2019 MERCEDES-BENZ CLA COUPE check engine

Opening
thefuel filler flap 0043
Toopen thefuel filler flap
0044 Tire pressure table
0087 Toinsert thefuel filler cap
0085 Instruct ionlabel forfuel type tobe refueled
X Switc hoff the engine .
X Remove theSmart Keyfrom theignition lock.
or, invehicles withKEYLE SS-GO start -function
or KEYLE SS‑GO
X Open thedriver's door.
The vehicle electronics arenow inposition
005A. This isthe same asthe Smart Keyhaving
been removed.
X Press thefuel filler flapinthe direct ionof
arrow 0043.
The fuel filler flapswings up.
X Turn thefuel filler capcount er-clockwise and
remove it. X
Inser tthe fuel filler capinto theholder onthe
inside offuel filler flap0087.
X Completely insertthefiller neck ofthe fuel
pump nozzleinto thetank ,hook inplace and
refuel.
X Only fillthe tank untilthepump nozzle
switches off.
i Do
not add anymore fuelafter thepump
stops fillingforthe first time. Otherwise, fuel
may leakout.
Closing thefuel filler flap X
Replace thecap onthe filler neck andturn
clock wiseuntilitengages audibly.
X Close thefuel filler flap.
Close thefuel filler flapbefore lockingthe vehi-
cle.
If you aredriving withthefuel filler capopen, the
00B6 reserv efuel warning lampflashes. Ames-
sage appears inthe multifunc tiondisplay
(Y page 208).
In addition, the00B9 Check Engine warning
lamp maylight up(Ypage 226).
For furth erinfor mation onwarning andindicat or
lamps inthe instrument cluster,see
(Y page 226). Refueling
141Drivingandparking Z

helps
youtoavoid overheating thebrakes and
wearing themoutexcessively.
When youtake advantage ofengine braking, it
is possible thatadrive wheel willnotrotate for
some time,e.g.onaslippery roadsurface.
This could cause damage tothe drive train.
This type ofdamage isnot covered bythe
Mercedes-Ben zwarranty.
Briefly depressing theaccelerator pedalon
downhill gradients whilethemanual drivepro-
gram Mistemporarily activated:theautomatic
transmission mayswitch tothe last active auto-
matic driveprogram Eor S.The automatic trans-
mission mayshift toahigher gear.Thiscan
reduce theengine's brakingeffect.
Heavy andlight loads G
WARNING
If you rest your footonthe brake pedalwhile
driving, thebraking systemcanoverheat. This
increases thestopping distanceandcaneven
cause thebraking systemtofail. There isa
risk ofan accident.
Never usethebrake pedalasafootrest .Never
depress thebrake pedalandtheaccelerator
pedal atthe same time.
! Depressing
thebrake pedalconstantly
results inexcessive andpremature wearto
the brake pads.
If the brakes havebeen subjected toaheavy
load, donot stop thevehicle immediately. Drive
on for ashort while. Thisallow sthe airflow to
cool thebrakes morequickly.
Wet roads If
you have driven foralong time inheavy rain
without braking, theremaybeadelay edreac-
tion from thebrakes whenbraking forthe first
time. Thismay alsooccur afterthevehicle has
been washed ordriven through deepwater.
You have todepress thebrake pedalmore
firmly. Maintain agreater distance fromthe
vehicle infront .
Aft erdriving onawet road orhaving thevehicle
washed, brakefirmlywhilepayingattent ionto
the traffic conditions .This willwarm upthe
brake discs, thereby dryingthemmore quickly
and protect ingthem against corrosion. Limited
braking performanceonsalt-
treat edroads If
you drive onsalted roads, alaye rof salt resi-
due may form onthe brake discsandbrake
pads. Thiscanresult inasignificantly longer
braking distance.
R Inorder toprevent anysalt build -up,apply the
brakes occasionally whilepayingattent ionto
the traffic conditions .
R Carefull ydepress thebrake pedalandthe
beginning andend ofajourney.
R Maintain agreater distance tothe vehicle
ahead.
Servicing thebrakes !
The
brake fluidlevel maybetoo low, if:
R ifthe red brake warning lamplights upin
the instrumen tcluster and
R you hear awarning tonewhile theengine is
running
Observe additional warningmessages inthe
multifunction display.
The brake fluidlevel maybetoo low due to
brake padwear orleaking brakelines.
Have thebrake system checkedimmediately.
Consult aqual ified specialist workshop to
arrange this.
! A
funct ionorperformance testshould only
be carried outona2-axle dynamometer. If
you wish tooperate thevehicle onsuch a
dynamometer, pleaseconsult aqual ified spe-
cialist workshop inadvance. Youcould oth-
erwise damage thedrive trainorthe brake
system.
! As
the ESP ®
system operates automatically ,
the engine andtheignition mustbeswitched
off (the SmartKey mustbeinposition 0092or
0047 inthe ignition lock),ifthe electric parking
brake istested onabraking dynamometer
(maximum 10seconds).
Braking triggered automatically byESP ®
may
cause severe damage tothe brake system.
All check sand maintenanc ework onthe brake
system mustbecarried outataqual ified spe-
cialist workshop.
Have brake padsinstalled andbrake fluid
replaced ataqual ified specialist workshop. 148
Driving
tipsDriving andparking

If
the brake system hasonly been subject to
modera teload s,you shoul dtest thefunctional-
ity ofyou rbrakes atregul arintervals.
You canfind adescriptio nof Brake Assist (BAS)
on (Ypage 61).
Mercedes-Benz recommendsthatyouonly have
brake pads/linings installedon you rvehicle
which havebeen appro vedforMercedes-Benz
vehicle sor which correspond toan equi valent
qua litystandard. Brakepads/linings whichhave
not been appro vedforMercedes-Benz vehicles
or which arenot ofan equi valent qualitycould
affect yourvehicle 'sopera tingsafety.
Mercedes-Benz recommendsthatyouonly use
brake fluidthat hasbeen specia llyappro vedfor
you rvehicle byMercedes-Benz, orwhich corre-
sponds toan equi valent qualitystandard. Brake
flui dwhich hasnotbeen appro vedfor
Mercedes-Benz vehiclesor which isnot ofan
equi valent qualitycould affect yourvehicle 's
opera tingsafety.
Chec kingbrake liningthickne ss You
canmeasu rethe break pad/liningthick-
ness using atest gage .Colo r-coding (greenor
red) onthe test gage allows youtodetermine
whether thebrake pad/liningthickness isstill
sufficie nt.The test gage isin the vehicle docu-
ment walletinthe glove box. Front
wheel Rea
rwheel
X Bring thevehicle andwheel sinto asuita ble
positio nso that youcan attach testgage 0083.
X Secure thevehicle against rollingawa y
(Y page 142).
X Engage parkpositio nP.
X Switch offthe engine.
X Pla cetest gage 0083betwee nthe wheel 's
spokes onbrake pad/lining0087.
X Hold testgage 0083verticall yon brake disc0043
and slidemeasu ringpin0044onto brake
disc 0043.
X Check whichcolorfield0085the arrow on
measu ringpin0044ispointing to.
Green: thebrake pad/liningthickness issuf-
ficient.
Red: thebrake pad/liningthickness isnot
sufficie nt.Have thebrake pads/lining
checked ataqua lifiedspecia listworkshop.
To avoid aninaccurate measurement:
R make sureyoupositio nthe wheel ssuita bly
R do not putthemeasu ringpinonarecess in
the brake disc Drivin
gon wetroads
Hydroplaning If
the road surface iswet, hydro planing may
occur dependi ngon water level,speed andtire
tread depth. Drivi
ngtips
149Drivingand parking Z

Engine
Disp
laymes sages Possi
blecauses/cons equences and0050 0050
Solu tions 00BD
Che ck Che
ckCoo lant Coo
lantLev el Lev
el
See Operator'sMan ‐ See
Operator'sMan ‐
ual ual The
coolant levelis toolow.
! Av
oid longer journ eys when there isins ufficie ntcoo lant inthe
eng inecoo ling system. You couldot her wise damag eth eeng ine.
X Add coolant ,obse rving thewarn ingnotesbefo redoin gso
(Y page 263).
If you have toaddcoolan tfr equ ently:
X Con tacta qualifi edspec ialist workshop andhave theeng inecoo ling
syst emcheck ed. 00AC The
fanmot orismalf unctionin g.
X At coo lant temper aturesbelow 248‡( 120 †),drive tothe neare st
qua lified speci alist worksh op.
X Avoid heavyloa dson the engine asyou doso, e.g. drivi nginmoun-
tainou sterrai nand stop-and -gotraffic. 00AC
Coolan tToo Hot Coolan
tToo Hot
Stop Vehicl eTurn Stop
Vehicl eTurn
Engine Off Engine
Off The
coola ntistoo hot.
A wa rning tonealso sou nds.
G WARNING
Do not drive whenyou rengine isoverhe ated.Thiscancausesome
flu ids whichmay have leaked into theengine compartment tocatch
fire.
Steam fromtheoverhe atedengine canalso cau seseri ous burns which
can occur justbyopeni ngthe hood .
There isarisk ofinjury .
X Pul lover andstop thevehi clesafe lyand switch offthe engine, pay-
ing attention toroad andtraffic conditio ns.
X Secure thevehi cleaga inst rolling away (Y pag e142) .
X Wai tuntil theengine hascoole ddow n.
X Make surethattheairsup plytothe engine radiator isnot blocked,
e.g. bysnow, slush orice.
X Do not start theengine againuntil thedisp laymessa gegoes outand
the coola nttempera tureisbel ow 248 ‡(120 †).Otherw ise,the
engine couldbe dama ged.
X Pay attention tothe coola nttempera turedisplay.
If the temperature increase sagain :
X Visi ta qua lified speci alist worksh opimmed iately .
Under normal operatingconditio nsand with thespeci fiedcoola nt
leve l,the coola nttempera turemay riseto248 ‡(120 †). Di
splay messag es
207On-b oard comput erand displays Z

Warning/
indic ator
lamp 00510051
Sign altype
Poss iblecause s/cons equen cesand 0050 0050
Sol utions 00E5
0051
The yellow ESP®
war ning lamp flashes whilethe vehicl eis in motion.
ESP ®
or traction controlhasintervened becausethere isarisk ofskiddi ngorat
lea stone whee lhas started tospin.
Cru isecontrol orActive Distance AssistDISTRONIC isdea ctivated.
X When pulling away,only depre ssthe accele ratorpedalas far asnecessa ry.
X Ease offthe accele ratorpedalwhi lethe vehicl eis in motion.
X Adapt yourdrivi ngstyle tosui tthe road andweather conditions.
X Do not deactivate ESP®
.
In rare cases (Ypag e66) ,it may bebest todea ctivate ESP®
.
Observe theimpor tantsafety notesonESP ®
(Y pag e64). 00BB
0051
The yellow ESP®
OFF warning lamp islit whi lethe engine isrunning.
ESP ®
is dea ctivated. ESP®
wil lnot stabi lizethevehicl eif it starts toskid orifa
whee lstarts tospin.
G WARNING
If ESP ®
is swi tched off,ESP ®
is unab leto stabi lizethevehicl e.
Further drivingsystems ordrivi ngsafety systems arethus restricted.
There isan increas edrisk ofskiddi ngand anaccide nt.
X Rea ctivate ESP®
.
In rare cases (Ypag e66) ,it may bebest todea ctivate ESP®
.
Observe theimpor tantsafety notesonESP ®
(Y pag e64).
X Adapt yourdrivi ngstyle tosui tthe road andweather conditions.
If ESP ®
cannot beactiva ted:
X Drive oncarefu lly.
X Contact aqua lified speci alist worksho pand have ESP®
checked. 0074
0051
Mercede s-AMGvehiclesonly :
The yellow SPORT handlingmode warning lamp islit whi lethe engine isrunning.
SPORT handlingmode isactiva ted.
G WARNING
When SPORT handlingmode isswi tched on,ESP ®
is unab leto stabi lizethevehicl e.
There isan increas edrisk ofskiddi ngand anaccide nt.
X Only switch toSPORT handlingmode inaccorda ncewith theconditions descri-
bed inthe "Activating/d eactivatingESP®
" section (Ypag e66) . 224
Warning
andindic atorlamps inthe instrum entclusterOn-bo ardcomput erand displays

Warning/
indic ator
lamp 00510051
Sign altype
Poss iblecause s/cons equen cesand 0050 0050
Sol utions 00240049
0051
0049 (USAonly),0024 (Canada only):the red indica torlamp forthe electric
parki ngbrake flashes orlights upand/or theyellow warni nglamp forthe electric
parki ngbrake lights up.
X Observe theadditiona ldisp laymessa gesinthe multi function display. 0075
0051
The redrestrai ntsystem warning lamp islit whi lethe engine isrunning.
The restrai ntsystem ismalfu nctioning.
G WARNING
The airbag sor Emergency TensioningDevices mayeither betriggere duninten-
tional lyor, inthe event ofan accide nt,may notbetriggere d.
There isan increas edrisk ofinjury .
X Observe theadditiona ldisp laymessa gesinthe multi function display.
X Drive oncarefu lly.
X Contact aqua lified speci alist worksho pand have therestrai ntsystem checked.
For further informati onabo utthe restrai ntsystem, see(Ypag e40) . Eng
ine Warning/
indic ator
lamp 00510051
Sign altype
Poss iblecause s/cons equen cesand 0050 0050
Sol utions 00B9
0051
The yellow CheckEngine warning lamp lights upwhi lethe engine isrunning.
There maybeamalfu nction, forexampl e:
R in the engine management
R in the fuel injection system
R in the exhau stsystem
R in the ignitio nsystem
R in the fuel system
The emiss ionlimitvalu esmay beexceede dand theengine maybeinemerge ncy
mode.
X Visi ta qua lified speci alist worksho pimmed iately.
i In
some states, youmust immed iatelyvisit aqua lified speci alist worksho pas
soon asthe yellow CheckEngine warning lamp lights up. This isdue tothe lega l
requ ireme ntsineffect inthese states. Ifin dou bt,check whethe rsuch legal
regu lations applyin the state inwhi chyou arecurrently driving. 00D4
0051
The yellow reserve fuelwarning lamp lights upwhi lethe engine isrunning.
The fuel levelhas dropp edinto thereserve range.
X Refu elat the neares tgas station. 226
Warning
andindic atorlamps inthe instrum entclusterOn-bo ardcomput erand displays

Warning/
indic ator
lamp 00510051
Sign altype
Poss iblecause s/cons equen cesand 0050 0050
Sol utions 00D4
0051
The yellow reserve fuelwarning lamp flashes whilethe vehicl eis in motion.
In add ition, the00B9 CheckEngine warninglamp maylight up.
The fuel filler cap isnot closed correctly orthe fuel system islea king.
X Che ckthat thefuel filler cap iscorrectly closed.
X Ifthe fuel filler cap isnot correc tlyclosed: close thefuel filler cap.
X Ifthe fuel filler cap isclo sed: visitaqua lified speci alist worksho p. 00AC
0051
The redcoola ntwar ning lamp lights upwhi lethe engine isrunning andthe
coola nttempera turegage isat the start ofthe scale .
The tempera turesensor forthe coola nttempera turegaugeismalfu nctioning.
The coola nttempera tureisno longer being monitored .There isarisk ofengine
dama geifthe coola nttempera tureistoo high .
X Pul lover andstop thevehicl esafel yand switch offthe engine, paying attention
to road andtraffic conditions. Donot continue drivingunder anycircumsta nces.
X Secure thevehicl eaga inst rolling awa y(Y pag e142) .
X Consu ltaqua lified speci alist worksho p. Warning
andindic atorlamps inthe instrum entcluster
227On-boardcomput erand displays Z

Warning/
indic ator
lamp 00510051
Sign altype
Poss iblecause s/cons equen cesand 0050 0050
Sol utions 00AC
0051
The redcoola ntwar ning lamp comes onwhi lethe engine isrunning.
The coola ntleve lis too low.
If the coola ntleve lis correct, theairfl owtothe engine radiator may beblocked or
the electric engineradiator fanmay bedefective .
The coola ntistoo hotand theengine isno longer being coole dsuffi ciently .
X Observe theadditiona ldisp laymessa gesinthe multi function display.
X Pul lover andstop thevehicl esafel yand switch offthe engine, paying attention
to road andtraffic conditions.
X Secure thevehicl eaga inst rolling awa y(Y pag e142).
X Leave thevehicl eand keep asafe dista ncefrom thevehicl euntil theengine has
coole ddow n.
X Che ckthe coola ntleve land add coola nt,obser vingthewarni ngnotes
(Y pag e263).
X Ifyou have toadd coola ntfrequ ently, havetheengine coolingsystem checked.
X Make surethattheairsup plytothe engine radiator isnot blocked ,e.g. bysnow,
slu sh orice.
X Do not start theengine againuntil thecoola nttempera tureisbel ow 248 ‡
(120 †).Otherwi se,the engine couldbe dama ged.
X Drive tothe neares tqua lified speci alist worksho p.
X Avoid heavyloa dson the engine asyou doso, e.g. drivi nginmountai nousterrain
and stop-and-go traffic. 00AC
0051
The redcoola ntwar ning lamp comes onwhi lethe engine isrunning. Awarni ng
tone alsosound s.
The coola nttempera turehasexceede d248 ‡(120 †).The airflow tothe engine
radi ator may beblocked orthe coola ntleve lmay betoo low.
G WARNING
The engine isnot being coole dsuffi ciently andmay bedama ged.
Do not drive whenyou rengine isoverhe ated.Thiscancausesome fluids which
may have leaked into theengine compartment tocatch fire.
Steam fromtheoverhe atedengine canalso cau seseri ous burns whichcan occur
just byopeni ngthe hood .
There isarisk ofinjury .
X Obse rvethe additiona ldisp laymessa gesinthe multifunction displa y.
X Pul lover andstop thevehi clesafe lyand switch offthe engine, paying attention
to road andtraffic conditio ns.
X Secure thevehi cleaga inst rolling away (Y pag e142) .
X Leav ethe vehi cleand keep asafe dista ncefrom thevehi cleuntil theengine has
coole ddow n.
X Che ckthe coola ntleve land add coola nt,obse rving thewarning notes
(Y pag e263) .
X Ifyou have toadd coola ntfrequ ently, havetheengine coolingsys tem checked.
X Make surethattheairsup plytothe engine radiator isnot blocked, e.g.bysnow,
slu sh orice. 228
Warning
andindicator lamps inthe instrum entclusterOn-b oard comput erand displays