2017 MERCEDES-BENZ C-Class COUPE sensor

Rthere areno, several or unclear lane markings
for alan e, e.g .inareas with roa dconstruction
work
Rthe lane markings ar eworna way, dark or cov-
ere dup,e.g .byd irtors now
Rthe distance to the vehicl einfront is too small
and the lane markings thusc annot be detec-
ted
Rthe lane markings change quickly, e.g .lan es
branch off ,cros sone anotherorm erge
Rthe roadisnarrow and winding
Rthere ar estrong shadows cas tonthe road
Activating/deactivating Lan eKeeping
Assist
XTo activate: press button ;.
Indicato rlam p: lights up .The Lan eKeep‐
ingAssistOnmessage appear sinthe mul-
tifunctio ndisplay .Ifallconditions have been
satisfied, there maybeaw arning.
If yo udrive at speeds above 40 mph
(60 km/h )and lane markings ar edetected,
the lines in the assistance graphics display
(
Ypage 211) ar eshown in green. Lane Keep-
ing Assist is ready for use.
XTo deactivate: press button;.
Indicato rlam p: goes out. Lane Keeping
Assist is deactivated .The Lan eKeeping
Assist Offmessage appear sinthe multi-
functio ndisplay .
Selecting Standard or Adaptiv esetting
XIn the DriveAssistmenu on the on-board
computer, select the LaneKeepingAssistfunction(Ypage 213).
XSelectStandardorAdaptive.
Standard
When Standard
is selected ,nowarning vibra-
tio no ccurs if:
Ryous witch on the tur nsignals .Int hise vent,
the warnings ar esuppr essedf orac ertain
perio doft ime.
Radrivin gsafety systemi ntervenes,suc ha s
ABS, BAS or ESP®.
Adaptive
When Adaptive
is selected ,nowarning vibra-
tio no ccurs if:
Ryous witch on the tur nsignals .Int hise vent,
the warnings ar esuppr essedf orac ertain
perio doft ime.
Radrivin gsafety systemi ntervenes,e.g.A BS,
BAS or ESP®.
Ryo ua ccelerate hard, e.g .kickdown.
Ryoub rake hard.
Ryous teer actively, e.g .swe rvetoa voidan
obstacle or change lanes quickly.
Ryo uc ut the corne ronasharp bend.
In order thaty ouarew arned onl ywhenn eces-
sary and in good tim eifyoucros sthe lane mark-
ing ,the systemr ecognizescertai nconditions
and warns yo uaccordingly.
The warning vibratio noccurs earlier if:
Ryoua pproach the outer lane marking on a
bend.
Rthe roa dhasver yw idel an es,e .g.ah ighway.
Rthe systemr ecognizessolid lane markings.
The warning vibratio noccurs later if:
Rthe roa dhasnarrow lanes.
Ryouc ut the corne ronabend.
Driving Assistance PLUS package
General notes
The Drivin gAssistance PLU Spackag econsists
of DISTRONI CPLUS(Ypage 162), Activ eBlind
Spo tAssist (Ypage 194 )and Active Lane Keep-
ing Assist (Ypage 197).
Active Blind SpotA ssist
General notes
Active Blind Spo tAssist uses aradar sensor
system ,pointe dtoward the rea rofthe vehicle,
to monitor the are atothe side softhe vehicle
which the driver is unabl etosee.Aw arning dis-
play in the exterio rmirrors draws your attention
to vehicles detectedint he monitoredarea. If
194Driving systems
Driving an dparking

you then switch on thecorre spondin gturns ig-
nal to chang elane, you will also receiv eanopti-
cal and audibl ewarning. If ariskofl ateral colli-
sion is detected, corrective brakin gmay help
you avoid acollision .Befor eac ourse-correcting
brak eapplication ,Activ eBlind Spot Assis teval -
uates th espac eint hedirection of travel and at
th es ide soft hevehicle. Fo rthis, Active Blind
Spot Assis tuses th eforward-facing rada rsen-
sors.
Active Blind Spot Assis tsupport syou from a
speed of approximately 20 mph (30 km/h).
Important safety notes
Active Blind Spot Assis tisonlyana id and is no t
as ubstitut efor attentive driving.
GWARNIN G
Active Blind Spot Assis tdoes no treac tto:
Rvehicles overtake ntoo closely on th eside ,
placin gthemint heblin dspota rea
Rvehicles whic happroac hwithal argespeed
differential and overtake your vehicl e
As aresult ,Activ eBlind Spot Assis tmay nei-
ther giv ewarnings no rintervene in suchsit-
uations. There is ariskofana ccident.
Always observ ethe traffic condition scare-
fully, and maintai nasafel ateral distance.
iUS Ao nly: This device has been approve dby
th eF CC as a"Vehicular Radar System". The
rada rsensor is intended for use in an auto-
motive rada rsystem only. Removal, tamper -
ing, or altering of th edevice will voi dany war-
ranties, and is no tpermitte dbytheFCC. Do
no ttamper with, alter, or use in any non-
approve dway.
An yu nauthorize dmodification to this device
could voi dthe user's authorit ytoo perate th e
equipment.
iCanada only: This device complies wit h
RSS-210 of Industry Canada. Operation is
subjec ttothefollowin gtwo conditions:
1. This device may no tcaus eharmful inter-
ference ,and
2. This device mus taccept any interferenc e
received, includin ginterfe rencethatm ay
caus eundesired operation of th edevice .
Removal, tam peri
ng, or altering of th
edevice
will voi dany warranties, and is no tpermitted. Do no
ttamper with, alter, or use in any non-
approve dway.
An yu nauthorize dmodification to this device
could voi dthe user's authorit ytoo perate th e
equipment.
Rada rsensor s
The Active Blind Spot Assis trada rsensor sare
integrate dintot he fron tand rear bumpers and
behind acover in th eradiato rtrim. Mak esure
that th ebumpers and th ecover in th eradiato r
grill are free of dirt, ice or slush. The rear sensor s
mus tnotbe covered, e.g. by bicycle racks or
overhangin gloads .Following asevere impact or
in th eevent of damage to th ebumpers ,havet he
function of th erada rsensor schecked ataq uali-
fie ds pecialist workshop .Activ eBlind Spot
Assis tmay otherwise no longer wor kproperly.
Monitoring area
GWARNIN G
Active Blind Spot Assis tdoes no tdetec tall
traffic situation sand roa dusers. There is a
ris kofana ccident.
Always mak esuret hatthe re is sufficien tdis-
tance on th eside for other traffic or obstacles.
Active Blind Spot Assis tmonitors th earea up to
10 ft (3. 0m)behind your vehicl eand directl y
next to your vehicle, as shown in th ediagram.
Driving systems195
Driving and parking
Z

The detection of obstacles can be impaired in
the case of:
Rthere is dirt on the sensors or anything else
coveringthe sensors
Rpoor visibility, e.g. due to rain, snow or spray
Vehicles in the monitoring range are then not
indicated.
Active Blind Spot Assist may not detect narrow
vehicles, such as motorcycles or bicycles, or
may only detect them too late.
If the lanes are narrow, vehicles driving in the
lane beyond the lane next to your vehicle may be
indicated, especially if the vehicles are not driv- ing in the middle of their lane. This may be the
case if there are vehicles at the inner edge of
your lane.
Due to the nature of the system:
Rwarnings may be issued in error when driving
close to crash barriers or similar solid lane
borders.
Rwarnings may be interrupted when driving
alongside particularly long vehicles, e.g.
trucks, for aprolonged time.
Warning display
:Warning display
Active Blind Spot Assist is not operational at
speeds below approximately 20 mph (30 km/h).
Vehicles in the monitoring range are then not
indicated.
If av ehicle is detected within the blind spot
monitoring range at speeds above 20 mph
(3 0k m/ h),w arnin glamp :on the correspond-
ing side lights up red. This warnin gisalways
emitted when avehicle enters the blind spot
monitoring range from behind or from the side.
When you overtake avehicle, the warnin gonly
occurs if the differenc einspeed is less than
7m ph (12 km/h). If you select the reverse gear, Active Blind Spot
Assis
tisnot operational.
The brightness of the warnin glamps is auto-
matically adapted to the brightness of the sur-
roundings.
When Active Blind Spot Assis tisactivated, gray
radar waves propagatin gbackwards appear
nex ttot he vehicle in the assistance display in
the multifunction display. Abov easpeed of
20 mph (30 km/h), the color of the radar waves
in the assistance display changes to green ;.
Active Blind Spot Assis tisthen ready for use.
Visua land acoustic collision warning
If you switc honthe turn signals to change lanes
and avehicle is detected in the side monitoring
range, you receiv eavisual and acoustic collision
warning. You will then hear adouble warning
ton eand red warnin glamp :flashes. If the turn
signal remainso n, detected vehicles are indica-
ted by the flashingofr ed warninglamp :.
There are no further warnin gtones.
Course-correcting brake application
If Active Blind Spot Assis tdetects arisk of alat-
eral collision in the monitoring range, acourse-
correcting brake application is carried out. This
is meant to assist you in avoiding acollision.
GWARNING
Ac ourse-correctin gbrake application cannot
always preventac ollision.There is arisk of an
accident.
Always steer ,brake or accelerate yourself,
especially if Active Blind Spot Assis twarns
you or makes acourse-correctin gbrake appli-
cation. Always maintain asafe distance at the
sides.
196Driving systems
Driving and parking

Ifac ourse-correcting brake application occurs,
red warning lamp :flashe sinthe exterior mir-
ror and adualw arning tone sounds. In addition,
display ;underlining the danger of aside col-
lision appears in the multifunction display.
In very rare cases, the system may make an
inappropriate brake application. Acourse-cor-
recting brake application may be interrupted at
any time if you steer slightly in the opposite
direction or accelerate.
The course-correcting brake application is avail-
abl eint he speed range between 20 mph
(30 km/h) and 120 mph (200 km/h).
Either no braking application, or acourse-cor-
recting brake application adapted to the driving
situation occurs if:
Rthere are vehiclesoro bstacles,e.g. crash
barriers, located on both sides of you rvehicle.
Rav ehicle approaches you too closely at the
side.
Ryou have adopted asporty driving style with
high cornering speeds.
Ryou clearl ybrake or accelerate.
Rad riving safety system intervenes, e.g. ESP®
or PRE-SAFE®Brake.
RESP®is switched off.
Raloss of tire pressure or adefective tire is
detected.
Switching on Activ eBlind Spot Assist
XMake sure that Active Blind Spot Assist is
activated in the on-board computer
(
Ypage 213).
XTurn the SmartKey to position 2in the ignition
lock.
Warning lamps :in the exterior mirrors light
up red for approximately 1.5 seconds .Gray
rada rwave spropagating backwards appear
next to the vehicle in the assistance display in
the multifunction display.
Active Lane Keeping Assist
General notes
Active Lane Keeping Assist monitors the area in
front of you rvehicle by means of multifunction
camera :at the top of the windshield. Various
different area stothe front, rear and side of your
vehicle are also monitored with the aid of the
rada rsensor system. Active Lane Keeping
Assist detects lane markings on the road and
can warn you before you leave you rlane unin-
tentionally .Ifyou do not react to the warning, a
lane-correcting application of the brakes can
bring the vehicle back into the originall ane.
Important safety notes
If you fail to adapt yourdriving style, Active Lane
Keeping Assist can neither reduce the risk of
accident nor override the law sofphysics. Active
Lane Keeping Assist cannot take account of
road and weather conditions. It may not recog-
nize traffic situations. Active Lane Keeping
Assist is only an aid .You are responsible for the
distance to the vehicle in front, for vehicle
speed,f or braking in good time and for staying in
you rlane.
Active Lane Keeping Assist cannot continuously
keep you rvehicle in its lane.
GWARNING
Active Lane Keeping Assist cannot always
clearl ydetect lane markings.
In such cases, Active Lane Keeping Assist
can:
Rgive an unnecessary warning and then
make acourse-correcting brake application
to the vehicle
Rnot give awarning or intervene
There is arisk of an accident.
Driving systems197
Driving and parking
Z

Alwayspayparticula rattentio ntothe traffic
situatio nand kee pwithint he lane, especially
if Active Lane Keeping Assist alerts you. Ter-
minate the interventio ninanon-critica ldriv-
ing situation.
The system maybei mpaired or maynot function
if:
Rther eisp oorvisibility ,e.g.d ue to insufficient
illuminatio nofthe road, or du etosnow,rain,
fog or spray
Rther eisg lare,e.g.f rom oncoming traffic, the
sunorr eflections (e.g. when the roa dsurface
is wet)
Rthe windshield is dirty,f ogged up,damag ed or
covered ,for instance by asticker, in the vicin-
ity of the camera
Rthe rada rsensors in the front or rea rbum pers
or the radiato rtrim ar edirty,e .g.o bscured by
snow
Rther eareno, severa lorunclea rlan em arkings
for alan e, e.g .inareas with roa dconstruction
work
Rthe lane marking sareworn away ,darkorc ov-
ere dup,e.g .byd irtors now
Rthe distance to the vehicl einfront is too small
and the lane marking sthusc annotbed etec-
ted
Rthe lane marking schange quickly, e.g .lan es
branch off, cros sone another or merge
Rthe roa disnarrow and winding
Rtherearestrong shadows cas tonthe road
If no vehicl eisdetectedint he adjacent lane and
broken lane marking saredete
cted, no lane-cor-
recting brake applicatio nism ade.
Warning vibration in the steering wheel
Aw arning maybeg iven if afront whee lpasses
ove ralanem arking .Itw illw arny ou by means of
intermittent vibratio ninthe steering whee lfor
up to 1.5 seconds.
Lane -correcting brake application
If you leave you rlane, unde rcertai ncircumstan-
ces the vehicle will brake briefly on one side.
Thisism eant to assist you in bringing the vehicle
back to the original lane.
GWARNING
Al ane-correcting brake application cannot
always bring the vehicle back into the original lane. Thereisar isk of an accident.
Always steer, brake or accelerate yourself,
especially if Active Lane Keeping Assis twarns
you or makes alane-correcting brake appli-
cation.
If al ane-correcting brake application occurs,
display :appear sinthe multifunction display.
The brake application also slightly reduces vehi-
cle speed.
Thisf unctio nisavailable in the range between
40 mph and 120 mph (60 km/h and 200 km/h).
Al ane-correcting brake application can be made
after driving over alanem arking detected as
being solid or broken. Before this, awarning
must be give nbym eans of intermittent vibration
in the steering wheel. In addition, alanew ith
lane markings on both sides must be recog-
nized.
In the case of abroken lane marking being
detected,al ane-correcting brake application
can only be mad eifavehicle has beend etected
in the adjacent lane. Oncoming vehicles ,over-
taking vehicles and vehicles in adjacent lanes
can be detected.
iAf urthe rlane-correcting brake application
can only occur after you rvehicle has returned
to the original lane.
No lane-correcting brake application occurs if:
Ryou clearly and actively steer, brake or accel- erate.
Ryou cut the corner on asharp bend.
Ryou have switched on the turn signal.
Rad riving safety system intervenes, e.g. ESP®,
PRE-SAFE®Brake or Active Blind Spot Assist.
198Driving systems
Drivin gand parking

Important safety notes
GWARNING
If you operate information systems and com-
munication equipmen tintegrate dinthevehi-
cle while driving ,you will be distracte dfrom
traffic conditions. You could also lose control
of th evehicle. Ther eisariskofana ccident.
Only operate th eequipmen twhen th etraffic
situation permits. If you are no tsuret hatthis
is possible ,park th evehicl epayin gattention
to traffic condition sand operate th eequip-
men twhen th evehicl eiss tationary.
You must observ ethe legal requirements for th e
country in whic hyou are currentl ydriving when
operating th eon-bo ard computer.
GWARNIN G
If th einstrumen tcluste rhas faile dormal-
functioned, you may no trecognize function
restriction sinsystems relevan ttosafety. The
operating safet yofyour vehicl emay be
impaired .Ther eisar iskofana ccident.
Drive on carefully. Hav ethe vehicl echecked
at aq ualified specialist workshop immedi-
ately.
If th eoperating safet yofyour vehicl eis
impaired ,pull ove rassoonasitiss afetodos o.
Contac taqualified specialist workshop.
The on-board computer only shows message sor
warning sfromc ertai nsystems in th emultifunc-
tion display. You should therefor emakes ure
your vehicl eisoperating safely at all times .
Fo rano verview, see th einstrumen tpanel illus-
tration (
Ypage 34).
Display sand operation
Instrumen tcluster lighting
The lighting in th einstrumen tcluster, in th edis-
plays and th econtrols in thevehicl einterior can
be adjusted usin gbrightness control knob :.
XTurn brightness control knob :up or down .
If you tur nthe ligh tswitch (Ypage 110) to th e
T, ÃorL position ,the brightness
will depend upon th ebrightness of th eambi -
en tlight.
iThe ligh tsensor in th einstrumen tcluste r
automatically control sthe brightness of th e
multifunction display.
In daylight, th edisplays in th einstrumen t
cluste rare illuminated. Adimming function is
no tp ossible in daylight.
Speedometer with segments
The speedometer is divided int osegments on
Mercedes-AM Gvehicles or vehicles wit h
DISTRONI CPLUS.
The segments in th espeedometer indicat e
whic hspee drange is available.
RCruis econtro lactivated (Ypage 160):
The segments ligh tupfromt hestore dspee d
to th etype-tested maximum speed.
RDISTRONI CPLUSa ctivated (Ypage 162):
On eort wo segments in th eset spee drange
ligh tup.
RDISTRONI CPLUSd etects avehicl einf ront
that is driving at aslower spee dthant he
store dspeed:
The segments between th espee doft hevehi-
cle in fron tand th estoreds pee dligh tup.
200Display sand operation
On-boardc omputer and displays

Display messagesPossible causes/consequences andMSolutions
The yellow!warning lamp lights up and th ered F (USAonly)
or ! (Canada only) indicator lamp flashes .
It is no tpossibl etoapply th eelectric parking brak emanually.
XShift th etransmission to position P.
XVisitaqualified specialist workshop .
$(USA
only)
J(C anada
only)
Check Brake Fluid
Level
There is no tenough brak efluidint hebrak efluid reservoir .
In addition ,the $ (USAonly) or J (Canada only) warning lamp
lights up in th einstrumen tcluste rand aw arning tone sounds.
GWARNIN G
The braking effec tmay be impaired.
There is ariskofana ccident.
XPull overand stop th evehicl esafely as soo naspossible, payin g
attention to roa dand traffic conditions. Do no tcontinue driving
under any circumstances.
XSecur ethe vehicl eagainst rollin gaway (Ypage 152).
XConsult aqualified specialist workshop .
XDo notadd brak efluid .This does no tcorrect them alfunction .
#
CheckBrakePadWear
The brak epads/linings hav ereached their wear limit.
US Ao nly: th e$ red brak esystem warning lamp is lit while th e
engin eisrunning.
XVisit aqualified specialist workshop .
G
Inoperative
Oneorm orem ain features of th embrace system are malfunctioning .
XVisitaqualified specialist workshop .
Collision Preven‐tionAssist Plu sCurrently Unavaila‐ble See Operator' sManual
COLLISION PREVENTION ASSIST PLU Sistemporarily no toperational.
Possibl ecauses are:
Rther adar sensor system is temporarily inoperative, e.g. due to elec -
tromagneti cradiation emitted by nearby TV or radi ostation sor
other source sofelectromagneti cradiation .
Rthes ystem is outside th eoperating temperature range.
Rtheo n-bo ardv oltag eistoolow.
Whe nthe causes state dabov enol onger apply, th edisplay message
disappears.
COLLISION PREVENTION ASSIST PLU Sisoperational again .
If th edisplay message does no tdisappear :
XPull overand stop th evehicl esafely as soo naspossible, payin g
attention to roa dand traffic conditions.
XSecur ethe vehicl eagainst rollin gaway (Ypage 152).
XRestart th eengine.
Display messages22 5
On-boardc omputer andd isplays
Z

Display messagesPossible causes/consequences andMSolutions
Collision Preven‐tionAssist Plu sInoperative
COLLISION PREVENTION ASSIST PLU Sistemporarily inoperative due
to am alfunction .Adaptive Brake Assis tmay also hav efailed.
XVisit aqualified specialist workshop immediately.
PRE-SAFE Inopera‐tiv eSeeOperator' sManual
Importantfunction sofPRE-SAF E®havefailed. Al lother occupant
safet ysystems ,e.g.a ir bags ,remain available.
XVisit aqualified specialist workshop immediately.
PRE-SAFE FunctionsCurrently Limite dSee Operator'sMan‐ual
PRE ‑SAFE®PLU SorP RE‑SAFE®Brake is temporarily inoperative.
Possibl ecauses are:
Rfunction is impaire ddue to heav yrain or snow.
Rther adar sensor system is temporarily inoperative, e.g. due to elec -
tromagneti cradiation emitted by nearby TV or radi ostation sor
other source sofelectromagneti cradiation .
RMercedes-AMG vehicles: ES P®is deactivated
Rthes ystem is outside th eoperating temperature range.
Rtheo n-bo ardv oltag eistoolow.
Whe nthe causes state dabov enol onger apply, th edisplay message
disappears.
PRE ‑SAFE
®PLU Sand PRE ‑SAFE®Brake are operational again .
If th edisplay message does no tdisappear :
XPull overand stop th evehicl esafely as soo naspossible, payin g
attention to roa dand traffic conditions.
XSecur ethe vehicl eagainst rollin gaway (Ypage 152).
XRestart th eengine.
XMercedes-AMG vehicles: switch ES P®on again(Ypage 68).
PRE-SAFE FunctionsLimitedSee Opera‐tor's Manual
PRE ‑SAFE®PLU SorP RE‑SAFE®Brake is unavailable due to amal-
function .BAS PLU SwithC ross-Traffic Assis tmay also hav efailed.
XVisit aqualified specialist workshop immediately.
226Display messages
On-boardc omputer andd isplays