2018 MERCEDES-BENZ CLA COUPE parking brake

Switching on Blind Spot Assist
XMake sure that Blind Spot Assist is activated
in the on-board computer (Ypage 186).
XTurn the SmartKey to position2in the igni-
tion lock.
Warning lamps :in the exterior mirrors light
up red for approximately 1.5 seconds and
then turn yellow.
Lane Keeping Assist
General notes
Lane Keeping Assist monitor sthe area in front of
your vehicle by means of multifunction cam-
era :which is attached behind the top of the
windshield. Lane Keeping Assist detectsl ane
markings on the road and can warn you before
you leave your lane unintentionally.
This function is available in the range between
40 mph and 120 mph (60 km/h and 200 km/h).
Aw arning may be given if afront wheel passes
over alane marking. It will warn you by means of
intermittent vibration in the steering wheel for
up to 1.5 seconds.
Important safety notes
GWARNING
Lane Keeping Assist cannot always clearly
detect lane markings.
In such cases, Lane Keeping Assist can:
Rgive an unnecessary warning
Rnot give awarning
There is arisk of an accident.
Always pay particular attention to the traffic
situation and keep within the lane, especially
if Lane Keeping Assist alerts you.
GWARNING
The Lane Keeping Assist warning does not
return the vehicle to the original lane. There is
ar isk of an accident.
You should always steer, brake or accelerate
yourself, in particular if warned by Lane Keep-
ing Assist.
If you fail to adapt your driving style, Lane Keep-
ing Assist can neither reduce the risk of an acci-
dent nor override the laws of physics. Lane
Keeping Assist cannot take into account the
road, traffic and weather conditions. Lane Keep- ing Assist is merely an aid. You are responsible
for the distance to the vehicle in front,f or vehi-
cle speed, for braking in good time and for stay-
ing in your lane.
The Lane Keeping Assist does not keep the vehi-
cle in the lane.
The system may be impaired or may not function
if:
Rthere is poor visibility, e.g. due to insufficient
illumination of the road, or due to snow, rain,
fog or spray
Rthere is glare, e.g. from oncomingt raffic, the
sun or reflection from other vehicles (e.g. if
the road surface is wet)
Rthe windshield is dirty, fogged up, damaged or
covered, for instancebyas ticker, in the vicin-
ity of the camera
Rthere are no or several unclear lane markings
for one lane, e.g. roadworks
Rthe lane markings are worn away,d ark or cov-
ered up, e.g. by dirt or snow
Rthe distance to the vehicle in front is too short
and thus the lane markings cannot be detec-
ted
Rthe lane markings change quickly, e.g. lanes
branch off, cross one another or merge
Rthe road is narrow and winding
Rthere are highly variable shade conditionso n
the roadway
Switching on Lane Keeping Assist
XSwitch on Active Lane Keeping Assist using
the on-board computer; to do so, select
Standard
or Adaptive(Ypage 174).
If you drive at speeds above 40 mph
(60 km/h) and lane markings are detected,
the lines in the assistance graphic are shown
174Driving systems
Driving and parking

in green (Ypage 185). Lane KeepingAssist is
ready for use.
If Standard
is selected, no warnin gvibration
occurs if:
Ryou have switched on the turn signal. In this
event, the warnings are suppressed for acer-
tain period of time.
Rad rivings afetysystem intervenes ,e.g. ABS,
BA SorE SP®.
When Adaptive
is selected, no warnin gvibra-
tion occurs if:
Ryou have switched on the turn signal. In this
event, the warnings are suppressed for acer-
tain period of time.
Rad rivings afetysystem intervenes ,e.g. ABS,
BA SorE SP®.
Ryou accelerateh ard, e.g. kickdown.
Ryou brakehard.
Ryou steer actively, e.g. swervetoa void an
obstacle or change lanes quickly.
Ryou cut the corner on asharp bend.
In order that you are warne donly when neces-
sary and in good tim eifyou cross the lane mark-
ing, the system detect scertain condition sand
warns you accordingly.
The warnin gvibration occurs earlier if:
Ryou approacht he outer lane marking on a
bend
Rthe road has very wide lanes, e.g. afreeway
Rthe system detect ssolid lane markings
The warnin gvibration occurs later if:
Rthe road has narrow lanes.
Ryou cut the corner on abend
Driving systems175
Driving and parking
Z

Display messagesPossible causes/consequences andMSolutions
T!
÷
Inoperative SeeOperator' sManual
EBD( electronic brak eforce distribution), ABS, BAS, ES P®,the HOLD
function and hill start assist are no tavailable due to amalfunction .
Active Brake Assis tmay hav ealso failed.
Aw arning tone sounds.
In addition ,the ÷, åand! warning lamp smay ligh tupin
th ei nstrumen tcluster.
GWARNIN G
The brak esystem continues to function normally, but without th e
function slisted above. The fron tand rear wheels could therefor eloc k
if you brak ehard, for example.
The steerabilit yand braking characteristics may be severely affected.
The braking distanc einanemergenc ybraking situation can increase.
If ES P
®is no toperational, ES P®is unable to stabiliz ethe vehicle.
There is an increased ris kofskiddin gand an accident.
XDrive on carefully.
XVisit aqualified specialist workshop immediately.
F(US A
only)
!(Canada
only)
Tur nOnt he Igni‐
tiontoReleas etheParkingBrake
The red F(USAonly) or ! (Canada only) indicator lamp lights
up.
You attempte dtorelease th eelectric parking brak ewhile th eignition
was switched off .
XSmartKey:tur nthe SmartKey to position 1in th eignition lock.
XKEYLESS-GO: switch on theignition .
F(USA
only)
!(Canada
only)
Please
Releas ePark‐ing Brake
The red F(USAonly) or ! (Canada only) indicator lamp flashes
and awarning tone sounds. Aconditi on for automatic release of th e
electric parking brak eisnotfulfilled (
Ypage 143).
You are drivin gwitht he electric parking brak eapplied.
XReleas ethe electric parking brak emanually.
The red F(USAonly) or ! (Canada only) indicator lamp flashes
and awarning tone sounds.
You are usin gthe electric parking brak efor emergenc ybraking
(
Ypage 83).
F(US A
only)
!(Canada
only)
Parkin gBrake See
Operator' sManual
The yellow !warning lamp lights up.
The electric parking brak eismalfunctioning .
To apply :
XSwitchthe ignition off .
XPress theelectric parking brak ehandle for at least te nseconds.
XShift th etransmission to position B.
XConsultaqualified specialist workshop .
194Display messages
On-boardcomputer andd isplays

Display messagesPossible causes/consequences andMSolutions
The yellow!warning lamp lights up. The red F(USAonly)
or ! (Canada only) indicator lamp flashes for about te nseconds
after th eelectric parking brak ehas been applie dorreleased. It then
goe sout or remain slit.
The electric parking brak eismalfunctioning .
XSwitchoff th eignition and tur nitbacko n.
XApply th eelectric parking brake.
If it is no tpossibl etoengage th eelectric parking brake:
XShift th etransmission to position B.
XVisitaqualified specialist workshop .
If it is no tpossibl etorelease th eelectric parking brak emanually:
XReleas ethe electric parking brak eautomatically (Ypage 142).
If th eelectric parking brak estill canno tbereleased:
XConsult aqualified specialist workshop .
The yellow!warning lamp lights up. If you manually apply or
release th eelectric parking brake, th ered F (USAonly) or !
(Canada only) indicator lamp flashes .
The electric parking brak eismalfunctioning .Itisnotpossibl etoapply
th ee lectric parking brak emanually.
XShift th etransmission to position B,astheelectric parking
brak eisn otapplie dautomatically.
XVisit aqualified specialist workshop .
F(USA
only)
!(Canada
only)
Parkin gBrake Inop‐
erativ e
The yellow !warning lamp lights up. The red F(USAonly)
or ! (Canada only) indicator lamp flashes for about te nseconds
after th eelectric parking brak ehas been applie dorreleased. It then
goe sout or remain slit.
The electric parking brak eismalfunctioning ,e.g.b ecause of over-
voltag eorundervoltage.
XRemove th ecaus efor th eovervoltage or undervoltage, e.g. by
charging th ebattery or restarting th eengine.
XEngage or release th eelectric parking brake.
If it remain simpossible to apply or release th eelectric parking brake:
XSwitc hoff th eignition and tur nitbacko n.
XEngage or release th eelectric parking brake.
If th eelectric parking brak estill canno tbereleased:
XConsult aqualified specialist workshop .
If th eelectric parking brak estill canno tbeapplied:
XVisitaqualified specialist workshop .
196Display messages
On-boardcomputer andd isplays

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
b
Check LeftBrakeLamporCheck RightBrake Lam p
The leftorright-hand brak elamp is defective.
XChec kwhether you are permitte dtoreplace th ebulb yourself
(Ypage 104).
or
XVisit aqualified specialist workshop .
b
CheckLeftTailandBrake Lampsor
Check Right Tai l
and Brake Lamps
The leftorright-hand tai llamp/brake lamp is defective.
XChec kwhether you are permitte dtoreplace th ebulb yourself
(Ypage 104).
or
XVisit aqualified specialist workshop .
b
CheckLeftHighBeamor Check RightHighBeam
The lef torright-hand high beam is defective.
XChec kwhether you are permitte dtoreplace th ebulb yourself
(Ypage 104).
or
XVisit aqualified specialist workshop .
b
LicensePlate Lam p
The leftorright-hand license plat elamp is faulty.
XVisit aqualified specialist workshop .
b
RearFog Lam p
The rear fog lamp is faulty.
XCheckwhether you are permitte dtoreplace th ebulb yourself
(Ypage 104).
or
XVisit aqualified specialist workshop .
b
Check Front LeftParkingLampor
Check Front Right
Parkin gLamp
The fron tleftorf rontright parking or standing lamp is defective.
XChec kwhether you are permitte dtoreplace th ebulb yourself
(Ypage 104).
or
XVisit aqualified specialist workshop .
b
Backup Light
The backup lamp is defective.
XCheckwhether you are permitte dtoreplace th ebulb yourself
(Ypage 104).
or
XVisit aqualified specialist workshop .
b
Check LeftTailLam porCheck RightTai lLamp
The lef torright-hand tai llamp is defective.
XVisit aqualified specialist workshop .
Display messages203
On-boardc omputer andd isplays
Z

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

Display messagesPossible causes/consequences andMSolutions
StopVehicl eShifttoPLeave EngineRunnin g
The automatic transmission has overheated.
XDrive on carefully.
The automatic transmission is available again when th edisplay
message goe sout.
If th emultifunction display still shows th edisplay message :
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).
XWait until th eautomatic transmission has cooled down and th edis-
play message has disappeared.
Auxiliary Batter yMalfunctionThe auxiliary battery for th eautomatic transmission is no longer bein g
charged.
XVisit aqualified specialist workshop .
XUntilthen, set th etransmission to position Pbefore you switch off
th ee ngine.
XBefor eleaving th evehicle, apply th eelectric parking brake.
Trans. Oil Overhea‐ted Drive on wit hCare
Mercedes-AMG vehicles: th etransmission oil has overheated.
Manual drive progra mM and th etem porarily active manual drive pro -
gra ma re no longer available. The engin epowe routput is reduced.
XAllow th evehicl etoc ooldown .
4matic CurrentlyUnavailable4MATIC has overheated. The vehicl eisonlyd riven by th efront wheels.
XDrive on .
The airflow cools 4MATIC mor equickly.
Whe nthe display message goe sout,4 MATIC is available again and
th ev ehicl eisd riven by all fou rwheels.
4matic Inoperative4MATIC is malfunctioning .The vehicl eisonlyd riven by th efront
wheels.
XVisit aqualified specialist workshop .
NThe trunk lid is open.
XClosethe trunk lid.
MThe hoo disopen.
Aw arning tone also sounds.
GWARNIN G
The open hoo dmay bloc kyour vie wwhen th evehicl eisinm otion.
There is ariskofana ccident.
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).
XClosethe hood.
Display messages215
On-boardc omputer andd isplays
Z