2018 MERCEDES-BENZ CLA COUPE brake sensor

XPress retainingclips :at the same time in
the direction of the arrows.
XCarefully remove the bulb holder together
with the connected plug and the bulbs.
Bulb holder
;
Brake lamp
=Brake lamp
?Rear fog lamp
ABackup lamp
BTurn signals
XBrake lamp and backup lamp: remove the
corresponding bulb from the bulb holder.
XInsert the new bulb into the bulb holder.
XRear fog lamp and turns ignal:press the
bulb gently into the bulb holder, turn it coun-
ter-clockwise and remove it from the bulb
holder.
XInsert the new bulb into the bulb holder and
turn it clockwise.
XReinsert the bulb holder and engage on
retainin gclips :.
XClose the side trim panel (Ypage 106).
Windshield wipers
Switching the windshield wipers
on/off
!
Do not operate the windshield wipers when
the windshield is dry, as this could damage
the wiper blades. Moreover, dust that has col-
lected on the windshield can scratch the glass
if wiping takes place when the windshield is
dry.
If it is necessary to switch on the windshield
wipers in dry weather conditions, alwaysu se
washer fluid when operating the windshield
wipers.
!If the windshield wipers leave smears on the
windshield after the vehicle has been washed
in an automatic car wash, wax or other resi-
dues may be the reason for this. Clean the
windshield using washer fluid after washing
the vehicle in an automatic car wash.
Combination switch
1
$ Windshield wiper off
2ÄIntermittent wipe, low (rain sensor set
to low sensitivity)
3Å Intermittent wipe, high (rain sensor
set to high sensitivity)
4° Continuous wipe, slow
5¯Continuous wipe, fast
BíSingle wipe/î Wipes the wind-
shield using washer fluid
XSwitc hont he ignition.
XTurn the combination switch to the corre-
sponding position.
!Vehicles with arain sensor: if the windshield
becomes dirty in dry weather conditions, the
windshield wipers may be activated inadver-
tently. This could then damage the windshield
wiper blades or scratch the windshield.
For this reason, you should alwayss witch off
the windshield wipers in dry weather.
Vehicles with arain sensor: in the ÄorÅ
position, the appropriate wiping frequency is
automatically set accordingtot he intensity of
the rain. In the Åposition, the rain sensor is
more sensitive than in the Äposition, caus-
ing the windshield wiper to wipe more fre-
quently.
If the wiper blades are worn, the windshield will
no longer be wiped properly. This could prevent
you from observing the traffic conditions.
Windshield wipers107
Lights and windshield wipers
Z

iWhen you switch off the engine, the last
speed stored is cleared.
Distance Pilot DISTRONIC
General notes
Distance Pilot DISTRONIC regulates the speed
and automatically helps you maintain the dis-
tanc etot he vehicle detected in front. Vehicles
are detected with the aid of the radar sensor
system. Distance Pilot DISTRONIC brakes auto-
matically to avoid exceedingt he set speed or to
maintain the designated distanc efrom the vehi-
cle in front.
If Distance Pilot DISTRONIC detect sthat there is
ar isk of acollision, you will be warned visually
and acoustically. Without your intervention, Dis-
tanc ePilot DISTRONIC cannot prevent acolli-
sion. An intermittent warning ton ewill then
sound and the distanc ewarning lamp will light
up in the instrument cluster. Brake immediately
in order to increase the distanc etothe vehicle in
frontort ake evasive action provided it is safe to
do so.
Distance Pilot DISTRONIC operates in the range
between 0mph (0 km/h) and 120 mph
(200 km/h).
Change into alower gear in good time on long
and steep downhill gradients .This is especially
importan tifthe vehicle is laden. By doing so, you
will make use of the braking effect of the engine.
This relieves the load on the brake system and
preventst he brakes from overheatin gand wear-
ing too quickly.
Do not use Distance Pilot DISTRONIC on roads
with steep gradients.
For Distance Pilot DISTRONIC to assist you
when driving, the radar sensor system must be
operational.
Sinc eDistance Pilot DISTRONIC transmits radar
waves, it can resemble the radar detectors of
the responsible authorities. You can refer to the
relevant chapter in the Operator' sManual if
questions are asked about this.
iUSA only: This device has been approved by
the FCC as a"Vehicular Radar System". The
radar sensor is intended for use in an auto-
motive radar system only. Removal, tamper-
ing, or altering of the device will void any war-
ranties, and is not permitted by the FCC. Do not tamper with, alter, or use in any non-
approved way.
An
yu nauthorized modification to this device
could void the user's authority to operate the
equipment.
iCanada only: This device complies wit h
RSS-210 of Industry Canada. Operation is
subject to the following two conditions:
1. This device may not cause interference,
and
2. This device must accept any interference
received, including interference that may
cause undesired operation of the device.
Removal, tampering, or altering of the device
will void any warranties, and is not permitted. Do not tamper with, alter, or use in any non-
approved way.
An yu nauthorized modification to this device
could void the user's authority to operate the
equipment.
Important safety notes
GWARNING
Distance Pilot DISTRONIC does not react to:
Rpeople or animals
Rstationary object sonthe road, e.g. stopped
or parked vehicles
Roncoming vehicles and crossingt raffic
As aresult, Distance Pilot DISTRONIC may
neither give warnings nor intervene in such
situations. There is arisk of an accident.
Always pay careful attention to the traffic sit- uation and be ready to brake.
GWARNING
Distance Pilot DISTRONIC cannot always
clearly identif yother road users and complex
traffic situations.
In such cases, Distance Pilot DISTRONIC may:
Rgive an unnecessary warning and then
brake the vehicle
Rneither give awarning nor intervene
Raccelerateorb rake unexpectedly
There is arisk of an accident.
Driving systems151
Driving and parking
Z

Continue todrivecarefull yand beread yto
brake, especiall yifDistance Pilot DI STRONIC
warn syou.
GWAR NING
Distance Pilot DI STRONICb rakes your veh icle
wit hupt o50% of th emaximum possible
deceleration. Ifth is deceleratio nisnotsuff i-
cient ,Distance Pilot DI STRONICa lertsyou
wit hav isual and acoustic warning.Thereisa
ris kofana cciden t.
Ap ply theb rakes yourself inthese situations
and tr ytot akee vasive action.
!When Distance Pilot DI STRONICo rthe
HOLD function isactivated, th evehicle
brakes automaticall yincertain situations.
To avoid damag etotheveh icle,deactivate
Distance Pilot DI STRONICa nd theHOLD
function inthef ollowin gors imilar situations:
Rwhen to wingthev ehicle
Rinthec ar wash
If you fail to adapt your driving style, Distance
Pilot DI STRONICc an neither reduce th erisko f
an acc identnor overr idethel aws of physics.
Distance Pilot DISTRONICc annottak ei nto
accountr oad,weather or traff icconditions .Dis-
tance Pilot DI STRONICi sonlyana id.You are
responsible for thedistanc etotheveh icle in
front, for veh iclespeed, for braking ingood time
and for staying inyour lane.
Do no tuse Distance Pilot DI STRONIC:
Rinroad and traff icconditions whichdon ot
allow you to maintain aconstant speed,e.g.in
heavyt raffic or on winding roads
Ronslipp ery road surfaces .Brakin gora ccel-
erating could caus ethe driv ewheelstol ose
t
raction and th evehicle could then skid
Rwhen there ispoor vis ibility, e.g .due to fog,
heavyr ain or snow
Distance Pilot DI STRONICm ay notdetect nar-
row veh iclesdriving infront, e.g .motorcycles, or
veh iclesdriving on adifferent line.
In particular ,the detection of obstacle scan be
impaired if:
Rthere is dirt on thesensorsora nythingelse
covering th esensors
Rthere issnow or heavyr ain
Rthereisinterferenc ebyother radar sources
Rthere are stron gradar reflections ,for exam-
ple, in parking garages
If Distance Pilot DI STRONICn olonger detect sa
vehicle in front, itmay unexpect edlyaccelerate
to th espeeds tored.
This speedm ay:
Rbetooh igh ifyou are driving inaf ilter lane or
an exit lane
Rbeso high when driving inther ight-handl ane
that you overtake vehicle sintheleft-hand
lane
Rbe so high in th eleft lane that you pass vehi-
cle sd riving in th erigh tlane
If there isac hang eofd rivers,adviset henew
driv er of th espeeds tored.
Cruise control lever
:St ore sthe curren tspeedorah igher speed
;Storesthe curren tspeedoral ower speed
=Deactivates Distance Pilot DI STRONIC
?Store sthe curren tspeedorc alls up thelast
store dspeed
ASet sas pecifie dminimum distance
Activating Distance Pilot DISTRONIC
Activation conditions
!When Distance Pilot DI STRONICort he
HOLD function isactivated, th evehicle
brakes automaticall yincertain situations.
To avoid damag etothevehicle ,deactivate
Distance Pilot DI STRONICa nd theHOLD
function in th efollowin gors imilar situations:
Rwhen towing th evehicle
Rin th ecar wash
152Driving systems
Driving and parking

Selecting Sport mode
The firmer settingofthe suspension tuning in
the Sport drive program ensures even better
contact with the road. Select this drive program
when employing asporty driving style, e.g. on
winding countryr oads.
XPress DYNAMICS ELECT button (Ypage 128)
as many times as necessary until the Sport
drive program is selected.
Parking Assist PARKTRONIC
Important safety notes
Parking Assist PARKTRONIC is an electronic
parking aid with ultrasound. It monitor sthe area
around your vehicle using six sensors in the
front bumper and six sensors in the rear
bumper. Parking Assist PARKTRONIC visually
and audibly indicates the distance between your
vehicle and an object.
Parking Assist PARKTRONIC is only an aid. It is
not areplacement for your attention to your
immediate surroundings. You are always
responsible for safe maneuvering, parking and
exiting aparking space. Make sure that there
are no persons, animals or object sinthe maneu-
vering area while maneuvering and parking in/
leaving parking spaces.
!When parking, pay particular attention to
object sabove or below the sensors, such as
flower pots or trailer drawbars. Parking Assist
PARKTRONIC does not detect such objects
when they are in the immediate vicinity of the vehicle. You could damage the vehicle or the
objects.
The sensors may not detect snow and other
object sthat absorb ultrasonic waves.
Ultrasonic sources such as an automatic car
wash, the compressed-air brakes of atruck or
ap neumatic drill could cause Parking Assist
PARKTRONIC to malfunction.
Parking Assist PARKTRONIC may not function
correctly on uneven terrain.
Parking Assist PARKTRONIC is activated auto-
matically when you:
Rswitch on the ignition
Rshift the transmission to position h,kor
i
Rrelease the electric parking brake Parking Assist PARKTRONIC is deactivated at
speeds above 11 mph (18 km/h). It is reactiva-
ted at lower speeds.
Range of the sensors
General notes
Parking Assist PARKTRONIC does not take into
account obstacles located:
Rbelow the detection range, e.g. people, ani-
mals or objects.
Rabove the detection range, e.g. overhanging
loads, tail section
sorloading ramps of trucks.
:Sensors in the front bumper, left-hand side
(example)
The sensors must be free from dirt, ice or slush.
They can otherwise not function correctly. Clean
the sensors regularly,t aking care not to scratch
or damage them (
Ypage 265).
Driving systems161
Driving and parking
Z

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 B.
XVisitaqualified specialist workshop .
$(USAonly)
J(Canada only)
Check Brake Fluid
Level
There is no tenough brak efluidint hebrak efluid reservoir .
Aw arning tone sounds. The $(USAonly) or J (Canada only)
warning lamp sintheinstrumen tcluste rmay also ligh tup.
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 141).
XConsult aqualified specialist workshop .
XDo notadd brak efluid .This does no tcorrect them alfunction .
#
CheckBrakePadWear
The brak epads/linings hav ereached their wear limit.
XVisit aqualified specialist workshop .
G
Inoperative
Oneorm orem ain features of th embrace system are malfunctioning .
XVisitaqualified specialist workshop .
ActiveBrakeAssistFunctionsCurrentlyLimitedSee Opera‐tor's Manual
Active Brake Assis tistemporarily inoperative.
Possibl ecauses are:
RThe radar sensor system is temporarily inoperative, e.g. due to
electromagneti cradiation emitted by nearby TV or radi ostation sor
other source sofelectromagneti cradiation .
RThe system is outside th eoperating temperature range.
RThe on-boar dvoltag eistoolow.
Whe nthe causes state dabov enol onger apply, th edisplay message
disappears.
Active Brake Assis tisoperational 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 141).
XRestart th eengine.
Active BrakeAssist :SystemInop‐erative
Active Brake Assis tisunavailable due to amalfunction .Situation -
dependen tbraking assistanc emay also hav efailed.
XVisit aqualified specialist workshop immediately.
Display messages197
On-boardc omputer andd isplays
Z

Display messagesPossible causes/consequences andMSolutions
RadarSensorsDirtySee Operator' sMan‐ual
The radar sensor system is malfunctioning .
Possibl ecauses are:
RDirt on sensor s
RHeavy rain or snow
RWhendrivin goni nter-urban roads without traffic or infrastructure,
e.g. in desert-like area s
At least on edrivin gsystem or drivin gsafet ysystem is malfunctioning
or is temporarily unavailable :
RActive Brake Assist
RDistancePilotD ISTR ONIC
Aw arning tone also sounds.
Once th ecaus eoft heproblem is no longer present, th edrivin gand
drive safet ysystems will be available again .The display message dis-
appears.
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 141).
XSwitc hoff th eengine.
XClean all sensor s(Ypage 265).
XRestart theengine.
The display message disappears.
6
SRSMalfunctionSer ‐viceRequired
The restrain tsystem is malfunctioning .The 6 warning lamp also
lights up in th einstrumen tcluster.
GWARNIN G
The air bags or Emergency Tensioning Devices may either be triggered
unintentionally or, in th eevent of an accident, may no tbetriggered .
There is an increased ris kofinjury.
XVisit aqualified specialist workshop immediately.
Fo rfurther information about th erestrain tsystem, see (
Ypage 40).
6
Front Lef tMalfunc‐tionServic eRequiredorFrontRight MalfunctionServic eRequired
The restrain tsystem is malfunctioning at th efront on th eleftorr ight.
The 6 warning lamp also lights up in th einstrumen tcluster.
GWARNIN G
The air bags or Emergency Tensioning Devices may either be triggered
unintentionally or, in th eevent of an accident, may no tbetriggered .
There is an increased ris kofinjury.
XVisit aqualified specialist workshop immediately.
198Display messages
On-boardc omputer andd isplays

Display messagesPossible causes/consequences andMSolutions
TirePress.Sen‐sor(s) Missin gUSAo nly:
There is no signal from th etirep ressur esensor of on eorseveral tires .
The pressur eoftheaffecte dtired oes no tappear in th emultifunction
display.
XHav ethe fault ytirep ressur esensor replace dataqualified special -
ist workshop .
TirePressure Moni‐tor Inoperative NoWheel Sensor s
USAo nly:
The wheels mounte ddonothav eas uitable tire pressur esensor .The
tire pressur emonitor is deactivated.
XMoun twheels wit hsuitable tire pressur esensors.
The tire pressur emonitor is activated automatically after drivin gfor
af ew minutes.
Tir ePress.Monito rInoperativeUSAo nly:
The tire pressur emonitor is faulty.
XVisit aqualified specialist workshop .
Vehicle
Display messagesPossible causes/consequences and MSolutions
DepressBrake toStart EngineYou hav eattempte dtostart th eenginew itht he transmission in posi-
tion Nwithout depressing th ebrak epedal .
XDepress th ebrak epedal .
ToDeselect PorN,DepressBrake andStart Engine
You hav eattempte dtoshift th etransmission to position Ror Dwith-
out starting th eengine.
XStart th eengine.
XDepress th ebrak epedal .
iIt is only possibl etoshift th etransmission from position Pto th e
desire dposition if you depress th ebrak epedal .Onlyt henc an th e
parking loc kbedeactivated. If you do no tdepress th ebrak epedal ,
th eD IRECT SELECT lever can still be moved but th eparking loc k
remain sengaged.
iAt transmission fluid temperatures belo wÒ4‡ (Ò20 †) you can
only shift out of position Pint oa nother transmission position when
th ee ngineisr unning.
Apply Brake toShift fro m'P'You hav eattempte dtoshift th etransmission to position R,N or D
without depressing th ebrak epedal .
XDepress th ebrak epedal .
Display messages213
On-boardc omputer andd isplays
Z