
the child restraint system has been secured.
Installing a child restraint system:
XAlways comply with the child restraint system
manufacturer's installation instructions.
XPull the front seat belt smoothly out of the
seat-belt extender and the rear seat belt out
of the belt outlet.
XEngage the seat belt tongue in the belt buckle.
Activating the special seat belt retractor:
XPull the seat belt out fully and let the inertia
reel retract it again.
While the seat belt is retracting, you should
hear a ratcheting sound. The special seat belt
retractor is activated.
XPush the child seat restraint system down so
that the seat belt is tight and does not loosen.
Removing a child restraint system and deacti-
vating the special seat belt retractor:
XAlways comply with the child restraint system
manufacturer's installation instructions.
XPress the release button of the belt buckle,
hold the belt tongue firmly and guide it back to
the seat-belt extender in the front and the belt
outlet in the rear.
The special seat belt retractor is deactivated.
Child restraint system
The use of seat belts and child restraint systems
is required by law in:
Rall 50 states
Rthe U.S. territories
Rthe District of Columbia
Rall Canadian provinces You can obtain further information about the
correct child restraint system from any author-
ized Mercedes-Benz Center.
GWARNING
If the child restraint system is installed incor-
rectly on a suitable seat, it cannot protect as
intended. The child cannot then be restrained
in the event of an accident, heavy braking or
sudden changes of direction. There is an
increased risk of injury, possibly even fatal.
Make sure that you observe the child restraint
system manufacturer's installation instruc-
tions and the notes on use. Please ensure,
that the base of the child restraint system is
always resting completely on the seat cush-
ion. Never place objects, e.g. cushions, under or behind the child restraint system. Only use
child restraint systems with the original cover
designed for them. Only replace damaged
covers with genuine covers.
GWARNING
If the child restraint system is installed incor-
rectly or is not secured, it can come loose in
the event of an accident, heavy braking or a
sudden change in direction. The child
restraint system could be thrown about, strik-
ing vehicle occupants. There is an increased
risk of injury, possibly even fatal.
Always install child restraint systems prop-
erly, even if they are not being used. Make
sure that you observe the child restraint sys-
tem manufacturer's installation instructions.
You will find further information on stowing
objects, luggage or loads under "Loading guide-
lines" (
Ypage 253).
GWARNING
Child restraint systems or their securing sys-
tems which have been damaged or subjected
to a load in an accident can no longer protect
as intended. The child cannot then be
restrained in the event of an accident, heavy
braking or sudden changes of direction. There is an increased risk of injury, possibly even
fatal.
58Children in the vehicle
Safety

Replacechild restrain tsystems whic hhav e
been damaged or subjecte dto aload in an
acciden tas soo nas possible. Hav eth esecur-
ing systems on th echild restrain tsystem
checke dat aqualified specialist workshop,
before you instal l achild restrain tsystem
again .
The securin gsystems of child restrain tsystems
are:
Rth eseat belt system
Rth eLATCH-type (ISOFIX) securin grings
Rth eTop Tether anchorages
If it is absolutely necessar yto carry achild on
th efront-passenger seat ,be sur eto observ eth e
information on th e"Occupant Classification
Syste m(OCS)" (
Ypage 49). There you will also
fin dinformation on deactivating th efront-
passenger fron tair bag.
All child restrain tsystems mus tmee tth efol -
lowin gstandards :
RU.S. Federal Motor Vehicl eSafet yStandards
21 3and 22 5
RCanadian Motor Vehicl eSafet yStandards
21 3and 210. 2
Confirmation that th echild restrain tsystem cor-
responds to th estandards can be foun don an
instruction label on th echild restrain tsystem.
This confirmation can also be foun din th einstal -
lation instruction sthat are included wit hth e
child restrain tsystem.
Observ eth ewarning labels in th evehicl einte-
rio rand on th ech ild re
strain
tsystem.
LATCH-type (ISOFIX) child seat secur-
ing system
GWARNIN G
LATCH-type (ISOFIX) child restrain tsystems
do no toffer sufficien tprotective effec tfor
children whos eweigh tis greate rthan 48 lbs
(22 kg )who are secured usin gth esafet ybelt
integrate din th echild restrain tsystem. In th e
event of an accident, achild might no tbe
restrained correctly. This poses an increased
ris kof injury or eve nfatal injury.
If th echild weigh smor ethan 48 lbs (22 kg),
only use LATCH-type (ISOFIX) child restrain t
systems withwhic hth echild is also secured
wit hth evehicl eseat belt .Als osecure th e
child restrain tsystem wit hth eTop Tether
belt ,if available.
Always comply wit hth emanufacturer' sinstal -
lation and operating instruction sfor th echild
restrain tsystem used .
Befor eevery trip, mak esur ethat th eLATCH -
typ e(ISOFIX) child restrain tsystem is engage d
correctl yin bot hLATCH-type (ISOFIX) securin g
rings
LATCH-type (ISOFIX) securin grings 0044on th e
rear seat sare covered by foldin gupholstere d
lining 0087withVelcro fastening.
XFold upholstere dlining 0087upwards.
XTurn support 0043by 90°.
Upholstere dlining 0087remain sfolded
upwards.
XInstall th eLATCH-type (ISOFIX) child restrain t
system on bot hLATCH-type (ISOFIX) securin g
rings 0044.
Afte ryou hav eremove dth eLATCH-type (ISO-
FIX) child restrain tsystem, you mus ttur nsup-
por t0043 on upholstere dlining 0087by 90 °again .
The nfol dupholstery lining 0087down .
ISOFIX is astandardize dsecurin gsystem for
specially designed child restrain tsystems on
th erear seats. LATCH-type (ISOFIX) securin g
rings 0044for two LATCH-type (ISOFIX) child
restrain tsystems are installed on th elef tand
right rear seats.
Non-LATCH-typ e(ISOFIX) child seat smay also
be used and can be installed usin gth evehicle's
seat belt system. Install th echild seat according
to th emanufacturer' sinstructions.
Children in the vehicle59
Safety
Z