brake sensor MERCEDES-BENZ E-CLASS CABRIOLET 2018 Owner's Manual

0075NO
TEImpairment of the operating ef fi‐
ciency of there stra int sy stems from
ins talling accessories or from repairs or
we lding
Airbags, Emer gency Tensioning Devices, as
we ll as control units and sensors forth e
re stra int sy stems, may be ins talled in thefo l‐
lowing areas of your vehicle:
RDoors
RDoor pillars
RDoor sills
RSeats
RCo ckpit
RInstrument clus ter
RCente r console
00BBDo not ins tall accessories such as audio
sy stems in these areas.
00BBDo not car ryout repairs or welding.
00BBHave accessori esretrofitted at a quali‐
fi ed specialist workshop.
Yo u could jeopardize the operating saf etyof your
ve hicle if you use parts, tires and wheels as well
as accessories releva nt tosaf etywhic hha ve not
been appr ovedby Mercedes-Benz. Saf ety-re le‐
va nt sy stems, e.g. the brake sy stem, may mal‐
function. Only use Mercedes-Benz GenuineParts
or parts of equal quality. Only use tires, wheels
and accessory parts that ha vebeen specifically
appr ovedfo ryo ur vehicle model.
Mercedes-Benz GenuineParts are subject to
st rict quality control. Each part has been spe‐
cially de veloped, manufactured or selecte dfo r
Mercedes-Benz vehicles and fine-tuned forth em.
Therefore, only Mercedes-Benz GenuineParts
should be used.
More than 300,000 dif fere nt Mercedes-Benz
GenuineParts are available for Mercedes-Benz
models.
All au thorized Mercedes-Benz Centers maintain
a supply of Mercedes-Benz GenuineParts for
necessary service and repair work. In addition,
st ra tegically located parts-delivery centers pro‐
vide forqu ick and reliable parts service. Alw
ays specify theve hicle identification number
(VIN) (→page 385) when ordering Mercedes-
Benz GenuineParts.
Operator's Manual
This Operator's Manual describes all models and
all standard and optional equipment available for
yo ur vehicle at the time of this Opera tor's Man‐
ual going topress. Countr y-specific dif fere nces
are possible. No tethat your vehicle may not be
equipped with all features descri bed. This also
applies tosaf ety-re leva nt sy stems and functions.
Therefore, the equipment on your vehicle may
dif fer from that in the descriptions and illustra‐
tions.
The original pur chase contract documentation
fo ryo ur vehicle contains a list of all of the sys‐
te ms in your vehicle.
Should you ha veany questions concerning
equipment and operation, please consult an
authorized Mercedes-Benz Center.
The Operator's Manual and Maintenance Booklet
are impor tant documents and should be kept in
th eve hicle.
20
General no tes

eral acceleration, display ofthefast 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. air bag 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 theeve nt or malfunction memor y.
When your vehicle is serviced, tech nical da ta
from theve hicle can be read out byservice net‐
wo rkemplo yees or third parties. Services
include repair services, maintenance processes,
wa rranty events and quality assurance meas‐
ures, forex ample. The read out is per form ed via
th e legally prescribed port for OBD ("on-board diagnostics") in
theve hicle. The respective
service network locations or third parties col‐
lect, process and use the data. They document
te ch nical statuses of theve hicle, assist in find‐
ing malfunctions and impr oving quality and are
transmitted tothe manufacturer, if necessar y.
Fu rther more,
the manufact
urer is subjectto
product liability. Forth is, the manufacturer
requ irestech 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 con veni‐
ence and inf otainment functions themselves as
part of the selected equipment.
This includes, forex ample:
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
stored locally in theve hicle or
is located on a device which you ha veconnected
to theve hicle. If this data is stored in theve hi‐
cle, you can 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 to your 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
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 transmitte dto yo ur
smartphone.
General no tes 27

Running-in no tes
To preser vethe engine during thefirs t
1, 000 miles (1,500 km):
Rdrive at varying road speeds and engine
speeds.
Rdrive in drive program Cor E.
Rchange gear before there v counter needle is
00C3 ofthewa yto there d area of there v coun‐
te r.
Rdo not shift down a gear manually in order to
brake.
Rav oid overstraining theve hicle, e.g. driving at
full thro ttle.
Rdo not depress the accelerator pedal past
th e pressure point (kickdown).
Ronly increase the engine speed gradually and
accelerate theve hicle tofull speed af ter
1, 000 miles (1,500 km).
This also applies when the engine or parts of the
driv etra in ha vebeen replaced. Please also obser
vethefo llowing running-in
no tes:
RIn cer tain driving and driving saf etysy stems,
th e sensors adjust automatically while a cer‐
ta in dis tance is driven af terth eve hicle has
been delivered or af terre pairs. Full sy stem
ef fectiveness is not achie ved until the end of
th is teach-in process.
RBrake pads, brake discs and tires that are
either new or ha vebeen replaced only ach‐
ie ve optimum braking ef fect and grip af ter
se veral hundred kilom eters of driving. Com‐
pensate forth ere duced braking ef fect by
applying greater fo
rc eto the brake pedal.
Note s on driving
0071
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 tra vel or block a depressed pedal.
This jeopardizes the operating and road
saf etyof theve hicle.
00BBStow all objects in theve hicle securely
so that they cannot getinto the driver's
fo ot we ll.
00BBAlw 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.
00BBDo not use loose floor mats and do not
place floor mats on top of one ano ther.
0071
WARNING Risk of accident due to
unsuit ablefoot we ar
Operation of the pedals may be restricted
due tounsuit ablefoot we ar such as:
RShoes with platfo rmsoles
RShoes with high heels
RSlippers
00BBWhen driving alw ayswe ar suitable
shoes in order tobe able tooperate the
pedals safel y.
134
Driving and pa rking

0071WARNING Risk of an accident despite
Evasive Steering Assist
Evasive Steering Assist cannot always clearly
identify objects and complex traf fic situa‐
tions.
In addition, thesteering support of Evasive
St eering Assist is general lynot suff icientto
avo id a collision.
In such cases Evasive Steering Assist can:
Rgive an unnecessary warning or pr ovide
assis tance
Rnot give awa rning or not pr ovide assis‐
ta nce
00BBAlw ays pay careful attention tothe traf‐
fi c situation; do not rely on Ev asive
St eering Assist alone.
00BBBe ready tobrake and take evasive
action if necessar y.
00BBPreve ntthe assis tance byactively steer‐
ing in non-critical driving situations.
00BBDrive at an appropriate speed if pedes‐
trians are close tothe path of your vehi‐
cle.
Also obser vethe sy stem limitations of Evasive
St eering Assist.
Sy stem limitations
The sy stem may be impaired or may not function
in thefo llowing situations:
RIn sno w,rain, fog, heavy spr ay, if there is
gl are, in direct sunlight or in greatlyvarying
light conditions.
RIf th e sensors are dirty, mis ted up, damaged
or co vered.
RIfth e sensors malfunction due to otherradar
source inter fere nce, forex ample stro ng radar
re flections in parking garage s.
RIf a loss of tire pressure or a defective tire
has been de tected and displ ayed.
The sy stem may not react cor rectly:
RIn complex traffic situations whe reobjects
cannot always be clearly identified.
RTo pedestrians or vehicles if they mo ve
qu ickly into the sensor de tection range.
RTo pedestrians who are hidden by other
objects.
RIf th e typical outline of a pedestrian cannot
be distinguished from the bac kground.
RIf a pedestrian isnot recognized as such , e.g.
due tospecial clo thing or other objects.
ROn bends with a tight radius.
Setting Active Brake Assi st
Multimedia system:
00869HKLFOH00CFk $VVLVWDQFH00CF$FWLYH
%UDNH $VVLVW
Ve hicles without Driving Assistance pack‐
age: The settings can be made af terst arting the
ve hicle.
Ve hicles with Driving Assistance pac kage:
The settings can be made when the ignition is
switched on.
00CE It is recommended that you alw ays lea ve
Ac tive Brake Assi stactivated.
Driving and parking 15
9

RActive Dis tance Assist DISTRONIC is acti va‐
te d.
RIfth e driving speed is higher than 45 mph
(70 km/h).
RIf th e driven speed drops below thestored
speed.
RThe sy stem cannot detect a vehicle in there l‐
ev ant area of theove rtaking lane.
Ve hicles with Driving Assistance Package
and Traf fic Sign Assis t:Ac tive Dis tance Assist
DISTRONIC also has theAc tive Speed Limit
Assi stfunction. This function can be configure d
in the multimedia sy stem. If a change in the
speed limit is de tected and Active Dis tance
Assist DISTRONIC is acti vated, Ac tive Dis tance
Assist DISTRONIC assumes this new speed.
The driven speed is adap ted when theve hicle is
le ve l with the tra ffic signs. The speed limit dis‐
play in the Instrument Display is alw ays update d
when theve hicle is le vel with the tra ffic sign.
If Ac tive Dis tance Assist DISTRONIC has been
put into passive modebypressing the accelera‐ to
r pedal, only speed limits which are higher
th an the set speed are adop ted.
Pulling the cruise control le ver will set the dis‐
pla yed speed limit as the speed, pr ovided that:
RAc tive Speed Limit Assi sthas been activated
in the multimedia sy stem and
RAc tive Dis tance Assist DISTRONIC has been
acti vated.
If no speed limit is displa yed when the le ver is
operated, the speed set bythe driver is adop ted.
Drive prog ram
The DYNA MIC SELECT switch allo wsyouto
ch ange the driving style of Active Dis tance
Assist DISTRONIC. Depending on which drive
prog ram is selected, the driving characteristics
can be geared towa rds fuel econom y,comfort or
dynamic per form ance (
→page 138).
Sy stem limitations
Ve hicles with the Driving Assistance Pack‐
age: Active Dis tance Assist DISTRONIC is acti ve
in the 0 mph(0 km/h) to130mp h(210 km/h)
speed range. The sy
stem may be impaired or may not function
in thefo llowing ins tances, forex ample:
RIn snow ,ra in, fog, heavy spr ay, if there is
gl are, in direct sunlight or in greatlyvarying
light conditions.
RThe windshield in the area of the camera is
dirty, mis ted up, damaged or co vered.
RIfth era dar sensors are dirty or co vered.
ROn slippery roads, braking or accelerating
can cause the drive wheels tolose traction
and theve hicle could then skid.
RIn parking garage s,tollst ations or on roads
with steep uphill or downhill gradients.
Do not use Active Dis tance Assist DISTRONIC in
th ese situations.
Tips
Pa yparticu
la rattention in thefo llowing traf fic
situations. In such situations, brake if necessar y.
Ac tive Dis tance Assist DISTRONIC is then deacti‐
va ted:
RWhen cornering, entering and exiting a bend.
RWhen not driving in the center of the lane.
Driving and parking 16
3

Function of Cross Traf fic Alert
00CE Also read the instructions on Blind Spot
Assist (
→page 193).
Ve hicles with Blind Spot Assis t:Dr ivers can
also be warned of any crossing traf fic when
back ing out of a parking space. If a critical situa‐
tion is de tected, a warning symbol appears on
th e camera image of the multimedia sy stem. If
th e driver does not respond tothewa rning, the
ve hicle's brakes can be applied automaticall y.To
do this, the function uses thera dar sensors in
th e bumper. The area adjacent totheve hicle is
continually monitored.
If th era dar sensors are obstructed byvehicles
or other objects, de tection is not possible.
The Cross Traf fic Alert function is acti veunder
th efo llowing conditions:
RIf Blind Spot Assist is activated.
RIf th eve hicle is backing up at walking pace.
RIfth e maneuvering assis tant function is acti‐
va ted in the multimedia sy stem.
The Cross Traf fic Alert function is not available
on inclines. Deactivating/activating
the maneuvering
assistant
Multimedia sy stem:
00869HKLFOH00CFk $VVLVWDQFH00CF&DPHUD
3DUNLQJ00CF0DQHXYHULQJ $VVLVW
00BBSwitch the function on 0073or off 0053.
ATTENTION ASSIST
Fu nction of ATTENTION ASSIST
AT TENTION ASSIST assists you on long, mon oto‐
nous journe ys, e.g. on free ways and trunk roads.
If AT TENTION ASSIST de tects indicators of fati‐
gue or increasing lapses in concentration on the
part of the driver, it suggests taking a brea k.
AT TENTION ASSIST is only an aid. It cann ot
alw ays de tect fatigue or lapses in concentration
until too late. The sy stem is not a substitute for a
we ll-res ted and attentive driver. On long jour‐
ne ys,tak ere gular breaks in good time that allow
fo r ade quate recuperation.
Yo u can choose between two settings.
RStandard: normal sy stem sensitivity
RSensitive: higher system sensitivity. The
driver is warned earlier and the attention
le ve l de tected byATTENTION ASSIST is adap‐
te d accordingly.
If dr owsiness or inc reasing lapses in concentra‐
tion are de tected, the$77(17,21 $66,67 7DNH
D %UHDN warning appears in the Instrument Dis‐
pla y.Yo u can ackn owledge the message and
ta ke a break where necessar y.Ifyo u do not take
a break and ATTENTION ASSIST continues to
de tect increasing lapses in concentration, you
will be warned again af ter a minimum of
15 minutes.
Driving and parking 18
9

Blind Spot AssistandActive Blind Spot
Assi st
Function of Blind Spot Assist and Active
Blind Spot Assi st
Blind Spot Assist uses two lateral,rear-facing
ra dar sensors tomonitor the area up to130ft
(40 m) behind your vehicle and 10ft(3 m)
directly next to yourvehicle.
If a vehicle is de tected at speeds ab ove appr ox‐
imately 8 mph (12 km/h) and this vehicle subse‐
qu ent lyenters the monitoring range di rectly next
to yo urvehicle, thewa rning lamp in the outside
mir ror lights up red.
If a vehicle is de tected close to yourvehicle in
th e lateral monitoring range and youswit chon
th e turn signal indicator in the cor responding
direction, a warning tone sounds once. The red
wa rning lamp in the outside mir rorflashes. If the
turn signal indica torre mains on, all other de tec‐
te dve hicles are indicated only bytheflashing of
th ere dwa rning lamp.
If yo uove rtake a vehicle quickl y,no warning is
given.
0071 WARNING Risk of accident despite Blind
Spot Assist
Blind Spot Assist does notreact tovehicles
approaching and overtaking you at a greatly
di fferent speed.
As a result, Blind Spot Assist cannot warn
drivers in this situation.
00BBAlw ays pay careful attention tothe traf‐
fi c situation and maintain a safe dis‐
ta nce at the side of theve hicle.
Blind Spot Assist and Active Blind Spot Assi st
are only aids. They may failto detect some vehi‐
cles and are no substitute for attentive driving.
Alw ays ensure that there is suf ficient dist anceto
th e side forot her road users and obs tacles.
Sy stem limitations
The sy stem may be limited in thefo llowing situa‐
tions:
Rth e sensors are dirty or co vered
Rpoor visibility, e.g. due tofog, heavy rain,
snow or spr ay
Rnarrow vehicles, e.g. bicycles, are within the
monitoring range
Wa rnings may be issued in er ror when driving
close tocrash barr iers or similar solid lane bor‐
ders. Warnings may be inter rupte d when driving
alongside long vehicles, e.g. truc ks,fo r a pro‐
longed time.
Blind Spot Assist is not operational when reve rse
ge ar is engaged.
Fu nction of braking applications (Active
Blind Spot Assist)
If Ac tive Blind Spot Assi stdetects a risk of a side
impact in the monitoring range, a cours e-cor‐
re cting brake application is car ried out. This is
designed tohelp youav oid a collision.
The course-cor recting brake application is availa‐
ble in the speed range between appr oximately
20 mph (30 km/h) and 125mp h (200 km/h).
Driving and parking 19
3

RThe distance totheve hicle in front is too
small and the lane markings thus cannot be
de tected.
RThe lane markings change quickl y,e.g. lanes
branch off, cross one ano ther or mer ge.
RThe car riag ew ay isvery nar row and winding.
Ve hicles with Driving Assistance pac kage or
Driving Assistance Plus pa ckage: Active Lane
Ke eping Assist uses radar sensors tomonitor
se veral areas around theve hicle. If thera dar
sensors in there ar bumper are dirty or co vered
with snow ,th e sy stem may be impaired or may
not function. If an obs tacle in the lane in which
yo u are driving has been detected, no lane-cor‐
re cting brake application occurs .
Ac tivating Active Lane Keeping Assist
0071
WARNING Risk of accident despite
Ac tive Lane Keeping Assist warning
A lane-cor recting brake application cannot
al wa ys bring theve hicle back into the origi‐
nal lane.
00BBAlw aysst eer, brake or accelera teyour‐
self, especially if Active Lane Keeping
Assist warnsyo u or makes a lane-cor‐
re cting brake application.
0071
WARNING Risk of accident despite inter‐
ve ntion of Active Lane Keeping Assist
Ac tive Lane Keeping Assist does not de tect
traf fic conditions or road users. In very rare
cases, the sy stem may make an inappropri‐
ate brake application, e.g. af ter intentional ly
driving over a solid lane marking.
The brake application can be inter rupte d at
any time if yousteer slightly in the opposite
direction.
00BBAlw ays make sure that there is suf fi‐
cient dist ancetothe side forot her traf‐
fi c or obs tacles.
0071
WARNING Risk of accident despite Lane
Ke eping Assist
Lane Keeping Assist cannot always clearly
de tect lane markings.
In such cases, Lane Keeping Assist can:
Rgive an unnecessary warning
Rnot give a warning
00BBAlw ays pay particular attention tothe
traf fic situation and keep within the
lane, especially if Active Lane Keeping
Assist alerts you.
Re quirement
The driving speed is at least 40 mph (60 km/h).
Driving and parking 19
7

Observethefo llowing information:
Note s on cleaning and car eA voiding vehicle damage
Wheels/rims Usewate r and acid-free wheel cleaners.
RDo not use acidic wheel cleaners toremo vebrake dust.
This could damage wheel bolts and brake components.
RTo avoid cor rosion of the brake discs and brake pads,
drive theve hicle for a few minutes af ter cleaning before
parking it. The brake discs and brake pads warm up and
dry out.
Wi ndo ws
Cleanthe windo wsonthe inside and outside using a damp
clo thand cleaning agents recommended byMercedes-Benz. Do not use dry clo
ths or abrasive or sol vent-based cleaning
agents toclean the inside of windo ws.
Wi per blades
Fold out the wiper blades and clean them using a damp clo th.D o not clean the wiper blades too of ten.
Ex terior lighting
Cleanthe windo wswith a wet sponge and mild cleaning
agent, e.g. car sha mpoo. Only use cleaning agents or cleaning clo
thsth at are suitable
fo r plast ic covers.
Sensors Cleanthe sensors in the front and rear bumper and in the
ra diator grille with a soft clo thand car shampoo. When using a high-pressure cleaner, mainta
in a minimum dis‐
ta nce of 11.8 in (30 cm).
328
Maintenance and care

Observethefo llowing when selecting, ins talling
and replacing tires:
ROnly use tires and wheels of the same type
(summer tires, winter tires, MOEx tended
tires) and the same make.
ROnly ins tall wheels of the same size on one
axle (left and right).
It is only permissible toins tall a dif fere nt
wheel size in theeve nt of a flat tire in order
to drive tothe specialist workshop.
ROnly ins tall tires of the cor rect size onto the
wheels.
RVe hicles with a tire pressure monitoring
sy stem: all mounte d wheels must be equip‐
ped with functioning sensors forth e tire
pressure monitoring sy stem.
RAt temp eratures below 45 °F (7 °C), use win‐
te r tires or all-season tires mar ked M+S for
all wheels.
Wi nter tires bearing the004D snowflake sym‐
bol in addition tothe M+S marking pr ovide
th e best possible grip in wintry road condi‐
tions.
RFo r M+S tires, only use tires with the same
tread.
RObser vethe maximum permissible speed for
th e M+S tires ins talled.
If th is is below theve hicle's maximum speed,
th is must be indicated in an appropriate label
in the driver's field of vision.
RRu n in new tires at moderate speeds forth e
fi rs t 60 miles (100 km).
RRe place the tires af ter six years at the latest,
re ga rdless of wear.
RWhen replacing with tires that do not fea‐
ture run-flat characteristics: vehicles with
MOExtended tires are not equipped with a
TIREFIT kit at thefa ctor y.Equip theve hicle
with a TIREFIT kit af terre placing with tires
th at do not feature run-flat characteristics,
e.g. winter tires.
Fo r more information on wheels and tires, con‐
ta ct a qualified specialist workshop.
Be sure toalso observ eth efo llowing fur ther
re lated subjects:
RNo tes on tire pressure (→page 354)
RTire and Loading Info rmation placard
(→page 360)
RTi re size designation, load-beari ng capacity,
speed rating and load ind ex(→page 368)
RTire pressure table (→page 355)
Note s onrotating wheels
0071
WARNING Risk of injury thro ugh dif fer‐
ent wheel sizes
Inter changing the front and rear wheels if the
wheels or tires ha vediffere nt dimensions
may se verely impair the driving characteris‐
tics.
The wheel brakes or wheel suspension com‐
ponents may also be damaged.
00BBRo tate front and rear wheels only ifth e
wheels and tires are of the same dimen‐
sions.
Wheels and tires 37
5