MERCEDES-BENZ S-CLASS CABRIOLET 2017 Service Manual

If
th es eat belt extende rdoesn otretract au to‐
matically ,itcan be retracted manually .Todoso,
press thes eat belt extende rbackasf ar as it will
go be fore startin gthe vehicle. Pressing thes eat
belt extende rbacki ntop lace requ ires forc e. &
WARNING Risk of inju ryor deat hwhen
additional restra int sy stems ar enotused
fo rp ersons wit hasmaller build
Pe rsons under 1.50 mt all canno twear the
seat belt cor rectly wi thout asuitable addi‐
tional restra int sy stem.
If th es eat belt is no twornc orrectly ,itc an‐
no tp erform its intended pr otectiv efunction.
In addition, an incor rectly fastened seat belt
can also cause injuries, fore xamp le, in the
ev ent of an acciden torwhen braking or
ch anging direction sudden ly.#
Alw ayss ecur epersons under 1.50 m
ta ll in asuitable restra int sy stem. &
WARNING Risk of inju ryor deat hdueto
damaged or modified seat belts
Seat belts cann otprov ide pr otection in the
fo llowing situations:
R Ifth es eat belts ar edamaged, modified,
ex treme lydirty ,bleached or dyed
R Ifth es eat belt buckle is damaged or
ex treme lydirty
R Ifth es eat belt tensioners, sea tbelt
anchorages or sea tbeltr etra ctor shave
been modified
Seat belts ma ybedamaged in an accident,
although thed amag emaynotbev isible, e.g.
due tosplinter sofglass.
Modified or damaged seat belts ma ytear or
fa il, e.g. in an accident.
Modified seat belt tensioner scould acciden‐
ta llyt rigger or failto function as intended. #
Neverm odify thes eat belts, seat belt
te nsioners, sea tbelta nchorages or seat
belt retractors. #
Makesur ethat thes eat belts are
undamaged, no tworna nd clean. #
Alw aysh ave thes eat belts checked
immediatel yafter an accident at a
qu alified specialis tworks hop. Mercedes-Benz
recommends that youo nly use
seat belt swhichh aveb een appr ovedspecifically
fo ry our vehicle byMercedes-Benz. &
WARNING Risk of inju ryor deat hfrom
deplo yedp yrot echni cseatb eltt ension‐
ers
Pyr otechni cseatb eltt ensione rsthat ha ve
been deplo yeda reno longer operational and
ar eu nable toper form their intended pr otec‐
tiv ef unction. #
Therefore, ha vedeplo yedp yrot echnic
se at belt tensioner simmedia tely
re placed at aqualified specialis twork‐
shop. 38
Occupant saf ety

Mercedes-Benzr
ecommendsthat youh avet he
ve hicle towe dtoaq ualified specialis tworks hop
af te rana ccident.
* NO
TEDama gecaused bytrapping the
seat belt If an unused seat belt is no
tfully retracted ,it
ma ybecome trappe dinthe door or in the
seat mechanism. #
Alw ayse nsur ethat an unused seat belt
is full yretra cted. Ex
tending/r etra ctin gthe sea tbelt extender The seat belt
extende rfor thef ront seat helps
yo uf asteny our seat belt. When thed oor is
closed, thes eat belt extende rextends.
Yo uc an also extend thes eat belt extende rusing
th es eat belt extende rbutton. #
Switc hthe ignition on. #
Press seat belt extende rbutton 1.
The sea tbelte xtende rextends.
The seat-belt extende risr etra cted agai nif:
R thes eat belt tongu eise ngaged in thes eat
belt buckle
R thes eat belt tongu eisn otengaged in the
seat belt buckle within 60 seconds In
this case, press seat-belt extende rbutton
1 again. The sea tbelte xtende rextends
again.
R ther espectiv edoor is opened
R youf old thes eat backres tfor wa rds
R nobody is sittin ginthe front passenger seat
If yo up ress seat belt extende rbutton 1
af te rt his, thes eat-belt extende rwillnol on‐
ge re xtend.
The sea tbelte xtende rmusta lway sber etra cted
whil ethe vehicle is in motion. Fa
stening seat belts If
th es eat belt is pulled quickl yors harply,the
seat belt retractor lo cks. The seat belt stra pc an‐
no tbep ulled out an yfurther. Occupant saf
ety39

#
Alw ayse ngag eseat belt tongue 2ofthe
seat belt int oseat belt buckle 1ofthec or‐
re sponding seat.
Ve hicles with PRE-SAFE ®
:if th ef ront seat belt
is no tpulled tight across your body ,the seat belt
adjustment ma yautomaticall yapply acertain
tigh tening forc e. Do no thold thes eat belt tightly
while it is adjusting .You can activat eand deacti‐ va
te thes eat belt adjustmen tfunction using the
multimedia sy stem.
Ve hicles with automatic front passen ger
fron tairbag deacti vatio ns ystem:
* NO
TEDeployment of thes eat belt ten‐
sioner and side impact airba gwhent he
front passenger seat is unoccupied If
th es eat belt tongu eise ngaged in thes eat
belt buckle of theu noccupied front
passenger seat, thes eat belt tensioner and
th es ide impact airbag ma yalso deplo yinthe
ev ent of an acciden talong wit hother sys‐
te ms. #
Onlyone person should use eac hseat
belt at an yone time. Ve
hicles without automatic front passen ger
fron tairbag deacti vatio ns ystem: *
NO
TEDeployment of thes eat belt ten‐
sioner when thef ront passenger seat is
unoccupied If
th es eat belt tongu eise ngaged in thes eat
belt buckle of theu noccupied front
passenger seat, thes eat belt tensioner may
also depl oyinthee vent of an acciden talong
wit ho ther sy stems. #
Onlyone person should use eac hseat
belt at an yone time. Re
leasing aseat belt #
Press ther elease button in thes eat belt
buckle and guide thes eat belt bac kwitht he
seat belt tongue. 40
Occupant sa fety

Ac
tivatin gordeactivatin gseatb elta djust‐
men tviathe multimedi asystem Multimedia sy
stem:
, Vehicle .
î Vehicle settings .
Belt
adjustment #
Activate Oor deacti vate ª thef unction. Seat belt
warning function fort he driver and
fron tpassen ger The
ü seat belt warning lam pinthe instru‐
ment displa yisareminder that all vehicle occu‐
pants mus twear their seat belts cor rectly.
In addition, an acoustic warning tone ma ysound.
As soo nasthe driver and front passenger fasten
th eir seat belts, thes eat belt warning goes out. Fu
nction of ther ear seat belt status display The
rear seat belt status displa yisonlyavailable
fo rc ertain countries. The
rear seat belt status displa yinforms you
whic hrear seat belt is no tfas tened.
Yo uc an immediatel ydismiss ther ear seat belt
st atus displa yusingthe bac kbutton on thel eft-
hand side of thes teering wheel . Airbags
Overvie
wofairbags 1
Knee airbag
2 Driver's airbag
3 Front passenger front airbag
4 Head airbag
5 Side impact airbag
The ins tallation location of an airbag is identified
by theA IRB AG symbol. Occupant saf
ety41

When activated, an airbag can pr
ovide addi‐
tiona lprotection fort he respectiv evehicle
occupant. AIRB
AG Potentia lprotection for
…
Knee airbag Thigh ,knee and lo werleg
Driver's airbag,
front passenger
front airbag Head and
ribcage
Head airbag Head
Side impact air‐
bag Ribcage, also pelvis
for
front sea toccupants The front passenger front airbag can onl
ybe
depl oyed in an acciden tifthePASSENGER AIR
BA GO FFindicator lam pisoff.Ift he front
passenger seat is occupied, mak esure, bo th
befor eand during thej ourne y,that thes tatus of
th ef ront passenger front airbag is cor rect
(→ page 48). *
NO
TEImpo rtant points toremember if
th ef ront passenger seat is unoccupied In an accident,
thec omponents of the
re stra int sy stem ma ydeplo yunnecessarily
on thef ront passenger side if:
R Ther eareheavy objects on thef ront
passenger seat.
R The seat belt tongu eise ngaged in the
seat belt buckle of thef ront passenger
seat and thef ront passenger seat is
unoccupied. #
Stow object sinas uitable place. #
Onlyone person should use eac hseat
belt at an yone time. Pr
otection bythea irbags Depending on
thea cciden tsituation ,anairbag
ma ysupplement thep rotection of fere dbyac or‐
re ctly fastened seat belt. &
WARNING Risk of inju ryor deat hdueto
incor rect sea tposition
If yo ud eviat ef romt he cor rect sea tposition,
th ea irbag cann otper form its intended pro‐
te ctiv efunction and deployment ma yeven
cause fur ther injuries.
To avo id hazardous situations ,alway sm ake
sur ethat all vehicle occupants:
R Have their seat belt fastened cor rectly,
including pregnant women.
R Ares eated properly and keep as fara way
as possible from thea irbags.
R Obser vethef ollowing information. #
Alw aysm akes uret hat ther ea reno
objects between thea irbag and vehicle
occupant. To
avo idther isk sresulting from thed eployment
of an airbag, eac hvehicle occupant must
obser vethef ollowing information:
R Befor estartin gy our journe y,adjus tyour seat
cor rectly ;the driver's seat and front 42
Occupant saf ety

passenger seat should be mo
vedasf ar back
as possible.
When doing so, alw ayso bser vethei nforma‐
tion on thec orrect driver's sea tposition
(→ page 94).
R Onlyhold thes teering wheel bythes teering
wheel rim. This allows thea irbag tobe fully
deplo yed.
R Alw aysl ean agains tthe seat backres twhen
th ev ehicle is in motion. Do no tlean forw ards
or agains tthe door or side windo w.Youm ay
ot herwise be in thed eployment area of the
airbags.
R Alw aysk eep your feet on thef loor .Don ot
put your feet on thec ockpit, fore xamp le.
Yo ur feet ma yotherwise be in thed eploy‐
ment area of thea irbag.
R Ifch ildren ar etrave lling in thev ehicle,
obser vethea dditional no tes( → pag e52).
R Alw ayss towa nd secur eobject scorrectl y. Objects in
thev ehicle interior ma ypreve nt an
airbag from functioning cor rectl y.Eac hvehicle
occupant mus talway sm akes ureoft hefollow‐
ing:
R Ther eareno people, animals or objects
between thev ehicle occupants and an air‐
bag.
R Ther eareno objectsb etwe en thes eat, door
and door pillar (B-pillar).
R Ther eareno har dobjects, e.g. coat hangers,
hanging on theg rabh andles or coat hooks.
R Ther eareno accessor yparts, suc hascup
holders, attached tothev ehicle within the
deployment area of an airbag, e.g. on doors,
side windo wsor side panelling.
R Ther eareno heavy ,sharp-edged or fragile
object sinthe poc kets of your clo thing. Store
suc hobjectsinas uitable place. Re
duce dairbag pr otection &
WARNING Risk of inju ryfrom modi fica‐
tions tothea irbag co ver
If yo um odify an airbag co verora ffix objects
suc hass tickers to it,thea irbag can no lon‐
ge rfunction cor rectl y. #
Neverm odify an airbag co vera nd do
no ta ffix objectstoi t. The ins
tallation location of an airbag is identified
by theA IRB AG symbol (→ page41). &
WARNING Risk of inju ryor deat hdueto
th eu se of unsuitable seat co vers
Uns uitable seat co vers can obstruct or pre‐
ve nt thed eployment of thea irbags integra‐
te di ntot he seats.
Consequentl y,thea irbags cann otprotect
ve hicle occupants as they ared esigned to
do. In addition, theo peration of thea uto‐
matic front passenger airbag shutof fcould
be restricted. Occupant saf
ety43

#
Yous hould on lyuse seat co vers that
ha ve been appr oved fort he cor respond‐
ing seats byMercedes-Benz. &
WARNING Risk of inju rydue tomalfunc‐
tions of thes ensor sinthe door panelling
Sensor stocontrol thea irbags ar elocated in
th ed oors. Modification sorworkn otper‐
fo rm ed cor rectl ytot he door sordoor panel‐
ling, as well as damaged doors, can lead to
th ef unction of thes ensor sbeing impaired.
The airbags might therefor enotfunction
proper lyan ym ore.
Consequent ly,t he airbags canno tprotect
ve hicle occupants as they ared esigned to
do. #
Neverm odify thed oor sorp arts of the
doors. #
Alw aysh ave workon thed oor sord oor
panelling car ried out at aqualified spe‐
cialis tworks hop. &
WARNING Risk of inju rydue todeplo yed
airbag
Ad eplo yeda irbag no longer of fers anyp ro‐
te ction and canno tprovide thei ntended pro‐
te ctiv efunction in thee vent of an accident. #
Have thev ehicle towe dtoaq ualified
specialis tworks hop in order tohave the
deplo yeda irbag replaced. Ha
ve deplo yeda irbags replaced immediately. St
atus of thef ront passenger airbags Fu
nction of thea utomatic front passenger
front airbag deactivation sy stem
The automatic front passen gerfront airbag deac‐
tivation sy stem is able todetect whe ther the
front passenger sea tisoccupied byap erson or
ac hild restra int sy stem. The front passenger air‐
bag is enabled or disabled accordingly. When
fitting achild restra int sy stem tothef ront
passenger seat, alw aysm akes ureoft hefollow‐
ing:
R Ensur ethat thec hild restra int sy stem is posi‐
tioned cor rectl y(→pag e59).
R Alw ayso bser vethec hild restra int sy stem
manufacturer's ins tallation instructions.
R Neverp lace objects, e.g. cushions, under or
behind thec hild restra int sy stem.
R Fullyr etra ct thes eat cushion lengt hadjust‐
ment.
R The entir ebase of thec hild restra int sy stem
mus talway sr estont he sitting sur face of the
front passenger seat.
R The backres toftheforw ard-facin gchild
re stra int sy stem must, as farasp ossible, be
re sting on thes eat backres tofthe front
passenger seat.
R The child restra int sy stem mus tnot to ucht he
ro of or be put under stra in by theh ead
re stra ints. Adjus tthe seat backres tinclina‐
tion and theh ead restra int setting accord‐
ing ly. 44
Occupant saf ety

&
WARNING Risk of inju ryor deat hdueto
object sbetwe en thes itting sur face and
th ec hild restra int sy stem
Objects between thes itting sur face and the
ch ild restra int sy stem could af fect thef unc‐
tion of thea utomatic front passenger airbag
shutoff.
This could result in thef ront passenger air‐
bag no tfunctioning as intended during an
accident. #
Do no tplace an yobjects between the
sitting sur face and thec hild restra int
sy stem. #
The entir ebase of thec hild restra int
sy stem mus talway sr estont he sitting
sur face of thef ront passenger seat. #
The backres toftheforw ard-facin gchild
re stra int sy stem must, as farasp ossi‐
ble, be resting on thes eat backres tof
th ef ront passenger seat. #
Alw aysc ompl ywitht he child restra int
sy stem manufacturer's ins tallation
instructions. Ap
erson on thef ront passenger seat must
obser vethef ollowing information:
R Fasten seat belts cor rectl y.
R Sit in an almos tupright seat position wi th
th eir bac kagains tthe seat backrest.
R Sit wit htheir feet resting on thef loor ,ifp os‐
sible.
Otherwise, thef ront passenger airbag ma ybe
disabled bymis take ,for example in thef ollowing
situations:
R The front passenger transfer stheir weight by
supporting themselves on avehicle armrest.
R The front passenger sits in suc hawaythat
th eir weight is raised from thes itting sur‐
fa ce. &
WARNING Risk of inju ryor deat hdueto
deactivated front passenger airbag
If th eP ASSENGER AIRB AGOFF indicator
lam pisl it,thef ront passenger airbag is disa‐
bled. It will no tbedeployedint heeve nt of
an accident and canno tperform its intended
pr otectiv efunction. Ap
erson in thef ront passenger seat could
th en, fore xamp le, com eintoc ontact wi th
th ev ehicle interior ,especially if thep erson is
sitting tooc lose tothec ockpit.
If th ef ront passenger seat is occupied,
alw ayse nsur ethat:
R The classification of thep erson in the
front passenger sea tiscorrect and the
front passenger airbag is enabled or disa‐
ble dina ccordance wit hthe person in the
front passenger seat.
R The front passenger sea thas been mo ved
as farb ackasp ossible.
R The person is seated cor rectl y. #
Ensu re,b othb efor eand during thej our‐
ne y,that thes tatus of thef ront
passenger airbag is cor rect. Occupant saf
ety45

Fu
nction of theP ASSE NGER AIR BAGi ndica‐
to rlamps Sy
stem self- test
When thei gnition is switched on, asystems elf-
te st is per form ed during whic hthe two
PA SSENGER AIR BAGONa nd OFFindicator
lamps light up simultaneousl y.The
status of thef ront passenger airbag is dis‐
pla yeda fter thes ystem self-tes t:
R PASSENGER AIR BAGONl ightsupf or
60 seconds, subsequently bo thindicator
lamps ar eoff(PASSENGER AI RBAG ON and
OFF): thef ront passenger airbag is able to
deplo yintheeve nt of an accident.
R PASSENGER AIR BAGO FFlight supc ontinu‐
ously: thef ront passenger airbag is disabled.
It will then no tbed eployedint heeve nt of an
accident.
If th eP ASSENGER AIR BAGONi ndicator lam pis
off, on lytheP ASSENGER AIR BAGO FFindicator
lam pshows th estatus of thef ront passenger
airbag. The PASSENGER AIR BAGO FFindicator
lam pm aybe lit continuousl yorbeoff.
If th eP ASSENGER AIR BAGO FFindicator lamp
and the6 restra int sy stem warning lamp
light up simultaneousl y,thef ront passenger seat
ma ynotbe used. Also in this case, do no tins tall
ac hild restra int sy stem on thef ront passenger
seat. Ha vethea utomatic front passenger airbag
shutof fchec keda nd repaired immediately at a
qu alified specialis tworks hop. St
atus display
If th ef ront passenger seat is occupied, ensure,
bo th befor eand during thej ourne y,that thes ta‐
tus of thef ront passenger airbag is cor rect for
th ep reva ilin gs ituation.
Af teri nstalling arear ward-facing child
re stra int sy stem on thef ront passenger
seat: PASSENGER AIR BAGO FFmus tbel it con‐
tinuousl y. &
WARNING Risk of inju ryor deat hfrom
using arear ward-facing child restra int
sy stem when thef ront passenger airbag
is enabled
If yo us ecur eac hild in arear ward-facing
ch ild restra int sy stem on thef ront passenger
seat and theP ASSENGER AIR BAGO FFindi‐
cator lam pisoff,t he front passenger airbag
can deplo yintheeve nt of an accident.
The child could be stru ck bythea irbag.
Alw ayse nsur ethat thef ront passenger air‐
bag is disabled. The PASSENGER AIR BAG
OFF indicator lam pmustbel it. 46
Occupant saf ety

NEVER use
arear wardfacing child restra int
on aseat pr otected byan ACTIVE FRONT
AIRB AGin front of it ;DEATH or SERIOUS
INJUR YtotheCHILD can occur. When ins
talling achild restra int sy stem on the
front passenger seat, obse rvet he vehicle-spe‐
cific information in this Owner's Manual.
Dependin gonthechild restra int sy stem and the
st atur eoft hechild, theP ASSENGER AIR BAG
OFF indicator lam pmaybe off. In this case, do
no tins tallth er ear ward-facing child restra int
sy stem on thef ront passenger seat.
Ins tead, ins tallth er ear ward-facing child
re stra int sy stem on asuitable rear seat.
Af teri nstalling aforwa rd-facin gchild
re stra int sy stem on thef ront passenger
seat: depending on thec hild restra int sy stem
and thes tatur eoft hechild, PASSENGER AIR
BA GO FFma ybel it continuousl yorbeoff.
Alw ayso bser vethef ollowing information. &
WARNING Risk of inju ryor deat hdueto
incor rect positioning of thef orwa rd-
fa cing child restra int sy stem
If yo us ecur eac hild in aforwa rd-facin gchild
re stra int sy stem on thef ront passenger seat
and youp ositio nthe front passenger seat too
clos etot he cockpit, in thee vent of an acci‐
dent, thec hild could:
R Come int ocontact wi th thevehicle inte‐
ri or if theP ASSENGER AIR BAGO FFindi‐
cator lam pislit,f or example.
R Bestru ck bythea irbag if theP ASSENGER
AIR BAGO FFindicator lam pisoff. #
Alw aysm ove thef ront passenger seat
as farb ackasp ossible and fully retract
th es eat cushion lengt hadjustment.
Alw aysm akes uret hat thes houlder belt
st ra pisc orrectly routed from thes eat
belt outle tonthevehicle tothes houl‐
der belt guide on thec hild restra int sys‐
te m. The shoulder belt stra pm ustbe
ro uted forw ards and down wardsf rom
th es eat belt outlet. If necessar y,adjust th
es eat belt outle tand thef ront
passenger seat accordingly. #
Alw ayso bser vethec hild restra int sys‐
te mm anufacturer's ins tallation instruc‐
tions. When ins
talling achild restra int sy stem on the
front passenger seat, obse rvet he vehicle-spe‐
cific information in this Owner's Manual.
If ap erson is sitting in thef ront passenger
seat: PASSENGER AIR BAGO FFma ybel it con‐
tinuousl yorbeo ff,d ependin gonthe person's
st ature.
Ap erson on thef ront passenger seat must
alw ayso bser vethef ollowing information:
R Ifth ef ront passenger seat is occupied with
an adult or aperson wit hastatur ec orre‐
sponding tothat of an adult ,the PASSENGER
AIR BAGO FFindicator lam pmustbeo ff.T his
indicates that thef ront passenger airbag is
enabled.
If th eP ASSENGER AIR BAGO FFindicator
lam pisl it continuousl y,an adult or person
wit hab uild cor responding tothat of an adult Occupan
tsafety 47