MERCEDES-BENZ S-CLASS CABRIOLET 2019 Service Manual

To
avo id hazardous situations, alw ays make
sure that all vehicle occupants:
R Have their seat belt fastened cor rectly,
including pregnant women.
R Are seated properly and that dis tance to
th e air bags is as large as possible.
R Obser vethefo llowing information. #
Alw ays make sure that there are no
objects between the air bag and the
ve hicle occupant. To
avo idtherisks resulting from the deployment
of an airbag, each vehicle occupant must
obser vethefo llowing information:
R Before starting your journe y,adjust your seat
co rrectly ;th e driver's seat and front-
passenger seat should be mo ved as far back
as possible.
When doing so, alw ays obser vethe informa‐
tion on the cor rect driver's seat position
(→ page 85). R
Only hold thesteering wheel bythesteering
wheel rim. This allow sth e airbag tobe fully
deplo yed.
R Alw ays lean against the seat backrest when
th eve hicle is in motion. Do not lean forw ards
or against the door or side windo w.You may
ot herwise be in the deployment area of the
airbags.
R Alw ayske ep your feet on thefloor. Do not
put your feet on the cockpit, forex ample.
Yo ur feet may otherwise be in the deploy‐
ment area of the airbag.
R Ifch ildren are tra veling in theve hicle,
obser vethe additional no tes (→ page 48).
R Alw aysstow and secure objects cor rectly.
Objects in theve hicle interior may pr event an
airbag from functioning cor rectly. Each vehicle
occupant must alw ays make sure of thefo llow‐
ing:
R There are no people, animals or objects
between theve hicle occupants and an air‐
bag. R
There are no objects between the seat, door
and door pillar (B-pillar).
R There are no hard objects, e.g. coat hangers,
hanging on the grab handles or coat hooks.
R There are no accessory parts, such as PNDs
(Personal Navigation Devices), mobile
phones or cup holders attached totheve hi‐
cle within the deployment area of an airbag,
e.g. on the cockpit, on doors, side windo ws
or side paneling.
In addition, no connecting cable, tensioning
st ra p or retaining stra p may be routed
th ro ugh or attached in the deployment area
of an airbag. Alw ays obser vethe accesso ry
manufacturer's ins tallation instructions, in
particular the information on suitable places
fo r ins tallation.
R There are no heavy, sharp-edged or fragile
objects in the poc kets of your clo thing. Store
such objects in a suitable place. Occupant saf
ety39

Limited pr
otection from airbags &
WARNING Risk of inju rydue tomodifi‐
cations tothe airbag co ver
If yo u modify the co ver of an airbag or af fix
objects such as sticke rs to it,the airbag may
no longer function cor rectl y. #
Never modify the co ver of an airbag and
do not af fix objects toit. The ins
tallation location of an airbag is identified
by the AIRB AGsymbol (→ page37). &
WARNING Risk of inju ryor death due to
th e use of unsuitable seat co vers
Uns uitable seat co vers can obstruct or pre‐
ve nt the deployment of air bags integrated
into the seats.
Consequentl y,the air bags cann otprotect
ve hicle occupants as they are designed to
do. In addition, operation of the automatic
front passenger air bag shutoff may be
re stricted. #
You should on lyuse seat co vers that
ha ve been appr oved forth e cor respond‐
ing seats byMercedes-Benz. &
WARNING Risk of inju rydue tomalfunc‐
tions of the sensors in the door paneling
Sensors tocontrol the airbags are located in
th e doors. Modifications or worknot per‐
fo rm ed cor rectly tothe doors or door panel‐
ing, as well as damaged doors, can lead to
th e function of the sensors being impaired.
The airbags might therefore not function
proper lyany more.
Consequent ly,th e airbags cann otprotect
ve hicle occupants as they are designed to
do. #
Never modify the doors or parts of the
doors. #
Alw ays ha vewo rkon the doors or door
paneling car ried out at a qualified spe‐
cialist workshop. &
WARNING Risk of inju rydue todeplo yed
airbag
A deplo yed airbag no longer has a pr otective
function and cann otprotect as intended in
th eev ent of an accident. #
Have theve hicle towe dto aqu alified
specialist workshop in order tohave the
deplo yed airbag replaced. Ha
ve deplo yed airbags replaced immediately. St
atus of the front passenger front airbag Fu
nction of the automatic front passenger
front airbag shu toff
The automatic front passenger front airbag shut‐
off is able todetect whe ther the front passenger
seat is occupied bya person or a child restra int
sy stem. The front passenger front airbag and
front passenger knee airbag are enabled or disa‐
bled accordingly. 40
Occupant saf ety

When ins
talling a child restra int sy stem on the
front passenger seat, alw ays make sure of the
fo llowing:
R Ensure that thech ild restra int sy stem is posi‐
tioned cor rectly (→ page 47).
R Alw ays obser vethech ild restra int sy stem
manufacturer's ins tallation instructions.
R Never place objects, e.g. cushions, under or
behind thech ild restra int sy stem.
R Fully retract the seat cushion length adjust‐
ment.
R The entire base of thech ild restra int sy stem
must alw aysre st on the seat cushion of the
front passenger seat.
R The backrest of thefo rw ard-facing child
re stra int sy stem must lie as flat as possible
against the backrest of the front passenger
seat.
R The child restra int sy stem must not touch the
ro of or be put under stra in by the head
re stra ints. Adjust the seat backrest inclina‐
tion and the head restra int setting accord‐
ingly. &
WARNING Risk of inju ryor death due to
objects between the sitting sur face and
th ech ild restra int sy stem
Objects between the sitting sur face and the
ch ild restra int sy stem could af fect the func‐
tion of the automatic front passenger airbag
shutoff.
This could result in the front passenger air‐
bag not functioning as intended during an
accident. #
Do not place any objects between the
sitting sur face and thech ild restra int
sy stem. #
The entire base of thech ild restra int
sy stem must alw aysre st on the sitting
sur face of the front passenger seat. #
The backrest of thefo rw ard-facing child
re stra int sy stem must, as far as possi‐
ble, be resting on the seat backrest of
th e front passenger seat. #
Alw ays comply with thech ild restra int
sy stem manufacturer's ins tallation
instructions. A person on
the front passenger seat must
obser vethefo llowing information:
R Fasten seat belts cor rectly (→ page 32).
R Sit in an almost upright seat position with
th eir back against the seat backrest.
R Sit with their feet resting on thefloor, if pos‐
sible.
The front passenger front airbag may otherwise
be disabled bymis take ,fo rex ample in thefo l‐
lowing situations:
R The front passen ger transfers their weight by
supporting themselves on a vehicle armrest.
R The front passenger sits in such a wayth at
th eir weight is raised from the sitting sur‐
fa ce. &
WARNING Risk of inju ryor death due to
deactivated front passenger airbag
If th ePA SSENGER AIR BAG OFF indicator
lamp is lit, the front passenger airbag is disa‐
bled. It will not be deplo yed in theev ent of
an accident and cann otper form its intended
pr otective function. Occupant saf
ety41

A pe
rson in the front passenger seat could
th en, forex ample, come into con tact wi th
th eve hicle interior, especially if the person is
sitting too close tothe cockpit.
If th e front passenger seat is occupied,
alw ays ensure that:
R The classification of the person in the
front passenger seat is cor rect and the
front passenger airbag is enabled or disa‐
bled in accordance with the person in the
front passenger seat.
R The front passenger seat has been mo ved
as far back as possible.
R The person is seated cor rectl y. #
Ensu re, bo thbefore and during the jour‐
ne y,that thest atus of the front
passenger airbag is cor rect. If
th e front passenger seat is occupied, the clas‐
sification of the person or child restra int sy stem
on the front passenger seat take s place af terthe
front passenger front airbag shutoff self-test.
The PASSENGER AIR BAG indicator lamps dis‐ play
thest atus of the front passenger front air‐
bag.
Alw ays obser vethe no tes on the function of the
PA SSENGER AIR BAG indicator lamps
(→ page 42).
Fu nction of thePA SSENGER AIR BAG indica‐
to r lamps Self-
test of automatic front passenger front
airbag shu toff
When the ignition is switched on, a self-test is
per form ed during which the two PASSENGER
AIR BAG ON and OFF indicator lamps light up
simul taneously.
The status of the front passenger front airbag is
displa yed af terth e self-tes t:
R PASSENGER AIR BAG ON lights up for
60 seconds, subsequently bo thindicator
lamps are off (PASSENGER AIR BAG ON and
OFF): the front passenger front airbag is able
to deploy in theeve nt of an accident.
R PASSENGER AIR BAG OFF lights up continu‐
ously: the front passenger front airbag is dis‐
abled. It will then not be deplo yed in the
eve nt of an accident.
If th ePA SSENGER AIR BAG ON indicator lamp is
off, on lythePA SSENGER AIR BAG OFF indicator
lamp sho ws thest atus of the front passenger
front airbag. The PASSENGER AIR BAG OFF indi‐
cator lamp may be lit continuously or be off.
If th ePA SSENGER AIR BAG OFF indicator lamp
and the0075 restra int sy stem warning lamp 42
Occupant saf ety

light up simultaneousl
y,the front passenger seat
may not be used. Also in this case, do not ins tall
a ch ild restra int sy stem on the front passenger
seat. Ha veautomatic front passenger front air‐
bag shutoff checked and repaired immediately at
a qu alified specialist workshop.
St atus display
If th e front passenger seat is occupied, ensure,
bo th before and during the journe y,that thest a‐
tus of the front passenger front airbag is cor rect
fo rth e cur rent situation.
Af ter in stalling a rear wa rd-facing child
re stra int sy stem on the front passenger
seat: PASSENGER AIR BAG OFF must be lit con‐
tinuousl y. &
WARNING Risk of inju ryor death from
using a rear wa rd-facing child restra int
sy stem when the front passenger front
airbag is enabled
If yo u secure a child in a rear wa rd-facing
ch ild restra int sy stem on the front passenger
seat and thePA SSENGER AIR BAG OFF indi‐ cator lamp is off,
the front passenger airbag
can deploy in theev ent of an accident.
The child could be stru ck bythe airbag.
Alw ays ensure that the front passenger air‐
bag is deactivated. The PASSENGER AIR BAG
OFF indicator lamp must be lit.
NEVER use a rear wa rd-facing child restra int
sy stem on a seat pr otected byan ENABLED
FRONT AIRB AGin front of it, DE ATH or SERI‐
OUS INJU RYtotheCH ILD can occur. When ins
talling a child restra int sy stem on the
front passenger seat, obse rveth eve hicle-spe‐
cific information (→ page 55).
Depending on thech ild restra int sy stem and the
st ature of thech ild, thePA SSENGER AIR BAG
OFF indicator lamp may be off. In this case, do
not ins tallth ere ar wa rd-facing child restra int
sy stem on the front passenger seat.
Ins tead, ins tallth ere ar wa rd-facing child
re stra int sy stem on a suitable rear seat.
Af ter in stalling a forw ard-facing child
re stra int sy stem on the front passenger
seat: depending on thech ild restra int sy stem and
thest ature of thech ild, PASSENGER AIR
BA G OFF may be lit continuously or be off.
Alw ays obser vethefo llowing information. &
WARNING Risk of inju ryor death due to
incor rect positioning of thefo rw ard-
fa cing child restra int sy stem
If yo u secure a child in a forw ard-facing child
re stra int sy stem on the front passenger seat
and you position the front passenger seat too
close tothe dashboard, in theeve nt of an
accident, thech ild could:
R come into con tact wi thparts of theve hi‐
cle interior if thePA SSENGER AIR BAG
OFF indicator lamp is lit, forex ample
R bestru ck bythe airbag if thePA SSENGER
AIR BAG OFF indicator lamp is off #
Alw ays mo vethe front passenger seat
as far back as possible and fully retract
th e seat cushion length adjustment.
Alw ays make sure that the shoulder belt
st ra p is cor rectly routed from the seat
belt outlet on theve hicle tothe shoul‐
der belt guide on thech ild restra int sys‐ Occupant saf
ety43

te
m. The shoulder belt stra p must be
ro uted forw ards and down wards from
th e seat belt outlet. If necessar y,adjust
th e front passenger seat according ly.#
Alw ays obser vethech ild restra int sys‐
te m manufacturer's ins tallation instruc‐
tions. When ins
talling a child restra int sy stem on the
front passenger seat, obse rveth eve hicle-spe‐
cific information (→ page 55).
If a person is sitting on the front passenger
seat: PASSENGER AIR BAG OFF may be lit con‐
tinuously or be off, depending on the person's
st ature.
A person on the front passenger seat must
alw ays obser vethefo llowing information:
R Ifth e front passenger seat is occupied byan
adult or a person with a stature cor respond‐
ing tothat of an adult, thePA SSENGER AIR
BA G OFF indicator lamp must be off. This
indicates that the front passenger front air‐
bag is enabled. If
th ePA SSENGER AIR BAG OFF indicator
lamp is lit continuousl y,an adult or person
with a build cor responding tothat of an adult
should not use the front passenger seat.
Ins tead, they should use a rear seat.
R Ifth e front passenger seat is occupied by a
person of smaller stature (e.g. a teenager or
small adult), thePA SSENGER AIR BAG OFF
indicator lamp either lights up continuously
or remains off, depending on there sult of the
classi fication.
- Ifth ePA SSENGER AIRB AGOFF indicator
lamp is off: mo vethe front passenger
seat as far back as possible or the person
of smaller stature should use a rear seat.
- Ifth ePA SSENGER AIRB AGOFF indicator
lamp is lit continuously: the person of
smaller stature should not use the front
passenger seat. &
WARNING Risk of inju ryor death when
th ePA SSENGER AIR BAG OFF indicator
lamp is lit
If th ePA SSENGER AIR BAG OFF indicator
lamp remains lit af terth e sy stem self-test,
th e front passenger air bag is deactivated. It
will not be deplo yed in theeve nt of an acci‐
dent. In this case, the front passenger air bag
cann otper form its intended pr otective func‐
tion, e.g. when a person is seated in the front
passenger seat.
That person could, forex ample, come into
con tact wi th theve hicle interior, especially if
th e person is sitting too close tothe cockpit.
If th e front passenger seat is occupied,
alw ays ensure that:
R The classification of the person in the
front passenger seat is cor rect and the
front passenger air bag is enabled or
deactivated in accordance with the per‐
son in the front passenger seat. 44
Occupant saf ety

R
The person is seated properly with a cor‐
rectly fastened seat belt.
R The front passenger seat has been mo ved
as far back as possible. Be sure
toalso obser vethefo llowing fur ther
re lated subjects:
R Child restra int sy stem on the front passenger
seat (→ page 55). Ro
ll bar &
DANG ER Risk of injury or death caused
by a malfunction of thero ll bars
If th e function of thero ll bars is defective,
th ey may not extend in an accident forex am‐
ple.
Consequent ly,thero ll bars cannot pr otect
ve hicle occupants as they are designed to
do. #
Have thero ll bars checked immediately
at a qualified specialist workshop. &
WARNING Risk of inju rywhen thero ll
bars are triggered
If th ero ll bars are triggered, there is a risk of
injur y.
Alw ays make sure that there is no thing in the
sweep of thero ll bars. &
WARNING Danger of inju ryor death
from obstructed roll bars
If yo u lea veobjects or items of clo thing on
th e co vers of thero ll bars, this may restrict
th ero ll bars as they ex tend.
Consequently, thero ll bars cannot pr otect as
th ey are designed todo. Furthermore, the
objects may endanger vehicle occupants
when thero ll bars extend. #
Alw ays make sure that there is no thing
in the sweep of thero ll bars. #
Alw aysstow and secure objects in the
ve hicle cor rectl y. The
roll bars are under the co vers behind the
re ar head restra ints. The roll bars are triggered
when danger of theve hicle rolling over is de tec‐
te d.
Once thero ll bars ha vebeen triggered, you can
no lon ger close a soft topth at is open. In this
case, consult the next qualified specialist work‐
shop. Occupant saf
ety45

PRE-SAFE
®
sy stem PRE-
SAFE®
(anticipa tory occupant pr otec‐
tion) PRE-
SAFE®
is able todetect cer tain critical driv‐
ing situations and implement pre-em ptive meas‐
ures toprotect theve hicle occupants.
PRE-SAFE ®
can implement thefo llowing meas‐
ures independently of each other:
R Tightening the seat belts on the driver's seat
and front passenger seat.
R Closing the side windo ws.
R Vehicles with memory function: Moving
th e front passenger seat toa more favo rable
seat position.
R Vehicles with multicontour seat: Increas‐
ing the air pressure in the seat side bols ters
of the seat backrest.
R PRE-SAFE ®
Sound: pr ovided that the multi‐
media sy stem is switched on, generates a
brief noise signal tostimulate the innate pro‐
te ctive mechanism of a person's hea ring. *
NO
TEDama gecaused byobjects in the
fo ot we ll or behind the seat The automatic adjustment of
the seat posi‐
tion may result in damage tothe seat and/or
th e object. #
Stow objects in a suitable place. Re
versing the PRE- SAFE®
sy stem measures If an accident did not occur,
the pre-em ptive
measures that we retake n are reve rsed.
Yo u will need toper form certain settings your‐
self. #
Ifth e seat belt pre-tensioning is not reduced,
mo vethe seat backrest back slightl y.
The locking mechanism releases. Fu
nction of PRE-SAFE ®
PLUS (anticipatory
occupant pr otection plus) PRE-
SAFE®
PLUS can de tect cer tain impacts,
particular lyan imminent rear impact, and take
pre-em ptive measures toprotect theve hicle occupants. These measures cannot necessarily
pr
eve nt an imminent impact.
PRE-SAFE ®
PLUS can implement thefo llowing
measures independently of each other:
R Tightening the seat belts on the driver's seat
and front passenger seat.
R Incre asing brake pressure when theve hicle
is stationar y.This brake application is can‐
celed automatically when theve hicle pulls
aw ay.
If an accident did not occur, the pre-em ptive
measures that we retake n are reve rsed.
Sy stem limitations
The sy stem will not initiate any action in thefo l‐
lowing situations:
R when backing up
The sy stem will not initiate any braking applica‐
tion in thefo llowing situations:
R whilst driving
or 46
Occupant saf ety

R
when entering or exiting a parking space
while using Active Parking Assist Safely transporting
children in theve hicle Alw
ays obser vewhen children are tr aveling
in theve hicle %
Also strictly obser vethe saf ety no tesfo rthe
specific situation. In this wa yyo u can recog‐
nize po tential risks and avoid dangers if chil‐
dren are tr aveling in theve hicle
(→ page 48).
Be diligent
Bear in mind that neglecting tosecure a child in
th ech ild restra int sy stem may ha veserious con‐
sequences. Alw ays be diligent in securing a child
carefully before everyjou rney.
To impr oveprotection forch ildren younger than
12 years old or under 5 ft(1.50 m) in height,
Mercedes-Benz recommends you obse rvethe
fo llowing information:
R Alw ays secure thech ild in a child restra int
sy stem suitable forth is Mercedes-Benz vehi‐
cle. R
The child restra int sy stem must be appropri‐
ate tothe age, weight and size of thech ild.
R The vehicle seat must be suitable for ins tal‐
ling a child restra int sy stem.
Ac cident statistics show that children secured in
th ere ar seats are generally sa ferth an children
secured in the front seats. Forth is reason,
Mercedes-Benz strongly advises that you ins tall
a ch ild restra int sy stem on a rear seat.
Generic term"child restra int sy stem"
The generic term child restra int sy stem is used
in this Operator's Manual. A child restra int sys‐
te m is, forex ample:
R a baby car seat
R are ar wa rd-facing child seat
R afo rw ard-facing child seat
R ach ild boos ter seat with a backrest and seat
belt guide
Mercedes-Benz recommends using a child
boos ter seat with a backrest.
The child restra int sy stem must be appropriate
to the age, weight and size of thech ild. Observing la
wsand legal requ irements
Alw ays obser vethe legal requ irements when
using a child restra int sy stem in theve hicle.
Observing standards forch ild restra int sys‐
te ms
All child restra int sy stems must meet thefo llow‐
ing standards:
R U.S. Federal Mo torVe hicle Saf etySt andards
21 3 and 225
R Canadian Mo torVe hicle Saf etySt andards
21 3 and 210.2
Confirmation that thech ild restra int sy stem
complies with thest andards can be found on an
instruction label on thech ild restra int sy stem.
This confi rmation can also be found in the ins tal‐
lation instructions that are included with the
ch ild restra int sy stem. Occupant saf
ety47

De
tecting risks, avoiding dan ger Securing sy
stems forch ild restra int sy stems
in theve hicle
Only use thefo llowing securing sy stems forch ild
re stra int sy stems:
R theLA TC H-type (ISOFIX) mounting brac kets
R theve hicle's seat belt sy stem
Ins talling a LATC H-type (ISOFIX) child restra int
sy stem is prefer red.
Simply attaching tothe securing rings on the
ve hicle can reduce therisk of ins talling thech ild
re stra int sy stem incor rectl y.
When securing a child with the integrated seat
belt of theLA TC H-type (ISOFIX) child restra int
sy stem, alw ays comply with the permissible
gross weight forth ech ild and child restra int sys‐
te m (→ page 52).
A boos ter seat may be necessary toachie ve
proper seat belt positioning forch ildren over
40 lbs (18 kg) in weight or until they reach a
height where a thre e-point seat belt can be
ins talled proper lywithout a boos ter seat. Mercedes-Benz
recommends a suitable child
boos ter seat with a backrest and seat belt guide.
Ad vantage of a rear wa rd-facing child
re stra int sy stem
It is preferable totranspo rta baby or a small
ch ild in a suitable rear wa rd-facing child restra int
sy stem. In this case, thech ild sits in the oppo‐
site direction tothe direction of tr avel and faces
ba ckwa rds.
Babies and small children ha vecompa ratively
we ak neck muscles in relation tothe size and
we ight of their head. The risk of injury tothe cer‐
vical spine during an accident can be reduced in
a re ar wa rd-facing child restra int sy stem.
Alw ays secure a child restra int sy stem cor‐
re ctly &
WARNING Risk of inju ryor death caused
by incor rect ins tallation of thech ild
re stra int sy stem
If th ech ild restra int sy stem is incor rectly
ins talled on a suitable seating position, it
cannot per form its intended pr otective func‐
tion. The
child cannot be restra ined in theeve nt of
an accident, heavy braking or a sudden
ch ange of direction. #
Alw ays comply with the manufacturer's
ins tallation instructions forth ech ild
re stra int sy stem and its cor rect use. #
Makesure that the entire base of the
ch ild restra int sy stem alw aysre sts on
th e sitting sur face of the seat. #
Never place objects under or behind
th ech ild restra int sy stem, e.g. cush‐
ions. #
Alw ays use child restra int sy stems with
th e original co ver designed forth em. #
Alw aysre place damaged co vers with
ge nuine co vers. &
WARNING Risk of inju ryor death from
unsecured child restra int sy stems in the
ve hicle
If th ech ild restra int sy stem is not cor rectly
ins talled or secured, it could release in the 48
Occupant saf ety