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

standing 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 fast theve hicle was tr ave ling.
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 inve stigation. Ac
cess totheve hicle and/or the EDR is needed
to read data that is recorded byan EDR, and
special equipment is requ ired. In addition tothe
ve hicle manufacturer, other parties that ha vethe
special equipment, such as law enforcement,
can read the inf ormat
ion
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 will not 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 int 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 veen

acted la wsrelating toEDRs.
Co pyright
Fr ee 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 toget her
with updates:
http://www.mercedes-benz.com/opensource
General no tes 29

Regis 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.
30
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
RAir bags
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 air bags supplement the pro‐
te ction of fere dby a cor rectly wornseat belt.
Emer gency Tensioning Devices and/or air bags
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 elimin
ate in
juries and fata lities in every
accident situation. In particular, the seat belt
and air bag 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 air bag deploying.
Re duced restra int sy stem pr otection
0071
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
00BBNe ver alter the parts of there stra int
sy stem.
00BBNe 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 an au thorized Mercedes-Benz 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 31

Restra int sy stem functionality
When the ignition is switched on, a sy stem self-
te st is per form ed, during which the0075
re stra int sy stem warning lamp lights up. It goes
out no later than a few seconds af terth eve hicle
is star ted. The components of there stra int sys‐
te m are then functional.
Malfunctioning restra int sy stem
A malfunction has occur red in there stra int sys‐
te m if:
RThe 0075 restra int sy stem warning lamp
does not light up when the ignition is
switched on.
RThe 0075 restra int sy stem warning lamp
lights up continuously or repeatedly during a
journe y.
0071
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.
00BBHa 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 should
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 air bag deployment, nor do they pro‐
vide an indication of air bag deployment.
The vehicle may be deformed significantly with‐
out an air bag 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 air bag 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, theve hicle deceleration may be high enough
fo rth is to happen.
32
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 air bag, front
passenger air bag Fr
ontal impact
Knee air bag Frontal impact
Side air bag Side impact
Head air bag Side impact, rollo ver,
frontal impact
The front-passenger air bag can be deploy ed in
an accident only 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 air bag is cor rect (
→page 43).
0071
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.
00BBDo nottouch the air bag parts.
00BBHa 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 air bag is deplo yed.
If th e Emer gency Tensioning Devices are trig‐
ge red or an air bag is deplo yed, youwill hear a
bang, and po wdermay also be released:
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.
Air bags 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 must be
obser ved during disposal. 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.
0071
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.
Occupant saf ety 33

In addition, an incorrectly fastened seat belt
can also cause injuries, forex ample, in the
ev ent of an accident or when braking or
ch anging direction suddenly .
00BBAlways ensure that all vehicle occu‐
pants ha vetheir seat belts fastened
cor rectly and are sitting prope rly.
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 andpulltight withth e 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 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
ch ild seat saf etyfe at
ure:
RFront passenger seat
RRe ar seats
Ac tivate or deacti vate thech ild seat saf etyfe a‐
ture of the seat belt (
→page 50). If
ch ildren are tr aveling in theve hicle, be sure to
obser vethe instructions and saf etyno tes on
"Children in theve hicle" (
→page 47).
Re duced seat belt pr otection
0071
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.
When braking or in theev ent of an accident,
yo u could slide underneath the seat belt and
sus tain abdominal or neck injuries, forex am‐
ple.
00BBAd just the seat proper lybefore begin‐
ning your journe y.
00BBAlways 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.
34 Occupant saf ety

0071WARNING 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.
00BBAlw 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.
0071
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 .
00BBAlways secure persons under 5 ft
(1.50 m) tall in a suitable restra int sys‐
te m.
0071
WARNING Danger of injury or death
from bloc ked seat belt buckles
If seat belt buckles are bloc ked and cann ot
be mo ved down wards, the function of the
Emergency Tensioning Devices is impaire d.
The Emer gency Tensioning Devices can no
longer function as intended and the seat
belts can no longer pr ovide the intended pro‐
te ction.
00BBAlw ays ensure that the seat belt buck‐
les are not bloc ked.
0071
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.
00BBNe ver modify the seat belts, Emer gency
Te nsioning Devices, seat belt ancho‐
ra ge s or seat belt retractors.
Occupant safe ty35

00BBMake surethat the seat belts are
undamaged, not wornand clean.
00BBAlw 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.
0071
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.
00BBTherefore, 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. 0075
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.
00BBAlw 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.
00BBSwitch on the ignition.
00BBPress seat belt extender button 1.
The seat belt extender extends.
The seat belt extender is retracted again if:
Rth e seat belt tongue is engaged in the seat
belt buckle
Rth e seat belt tongue is not engaged in the
seat belt buckle within 60 seconds
36 Occupant saf ety

Inthis case, press seat-belt extender button
1 again. The seat belt extender extends
again.
Rth ere spective door is opened
Ryo ufo ld the seat backrest forw ards
Rnobody is sitting in the front passenger seat
If yo upr ess seat beltextender button 1
af te rth is, the seat-belt extender will no lon‐
ge rex tend.
The seat belt extender must always be retracted
while theve hicle is in motion.
Fa stening seat belts
Ifth e seat belt is pulled quickly or sharply, the
seat belt retractor lo cks. The seat belt stra p can‐
not be pulled out any fur ther.00BBAlw ays engage seat belt tongue 2ofthe
seat belt into seat belt buckle 1ofthe cor‐
re sponding seat.
Ve hicles with PRE-SAFE
®:If th e front seat belt
is not pulled tight across your body, the seat belt
adjustment may automatically apply a cer tain
tigh tening forc e. Do not hold the seat belt tightly
while it is adjusting. You can activate and deacti‐ va
te the seat belt adjustment function using the
multimedia sy stem.
Ve hicles with automatic front passenge r
front air bag shu toff:
0075 NO
TEDeployment of the Emer gency
Te nsioning Device and side air bag when
th e front passenger seat is unoccupied
Ifth e seat belt tongue is engaged in the seat
belt buckle of the unoccupied front
passenger seat, the Emer gency Tensioning
Device and the side air bag may also deploy
in theev ent of an accident along with other
sy stems.
00BBOnly one person should use each seat
belt at any one time.
Ve hicles without automatic front passenge r
front air bag shu toff:
Occupant safe ty37

0075NO
TEDeployment of the Emer gency
Te nsioning Device when the front
passenger seat is unoccupied
If th e seat belt tongue is engaged in the seat
belt buckle of the unoccupied front
passenger seat, the Emer gency Tensioning
Device may also depl oyintheev ent of an
accident along with other sy stems.
00BBOnly one person should use each seat
belt at any one time.
Re leasing seat belts
00BBPress there lease button in the seat belt
buckle and guide the seat belt back with the
seat belt tongue.
Ac tivating or deactivating seat belt adjust‐
ment via the multimedia sy stem
Multimedia sy stem:
00869HKLFOH00CFî 9HKLFOH 6HWWLQJV00CF%HOW
$GMXVWPHQW
00BBAc tivate 0073or deacti vate 0053 the function.
Seat belt warning function for the driver and
front passen ger
The 00E9 seat belt warning lamp in the Instru‐
ment Display is a reminder that all vehicle occu‐
pants must weartheir seat belts cor rectly.
The 00E9 seat belt warning lamp lights up for six
seconds af tereve ryengine start.
In addition, an acoustic warning tone may sound.
When the driver's and front passenger doors are
closed and the driver and front passenger ha ve
fast ened their seat belts, the seat belt warning
goes out. During a journe
y,the seat belt warning lights up
if:
RThe vehicle speed exceeds 15mp h
(25 km/h) and the driver's or front
passenger seat belt is not fastened.
RThe driver or front passenger unfas tens their
seat belt while theve hicle is in motion.
Airbags
Overview of air bags
1Driver's knee bag
2Driver's air bag
38
Occupant saf ety