2019 MERCEDES-BENZ CLA COUPE check engine

Problem
Possible
causes/co nsequences and0050 0050
Solutions KEYLE
SS-GO ismalfunctionin g.
X Lock/ unlock thevehicle usingtheremote controlfunct ionofthe
SmartK ey.
X Have thevehicle andSmartK eycheck edataqual ified specialist
workshop.
If the vehicle canalso notbelocked/unlock edusing theremote con-
trol funct ion:
X Unlock (Ypage 77)orlock (Ypage 77)thevehicle usingthe
mechanical key.
X Have thevehicle andSmartK eycheck edataqual ified specialist
workshop. The
engine cannot be
started usingtheSmart-
Key. The
on-board voltageistoo low
X Switch offnon- essential consumers, e.g.seat heating orinterior
lighting, andtrytostart theengine again.
If this does notwork:
X Check thestarter battery andcharge itifnecessary (Ypage 281).
or
X Jump-start thevehicle (Ypage 282).
or
X Consult aquali fiedspecialist workshop. The
engine cannot be
started usingtheStart /
Stop button. TheSmart-
Key isin the vehicle. The
vehicle islocked.
X Unlock thevehicle andtrytostart thevehicle again. The
SmartK eybattery isdischarged ornearly discharged.
X Check theSmartK eybattery (Ypage 73)and replace itifnecessary
(Y page 73).
If this does notwork:
X Start yourvehicle withtheSmartK eyinthe ignition lock. There
isinterf erence fromapowerful sourceofradio waves.
X Start yourvehicle withtheSmartK eyinthe ignition lock. You
have lostaSmart-
Key. X
Have theSmartK eydeactivated ataqual ified specialist workshop.
X Report theloss immediately tothe vehicle insurers.
X Ifnecessary, havethelocks changed aswell. You
have lostthe
mechanical key. X
Report theloss immediately tothe vehicle insurers.
X Ifnecessary, havethelocks changed aswell. Smar
tKey
75Opening andclosing Z

X
Press thelockin gbutton onthe driver’s door
(Y page 76).
X Check whether thelockin gkno bson the
fron t-passenger doorandtherear doors are
still visible. Pressdownthelockin gkno bsby
hand, ifnecess ary.
X Close thedriver's door.
X Take themechanic alkey outofthe Smart Key
(Y page 72).
X Insert themechanic alkey into thelock ofthe
driver's doorasfar asitwill go. X
Turn themechanic alkey clock wiseasfar asit
will gotoposition 0047.
X Turn themechanic alkey back andremove it.
X Make surethatthedoors andthetrunk lidare
locked.
X Insert mechanic alkey into theSmart Key
(Y page 72).
i If
you lock thevehicle asdescribed above,
the fuel filler flapisnot locked. Theanti- theft
alarm system isnot armed. Tr
unk Impor
tantsafety notes G
WARNIN
G
Combustion enginesemitpoisonous exhaust
gases suchascarbon monoxide.Exhaust
gases canenter thevehicle interiorifthe
trunk lidisopen when theengine isrunnin g,
especially ifthe vehicle isin motion .There isa
risk ofpoisoning.
Always switchoffthe engine beforeopening
the trunk lid.Never drivewiththetrunk lid
open. G
WARNIN
G
If object s,luggage orloads arenot secured or
not secured sufficient ly,they could slip,tip
over orbe flung around andthereby hitvehicle
occupant s.There isarisk ofinjury, particu-
larly inthe event ofsudden braking orasud-
den change indirection .
Always storeobject sso that they cannotbe
flung around. Secureobjects,luggage or
loads against slipping ortipping beforethe
journey.
! The
trunk lidswings upwards whenopened.
Therefore, makesurethatthere issufficient
clearance abovethetrunk lid.
The opening dimensions ofthe trunk lidcan be
found inthe "Vehicle data"section
(Y page 325).
You should preferably placeluggage orloads in
the trunk .Observe theloading guidelines
(Y page 239).
Do not leave theSmart Keyinthe trunk .You
could otherwise lockyourself out.
The trunk lidcan be:
R opened andclosed manually fromoutside
R opened automatically fromoutside
R opened automatically frominside
R opened fromtheinside usingtheemergenc y
release Tailgat
eobstru ctiondetection with
reversing feature
On vehicles withanEASY-PA CKtailgate, the
tailgate isequipped withautomatic obstacle
recogn itionwithareversin gfeature. Ifasolid
object blocks orrestr ictsthetailgate whenauto-
matically openingorclosing, thisprocedure is
stopped. Ifthe tailgate isstopped duringthe
closing process, thetailgate automatically
opens againslightly. Theautomatic obstruction
detect ionwith reversin gfeature isonly anaid. It
is not asubstitut efor your atten tivenesswhen
opening andclosing thetailgate. 78
Tr
unkOpening andclosing

!
Do
not warm upthe engine whilestationary.
Pull awayimmediately .Avoid highengine
speeds andfullthrott leuntil theengine has
reached itsoperating temperature.
In vehicles withautomatic transmission,
engage positions Pand Ronly when thevehi-
cle isstationary.
Where possible ,avoid spinning thedrive
wheels whenpulling awa yon slippe ryroads.
You could otherwise damagethedrive train.
! Mercedes-AMG
vehicles:avoid full-loa d
operation andengine speeds greater than
5000 rpmwhen theengine iscold. Thishelps
to protect theengine andavoids uncomfort-
able driving. Key
positions
Smar tKey 005A
Toremove theSmartKey
(shift thetransmission toposition 005D)
0047 Power supplyfor some consumers, suchas
the windshiel dwipers
0048 Ignition (powersupplyfor allconsumers)
and drive position
0049 Tostart theengine
i The
SmartKey canbeturned inthe ignition
lock even ifit is not thecorrect SmartKey for
the vehicle. Theignition isnot switched on.
The engine cannot bestarted.
Star t/Stop button General
notes
Vehicles withKEYLES S-GOareequip pedwith
SmartKeys featuringtheintegrated KEYLESS-
GO function andadetachable Start/Stopbut-
ton. A
check whichperiodica llyestablishes aradio
connec tionbetween thevehicle andtheSmart-
Key determines whetheravalid SmartKey isin
the vehicle. Thisoccurs, forexample, when
starting theengine.
When youinsert theStart/ Stopbutton intothe
ignition lock,thesystem needsapproximately
two seconds recognition time.Youcanthen use
the Start/ Stopbutton.
Pressing theStart/ Stopbutton several timesin
succession corresponds tothe different Smart-
Key positions inthe ignition lock.Thisisonly the
case ifyou arenot depressing thebrake pedal.
If you depress thebrake pedalandpress the
Start/ Stopbutton, theengine startsimmedi-
ately.
To start thevehicle without actively usingthe
SmartKey:
R the Start/ Stopbutton mustbeinserted inthe
ignition lock
R the SmartKey mustbeinthe vehicle
R the vehicle mustnotbelocked withthe
SmartKey orKEYLES S-GO(Ypage 71)
Do not keep theKEYLES S-GOkey:
R with electronic devices,e.g.amobile phone
or another SmartKey.
R with metallic objects, e.g.coins ormetal foil.
R inside metallic objects, e.g.ametal case.
This canaffect thefunctionality ofKEYLES S-GO.
If you lock thevehicle withtheSmartKey remote
cont rolorwith KEYLES S-GO,afterashort time:
R you willnotbeable toswitch onthe ignition
with theStart/ Stopbutton.
R you willnolonger beable tostart theengine
with theStart/ Stopbutton untilthevehicle is
unlocked again.
If you lock thevehicle centrallyusing thebutton
on the front door(Ypage 76),youcan cont inue
to start theengine withtheStart/ Stopbutton.
The engine canbeswitched offwhile thevehicle
is in motion bypressing andholding theStart/
Stop button forthree seconds. Thisfunction
operates independently ofthe ECO start/st op
automatic engineswitch-off function. Driving
123Drivingandparking Z

G
WARNING
Flamma blemateria lsintrodu cedthrough
environmental influence orby anima lscan
ignite ifin contact withtheexhau stsystem or
parts ofthe engine thatheatup. There isarisk
of fire.
Ca rry out regu larchecks tomake surethat
there arenoflamma bleforeig nmateria lsin
the engine compartment orinthe exhau st
system.
Gene ralnote s During
acold start, theengine runsathigh er
spee dstoenabl ethe catal yticconverter to
reach itsopera tingtempera ture.Thesound of
the engine maychange duringthis time.
Automatic transmissio n X
Shift thetransmissi ontoposi tion 005D
(Y pag e132) .
The transmissi onposi tion indica toronthe
multi function displayshow s005D
(Y pag e131) .
i You
canstart theengine intransmissi on
posi tions 005Dand 005C.
Starting procedurewith the SmartKey To
start theengine using the SmartKey instead
of the Start/Stop button,pullthe Start/Stop
button outofthe ignitio nlock.
X Turn theSmartKey toposi tion 0049inthe igni-
tion lock (Ypag e123) andrelease itas soon
as the engine isrunning.
Starting procedurewith the Start/Stop
button The
Start/Stop buttoncanbeused tostart the
vehicl emanua llywitho utinserting theSmartKey
into theignitio nlock. TheStart/Stop button
must beinserted inthe ignitio nlock andthe
SmartKey mustbeinthe vehicl e.This mode for
starting theengine operatesindep endently of
the ECO start/stop automatic enginestartfunc-
tion.
You canstart theengine ifavali dSmartKey isin
the vehicl e.Switch offthe engine andalways
take theSmartKey withyouwhen leaving the vehicl
e,even ifyou only leaveitfor ashort time.
Pay attention tothe importa ntsafety notes.
X Depress thebrake pedaland keep it
depre ssed.
X Press theStart/Stop buttononce
(Y pag e123) .
The engine starts.
Starting procedureviasmartphone Observe
theimporta ntsafety notesonstarting
the engine (Ypag e124) .
You canalsostart yourengine viayou rsmart-
phone fromoutsidethe vehicl e.In this case, the
previ ouslysele cted clima tecontrol settingis
activa ted.Inthis way youcan cool orheat the
interior ofthe vehicl ebefore starting thejour-
ney.
Only start theengine viayou rsmartpho neifit is
safe tostart andruntheengine whereyourvehi-
cle isparked .
Observe thelega lstipu lations inthe area where
you rvehicl eis parked .Engine startviasmart-
phone maybelimi ted tocertain countries or
regio ns.
You canexecute amaximu mof two consecutive
starting attempts viayou rsmartpho ne.Ifyou
insert theSmartKey intotheignitio nlock, you
can carry outtwo more starting attempts.
Once youhave started theengine, youcan
swi tch the engine offvia you rsmartpho neatany
time.
You canonly start theengine viayou rsmart-
phone if:
R the SmartKey isin the ignitio nlock
R park position 005Dissele cted
R the accele ratorpedalis not depre ssed
R the alarm for the anti-theft alarm system is
not set
R the pani cala rm isnot activa ted
R the hazard warninglamp sare switched off
R the hood isclosed
R the doors areclosed andlocked
R the windo wsand sliding sunroof areclosed
Also make surethat:
R the fuel tank issuffi ciently filled
R the starter battery hasbeen sufficiently
charge d Drivi
ng
125Drivi ngand parking Z

Problem
Possible
causes/co nsequences and0050 0050
Solutions The
engine doesnot
start. Youcannot hear
the starter motor. The
on-board voltageistoo low because thebattery istoo weak or
discharged.
X Jump-start thevehicle (Ypage 282).
If the engine doesnotstart despite attemptsto jump-st artit:
X Consult aquali fiedspecialist workshop. The
starter motorwasexposed toathermal loadthatwastoohigh.
X Allow thestarter motortocool down forapproximately twominutes.
X Try tostart theengine again.
If the engine stilldoes notstart:
X Consult aquali fiedspecialist workshop. The
engine isnot running
smoothly andismisfir-
ing. There
isamalfunction inthe engine electron icsorinamechanical
componen tof the engine management system.
X Only depress theaccelerator pedalslightly.
Otherwise, non-combusted fuelmay getinto thecatalytic converter
and damage it.
X Have thecause rectified immediately ataqual ified specialist work-
shop. The
coolant temperature
gauge shows avalue
above 248‡(120 †).
The coolant warning
lamp mayalsobeon and
a warning tonemay
sound. The
coolant levelistoo low. Thecoolant istoo hotand theengine isno
longer beingcooled sufficiently.
X Stop assoon aspossible andallow theengine andthecoolant to
cool down.
X Check thecoolant level(Ypage 263). Observe thewarning notes
as you dosoand add coolant ifnecessary. Notes
ontowing vehicles
The vehicle isnot suitable forattaching towbar
systems, suchasthose usedforflat towing or
dinghy towing.
Att aching orusing towbarsystems mayresult in
damage tothe vehicle.
When towing avehicle withtowbarsystems,
safe driving characterist icscannot beguaran-
teed forthe towing vehicle orthe towed vehicle.
The vehicle/trailer combinationmayswerve.
Observe thepermissible towingmethods
(Y page 287)andthenotes ontowing withboth
axles onthe ground (Ypage 286). DYNAMIC
SELECTbutt on(all vehicle s
except Mercedes-AMG vehicles)
Use theDYNAMIC SELECTbutton tochange the
drive program. Depending onthe drive program
selected thefollowing vehiclecharacterist ics
will change:
R the drive (engine andtransmission manage-
ment)
R the suspension (vehicleswithdamping sys-
tem orAMG adaptive sportsuspension sys-
tem)
R the sound ofthe exhaust system(vehicles
with sports exhaust system)
R the steering
R the availa bilityofthe ECO start/ stopfunct ion
R the climate control
Each timeyoustart theengine withtheSmart-
Key orthe Start /Stopbutton, driveprogram Cis DY
NAMIC SELECTbutt on(all vehicl esexce ptMercedes-AMG vehicles)
129Driving andparking Z

away
carefully tocheck whet herthedesir ed
tr ans miss ionposit ioniseng aged. Ideally,you
shoul dselec ttr ans miss ionposit ion005Band
driv eprog ramEor S.
Engag ingpark posi tion P !
If
th eeng inespee dis toohigh ortheveh icle
is coas ting,do notshif tth eauto matictrans -
miss iondire ctly from 005Bto005E, from 005Eto005B
or dire ctly to 005D. Other wise, theauto matic
tr ans miss ionmay bedamage d.
X Push theDI RECT SELECT leve rswit chinthe
dire ction ofarr ow 005D.
Tran smis sion posit iondisplay 005Disshow nin
th emult ifunction display.
When youhave engaged parkposit ion005D, mak e
sure that thetrans miss ionposit iondisplay
show s005D inthemult ifunction display.
You canengage park position005Donlywhen the
veh icle isstatio nary;do notswit chdire ctly to
park position005Dathigh enginespee d.
De pres singth ebrak eand pushin gth eDI RECT
SE LECT leve rup ordown disengages thepark -
ing lock.The trans miss ionisin neut ral005C.
At trans miss ionfluid temper aturesbelow 00F84‡
(00F82 0†), you can onlyshif tout ofpark position
005D intoano ther trans miss ionposit ionwhen the
eng ineisrun ning.
In orde rto shif tfr om park position005Ddire ctly
int o005E or005B:
R depr essthebrak epedal and
R push theDI RECT SELECT leve rup ordown
past thefir st poin tof res istanc e
Engag ingpark posi tion Pau tom atically Park
position005Disauto matically engaged if:
R you switchoff theeng ineusin gth eSm artKey
and remove theSm artKey
R you switchoff theeng ineusin gth eSm artKey
or usin gth eSt art /S topbutt onand open the
driv er'sdoor orfron t-passe nger door
R you open thedriv er'sdoor when theveh icle is
st atio naryor when drivingataver ylow spee d
and thetrans miss ionisin posit ion005Bor005E
In cer tain situatio ns,th eauto matictrans mis-
sion shiftsauto matically totrans miss ionposi-
tio n005D ifth eHOL Dfun ction orActiveDis tan ce
As sist DISTRO NICisact ivat ed. Obse rveth e
inf orm ationon theHOL Dfun ction (Ypage 159) and
onActiveDis tan ceAssist DISTRO NIC
(Y page 155).
Engag ingreversegear R !
On
lymov eth eauto matictrans miss ionto
005E when theveh icle isstatio nary.
X De pres sth ebrak eand keep itpres sed.
X Push theDI RECT SELECT leve rup past the
fir st poin tof res istanc e.
The ECO start /stopfun ction isno tavailabl e
when revers egear iseng aged. Further inform a-
tio non theECO start /stopfun ction
(Y page 127).
Shif tingto neut ralN G
WAR
NING
If ch ildre nare left unsuperv isedintheveh icle,
th ey coul d:
R oper atetheveh icle'sequipm ent
Add ition ally, childre ncoul dset theveh icle in
mot ionif,for exam ple,they:
R rele ase thepark ingbrak e
R shif tth eauto matictrans miss ionout ofpark
posit ion005D
R start theeng ine
Ther eis arisk ofan acc iden tand injury.
Nev erleave childre nor anim alsunat tende din
th eveh icle.
When leavingth eveh icle,always taketh e
Sm artKey with youand lockth eveh icle.This
also applies fortheDig ital Vehi cleKey ifth e
"Dig italVehi cleKey" function isact ivat edvia
Mer cedesme connect.
X Ifth etrans miss ionisin posit ion005Bor005E:
push theDI RECT SELECT leve rup ordown to
th efir st poin tof res istanc e.
X Ifth etrans miss ionisin posit ion005D: depr ess
th ebrak epedal andpush theDI RECT SELECT
leve rup ordown tothefir st poin tof res ist-
anc e.
If you switchtheeng ineoffwith thetrans mis-
sion inposit ion005Eor005B, theauto matictrans -
miss ionshiftsto 005C auto matically.
Wit hth eSm artKey :if you then open thedriv -
er' sdoor orthefron t-passe nger door orrem ove 132
Aut
oma tictrans missionDriv ingand parking

Trans
mission pos ition s 0045 Park
position
Thi spre vents thevehiclefro mrol ling
aw ay when stop ped.
Onl yshi ftthe transmi ssion toposi-
tio n005D when the vehicleis sta tion-
ar y. The parkin glock sho uld not be
us ed asabra kewhen parkin g.
Alw aysap plythe electro nicparkin g
bra keinad ditio nto the parkin glock
in ord erto sec urethe vehicle.
In the eventofama lfunctio nof the
veh icle's electro nics,the transmi s-
si on maylo ck inpo sitio n005D. Have
the vehicleelectro nicschecked
imm ediatel yat aqu alifi ed speci alist
wo rksh op.
Pa rk positio n005D isau toma tically
eng aged if:
R yousw itch offthe engineusing the
Sma rtKeyand remove theSma rt-
Key
R yousw itch offthe engineusing the
Sma rtKeyor using the Star t/Stop
bu tton andopen the driver 'sdo or
or fro nt-pa ssenge rdo or
R youop en the driver 'sdo or wh en
the vehicleis sta tionar yor wh en
dri vin gat aver ylo w sp ee dand the
tra nsmi ssion isin po sitio n005B or
005E 0046 Rev
ersege ar
Onl yshi ftthe transmi ssion into posi-
tio n005E when the vehicleis sta tion-
ar y. 0044 Neu
tral
Do not shiftthe transmi ssion to005C
wh ile dri vin g.The automa tictrans-
mis sion cou ldothe rwise be dam-
ag ed .
No powe ris tra nsmi ttedfromthe
eng inetothe drive wheels.
Re leas ing the brakes willal lo w yo uto
mov ethe vehiclefre ely, e.g .to push
it or tow it.
If ESP ®
is de acti vated orfaulty: shift
the transmi ssion topo sitio n005C ifthe
veh icleis in da nge rof ski dding ,e.g .
on icy roads.
If yo usw itch theengineoffwith the
tra nsmi ssion inpo sitio n005E or005B,
the automa tictransmi ssion shifts to
005C automa tically.
! Co
asting inneu tral005C may
cau sedama getothe drive train. 003A Dri
ve
The automa tictransmi ssion cha nge s
ge ar automa tically. All forwa rdgears
ar eav ailabl e. Dri
ving tips
Ch ang ingge ar The
automa tictransmi ssion shifts thro ughthe
ind ividu alge arsau toma tically wh enitis in tra ns-
mis sion positio n005B. Thisau toma ticgear shi ft-
ing behavio ris de term inedby :
R the selecte ddri ve pro gram
R the positio nof the accelera tor pedal
R the roadsp ee d
Ac celerator pedalpos ition Yo
ur sty leof dri vin ginfl uences howtheauto-
ma tic transmi ssion shifts gear:
R little thro ttle:ea rly upshi fts
R mor ethro ttle:la te upshi fts 13
4 Au
tomati ctrans missionDr ivi ng andparki ng

Befor
ethe engi nespe edrea ches thered area,
an upshi ftindi cator willbe show nin the multi-
functi ondispl ay.
X Shift torecom mende dgea r0043 whe nmes-
sag e0044 isshow nin the multifunction displ ay.
Ki ckdo wn X
For maxi mum acceleration, dep ress the
acce lerator pedalbey ond thepressu repoi nt.
The automa tictransm ission shifts toalow er
gea rdep endi ngon the engi nespe ed.
X Shift back up once thedesiredspe edis
rea ched . Duri
ngkickdo wn,youcannot shiftgea rsusi ng
the stee ring wheelpa ddl eshi fters.
If yo uap plyful lthrottle ,the automa tictrans-
mis sionshi fts uptothe next gearwhe nthe
maxi mum enginespe edisrea ched .Thi spre -
vents theengi nefrom overrevvi ng.
Merc edes-AMG vehicle s: itis only possibleto
use kickdo wnintempo rarymanu aldri ve pro-
gra mM. Whe nmanu aldri ve prog ramMisper -
mane ntlyactivate d,kickdo wnisnot possible. Prob
lems with the transmis sion Prob
lem Pos
siblecaus es/c on sequen cesand 0050 0050
Sol utio ns The
transm ission has
prob lemsshi fting gear. The
transm ission islos ing oil.
X Have thetransm ission checke dat aqu alifi ed spe cialist wor kshop
imme diatel y. The
acce leration ability
is dete riorati ng.
The transm ission nolon-
ger shifts into allof the
gea rs.
Re vers egea rcan nolon-
ger beenga ged. The
transm ission isin eme rgency mode.
X Stop thevehi cle.
X Shift thetransm ission topos ition005D.
X Swi tch offthe engi ne.
X Wa itat lea stten seco ndsbefore resta rting theengi ne.
X Shift thetransm ission topos ition005B.
X Have thetransm ission checke dat aqu alifi ed spe cialist wor kshop
imme diatel y. Refue
ling Impo
rtant safetynotes G
WARNI
NG
Fue lis hig hly flammab le.Risk offire and
expl osion byimp rope rhand ling offue l. You
mustavo idfire ,ope nfla mes, smoki ng
and crea ting sparks. Switch offthe ignition
bef ore refu eling and ,if pre sent, switch offthe
au xiliary hea ting. G
WARNI
NG
Fue lis poi sonou sand haza rdousto hea lth.
The reisarisk ofinju ry. Refue
ling
139Drivin gand parking
Z