2019 MERCEDES-BENZ CLA COUPE engine overheat

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

For
this reason, inthe event ofhea vyrainor in
condi tions inwhi chhydrop laning mayoccur ,
yo umus tdri ve inthe follow ing manne r:
R low eryour spe ed
R avo idruts
R avo idsud den steer ingmove ments
R bra kecare fully
Dri vin gon floode droads !
Do
not drive throu ghfloode dare as. Che ck
the depthofany water befo redri ving throu gh
it. Drive slowlythrou ghstand ingwater. Oth-
erw ise,wa ter cou ldenter thevehi cleinteri or
or engi necompa rtment. Itcan then damag e
the engi ne's orautoma tictransmi ssion's
ele ctronic components.Itcan also be sucke d
in by the engi ne's airintake connectio nand
cau seengi nedamag e. Win
terdrivi ng G
WARNI
NG
If yo ushi ftdow non asli ppe ryroa dsur face in
an attemp tto increa sethe engi ne's braking
effe ct,the drive whe elscou ldlos ethei rgri p.
The reisan increa seddanger ofskid ding and
acci dents.
Do not shiftdow nfor additi onal enginebra k-
ing onasli ppe ryroa dsur face . G
DA
NGER
If the exha ustpipeis blo cked oradequ ate
ventil ation isnot possible, poi sonou sga ses
such ascarb onmonoxi de(CO) may enter the
vehi cle. Thisis the case ,e.g. ifthe vehi cle
beco mestrapped insnow .The reisarisk of
fata linjur y.
If yo ulea vethe engi neorthe auxili ary hea ting
runni ng,make surethe exha ustpipeand area
aro und thevehi cleare clea rof snow .To
ensu rean adequ atesupplyoffresh air, ope na
wi ndow onthe sideof the vehi clethat isnot
faci nginto thewind.
Have your vehi clewinter-pro ofedataqu alifi ed
spe cialist wor kshop atthe onset ofwinter. Drive
particu larly care fullyon slippe ryroa dsur -
face s.Avoid sudden acce leration, steer ingand
bra king mane uvers.Do not use cruisecontrol or
Active DistanceAssistDISTR ONIC.
If the vehi clethrea tenstoskid orcannot be
stopp edwhe nmovi ngatlow speed:
X Shift thetransmi ssion topos ition005C.
X Try tobring the vehi cleund ercontrol using
corre ctive steering.
The outsid etempe ratureindi cator isnot
des igne dto serve asan ice-w arningdevi ceand
is there foreunsu itable forthat purpos e.
Cha nges inthe outsid etempe ratureare dis-
pla yedafte ra shor tdel ay.
Indi cated tempe raturesjust above thefree zing
poi ntdo not guara ntee thattheroadsur face is
free ofice. The roadmay stillbe icy,esp ecia lly in
woo ded areasoron bridge s.
You shou ldpa yspe cialattenti ontoroa dcondi -
tions whentempe raturesare around freezing
poi nt.
For more informationondriving with snow
chai ns,see (Ypage 293).
For more informationondriving with sum mer
tires ,see (Ypage 292 ).
Obs erve thenotes inthe "Winter operation" sec-
tion (Ypage 292 ). Dri
vin gsys tems Crui
secontrol
Gen eral notes Cru
isecontrol maintains aconsta ntroa dspe ed
for you. Itbra kes automa tically in orde rto avo id
excee dingthesetspeed. Onlong andsteep
dow nhillgra dients, especia lly if the vehi cleis
la den, youmus tsel ect alow gearin goo dtime.
You need toshi ftmanu ally usi ng the steer ing
whe elpa ddl eshi fters beforeha nd.Bydoing so,
yo uwi llmake useofthe braking effectof the
engi ne.Thisrel iev es the loadon the brakesys-
tem andprevents thebrakes from overheating
and wearing too quickly .
Whe nthe engi neisrunni ng,youcan usethe
crui secontrol leverto limit the speedtoany
spe edbetw een20mph (30km/h )and thetech-
nica lly per mitted maximum speedofthe vehi cle.
Use cruisecontrol ifroa dand traffi ccondi tions
make itap prop riate to mai ntain astea dyspe ed
for aprol onge dper iod. 150
Dri
vin gsys temsDrivin gand parking

There
isashort delay before achange inoutside
temperat ureappears inthe multifunct iondis-
play. Coolant
temperaturegauge G
WARNIN
G
Opening thehood when theengine isover-
heated orwhen thereisafire inthe engine
compart mentcould expose youtohot gases
or other service products. Thereisarisk of
injury.
Let anoverheated enginecooldown before
opening thehood. Ifthere isafire inthe
engine compart ment,keep thehood closed
and cont actthe fire department . !
A
display message isshown ifthe coolant
temperat ureistoo high.
If the coolant temperat ureisover 248‡
(120 †),donot cont inue driving. Theengine
will otherwise bedamaged.
The coolant temperat uregage isin the instr u-
ment cluster onthe right- hand side(Ypage 33).
The Hmarking inthe coolant temperat uregauge
correspon dstoacoolant temperat ureof
approximately 248‡(120 †).
Under normal operating conditionsandatthe
correc tcoolant level,thecoolant temperat ure
gauge mayrisetothe Hmarking. Opera
tingtheon-board computer
Overview 0043
Multifunct iondisplay
0044 Right controlpanel
0087 Left controlpanel
X To activat ethe on-board computer:turn theSmart Keytoposition 0047inthe ignition lock.
You cancont rolthe multifunct iondisplay andthesettings inthe on-board computer usingthe
button son the multifunct ionsteerin gwheel. Displays
andoperat ion
179On-board computerand display s Z