2017 MERCEDES-BENZ C-Class COUPE sensor

ABS (Anti-lock Braking System)
Gene ralinform ation
ABSregulates brak epressur einsuchaw ay that
th ew heels do no tloc kw hen you brake. This
allows you to continu esteering th evehicl ewhen
braking .
The ! ABSw arning lamp in th einstrumen t
cluste rlights up when th eignition is switched
on .Itg oeso ut when th eengineisr unning.
AB Sw orks from aspee dofa bout5mph
(8 km/h), regardless of road-surface conditions.
AB Sw orks on slipper ysurfaces, eve nwhen you
only brak egently.
Import ant safety notes
iObservethe "Importan tsafet ynotes "sec-
tion (Ypage 61).
GWARNIN G
If AB Sisf aulty, th ewheels could loc kwhen
braking .The steerabilit yand braking charac -
teristics may be severely impaired. Addition -
ally, further drivin gsafet ysystems are deac -
tivated. There is an increased danger of skid-
din gand accidents .
Drive on carefully. Hav eABS checke dimme-
diately at aqualified specialis tworkshop .
When AB Sismalfunctioning ,other systems ,
includin gdrivin gsafet ysystems ,will also
become inoperative. Observ ethe information
on th eABS warning lamp (
Ypage 249) and dis-
play message swhichm ay be shown in th e
instrumen tcluste r(
Ypage 220).
Braking
XIf ABS intervenes: continuetodepress th e
brak epedal vigorously until th ebraking sit -
uation is over.
XTo make afullb rake application: depress
th eb rak epedal wit hfull force .
If AB Sintervenes when braking ,you will fee la
pulsing in th ebrak epedal .
The pulsating brak epedal can be an indication
of hazardous road conditions, and function sasa
reminder to tak eextra carew hile driving.
BAS (Brak eAssistS ystem)
Gene ralinform ation
BASo perate sinemergenc ybraking situations.
If you depress th ebrak epedal quickly, BA S
automatically boosts th ebraking force ,thu s
shortening th estopping distance.
Imp ortant safety notes
iObserv ethe "Importan tsafet ynotes "sec-
tion (Ypage 61) .
GWARNIN G
If BA Sism alfunctioning ,the braking distanc e
in an emergenc ybraking situation is
increased. There is ariskofana ccident.
In an emergenc ybraking situation ,depress
th eb rak epedal wit hfull force .ABS prevents
th ew heels from locking .
Braking
XKeepthe brak epedal firmly depressed until
th ee mergenc ybraking situation is over.
AB Sp revents th ewheels from locking .
The brakes will function as usual once you
release th ebrak epedal .BAS is deactivated.
BAS PLUS (Brak eAssistS ystem
PLUS)w ith Cross-Traffic Assist
Gene ralinform ation
BASP LUSc an help you to minimiz ethe riskofa
collision wit havehicleorap edestrian and
reduce th eeffects of suc hacollision .IfBAS
PLU Sdetects adanger of collision ,you are
assisted when braking .
iPay attention to theimportant safet ynotes
in th e"Drivin gsafet ysystems "section
(
Ypage 61) .
BA SP LUSiso nlya vailable on vehicles wit hthe
Drivin gAssistance package.
Fo rB AS PLU Stoa ssist you when driving, th e
radar sensor system and th ecamera system
mus tbeo perational.
62Driving safety systems
Safety

With the help ofasensor system and acamera
system, BAS PLUS can detect obstacles:
Rthat are in the path of your vehicle for an
extended period of time
Rthat cross the path of your vehicle
In addition, pedestrians in the path of your vehi-
cle can be detected.
BAS PLUS detect spedestrians by using typical
characteristic ssuch as the body contours and
posture of aperson standin gupright.
If the radar sensor system or the camera system is malfunctioning, BAS PLUS functions are
restricted or no longer available. The brake sys-
tem is still available with completeb rake boost-
ing effect and BAS.
iObserve the restriction sdescribed in the
"Important safety notes" sec-
tion“ (
Ypage 63).
Important safety notes
GWARNING
BAS PLUS cannot alwaysc learly identify
object sand complex traffic situations.
In such cases, BAS PLUS may:
Rintervene unnecessarily
Rnot intervene
There is arisk of an accident.
Always pay careful attention to the traffic sit- uation and be ready to brake. Terminat ethe
intervention in anon-critical driving situation.
GWARNING
BAS PLUS cannot alwaysc learly identifypeo-
ple, this is especially the case if they are mov-
ing. BAS PLUS cannot intervene in these
cases. There is arisk of an accident.
Always pay careful attention to the traffic sit-
uation and be ready to brake.
GWARNING
BAS PLUS does not react:
Rto small people, e.g. children
Rto animals
Rto oncoming vehicles
Rwhen cornering
As aresult, BAS PLUS may not intervene in all
critical situations. There is arisk of an acci-
dent.
Always pay careful attention to the traffic sit-
uation and be ready to brake.
In the event of snowfall or heavy rain, the rec-
ognition can be impaired.
Recognition by the radar sensor system is also
impaired if:
Rthere is dirt on the sensor soranything else
coveringt he sensors
Rthere is interference by other radar sources
Rthere are stron gradar reflections, for exam-
ple in parking garages
Ran arrow vehicle is travelin ginfront, e.g. a
motorbike
Rav ehicle is travelin ginfrontonad ifferentline
Rvehicles quickly move into the radar sensor
system detection range
Recognition by the camera system is also
impaired in the event of:
Rdirt on the camera or if the camera is covered
Rglare on the camera system, e.g. from the sun being low in the sky
Rdarkness
Ror if:
-pedestrians move quickly, e.g. into the path
of the vehicle
-the camera system no longer recognizes a
pedestrian as aperson due to special cloth-
ing or other objects
-ap edestrian is concealed by other objects
-the typical outline of aperson is not distin-
guishable from the background
Following damage to the fronte nd of the vehicle,
have the configuration and operation of the
radar sensor schecked at aqualified specialist
workshop. This also applies to collisions at slow
speeds where there is no visible damage to the
frontoft he vehicle.
Following damage to the windshield, have the
configuration and operation of the camera sys-
tem checked at aqualified specialist workshop.
Driving safety systems63
Safety
Z

Function
To avoidacollision ,BAS PLU Scalculates th e
brak eforce necessar yif:
Ryou approac hanobstacle ,and
RBA SP LUSh as detected ariskofc ollision
When drivin gatas peed under 20 mp h
(30 km/h ):ifyou depress th ebrak epedal, BA S
PLU Sisa ctivated. The increas einbrakepres-
sure will be carried out at th elast possible
moment.
When drivin gatas peed abov e20mph
(30 km/h) :ifyou depress th ebrak epedal
sharply, BA SPLUSa utomatically raises th e
brak epressur etoav alue adapted to th etraffic
situation .
BA SP LUSp rovide sbraking assistanc einhaz-
ardous situation swithv ehicles in fron twithin a
spee drange between 4mph (7 km/h) and
15 5m ph (25 0km/ h).
At speeds of up to approximately 44 mph
(70 km/h), BA SPLUSc an reac tto:
Rstationary object sinthepat hofy our vehicle,
e.g. stoppe dorparked vehicles
Rpedestrian sinthepat hofy our vehicl e
Robstacles crossing your path, whic hmovei n
th ed etection range of th esensor sand are
recognize dbythem
iIf BA SPLUSd emand sparticularly high brak -
ing force, preventative passenger protection
measures (PRE-SAF E
®)are activated simulta-
neously (Ypage 55).
XKeepthe brak epedal depressed until th e
emergenc ybraking situation is over.
AB Sp reve
nts th
ewheels from locking.
BA SP LUSisd eactivated and th ebrakes func-
tion as usual again ,if:
Ryou release th ebrak epedal.
Rthere is no longer ariskofc ollision .
Rno obstacle is detected in fron tofyour vehi-
cle .
Ryou depress th eaccelerato rpedal
Ryou activat ekickdown .
COLLISIONP REVENTIO NASSIST
PLUS
General information
iObserv ethe "Importan tsafet ynotes "sec-
tion (Ypage 61).
COLLISION PREVENTION ASSIST PLU Sconsists
of ad istanc ewarning function wit hanautono-
mous braking function and adaptive Brake
Assist .
COLLISION PREVENTION ASSIST PLU Scan help
you to minimiz ethe riskofaf ront-end collision
wit hav ehicleahead or reduce th eeffect sof
suc hac ollision .
If COLLISION PREVENTION ASSIST PLU S
detect stha tthe re is ariskofac ollision ,you will
be warned visually and acoustically. If you do no t
reac ttot hevisual and audible collision warning ,
autonomous braking can be initiate dincritical
situations. If you apply th ebrak eyourself in a
critical situation ,the COLLISION PREVENTION
ASSIST PLU Sadaptive Brake Assist assist syou.
Important safety notes
In particular, th edetection of obstacles can be
impaired if:
Rthere is dirt on th esensor soranythin gelse
covering th esensor s
Rthere is snow or heav yrain
Rthere is interferenc ebyother radar sources
Rthere are stron gradar reflections, for exam-
ple in parking garages
Ran arrow vehicl etraveling in front, e.g. a
motorbike
Rav ehicl etraveling in fron tonadifferent lin e
Rnewv ehicles or after aservic eont heCOLLI-
SION PREVENTION ASSIST PLU Ssystem
Observ ethe important safet ynotes in the
"Breaking-in notes" section (
Ypage 130).
Followin gdamag etothefron tend of th evehicle,
have th econfig uration and operation of th e
radar sensor checked at aqualified specialist
workshop. This also applie stocollision satslow
speeds wher ethere is no visible damag etothe
fron toft hevehicle.
64Driving safety systems
Safety

Activating/deactivating
The COLLISION PREVENTION ASSIST PLUSis
automatically active after switching on th eigni-
tion .
You can activat eordeactivat eCOLLISION PRE -
VENTION ASSIST PLU Sintheon-board com-
puter (
Ypage 212). When deactivated, th edis-
tance warning function and th eautonomous
braking function are also deactivated.
If COLLISION PREVENTION ASSIST PLU Sis
deactivated, th eæ symbol appear sinthe
assistanc egraphic sdisplay.
Distance warning function
Genera linformation
The distanc ewarning function can help you to
minimiz ethe riskofaf ront-end collision wit ha
vehicl eahead or reduce th eeffects of suc ha
collision .Ifthedistanc ewarning function
detects that there is ariskofac ollision ,you will
be warned visually and acoustically.
Important safety notes
iObserv ethe "Importan tsafet ynotes "sec-
tion for drivin gsafet ysystems (Ypage 61).
GWARNIN G
The distanc ewarning function does no treact:
Rto people or animals
Rto oncomin gvehicles
Rto crossing traffic
Rwhen cornering
Thus ,the distanc ewarning function canno t
provid eawarning in all critical situations.
There is ariskofana ccident.
Always pay careful attention to th etraffic sit -
uation and be read ytob rake.
GWARNIN G
The distanc ewarning function canno talways
clearly identify objects and complex traffic
situations.
In suc hcases, th edistanc ewarning function
may:
Rgiv eanu nnecessary warning
Rnotg iveaw arning
There is ariskofana ccident.
Always pay careful attention to th etraffic sit -
uation and do no trelys olely on th edistanc e
warning function .
Function
Starting ataspee dofa pproximately 4mph
(7 km/h), th edistanc ewarning function warn s
you if you rapidly approac havehicl einfront.An
intermittent warning tone will then sound, and
th e· distanc ewarning lamp will ligh tupin
th ei nstrumen tcluster.
XBrake immediately in order to increas ethe
distanc efromt hevehicl einfront.
or
XTak eevasive action ,provided it is saf etodo
so.
Due to th enature of th esystem, particularly
complicated but non-critical drivin gconditi ons
may also caus ethe system to display awarning .
Wit hthe help of th eradar sensor system, th e
distanc ewarning function can detec tobstacles
that are in th epathofy our vehicl efor an exten-
ded period of time.
Up to aspee dofa pproximately 44 mph
(70 km/h), th edistanc ewarning function can
also reac ttostationary obstacles, suc hasstop-
ped or parked vehicles.
Aut onom ous braking function
If thedriver does no treac ttot hedistanc ewarn-
ing signal in acritical situation ,COLLISION PRE -
VENTION ASSIST PLU Scan assist wit hthe
autonomous braking function .
The autonomous braking function :
Rgives thedriver mor etimetor eacttoc ritical
drivin gsituation s
Rcan help th edriver to avoi danacciden tor
Rreduce sthe effects of an acciden t
Vehicles withou tDISTRONIC PLUS :th e
autonomous braking function is available in th e
followin gspee dranges :
R4-65m ph (7-105 km/h) for moving objects
R4-31m ph (7-50km/h) for stationary
objects
Driving safety systems65
Safety
Z

Vehicles with DISTRONICPLUS:the autono-
mou sbraking function is available in the follow-
ing speed ranges:
R4-1 24 mph (7 -200 km/h )for moving
objects
R4-31m ph (7-50km/h)for stationary
objects
Due to the nature of the system, particularly
complicate dbutnon-critica ldriving conditions
may also cause the Autonomous Braking Func-
tion to intervene.
If the autonomous braking function requires a
particularly hig hbraking force ,preventative
passenger protectio nmeasures (PRE-SAFE
®)
are activate dsimultaneously (Ypage 55).
Adaptive Brake Assist
General information
iObserve the "Important safety notes "sec-
tion (Ypage 61).
With the hel pofadaptive Brake Assist, the dis-
tance warning signal can detect obstacles that
are in the path of your vehicl efor an extended
perio doft ime.
If adaptive Brake Assist detects ariskofc olli-
sio nw itht he vehicl einfront, it calculate sthe
braking force necessary to avoid acollision. If
yo ua pply the brakes forcefully ,adapt ive Brake
Assist will automaticall yincreas ethe braking
force to alev el suitabl efor the traffic conditions.
Adaptive Brake Assist provides braking assis-
tance in hazardouss ituations at speeds above
4m ph (7 km/h). It uses radar sensor technology
to asses sthe traffic situation.
Up to aspeed of approximately 155 mph
(250 km/h), adaptive Brake Assist is capable of
reacting to moving objects that have already
bee ndetected as such at leas tonce ove rthe
perio dofo bservation.
Up to aspeed of approximately 44 mph
(70 km/h),a daptive Brake Assist reacts to sta-
tionary obstacles.
If adaptive Brake Assist demand sparticularly
hig hb raking force ,preventative passenger pro-
tectio nmeasures (PRE-SAFE
®)are activated
simultaneously (Ypage 55).
XKee pthe brake pedal depressed unti lthe
emergency braking situation is over.
ABS prevents the wheel sfrom locking. The brakes wi
ll w
ork normall
yagain if:
Ryour elease the brake pedal.
Rthere is no longer any danger of acollision.
Rno obstacl eisdetected in front of your vehi-
cle.
Adaptive Brake Assist is then deactivated.
Important safety notes
iObserve the "Important safety notes "sec-
tion for driving safety systems (Ypage 61).
GWARNING
Adaptive Brake Assist canno talway sclearly
identif yobjects and comple xtraffic situa-
tions.
In such cases, Adaptive Brake Assist can:
Rintervene unnecessarily
Rnot intervene
There is ariskofana ccident.
Alway spaycareful attention to the traffic sit-
uation and be ready to brake. Terminate the
intervention in anon-critica ldriving situation.
GWARNING
Adaptive Brake Assist doe snot react:
Rto peopl eoranimals
Rto oncoming vehicles
Rto crossing traffic
Rwhen cornering
As aresult, the Adaptive Brake Assist may not
intervene in al lcritical conditions .There is a
ris kofana ccident.
Alway spaycareful attention to the traffic sit-
uation and be ready to brake.
Due to the nature of the system, particularly
complicate dbutnon-critica ldriving conditions
may also cause Brake Assist to intervene.
If adaptive Brake Assist is not available du etoa
malfunction in the radar sensor system, the
brake system remains available with ful lbrake
boosting effect and BAS.
66Driving safety systems
Safety

acollision unless you brak eyourself. Even
after subsequentf ull applicationofthebrakes
ac ollision canno talways be avoided, partic-
ularly when approaching at to ohigh aspeed.
Thereisar isk of an accident.
Always apply th ebrakes yourself and tr yto
tak eevasive action,p rovided it is safe to do
so.
In th eeven tofap artial applicatio nofthebrakes,
th ev ehicle is braked with up to 50 %ofthefull
braking pressure.
GWARNING
PRE-SAFE
®Brake canno talways clearly iden-
tif yo bject sand complex traffic conditions.
In these cases, PRE-SAFE
®Brake may:
Rgive an unnecessaryw arning and then
brak ethe vehicle
Rnotg ive awarning or intervene
Thereisar isk of an accident.
Always pay particular attention to th etraffic
situatio nand be ready to brake, especially if
PRE-SAFE
®Brake warn syou. Terminate the
intervention in anon-cri tical driving situation.
GWARNING
PRE-SAFE
®Brake canno talways clearly iden-
tif yp eople, especially if they are moving .In
these cases, PRE-SAFE
®Brake canno tinter-
vene. Thereisar isk of an accident.
Always pay particular attention to th etraffic
situatio nand be ready to brake, especially if
PRE-SAFE
®Brake warn syou.
In orde rtomaintain th eappropriat edistanc eto
th ev ehicle in fronta nd thus prevent acollision,
you must apply th ebrakes yourself.
GWARNING
PRE-SAFE
®Brake does no treact:
Rto small people, e.g .children
Rto animals
Rto oncoming vehicles
Rto crossing traffic
Rwhen cornering
As aresult, PRE-SAFE®Brake may neither
give warning snorintervene in all critical sit-
uations .Thereisar isk of an accident.
Always pay careful attention to th etraffic sit-
uatio nand be ready to brake.
In th eeven tofs nowfall or heavyr ain,the rec-
ognition can be impaired.
Recognition by th eradar sensor system is also
impaired if:
Rthere is dirt on th esensorsora nythingelse
coveringt hesensors
Rthere is interference by other radar sources
Rthere are stron gradar reflections ,for exam-
ple in parking garages
Ran arrow vehicle is travelin ginfront,e.g.a
motorbike
Rav ehicle is travelin ginfrontonadifferentl ine
relative to th ecente rofy our vehicle
Recognition by th ecamera system is also
impaired in th eeven tof:
Rdirt on th ecamera or if th ecamera is covered
Rglare on th ecamera system, e.g .fro mt hesun
beingl ow in th esky
Rdarkness
Ror if:
-pedestrians moveq uickly, e.g.int ot he path
of th evehicle
-thec amera system no longer recognize sa
pedestrian as aperson due to special cloth-
ing or other objects
-ap edestrian is concealed by other objects
-thet ypical outline of aperson is no tdistin-
guishable from th ebackground
Followingd amage to th efront end of th evehicle,
have th econfiguratio nand operatio nofthe
r

adar sensorsc hecked at aqualified specialist
workshop.T his also applies to collisionsats low
speeds wheret here is no visible damage to the
frontoft hevehicle.
Followingd amage to th ewindshield, have the
configuratio nand operatio nofthecamera sys-
te mc hecked at aqualified specialist workshop.
Driving safety systems71
Safety
Z

You will receive visual and acoustic locking con-
firmation if all components were able to be
locked.
When the locator lighting is activatedvia the
multimedia system, it lightsupw hen it is dark
afte rthe vehicle is unlocked with the SmartKey
(see the Digital Operator's Manual).
XTo open th etrunk lid automaticall yfrom
outside th evehicle: press and hold the F
button until the trunk lid opens.
XTo open th etrunk lid automaticall yfrom
outside th evehicle: if the SmartKey is loca-
ted in the immediatev icinity of the vehicle,
press the Fbutton on the SmartKey.
When the trunk lid close syou can then
release the button.
KEYLESS-GO
Genera lnotes
Bear in mind that the engin ecan be started by
any of the vehicle occupant sifthere is aSmart-
Key in the vehicle (
Ypage 133).
Locking/unlocking centrally
You can start, lock or unloc kthe vehicle using
KEYLESS-GO. To do this ,you only need carr ythe
SmartKey with you. You can combine the func-
tion sofK EYLESS-GO with those of aconven-
tional SmartKey. Unlock the vehicle by using
KEYLESS-GO, for instance, and lock it using the
& button on the SmartKey.
The driver's door and the door at which the han-
dle is used, must both be closed. The SmartKey
must be outsid ethe vehicle. When locking or
unlockin gwith KEYLESS-GO, the distance
betwee nthe SmartKey and the corresponding
door handle must not be greater than 3ft(1m ).
Ab rief radio connection betwee nthe vehicle
and the SmartKey determine swhether avalid
SmartKey is in, or in the directv icinity of, the
vehicle. This occurs, for example:
Rwhen startin gthe engine
Rwhile driving
Rwhen using HANDS-FREE ACCESS
Rwhen the external door handles are touched
Rduring convenienc eclosing
XTo unlock th evehicle: touchthe inner sur-
face of the door handle.
XTo lock th evehicle: touchsensor surface :
or ;.
Make sure that you do not touc hthe inner
surfaceoft he door handle.
XConvenience closing feature: touch
recessed sensor surface ;for an extended
period.
Further information on the convenienc eclos-
ing feature (
Ypage 88).
Deactivating and activating
If you do not intend to use aSmartKey for an
extended period of time, you can deactivate the
KEYLESS-GO function of the SmartKey. The
SmartKey will the nuse very little power, thereby
conserving battery power. For the purposes of
activation/deactivation, the vehicle must not be
nearby.
XTo deactivate: press the&button on the
SmartKey twic einrapid succession.
The battery chec klamp (
Ypage 77) of the
SmartKey flashes twic ebriefly and lightsu p
once, the nKEYLESS-GO is deactivated.
XTo activate: press any button on the Smart-
Key.
or
XInsert the SmartKey int othe ignition lock.
KEYLESS-GO and all of its associated features
are available again.
SmartKey75
Opening and closing
Z

KEYLESS-GOstartfun ction
Gene raln otes
Bear in min dthatthe engin ecan be started by
any of th evehicl eoccupant sifthere is aSmart-
Key in th evehicl e(
Ypage 133).
Changing th esettings ofthel ocki ng
system
You can chang ethe setting softhelocking sys-
tem. This mean sthato nlyt he driver's door and
th ef uel filler flap are unlocke dwhen th evehicl e
is unlocked. This is useful if you frequentl ytravel
alone.
XTo change th esetting: press and hold down
th e% and& buttons simultaneousl y
for approximately six seconds until th ebat-
tery chec klamp (
Ypage 77) flashes twice .
If th esetting of th elocking system is changed
within th esignal range of th evehicle, pressing
th e& or% button:
Rlocks or
Runlocks th evehicl e
The SmartKey no wfunction sasfollows :
XTo unlock: press the% buttononce.
XTo unlock centrally: press the% button
twice .
XTo lock: press the& button.
The KEYLESS-GO function scan be changed as
follows :
XTo unlock th edriver's door :touch th einner
surfac eofthedoor handle on th edriver's
door .
XTo unlock centrally: touch theinner surfac e
of th efront-pa ssenger door handle.
XTo lock centrally: touch theouter sensor
surfac eono neof th edoor handles .
XTo restorethe factory settings: press and
hold th e% and& buttons simultane -
ousl yfor approximately six seconds until th e
bat tery che
c klamp (Ypage 77) flashes
twice .
Mechanical key
Gene raln otes
If th evehicl ecan no longer be locke dor
unlocke dwitht he SmartKey or KEYLESS-GO ,
use th emechanical key.
If you use th emechanical ke ytou nloc kand
open th edriver's door ,the anti-thef talarm sys-
te mw ill be triggered .Switc hoff th ealarm
(
Ypage 73) .
If you unloc kthe vehicl eusingthe mechanical
key, th efuel filler flap will no tbeunlocke dauto -
matically.
XTo unlock th efuelfiller flap: insert the
SmartKey int othe ignition lock.
Removing th emechanicalk ey
XPush release catch :in th edirection of th e
arrow and at th esam etimer emove mechan -
ical ke y; from th eSmartKey.
Further information :
RUnlocking thedriver's door (Ypage 82)
RLocking th evehicl e(Ypage 82 )
Inserting th emechanicalk ey
XPush mechanical ke y; completely int othe
SmartKey until it engage sand release
catch :is bac kinitsbasic position .
76SmartKey
Opening and closing