MERCEDES-BENZ CLS 2014 Workshop Manual

Note the following important information if it
is necessary to carryachild on the front-
passenger seat:
RYour vehicle is equipped with air bag
technology designed to deactivate the
front-passenger front air bag and the front-
passenger knee bag in yourvehicle when
the system senses the weight ofatypical
12-month-old child or less along with the
weight ofastandardappropriate child
restraint on the front-passenger seat.
RAchild inarear-facing child restraint on the
front-passenger seat will be seriously
injured or even killed if the front-passenger
front air bag inflates inacollision which
could occur under some circumstances,
even with the air bag technology installed
in your vehicle. The only means to eliminate
this risk completely is never to placeachild
inarear-facing child restraint in the front-
passenger seat. We therefore strongly
recommendthat you always placeachild
inarear-facing child restraint on the rear
seat.
RIf you installarear-facing child restraint on
the front-passenger seat, make sure the
indicator lamp is illuminated,
indicating that the front-passenger front air
bag and front-passenger knee bag are
deactivated. Should the
indicator lamp not illuminate or go out while
the restraint is installed, please check
installation. Periodicallycheck the
indicator lamp while driving to
make sure that theindicator
lamp is illuminated. If the
indicator lamp goes out or remains out, do
not transportachild on the front-passenger
seat until the system has been repaired.
Achild inarear-facing child restraint on the
front-passenger seat could be seriously
injured or even killed if the front-passenger
front air bag is deployed.
RIf you placeachild inaforward-facing child
restraint on the front-passenger seat:
-move the seat as far back as possible
-use the proper child restraint
recommended for the age, size and
weight of the child
-secure child restraint with the vehicle's
seat belt according to the child seat
manufacturer's instructions
RFor children larger than the typical 12-
month-old child, the front-passenger front
air bag and the front-passenger knee bag
may or may not be activated.
GWARNING
If the redSRS warning lamp in the
instrumentcluster and the
indicator lamp light up simultaneously,the
OCS is malfunctioning. The front passenger
front air bag and the front passenger knee bag
will be deactivated in this case. Have the
system checked by qualified technicians as
soon as possible. Contact an authorized
Mercedes-BenzCenter.
Only have the seat repaired or replaced at an
authorized Mercedes-BenzCenter.
In order to ensure proper operation of the air
bag system and OCS:
RSit with the seat belt properly fastened in a
position that is as upright as possible with
your back against the seat backrest.
RWhen seated,apassenger should not
position him/herself in suchaway as to
cause the passenger'sweight to be lifted
from the seat cushion as this may result in
the OCS being unable to correctly
approximatethe passenger'sweight
category.
RRead and observe all warnings in this
chapter.
Occupant safety49
Safety
Z

If the SmartKey is removed from the ignition
lock or is in position0,PASSENGER AIR BAG
OFF indicator lampdoes not light up.
The Occupant Classification System (OCS)
categorizesthe occupant on the front-
passengerseat usingaweight sensor.The
front-passenger front air bag is deactivated
automatically for certain weight categories.
The PASSENGER AIR BAG OFF indicator lamp
shows you the current status.
Occupant Classification System (OCS)
categories the occupant on the front-
passenger seat usingaweight sensor.
The front-passenger front air bag and the
front-passenger knee bag are deactivated
automatically for certain weight categories.
The PASSENGER AIR BAG OFF indicator lamp
shows you the current status.
If the PASSENGER AIR BAG OFF indicator
lamp lights up, the front-passenger front air
bag and the front-passenger knee bag are
disabled.
The system does not deactivate:
Rthe side impact air bag
Rthe pelvis air bag
Rthe window curtain air bag
Rthe Emergency Tensioning Devices
To be classified correctly, the front passenger
must sit:
Rwith the seat belt fastened correctly
Rinaposition that is as upright as possible
with their back against the seat backrest
Rwith their feet on the floor
The OCS weight sensor reading is affected if
the occupant's weight is transferred, e.g. by
leaning on the armrest.
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.
For safety reasons, Mercedes-Benz
recommends that you only use seat
accessories that have been approved by
Mercedes-Benz.
Both the driver and the front passenger
should always observe the PASSENGER AIR
BAG OFF indicator lamp as an indication of
whether or not the front passenger is
positioned correctly. Observe also the air bag
displaymessages that can be displayed in the
instrumentcluster (Ypage 244).
If the driver's air bag deploys, this does not
mean that the front-passenger front air bag
will also deploy.
The OCS may have detected that the seat:
Ris empty or occupied by the weight of a
typical child up to twelve months old,
seated inachild restraint system
Ris occupied byasmall individual, such as a
young teenager orasmall adult
Ris occupied byachild inachild restraint
system whose weight is greater than that
ofatypical twelve monthold child.
These are examples of when the OCS
deactivates the front-passenger front air bag
and front-passenger knee bag. Deactivation
takes place although the collision fulfills the
criteria for deploying the driver's air bag.
For further information,see "Air bag display
messages" (Ypage 244).
System self-test
GWARNING
If theindicator lamp does not
illuminate, the system is not functioning. You
must contactanauthorized Mercedes-Benz
50Occupant safety
Safety

Centerbefore seating any child on the front
passenger seat.
GWARNING
Objects between the seat surface and the
child restraint system could affect the
function of the OCS. This could result in the
front-passenger frontair bag not functioning
as intended during an accident. This poses an
increased risk of injury or even fatal injury.
Do not place any objects between the seat
surface and the child restraint system. Make
sure that the bottom and back of the child
restraint system make full contact with the
front-passenger seat cushion and backrest.
Always comply with the child restraint system
manufacturer's installation instructions.
The PASSENGER AIR BAG OFF indicator lamp
lights up:
Rif you turn the SmartKey in the ignition lock
to position1or2
Rif you press the KEYLESS-GO Start/Stop
button onceortwice on vehicles with
KEYLESS-GO
Rif an adult is seated properly on the front-
passenger seat and the OCS classifies the
occupant as an adult
The PASSENGER AIR BAG OFF indicator
lamp goes out again after approximately six
seconds.
If the seat is not occupied and the OCS
system detects that the front-passenger
seat is empty, the PASSENGER AIR BAG
OFF indicator lamp will continue to light up.
The PASSENGER AIR BAG OFF indicator
lamp will not go out.
For more information about the OCS, see
"Problems with the Occupant Classification
System"(Ypage 52).
Occupant safety51
Safety
Z

Problems with the Occupant Classification System
GWARNING
If theindicator lamp illuminates and remains illuminated when the weight ofatypical
adult or someone larger thanasmall individual has been detected on the passenger seat, do not
allow any occupant to use the passenger seat until the system has been repaired.
GWARNING
If theindicator lamp does not illuminate or remains out with the weight ofatypical
12-month-old child inastandard child restraint or less, or is unoccupied, on the front-passenger
seat, do not transportachild on the front-passenger seat until the system has been repaired.
ProblemPossiblecauses/consequencesandSolutions
The PASSENGER AIR
BAG OFF indicator
lights up and remains
on.
The person on the
front-passenger seat:
Rhas the weight of a
typical adult
Rhas been determined
by the system not to
beachild
The COS is malfunctioning.
XMake sure that the front passenger is sitting inacorrect,upright
position.
XHave the COS checked as soon as possible ataqualified
specialist workshop.
XObserve the additional displaymessages in the multifunction
display(Ypage 244).
52Occupant safety
Safety

ProblemPossible causes/consequences andSolutions
The PASSENGER AIR
BAG OFF indicator
lamp does not light up
and/or does not stay
on.
The front-passenger
seat is:
Runoccupied
Roccupied with the
weight ofachild up
to twelve months old
inachild restraint
system
The COS is malfunctioning.
XMake sure there is nothingbetween the seat cushion and the
child seat.
XMake sure that the backrest and base of the child restraint
system rest on the front-passenger seat. If necessary, adjust
the position of the front-passenger seat.
XWhen installing the child restraint system, make sure that the
seat belt is tight. Do not pull the seat belt tight with the front-
passenger seat adjustment.This could result in the seat belt
being pulledtoo tightly.
XCheck the installation of the child restraint system.
XMake sure that no objectsare applying additionalweight onto
the seat.
XIf the PASSENGER AIR BAG OFF indicator lamp remains off, have
the COS checked immediatelyataqualified specialist
workshop. Do not transportachild on the front-passenger seat
until the COS has been repaired.
XObservethe additional display messages in the multifunction
display (Ypage 244).
NECK-PRO head restraints/NECK-
PRO luxuryhead restraints
Importantsafetynotes
GWARNING
The function of the head restraint may be
impaired if you:
Rattach objects such as coat hangers to the
head restraints, for example
Ruse head restraint covers
If you do so, the head restraintscannot fulfill
their intended protective function in the event
of an accident. In addition, objects attached
to the head restraintscould endanger other
vehicle occupants. There is an increased risk
of injury.
Do not attach any objects to the head
restraintsand do not use head restraint
covers.
NECK-PRO head restraints/NECK-PRO luxury
head restraintsincrease protection of the
driver'sand front-passenger's head and
neck. In the event ofarear collision of a
certain severity, the NECK-PRO head
restraints/NECK-PRO luxury head restraints
on the driver'sand the front-passenger seats
are moved forwards and upwards. This
provides better head support.
If the NECK-PRO head restraints/NECK-PRO
luxury head restraintshave been triggered in
an accident, reset the NECK-PRO head
restraints/NECK-PRO luxury head restraints
on the driver'sand front-passenger seats
(Ypage 54). Otherwise, the additional
protection will not be available in the event of
another rear-end collision. NECK-PRO head
restraints/NECK-PRO luxury head restraints
that have been triggered are moved forwards
and can no longer be adjusted.
Mercedes-Benz recommends that you have
the NECK-PRO head restraints/NECK-PRO
luxury head restraintschecked ataqualified
specialist workshop afterarear-end collision.
Occupant safety53
Safety
Z

Resetting triggeredNECK-PROhead
restraints/NECK-PROluxuryhead
restraints
NECK-PROheadrestraints
NECK-PRO head restraints
XTilt thetopof theNECK-PRO head restraint
cushion forwards in thedirection of
arrow.
XPush theNECK-PRO head restraint cushion
down in thedirection of arrowas far as
it will go.
XWithyour handflat,firmly push theNECK-
PRO head restraint cushion backwards in
thedirection of arrow$until it engages.
XRepeat this procedure for thesecond
NECK-PRO head restraint.
NECK-PROluxuryheadrestraints
NECK-PRO luxuryhead restraints
XRemoveresettingtoolfrom thevehicle
documentwallet.
XSlideresettingtoolintoguide
between theNECK-PRO luxuryhead
restraint and therear cover of thehead
restraint.
XPush resettingtooldownwards until you
hear thehead restraint deployment
mechanism engage.
XPull out resettingtool.
XWithyour handflat,firmly push theNECK-
PRO luxuryhead restraint cushion
backwards in thedirection of arrow$until
it engages.
XRepeat this procedure for thesecond
NECK-PRO luxuryhead restraint.
XPut resettingtoolback intothevehicle
documentwallet.
iIf you have difficultyresettingtheNECK-
PRO luxuryhead restraints, have this work
carried out ataqualified specialist
workshop.
PRE-SAFE®(anticipatoryoccupant
protection system)
!Makesure that there are no objectsinthe
footwell or behindtheseatswhen resetting
the seats. There isarisk that the seats
and/or the objectscould be damaged.
PRE-SAFE®takes preemptive measures to
protect occupants in certain hazardous
situations. Despite your vehicle being
equipped with the PRE-SAFE®system, the
possibility of personal injuries occurring as a
result of an accident cannot be eliminated.
Always adapt your driving style to suit the
prevailing road and weather conditionsand
maintainasafe distance from the vehicle in
front.Drive carefully.
PRE-SAFE®intervenes:
Rif BAS intervenes, e.g. in emergency
braking situations.
Rif BAS PLUS intervenes powerfully—on
vehicles with DISTRONIC PLUS.
54Occupant safety
Safety

Rif, on vehicles with DISTRONIC PLUS,the
radar sensor system detectsanimminent
dangerofcollision in certain situations.
Rin critical driving situations, e.g. when
physical limits are exceeded and the
vehicle understeers or oversteers severely.
PRE-SAFE®takes the following measures
depending on the hazardous situation
detected:
Rthe front seat belts are pre-tensioned.
Rthe front-passenger seat is adjusted if it is
in an unfavorable position.
Rvehicles withamulticontour seat or active
multicontour seat: the air pressure in the
side bolsters of the seat cushion and
backrest is increased.
Rif the vehicle skids, the sliding sunroof and
the side windows are closed so that only a
small gap remains.
If the hazardous situation passes without
resulting in an accident,PRE-SAFE®slackens
the belt pre-tensioning. The air pressure in
the side bolsters on the multicontour seat/
active multicontour seat is reduced again. All
settings made by PRE-SAFE®can then be
reversed.
If the seat belts are not released:
XWhen the vehicle is stationary, move the
backrest or seat back slightly.
The seat belt pre-tensioningisreduced and
the lockingmechanism is released.
Information about seat belt adjustment, a
conveniencefunction integrated into PRE-
SAFE®,can be found in the "Seat belt
adjustment" section (Ypage 57).
Seat belts
Important safety notes
GWARNING
The seat belt does not offer the intended level
of protection if the backrest is not in the
upright position. When braking or in the event
of an accident,you 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 make sure that the seat
is in the upright position.
GWARNING
Seat belts cannot protect as intended, if:
Rthey are damaged, extremely dirty,
bleached or dyed
Rthe seat belt buckle is damaged or
extremely dirty
Rthe Emergency TensioningDevices or the
belt anchorage has been modified.
Damage caused to seat belts in an accident
may not be visible, e.g. by splinters of glass.
Modified or damaged seat belts can tear or
fail, for example in the event of an accident.
Modified Emergency TensioningDevices may
be deployed unintentionally or fail to be
deployed when required. There is an
increased risk of injury, possibly even fatal.
Never modify seat belts, Emergency
TensioningDevices, seat belt anchorages and
inertia reels. Ensure that seat belts are not
damaged or worn and are clean.
Only use seat belts that have been approved
for your vehicle by Mercedes-Benz.
The use of seat belts and infant and child
restraint systems is required by law in:
Rall 50 states
Rthe U.S. territories
Rthe District of Columbia
Rall Canadianprovinces
Even where this is not required by law,all
vehicleoccupants should correctly fasten
their seat belts before starting the journey.
iSee "Children in the vehicle"
(Ypage60) for further information on
infants and children traveling in the vehicle
as wellasonchild restraint systems.
Occupant safety55
Safety
Z

Correct use of theseat belts
GWARNING
USESEATBELTS PROPERLY
RSeat beltscan only work when used
properly. Never wear seat beltsinany other
way than as describedinthissection, as
that couldresult in serious injuries in the
event of an accident.
REachoccupantshould wear their seat belt
at all times, because seat belts help reduce
the likelihood of and potential severity of
injuries in accidents, including rollovers.
The integrated restraint system includes
SRS (driver front air bag, driver's side knee
bag, front-passenger front air bag, side
impact air bags, pelvis air bags, window
curtain air bags for the side windows),
EmergencyTensioning Devices, seat belt
force limiters, and front seat knee bolsters.
The system is designed to enhance the
protection offered to properly belted
occupants in certain frontal (front air bags,
driver's side knee bag and ETDs) and side
(side impact air bags, window curtain air
bags, and ETDs) impacts which exceed
preset deployment thresholds and in
certain rollovers (window curtain air bags
and ETDs).
RNever wear the shoulder belt under your
arm, across your neck or off your shoulder.
Inafrontal crash, your body would move
too far forward. That would increase the
chance of head and neck injuries. The seat
belt would also apply too much force to the
ribs or abdomen, which could severely
injure internal organs such as your liver or
spleen.
Adjust the seat belt so that the shoulder
section is located as close as possible to
the middle of the shoulder. It should not
touch the neck.Never pass the shoulder
portion of the seat belt under your arm. For
this purpose, you can adjust the height of
the seat belt outlet.
RPosition the lap belt as low as possible on
your hips and not across the abdomen. If
the lap belt is positioned across your
abdomen, it could cause serious injuries in
acrash.
RNever wear seat belts over rigid or
breakable objects in or on your clothing,
such as eyeglasses, pens, keys etc., as
these might cause injuries.
RMake sure the seat belt is alwaysfitted
snugly. Take special care of this when
wearing loose clothing.
RNever useaseat belt for more than one
person atatime. Do not fastenaseat belt
aroundaperson and another person or
other objects at the same time.
RSeat belts should not be worn twisted. In a
crash, you would not have the full width of
the seat belt to distributeimpact forces.
The twisted seat belt against yourbody
could cause injuries.
RPregnant women should also alwaysuse a
lap-shoulder belt. The lap belt portion
should be positioned as low as possible on
the hips to avoid any possible pressure on
the abdomen.
RPlace the seat backrest inaposition that is
as upright as possible.
RCheck your seat belt during travel to make
sure it is properly positioned.
RNever place your feet on the instrument
panel, dashboard, or on the seat. Always
keep both feet on the floor in front of the
seat.
RWhen usingaseat belt to secure infant
restraints, toddler restraints, or children in
booster seats, alwaysfollow the child seat
manufacturer'sinstructions.
Fastening seat belts
GWARNING
According to accident statistics, children are
safer when properly restrained on the rear
seats than on the front-passenger seat. Thus,
we strongly recommendthat children be
56Occupant safety
Safety

placed in the rear seat whenever possible.
Regardless of seatingposition,children 12
years old and under must be seated and
properly secured in an appropriately sized
child restraint system or booster seat
recommended for the size and weight of the
child. For additional information,see the
"Children in the vehicle" section.
Achild's risk of serious or fatal injuries is
significantly increased if the child restraints
are not properly secured in the vehicle and/
or the child is not properly secured in the child
restraint.
XAdjust the seat and move the backrest to
an almost vertical position (Ypage 98).
XPull the seat belt smoothly through belt
sash guide.
XWithout twisting it, guide the shoulder
section of the seat belt across the middle
of your shoulder and the lap section across
your pelvis.
XEngage belt tonguein buckle$.
Seat-belt adjustment:ifnecessary, the
driver's and front-passenger seat belts
automatically adjust to the upper body
(Ypage 57).
XIf necessary, adjust the seat belt to the
appropriate height (Ypage 58).
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 withaspecial seat belt retractor to
securely fasten child restraint systems in the
vehicle. Further information can be found
under "Special seat belt retractor"
(Ypage 63).
For more information about releasing the seat
belt with release button!,see "Releasing
seat belts" (Ypage 58).
Seat belt adjustment
The seat-belt adjustment function adjusts the
driver's and front-passenger seat belt to the
upper body of the occupants.
The belt strap is tightened slightly when:
Ryou engage the belt tongue in the belt
buckle and you then turn the SmartKey to
position2in the ignition lock.
Rthe SmartKey is in position2in the ignition
lock and you then engage the belt tongue
in the buckle.
The seat-belt adjustment will apply a
retraction forceifany slack is detected
between the occupant and the seat belt. Do
not hold on to the seat belt tightly while it is
adjusting. You can switch the seat-belt
adjustment on and off in the on-board
computer (Ypage 233).
The seat-belt adjustment is an integral part of
the PRE-SAFE®convenience function.More
information about PRE-SAFE®can be found
under "PRE-SAFE®(preventativeoccupant
protection)" (Ypage 54).
Occupant safety57
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Z

Beltheight adjustment
Youcan adjustthe seat belt height on the
front seats. Adjust the belt toaheight that
allowsthe upper part of the seat belt to be
routed across the center of your shoulder.
XTo raise:slide the belt sash guide upwards.
The belt sash guide engages in various
positions.
XTo lower:press and hold belt sash guide
release.
XSlide the belt sash guide downwards.
XRelease belt sash guide releaseand
make sure that the belt sash guide has
engaged.
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. Visitaqualified specialist
workshop.
XPress release button!on belt buckle$.
XGuidebelt tongueto belt sash
guide.
Belt warning for the driver and front
passenger
Regardless of whether the driver's and front-
passenger seat belts have already been
fastened, theseat belt warning lamp
lights up for six seconds each time the engine
is started. It then goes out if the driver and
the front passenger have already fastened
their seat belts.
If the driver's seat belt is not fastened when
the engine is started, an additional warning
tone will sound. This warning tone stops after
amaximum of six seconds or once the
driver's seat belt is fastened.
If after six seconds, the driver or front
passenger have not fastened their seat belts
and the doors are closed:
Rtheseat belt warning lamp remains lit
as long as the driver's or front-passenger's
seat belt is not fastened
and
Rifavehicle speed of 15 mph (25 km/h) is
exceeded, theseat belt warning lamp
begins to flash.Awarning tone also sounds
withincreasing intensityforamaximum of
58Occupant safety
Safety