ECU MERCEDES-BENZ S-CLASS CABRIOLET 2019 Owner's Manual

If
th e underbody paneling is damaged, flam‐
mable materials such as lea ves, grass or
twigs can collect between the underbody and
th e underbody paneling. These materials may
ignite if they come into contact wi thhot
parts on theex haust sy stem. #
Have theve hicle checked and repaired
immediately at a qualified specialist
wo rkshop.
or #
If driving saf ety is impaired while con‐
tinuing your journe y,pull over and stop
th eve hicle immediately in accordance
with the traf fic conditions, and contact
a qu alified specialist workshop. Declaration of conformity
for wi reless vehi‐
cle comp onents
USA: "The wireless devices of this vehicle com‐
ply with Part15 ofthe FCC Rules. Operation is
subject tothefo llowing two conditions: 1) These
devices may not cause harmful inter fere nce, and
2) These devices mu staccept any inter fere nce re
cei ved, including inter fere nce that may cause
undesired operation. Chan ges or modifications
not expressly appr ovedby the party responsible
fo r compliance could void the user's authority to
operate the equipment."
Canada: "The wireless devices of this vehicle
comply with Industry Canada license-e xempt
RSS standard(s). Operation is subject tothefo l‐
lowing two conditions: (1) These devices may
not cause inter fere nce, and (2) These devices
mu staccept any inter fere nce, including inter fer‐
ence that may cause undesired operation of the
device."
USA: "Wireless charging sy stem for mobile devi‐
ces (Model: D-WMI20 15A): this device complies
with Part18 ofthe FCC Rules."
The name and address of there sponsible party
is:
Continental Automotive Sy stems US Inc.
24 00 Executive Hills Drive
Au burn Hills, MI 48326-2980
Uni tedSt ates of America Diagnostics connection
The diagnostics connection is on ly intended for
th e connection of diagnostic devices at a quali‐
fi ed specialist workshop. &
WARNING Risk of accident due tocon‐
necting devices tothe diagnostics con‐
nection
If yo u connect equipment toa diagnostics
connection in theve hicle, it may af fect the
operation of vehicle sy stems.
As a result, the operating saf ety of theve hi‐
cle could be af fected. #
Only connect equipment toa diagnos‐
tics connection in theve hicle which is
appr ovedfo ryo ur vehicle byMercedes-
Benz. &
WARNING Risk of accident due to
objects in the driver's foot we ll
Objects in the driver's foot we ll may impede
pedal tr avel or block a depressed pedal. General no
tes23

This jeopardizes
the operating and road
saf ety of theve hicle. #
Stow all objects in theve hicle securely
so that they cannot getinto the driver's
fo ot we ll. #
Alw ays ins tallth efloor mats securely
and as prescribed in order toensure
th at there is alw ays suf ficient room for
th e pedals. #
Do not use loose floor mats and do not
place floor mats on top of one ano ther. *
NO
TEBattery discharging from using
devices connected tothe diagnostics
connection Using devices at
the diagnostics connection
drains the batter y. #
Check thech arge leve l of the batter y. #
Ifth ech arge leve l is lo w,charge the
batter y,e.g. bydriving a considerable
dis tance. Connecting equipment
tothe diagnostics con‐
nection can lead toemissions monitoring infor‐
mation being reset, forex ample. This may lead
to theve hicle failing tomeet therequ irements of
th e next emissions inspection during the main
inspection. Qualified specialist
workshop
An authorized Mercedes-Benz Center is a quali‐
fi ed specialist workshop. It has the necessary
special skills, tools and qualifications tocor‐
re ctly car ryout thewo rkrequ ired on your vehi‐
cle. This particular lyapplies tosaf ety-re leva nt
wo rks.
Fo rth efo llowing, alw ays ha veyour vehicle
ch ecked at an authorized Mercedes-Benz Cen‐
te r:
R safety-re leva nt wo rks
R service and maintenance work
R repair work
R modifications as well as ins tallations and
con versions
R workon electronic components Mercedes‑Benz
recommends a Mercedes‑Benz
service center. Co
rrect use of theve hicle
If yo ure mo veany warning sticke rs,yo u or others
could failto recognize cer tain dangers. Lea ve
wa rning sticke rs in position.
Obser vethefo llowing information in particular
when driving your vehicle:
R the saf ety no tes in this manual
R tech nical da taforth eve hicle
R traf fic ru les and regulations
R laws and saf etyst andards per taining to
mo torve hicles Problems with
your vehicle
If yo u should experience a problem with your
ve hicle, particular lyone that you belie vemay
af fect its safe ope ration, weurge youto contact
an au thorized Mercedes-Benz Center immedi‐
ately tohave the problem diagnosed and recti‐
fi ed. If the problem is not resol vedto yo ur satis‐ 24
General no tes

fa
ction, please discuss the problem again with
an authorized Mercedes-Benz Center or, if nec‐
essar y,contact us at one of thefo llowing
addresses:
In the USA:
Mercedes-Benz US A,LLC
Cus tomer Assis tance Center
One Mercedes-Benz Drive
Sandy Springs, GA 30328
In Canada:
Mercedes-Benz Canada, Inc.
Cu stomer Relations Department
98 Vande rhoof Avenue
To ronto, Ontario M4G 4C9 Re
porting saf ety defects
USA onl y:
The following text is published as required of
manufacturers under Title 49, Code of U.S. Fed‐
eral Regulations, Part57 5 pursuant tothe "National
Traf fic and Mo torVe hicle Saf etyAc t of
19 66".
If yo u belie vethat your vehicle has a defect
which could cause a crash or could cause injury
or death, you should immediately inform the
Na tional Highw ayTraf fic Saf etyAd ministration
(NHT SA) in addition tonotifying Mercedes-Benz
US A,LLC.
If NHT SArecei ves similar complaints, it may
open an in vestigation, and if it finds that a saf ety
defect exists in a group of vehicles, it may order
a re call and remedy campaign. Ho wever,NHT SA
cannot become in volved in individual problems
between you, your dealer, or Mercedes-Benz
US A,LLC.
To contact NHT SA,yo u may call theVe hicle
Saf ety Hotline toll-f ree at 1-888-327-4236
(TT Y:1-800-424-9 153) (inside the USA); go to
http://www.safercar.gov; or write to:Ad minis‐
trator, NHT SA, 400 Se venth Street,SW .,Wa sh‐
ington, DC 20590, US A.
Fu rther information on vehicle saf ety can be
fo und at: http://www.safercar.g ov Limited
Warranty
* NO
TEDama getotheve hicle arising
from violation of these operating instruc‐
tions. Damage
totheve hicle can arise from viola‐
tion of these operating instructions.
This damage is not co vered either bythe
Mercedes-Benz implied warranty or bythe
New‑ or Used- Vehicle Warrant y. #
Follow the instructions in these operat‐
ing instructions on proper operation of
yo ur vehicle as well as on possible vehi‐
cle damage. QR code
forre scue card
The QR code is secured in the fuel filler flap and
on the opposite side on the B-pillar. In theeve nt
of an accident, rescue services can use the QR
code toquickly find the appropriate rescue card
fo ryo ur vehicle. The cur rent rescue card con‐
ta ins the most impor tant information about your General no
tes25

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, these services are subject tothe 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
If
th 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,
and the 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 USA onl
y:
This vehicle is equipped with an event data
re corder (EDR). The main pu rpose of an EDR is
to record, in cer tain crash or near crash-like sit‐
uations, such as an airbag deployment or hitting
a ro ad obs tacle, da tathat will assist in under‐
st anding how a vehicle's sy stems per form ed.
The EDR is designed torecord da tarelated to
ve hicle dynamics and saf ety sy stems for a short
period of time, typically 30 seconds or less. The EDR in
this vehicle is designed torecord
su ch data as:
R How various sy stems in your vehicle were
operating
R Whe ther or not the driver and front
passenger seat belts werebuckled/fas tened
R How far (if at all) the driver was depressing
th e accelera tor and/or brake pedal and
R How 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 accident location) is
re corded. Ho wever,ot her parties, such as law
enforcement, could combine EDR data with the
type of pe rsonally identifying data routinely
acquired during a crash in vestigation.
Ac cess totheve hicle and/or the EDR is needed
to read data that is recorded bythe EDR, and
special equipment is required. In addition tothe
ve hicle manufacturer, other parties that ha vethe 28
General no tes

Re
stra int sy stem Pr
otection bythere stra int sy stem The
restra int sy stem includes thefo llowing com‐
ponents:
R Seat belt sy stem
R Airbags
R Child restra int sy stem
R Child 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's interior in theeve nt of an accident.
The restra int sy stem can also reduce thefo rc es
to which vehicle occupants are subjected in the
eve nt of an accident.
Only a seat belt which is worncor rectly can pro‐
vide the intended le vel of pr otection. Depending
on the de tected accident situation, Emergency
Te nsioning Devices and/or airbags supplement a
cor rectly wornseat belt. Emer gency Tensioning
Devices and/or airbags are not depl oyed in
eve ryaccident. Fo
rth ere stra int sy stem toprov ide its full pr otec‐
tion, each occupant must obser vethefo llowing:
R Fasten the seat belt cor rectl y.
R Be in an almost up right position with their
back against the seat backrest.
R Sit with their feet resting on thefloor, if pos‐
sible.
R Alw 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 lities in every
accident situation. In particular, the seat belt
and airbag generally do not pr otect against
objects penetrating theve hicle from the outside.
The risk of an injury resulting from airbag
deployment also cannot be ruled out entirel y. Re
duced restra int sy stem pr otection &
WARNING Risk of inju ryor 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 #
Never alter the parts of there stra int
sy stem. #
Neverta mp er with the wiring or any
electronic component parts or their
software. If it is necessary
tomodify theve hicle toaccom‐
modate a person with disabilities, con tact an
au thorized Mercedes-Benz Center for de tails.
USA only: for de tails, con tact our Cu stomer
Assis tance Center on 1-800-FOR-MERCedes
(1‑800‑367‑63 72). 30
Occupant saf ety

&
WARNING Risk of inju ryor death due to
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 sudden ly.#
Alw ays 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 85).
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:
R The seat belt must not be twis ted and must
fi t tightly and snu gly across the body. R
The seat belt must be routed across the cen‐
te r of the shoulder and as low down across
th e hips as possible.
R The shoulder section of the seat belt should
not touch your ne cknor be routed under
yo ur arm or behind your bac k.
R Avoid wearing bulky clo thing, e.g. a winter
coat.
R Push 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.
R Neverro ute the seat belt across sharp, poin‐
te d, abrasive or fragile objects.
R Only one person should use each seat belt at
any one time. Ne ver allow babies and chil‐
dren totrave l sitting on the lap of ano ther
ve hicle occupant.
R Never 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 99). Also ensure
that no objects, 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 special seat belt retractor:
R front-passenger seat
R Rear seats
Ac tivate or deacti vate the special seatbelt
re tractor (→ page 52).
If ch ildren are tra veling in theve hicle, be sure to
obser vethe instructions and saf ety no tes on
"Children in theve hicle" (→ page 48). Re
duced seat belt pr otection &
WARNING Risk of inju ryor death due to
incor rect seat position
The seat belt does not of ferth e intended
le ve l of pr otection if you ha venot mo vedthe
seat backrest toan almost vertical position. Occupant saf
ety33

When braking or in
theeve nt of an accident,
yo u could slide underneath the seat belt and
sus tain abdominal or neck injuries, forex am‐
ple. #
Adjust the seat proper lybefore begin‐
ning your journe y. #
Alw ays 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 inju ryor death due to
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 inju ryor 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 sudden ly. #
Alw ays secure persons under 5 ft
(1.50 m) tall in a suitable restra int sys‐
te m. &
WARNING Risk of inju ryor death due to
damaged or modified seat belts
Seat belts cann otprov ide pr otection in the
fo llowing situations:
R Ifth e seat belts are damaged, modified,
ex treme lydirty, bleached or dyed
R Ifth e seat belt buckle is damaged or
ex treme lydirty
R Ifth 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. #
Never modify the seat belts, Emer gency
Te nsioning Devices, seat belt ancho‐
ra ge s or seat belt retractors. 34
Occupant saf ety

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

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

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