MERCEDES-BENZ S-CLASS CABRIOLET 2018 Owner's Guide

Ingeneral, this information documents thest ate
of a component part, a module, a sy stem or the
sur roundings such as:
Roperating statuses of sy stem components
(e.g. fluid leve ls, battery status, tire pressure)
Rstatus messages concerning theve hicle and
its individual components (e.g. number of
wheel revo lutions/speed, decele ration, lat‐
eral acceleration, display of thefast ened seat
belts)
Rmalfunctions or defects in impor tant sy stem
components (e.g. lights, brakes)
Rinformation on vehicle damage events
Rsystem reactions in special driving situations
(e.g. airbag deployment, inter vention of sta‐
bility control sy stems)
Rambient conditions (e.g. temp erature, rain
sensor)
In addition toprov iding the actual control unit
function, this data assists the manufacturer in
de tecting and rectifying malfunctions and opti‐
mizing vehicle functions. The majority of this
data is temp orary and is only processed in the ve
hicle itself. Only a small portion of the data is
st ored in theev ent or malfunction memor y.
When service workis done on your vehicle, the
te ch nical da tafrom theve hicle can be read out
by service network staff (e.g. workshops, manu‐
fa cturer) or third parties (e.g. breakdown serv‐
ices). Services include repair services, mainte‐
nance processes, warranty events a
nd
quality
assurance measures, forex ample. The read out
is per form ed via the legally prescribed port for
th e diagnostics connection in theve hicle. The
re spective service network locations or third
parties collect, process and use the data. They
document tech nical statuses of theve hicle,
assist in finding malfunctions and impr oving
qu ality and are transmitted tothe manufacturer,
if necessar y.Fu rthermore, the manufacturer is
subject toproduct liability. Forth is, the manu‐
fa cturer requirestech nical da tafrom vehicles.
Malfunction memories in theve hicle can be
re set bya service outlet as part of repair or
maintenance work.
They can enter data into theve hicle's comfort
and inf otainment functions themselves as part
of the selected equipment. These include:
Rmultimedia data such as music,
films or pho‐
to sfo r playba ckin an integrated multimedia
sy stem
Raddress book data for use in connection with
an integrated hands-free sy stem or an inte‐
grated navigation sy stem
Rentered navigation destinations
Rdata about the use of Internet services
This data can be sa ved locally in theve hicle or it
is located on a device which you ha veconnected
to theve hicle (e.g. smartphone, USB flash drive
or MP3 pla yer). If this data is stored in theve hi‐
cle, you c
an dele
teit at any time. This data can
only be transmitte dto third parties upon your
re qu est with particular rega rd tothe scope of
use of online services according toyour selected
settings.
Yo u can store or change con venience settings/
individualization in theve hicle at any time.
Depending on the equipment, this includes, for
ex ample:
Rseat and steering wheel position settings
General no tes 29

Rsuspension and climate control settings
Rindividualization such as interior lighting
If yo ur vehicle is accordingly equipped, you can
connect your smartphone or ano ther mobile end
device totheve hicle. You can cont rolth em via
th e control elements integrated in your vehicle.
Images and audio from the smartphone can be
output via the multimedia sy stem. Cer tain infor‐
mation is simultaneously transfer redto yo ur
smartphone.
Dependin g onthere spective integration type,
th is includes, forex ample:
Rge neral vehicle data
Rposition data
This enables the use of selected smartphone
apps, e.g. navigation or music playbac k.There is
no fur ther interaction between the smartphone
and theve hicle; in particular, vehicle data is not
directly accessible. Which type of fur ther data
processing occurs is de term ined bythe pr ovider
of the specific app used. Which settings you can
make, ifan y,depends on the specific app and
th e operating sy stem of your smartphone.
Online services
Wire less network connection
If yo ur vehicle has a wireless network connec‐
tion, it enables data tobe exc hanged between
yo ur vehicle and additional sy stems. The wire‐
less network connection is enabled via theve hi‐
cle's transmitter and receive r unit or via connec‐
te d mobile end devices (e.g. smartphones).
Online functions can be used via the wireless
network connection. This includes online serv‐
ices and applications/apps pr ovided bythe man‐
ufacturer or other pr oviders.
Manufa cturer's se rvices
Re garding online services of the manufacturer,
th e individual functions are described bythe
manufacturer in a sui table place (e.g. Operator's
Manual, website of the manufacturer) along with
th ere leva nt da taprotection information. Per‐
sonal data may be used forth e pr ovision of
online services. Data is exch anged via a secure
connection, e.g. the manufacturer's designated
IT sy stems. Personal data is collected, pro‐
cessed and used via the pr ovision of services exc
lusively on the basis of legal permissions or
with prior consent.
The services and functions (sometimes subject
to afe e) can usually be activated or deactivated.
In some cases, this also applies tothe entire
ve hicle's data connection. This excludes, in par‐
ticular, legally prescribed functions and services.
Third pa rty services
If it is possible touse online services from other
pr ov iders, th
ese services are subj
ecttothe data
pr otection and term s of use of there sponsible
pr ov ider. The manufacturer has no influence on
th e conte ntexc hanged.
Please inquire, therefore, about the type, scope
and purpose of the collection and use of per‐
sonal data as part of third party services from
th eir respective pr ovider.
COMAND/mbrace
Ifth eve hicle is equipped with COMAND or
mbrace, additional data about theve hicle's oper‐
ation, the use of theve hicle in cer tain situations,
30
General no tes

andthe location of theve hicle may be compiled
th ro ugh COMAND or the mbrace sy stem.
Fo r additional information please referto the
ch ap ter Multimedia sy stem and/or the mbrace
Te rm s and Conditions.
Event Data Recorders
This vehicle is equipped with an event data
re corder (EDR). The main purp ose of an EDR is
to record, in cer tain crash or near crash-like sit‐
uations, such as an air bag deployment or hitting
a ro ad obs tacle, data that will assist in under‐
st anding how a vehicle's sy stems per form ed.
The EDR is designed torecord data related to
ve hicle dynamics and saf etysy stems for a short
period of time, typically 30 seconds or less.
The EDR in this vehicle is designed torecord
such data as:
RHowvarious sy stems in your vehicle were
operating
RWhe ther or not the driver and front
passenger seat belts werebuckled/fas tened
RHow far (if at all) the driver was depressing
th e accelera tor and/or brake pedal and
RHow fasttheve hicle was tr aveling.
This data can help pr ovide a better under stand‐
ing of the circums tances in which accidents and
inju ries occur. NOTE: EDR data is recorded by
yo ur vehicle only if a non-trivial crash situation
occurs; no data is recorded bythe EDR under
normal driving conditions and no personal data
(e.g. name, gende r,age and crash location) is
re corded. Ho wever,ot her parties, such as law
enforcement, could combine the EDR data with
th e type of personally identifying data routinely
acquired during a crash in vestigation.
Ac cess tothe
ve hicle and/or the E
DR is needed
to read data that is recorded byan EDR, and
special equipment is required. In addition tothe
ve hicle manufacturer, other parties that ha vethe
special equipment, such as law enforcement,
can read the information byaccessing theve hi‐
cle or the EDR.
EDR data may be used in civil and criminal mat‐
te rs as a tool in accident reconstruction, acci‐
dent claims and vehicle saf ety. Since the Crash Data
Retrie val (CDR) tool that is used toextract
da ta from the EDR is commercially available,
Mercedes-Benz US A,LLC ("MBUSA") expressly
disclaims any and all liability arising from the
ex traction of this information byunauthorized
Mercedes-Benz personnel.
MBUSA willnot share EDR data with others with‐
out the consent of theve hicle owner or, if the
ve hicle is leased, without the consent of the les‐
see. Exceptions tothis representation include
re sponses tosubpoenas bylaw enforcement; by
fe deral, state or local go vernment; in connection
with or arising out of litigation in volvin g MBUSA
or its subsidiari es and affiliates; or, as requ ired
by law.
Wa rning: the EDR is a component of the
Re stra int Sy stem Module. Tamp ering with, alter‐
ing, modifying or removing the EDR component
may result in a malfunction of theRe
stra in
t Sys‐
te m Module and other sy stems.
St ate la wsorregulations rega rding EDRs that
con flict with federal regulation are pre-em pted.
This means that in theeve nt of such conflict,the
fe deral regulation go verns. As of February 20 13,
13 states ha veenacted la wsrelating toEDRs.
General no tes 31

Copyright
Free and open source software
Info rmation on free and open source software
licenses foryo ur vehicle's software can be found
on the data storage medium in your vehicle
document wallet and on the Internet toge ther
with updates:
http://www.mercedes-benz.com/opensource
Re gis tere d trademar ks
RBluetoo th®is a regis tere d trademark of Blue‐
toot h SIG Inc.
RDTS™ is a regis tere d trademark of DTS, Inc.
RDolby®and MLP™ are regis tere d trademar ks
of DOLBY Laboratories.
RBabySmart™, ESP®and PRE-SAFE®are reg‐
is te re d trademar ksof Daimler AG.
RHomeLink®is a regis tere d trademark of
Johnson Contro ls.
RiPod®andiTunes®are regis tere d trademar ks
of Apple Inc.
RBurmes ter®is a regis tere d trademark of
Burmes terAu diosy steme GmbH.
RMicrosoft®and Windo wsMedia®are regis‐
te re d trademar ksof Microsoft Corporation.
RSIRIUS®is a regis tere d trademark of Sirius
XM Radio Inc.
RHD Radio™ is a regis tere d trademark of iBiq‐
uity Digital Corporation.
RGraceno te®is aregis tere d trademark of
Graceno te, Inc.
RZAGA TSurve y®and related brands are regis‐
te re d trademar ksof ZagatSur vey, LLC.
32
General no tes

Restra int sy stem
Pr otection bythere stra int sy stem
The restra int sy stem includes thefo llowing:
RSeat belt sy stem
RAirbags
RChild restra int sy stem
RChild seat securing sy stem
The restra int sy stem can reduce therisk of vehi‐
cle occupants coming into contact with parts of
th eve hicle interior in theeve nt of an accident. In
th eev ent of an accident, there stra int sy stem
can also reduce thefo rc es towhich theve hicle
occupants are subjected.
A seat belt can only pr ovide the best le vel of pro‐
te ction if it is worncor rectl y.Depending on the
de tected accident situation, Emergency Tension‐
ing Devices and/or airbags supplement the pro‐
te ction of fere dby a cor rectly wornseat belt.
Emer gency Tensioning Devices and/or airbags
are not depl oyed in everyaccident. In order
forth ere stra int sy stem toprov ide the
intended le vel of pr otection, each vehicle occu‐
pant must obser vethefo llowing information:
RFa sten seat belts cor rectl y.
RSit in an almost up right seat position with
th eir back against the seat backrest.
RSit with their feet resting on thefloor, if pos‐
sible.
RAlw ays secure persons under 5 ft(1.50 m)
ta ll in an additional restra int sy stem suitable
fo r Mercedes-Benz vehicles.
Ho wever,no sy stem available today can com‐
ple tely eliminate injuries and
fata lit
ies in every
accident situation. In particular, the seat belt
and airbag generally do not pr otect against
objects penetrating theve hicle from the outside.
It is also not possible tocomplet elyrule out the
ri sk of injury caused bythe airbag deploying.
Re duced restra int sy stem pr otection
&
WARNING Risk of injury or death from
modifications tothere stra int sy stem
The restra int sy stem can no longer function
cor rectly af ter alterations ha vebeen made.
The restra int sy stem may then not pr otect
th eve hicle occupants as intended byfailing
in an accident or triggering unexpec tedly, for
ex ample
#Ne ver alter the parts of there stra int
sy stem.
#Ne verta mp er with the wiring or any
electronic component parts or their
software.
RIf it is necessary tomodify theve hicle to
accommodate a person with disabilities, con‐
ta ct a Mercedes-Benz service center for
de tails.
RUSA only: for de tails, con tact our Cu stomer
Assis tance Center on 1-800-FOR-MERCedes
(1‑800‑367‑63 72).
Occupant saf ety 33

Restra int sy stem functionality
When the ignition is switched on, a self-test is
per form ed, during which the6 restra int sys‐
te m wa rning lamp lights up. It goes out no later
th an a few seconds af terth eve hicle is star ted.
The components of there stra int sy stem are then
functional.
Malfunctioning restra int sy stem
A malfunction has occur red in there stra int sys‐
te m if:
RThe 6 restra int sy stem warning lamp
does not light up when the ignition is
switched on.
RThe 6 restra int sy stem warning lamp
lights up continuously or repeatedly during a
journe y.
&
WARNING Risk of injury orfata l injury
due toa malfunction in there stra int sys‐
te m
If th ere stra int sy stem is malfunctioning,
re stra int sy stem components may be trig‐
ge red unintentionally or might not be trig‐
ge red at all in theeve nt of an accident. This
may af fect the Emer gency Tensioning Device
or airbag, forex ample.
#Ha ve there stra int sy stem checked and
re paired immediately at a qualified spe‐
cialist workshop.
Fu nction of there stra int sy stem in an acci‐
dent
How there stra int sy stem works is de term ined by
th e se verity of the impact de tected and the type
of accident anticipated:
RFr ontal impact
RRe ar impact
RSide impact
RRo llover The activation
thre sholds forth e components of
th ere stra int sy stem are de term ined based on
th eev aluation of the sensor values measured at
va rious points in theve hicle. This process is pre-
em ptive in nature. The triggering/deployment of
th e components of there stra int sy stem must
ta ke place in good time at thest art of the colli‐
sion.
Fa ctors whi chcan only be seen and measure d
af te r a collision has occur red cann otplay a deci‐
sive role in airbag deployment, nor do they pro‐
vide an indication of airbag deployment.
The vehicle may be deformed significantly with‐
out an airbag being deplo yed. This is the case if
only parts which are relatively easily deformed
are af fected and thera te ofvehicle deceleration
is not high. Con versely, an airbag may be
deplo yedev en though theve hicle suf fers only
minor deformation. If very rigid vehicle parts
such as longitudinal members are hit, forex am‐
ple, this may result in suf ficiently high le vels of
ve hicle deceleration.
34
Occupant saf ety

The components of there stra int sy stem can
be activated or deplo yed independently of
each other:
Component De tected deploy‐
ment situation
Emer gency Tension‐
ing Devices Fr
ontal impact, rear
impact, side impact,
ro llo ver
Driver's airbag, front
passenger airbag Fr
ontal impact
Knee airbag Frontal impact
Side impact airbag Side impact
Wi ndow airba gS ide impact,rollo ver,
frontal impact
The front passenger airbag can only be deploy ed
in an accident if thePA SSENGER AIR BAG OFF
indicator lamp is off. If the front passenger seat
is occupied, make sure, bo thbefore and during
th e journe y,that thest atus of the front
passenger airbag is cor rect (
→page 45)
(→page 45).
& WARNING Risk of burn s from hot air bag
components
The air bag parts are hot af ter an air bag has
been deploy ed.
#Do nottouch the air bag parts.
#Ha ve a deplo yed air bag replaced at a
qu alified specialist workshop as soon
as possible.
Mercedes-Benz recommends that you ha vethe
ve hicle towe dto aqu alified specialist workshop
af te r an accident. Take this into account, partic‐
ularly if an Emer gency Tensioning Device is trig‐
ge red or an airbag deplo yed.
If th e Emer gency Tensioning Devices are trig‐
ge red or an airbag is deplo yed, youwill hear a
bang, and a small amount of powder may also be
re leased:
RThe bang will not generally af fect your hear‐
ing.
RIn general, the powder released is not haz‐
ardous tohealth but may cause short-term breathing dif
ficulties topersons suf fering
from as thma or other pulmonary conditions.
Pr ov ided it is safe todo so, lea vetheve hicle
immediately or open the window in order to
pr eve nt brea thing dif ficulties.
Airbags and pyrotech nic Emergency Tensioning
Devices contain pe rchlorate material, which may
re qu ire special handling or environmental pro‐
te ction measure s.Na tional guidelines rega rding
wa ste disposal must be obser ved. In California,
see http://www.dtsc.ca.gov/HazardousWas te/
Pe rchlorate/index.cfm.
Seat belts
Pr otection pr ovided bythe seat belt
Alw aysfast enyour seat belt co rrectly before
st arting a journe y.A seat belt can only pr ovide
th e best le vel of pr otection if it is worncor rectl y.
Occupant saf ety 35

&WARNING Risk of injury or death dueto
incor rectly fastened seat belt
If th e seat belt is not worncor rectly, it can‐
not per form its intended pr otective function.
In addition, an incor rectly fastened seat belt
can also cause injuries, forex ample, in the
ev ent of an accident or when braking or
ch anging direction suddenly .
#Always ensure that all vehicle occu‐
pants ha vetheir seat belts fastened
cor rectly and are sitting prope rly.
Alw ays obser vethe instructions about the cor‐
re ct driver's seat position and adjusting the seat
(
→page 81).
In order forth e cor rectly wornseat belt topro‐
vide the intended le vel of pr otection, each vehi‐
cle occupant must obser vethefo llowing infor‐
mation:
RThe seat belt must not be twis ted and must
fi t tightly and snugl yacross the body.
RThe seat belt must be routed across the cen‐
te r of the shoulder and as low down across
th e hips as possible.
RThe shoulder section of the seat belt should
not touch your ne cknor be routed under
yo ur arm or behind your bac k.
RAvoid wearing bulky clo thing, e.g. a winter
coat.
RPush the lap belt down as far as possible
across your hips and pull tight with the shoul‐
der section of the belt. Ne verro ute the lap
belt across your abdomen.
RNe verro ute the seat belt across sharp, poin‐
te d, abrasive or fragile objects.
ROnly one person should use each seat belt at
any one time. Ne ver all owbabies and chil‐
dren totrave l sitting on the lap of ano ther
ve hicle occupant.
RNe ver secure objects with a seat belt if the
seat belt is also being used byone of the
ve hicle's occupants. Alw ays obser vethe
instructions for loading theve hicle when
securing objects, luggage or loads
(
→page 94). Also ensure
that no obj ects, e.
g. a cushion,
are ever placed between a person and the
seat.
The seat belts on thefo llowing seats are equip‐
ped with a child seat saf etyfe ature:
RFr ont passenger seat
RRe ar seats
Ac tivating or deacti vating thech ild seat saf ety
fe ature on the seat belt (
→page 51).
If ch ildren are tra veling in theve hicle, be sure to
obser vethe instructions and saf etyno tes on
"Children in theve hicle" (
→page 49).
Re duced seat belt pr otection
&
WARNING Risk of injury or death dueto
incor rect seat position
The seat belt does not of ferth e intended
le ve l of pr otection if you ha venot mo vedth e
seat backrest toan almost vertical position.
36
Occupant saf ety

When braking or intheeve nt of an accident,
yo u could slideunderneath the seat belt and
sus tain abdominal or neck injuries, forex am‐
ple.
#Ad just the seat proper lybefore begin‐
ning your journe y.
#Always ensure that the seat backrest is
in an almost vertical position and that
th e shoulder section of your seat belt is
ro uted across the center of your shoul‐
der.
& WARNING Risk of injury or death dueto
an extended seat belt extender while the
ve hicle is in motion
If th e seat belt extender is extended while
th eve hicle is in motion, the seat belt will not
fi t cor rectly tothe body.
The seat belt may not then pr ovide the
proper pr otection.
#Alw ays ensure that the seat belt
ex tender is retracted while theve hicle
is in motion.
If th e seat belt extender does not retract au to‐
matically, it can be retracted manually. Todo so,
press the seat belt extender ba ckasfar as it will
go before starting theve hicle. Pressing the seat
belt extender ba ckinto place requ ires forc e.
&
WARNING Risk of injury or death when
additional restra int sy stems are not used
fo r persons with a smaller build
Pe rsons under 5 ft(1.50 m) tall cannot wear
th e seat belt cor rectly wi thout a suitable
additional restra int sy stem.
If th e seat belt is not worncor rectly, it can‐
not per form its intended pr otective function.
In addition, an incor rectly fastened seat belt
can also cause injuries, forex ample, in the
ev ent of an accident or when braking or
ch anging direction suddenly .
#Always secure persons under 5 ft
(1.50 m) tall in a suitable restra int sys‐
te m.
&
WARNING Risk of injury or death dueto
damaged or modified seat belts
Seat belts cann otprov ide pr otection in the
fo llowing situations:
RIf th e seat belts are damaged, modified,
ex treme lydirty, bleached or dyed
RIfth e seat belt buckle is damaged or
ex treme lydirty
RIfth e Emer gency Tensioning Devices,
seat belt anchorages or seat belt retrac‐
to rs have been modified
Seat belts may be damaged in an accident,
although the damage may not be visible, e.g.
due tosplinters of glass.
Modified or damaged seat belts may tear or
fa il, e.g. in an accident.
Modified Emer gency Tensioning Devices can
accidental lytrig ger or failto function as
intended.
#Ne ver modify the seat belts, Emer gency
Te nsioning Devices, seat belt ancho‐
ra ge s or seat belt retractors.
Occupant safe ty37

#Make surethat the seat belts are
undamaged, not wornand clean.
#Alw ays ha vethe seat belts checked
immediately af ter an accident at a
qu alified specialist workshop.
Only use seat belts that ha vebeen appr ovedfo r
yo ur vehicle byMercedes-Benz.
&
WARNING Risk of injury or death from
deplo yedpy rotech nic Emergency Ten‐
sioning Devices
Pyro tech nic Emergency Tensioning Devices
th at ha vebeen deplo yed are no longer opera‐
tional and are unable toper form their inten‐
ded pr otective function.
#Therefore, ha vedeplo yedpy rotech nic
Emergency Tensioning Devices immedi‐
ately replaced at a qualified specialist
wo rkshop.
Mercedes-Benz recommends that you ha vethe
ve hicle towe dto aqu alified specialist workshop
af te r an accident. *
NO
TEDama gecaused bytrapping the
seat belt
If an unused seat belt is not fully retracted, it
may become trapped in the door or in the
seat mechanism.
#Alw ays ensure that an unused seat belt
is fully retracted.
Ex tending/r etra cting the seat belt extender
The seat belt extender forth e front seat helps
yo ufa sten your seat belt. When the door is
closed, the seat belt extender extends.
Yo u can also extend the seat belt extender using
th e seat belt extender button.
#Switch on the ignition.
#Press seat belt extender button 1.
The seat belt extender extends.
The seat belt extender retracts again in thefo l‐
lowing cases:
RThe seat belt tongue is engaged in the seat
belt buckle
38 Occupant saf ety