engine MERCEDES-BENZ C-CLASS CABRIOLET 2020 Owner's Guide

R
The position oftheaccelera torpeda l
R The driving speed Manual
gearshif ting &
WARNIN GRisk ofskid ding and ofan
acci dent dueto shif ting down onslipper y
ro ad sur faces
If yo ushif tdo wn onslipp eryro ad sur faces to
inc rease theengine braking effect, thedr ive
wheels maylose traction . #
Donotshif tdo wn onslipper yro ad sur‐
fa ces toinc rease theengine braking
ef fect. Whe
nth eaut omatic transmiss ionisshif tedto
position 005B,youcan man uallyshif tit wit hth e
st eer ing wheel gearshif tpaddle. Ifper mitted, the
aut omat ictransm issionshif tsto ahigh eror
lo we rge ar depen dingon thesteer ing wheel
ge arshif tpaddle beingpulled.
Yo uha ve twoop tio ns tomanua lly shif tth eaut o‐
matic transmiss ion:
R Temp orar yse tting
R Perm anen tse tting
The gearsshif taut omat icallywhen manualgear‐
shif tingis deac tivated.
Te mp oraryse tting: #
Toactiv ate: pul lst eer ing wheel gearshif t
paddle 1or2.
Man ualgearshif tingis act ivat ed fora shor t
time. Trans miss ionposit ion0063and thecur‐
re nt gear appear inthemultifunc tiondispla y.
% Howlong themanual gearshif tingst ay sacti‐
va tedis dependen ton various fact or s. Ma n‐
ua lshi fting can bedeact ivat ed aut omat ically
when chang ingthedr ive pr og ram, restar tin g
th eve hicle when thetransmission positionis
eng aged again 005Bordue tothedr iving style. #
Toshif tup: pull steer ing wheel gearshif t
paddle 2. #
Toshif tdo wn: pullsteer ing wheel gearshif t
paddle 1. #
Todeac tivate: pullst eer ing wheel gearshif t
paddle 2and hold itin place .
The transm issionposit ion005Bappear sin the
multifu nctiondisplay.
Pe rm anen tse tting: #
Cha ngeto drive pr og ram =(/ page14 4). #
Select drive se tting 0063(/ page14 4). Dr
iving and parking 14
7

Mer
cede s-AMG vehicl es:obse rveth eno tesin
th eSupplement .Ot her wise, youma yfa ilto rec‐
ogni zedangers. Gear
shiftrecomm endation Mer
cedes -AMG vehicl es:obse rveth eno tesin
th eSupplement .Ot her wise, youma yfa ilto rec‐
ogni zedangers.
The gearshif tre comme ndation assists youin
adop tingan eco nomic aldrivin gst yle. #
Ifge arshif tre comme ndation mess age1 is
sho wnonthemultifunc tiondispla y,shif tto
th ere comme ndedgear. Using
kickdow n Mer
cede s-AMG vehicl es:obse rveth eno tesin
th eSupplement .Ot her wise, youma yfa ilto rec‐
ogni zedangers. #
Maxi mum acceler atio n:dep ress theaccel‐
er ator pedal beyond thepr essur epoint .
The automatic transmiss ionshiftsup tothene xt
ge ar when themaximum enginespeedis
re ac hed toprotect theengine from overrev ving. Glide
mode functio n Mer
cede s-AMG vehicl es:obse rveth eno tesin
th eSupplement .Ot her wise, youma yno tre cog‐
nize dangers.
Wi th an ant icip ator ydr ivin gst yle, glide mode
helps youto reduce fuelconsum ption.
Glide mode isch aract erize dby thefo llo wing:
R The com bustion engin eis disco nnect edfrom
th edr ivet ra in and continues torunin neu tral .
R The trans mis sion positio n005B isdispl ayed in
gr een inthemultifunc tiondispla y. R
Vehicl eswith 48Von-b oard electrical
sy stem (EQ Boos tte ch nology): thecom‐
bus tion engine isswitc hedoff.All oftheve hi‐
cle funct ionsremain active.
Gli de mode isactiv ated ifth efo llo wing condi‐
tion sar eme t:
R Drive pr ogr am ; isse lect ed .
R The spee dis within asuit able rang e.
R The road's courseissuit able, e.g.no steep
uphill ordownhill inclinesortight bends.
R Youdo notdepr esstheaccelera toror brak e
peda l(e xc ep tfo rlig ht brak eapp lications).
% Glide mode canalsobe activ ated ifyo uha ve
select edthe"Eco" setting forth edr ive in the
dr ive pr og ram =.
Gli de mode isdea ctivated again ifone ofthe
condi tions isno long erme t.
Gl ide mod ecan also be preve nted bythefo llo w‐
ing parame ters:
R Incline
R Downhill gradi ent
R Temp eratur e 14
8
Driving and parking

R
Heig ht
R Spee d
R Ope rating status oftheengine
R Traf fic situ ation
% Glide mod ecan beende dby pressing a
st eer ing wheel gearshif tpaddle
(/ page14 7). Pr
obl ems with thetransm ission Pr
oblem
Possible causes/conseq uencesand0050 0050
Solutions
The transmission hasafa ulty gearshif t. The
transm issionis losin goil. #
Have thetra nsmiss ioncheckedat aqu alif ied spec ialistwo rkshop immediat ely.
The acceler ationcharact eristic sar e
de terior ating.
The transmission nolong ershif tsgear. The
transm issionis in emer gency operati on mod e.
It is only possi ble to shif tto one gear and reve rsege ar. #
Pull overand stop theve hicle safely assoon aspossible, paying attention toroad and traf fic condi tions. #
Swi tchth etra nsmiss iontoposition 005D. #
Switc hof fth eengine. #
Waitat leas tte nseco ndsbefore restar tin gth eengine. Dr
iving andparking 14
9

#
Iffuel comes intocont actwithyo ur
ey es, immediat elyrinse them thor‐
oughl ywit hclean water.Seek medical
att entio nimm ediately . #
Ifyo usw allo wfuel, seek medicalatten‐
tio nimm ediat ely. Do notind uce vomit‐
ing. #
Cha ngeimmedi ately out ofclo thing that
has com eint ocon tact with fuel . &
WARNIN GRisk offire or explosion from
elect rostatic charge
Ele ctrostat icch arge can crea te spar ksand
th er eb yignit efuel vapor s. #
Beforeopenin gth efuel filler cap ortak‐
ing holdof thepum pnoz zle, touc hth e
me tallic body oftheve hicle.
This dischargesan yelectr ostatic charge
th at ma yha ve built up. #
Donotge tint oth eve hicle again during
th ere fuel ingprocess.
Ot her wise,ele ctrostatic charge cou ld
bu ild up again. *
NO
TEDama gecau sed bythewr ong fuel Ve
hicles withaga soline engine:
Ev en small amounts ofthewr ong fuelcould
re sult indamag eto thefuel system, the
engine andtheemission control system. #
The RONrequ iremen tis locat edinthe
fuel filler flap. #
Onlyrefuel withlow- sulfur unleade d
fuel.
This fuelmaycont ainupto10%ethanol. Your
ve hicle issuit able foruse withE1 0fuel .
Ne verre fuel using anyof thefo llo wing fuels:
R Dies el
R Gasoline withmor eth an 10%ethanol by
vo lume, e.g.E15, E8 5,E100
R Gasoline withmor eth an 3% methano lby
vo lume, e.g.M15,M30 ,M85 ,M1 00
R Gasoline withadditiv escon tainin gme tal
If yo uacc iden tally refuel withth ewr ong fuel: #
Donotswitc hth eignition on. #
Consult aqu alif ied spec ialistwo rkshop. *
NO
TEDo notus ediese lto refuel vehi‐
cles withaga soline engine If
yo uha ve acc iden tally re fuel edwithth e
wr ong fuel:
R Donotswit chtheignition on.Other wise
fuel canentertheengine.
Ev en small amounts ofthewr ong fuel
could result indamag eto thefuel system
and theengine. Therepair costsarehigh. #
Consult aqu alif ied spec ialistwo rkshop. #
Have thefuel tank and fuellines
dr ained complet ely . *
NO
TEFuelma yspr ayout when you
re mo vethefuel pum pnoz zle #
Onlyfill th efuel tank unti lth epum p
noz zleswitc hesoff. Re
quirement s
R The vehicle isunloc ked(/ page65). Dr
iving andparking 15
1

ar
yve hicle withth ebr ak epedal applied
(/ page14 6). #
Switc hof fth eengine andtheignition by
pr essing button1. #
Release theser vice brak eslo wly. #
Getout oftheve hicle andlockit.
% When youpar kth eve hicle, youcan still
opera tetheside windo wsand thesof tto p
fo rapp roxima tely five minut esifth edr iver's
door isclosed. Gar
agedoor opener Pr
og rammin gbutt onsfo rthe garage doo r
ope ner &
DANG ER Risk deathcause dby exhaus t
ga ses
Combus tionengines emitpoisonous exhaus t
ga ses suchas carbon monoxide.Inhaling
th ese exhaus tga ses ishazar dous tohealt h
and leads topoisonin g. #
Neverlea vetheengine or,if pr esent ,
th eauxiliar yheating running inan encl
osedspa cewithout sufficie ntventi‐
la tio n. &
WARNIN GRisk ofinju rywhen opening
or clos ingadoor withth ega rage door
opener
When youoper ateor program thedoor with
th eint egr ated garage door opener ,people in
th era ng eof mo vement ofthedoor may
become trapped orstru ck bythedoor . #
When usingtheint egr ated garage door
opener ,alw aysmak esur eth at nobody
is wit hin thera ng eof mo vement ofthe
door . Onl
yoper ateth efo llo wing doorsusing the
ga rage door opener :
R Door swit hasaf etyst op and reve rsing fea‐
tur e.
R Doorswhic hcon form tothecur rent U.S.
sa fety standar ds.
Re quirement s: R
The vehicle hasbeen parkedoutside the
ga rage oroutside thera ng eof mo vement of
th edoor .
R The engine isswitc hedoff.
R The ignition isswitc hedon.
% The garage door opener function isalw ays
av ailable whentheignition isswitc hedon. 15
4
Driving and parking

#
Neverlea vechildr enunat tende din the
ve hicle. #
When leaving theve hicle, alwaysta ke
th eke ywit hyo uand lockth eve hicle. #
Keep theve hicle keyout ofreac hof
ch ildr en. The
elect ric pa rking brak eis applied ifth etra ns‐
mission isin position 005Dand one ofthefo llo w‐
ing con dition sis fulf illed:
R The engin eis switc hedoff.
R The seat belttongu eis no tins ertedin the
seat beltbuckleofthedr iver's seat andthe
dr iver's door isopened.
% Toprev ent application: pullthehandle ofthe
electr icpar king brak e.
In thefo llo wing situat ions,th eelectr icpar king
br ak eis also applied:
R ActiveDis tance AssistDIS TRONI Cis bring ing
th eve hicle toast ands till.
R The HOL Dfun ction iske eping theve hicle sta‐
tio nar y. R
ActivePa rking Assistis ke eping theve hicle
st atio nary.
This isthecase ifone ofthefo llo wing condition s
is also fulfilled:
R The engin eis switc hedoff.
R The seat belttongu eis no tins ertedin the
seat beltbuckleofthedr iver's seat andthe
dr iver's door isopened.
R Ther eis asy stem malfunct ion.
R The powe rsupp lyis insuf ficie nt.
R The vehicle isstatio naryfo ra lengt hyper iod.
When theelectr icpar king brak eis applied, the
re d0049 (USA)or0024 (Canada) indicatorlam p
appear sin theins trument cluster.
The electr icpar king brak eis no taut omaticall y
applied ifth eengine isswitc hedoffby theEC O
st ar t/ stop funct ion. Electr
icpar king brak efunction (releasing
aut omat ically)
The electr icpar king brak eis released whenthe
fo llo wing condition sar efulf illed:
R The driver's door isclos ed.
R The engin eis running .
R Vehicl eswith automatic transmiss ion:
The transmis sionisin posi tion 005Bor005E and
yo udepr esstheaccelera torpeda lor you
shif tfr om transmission position005Dto005B or
005E when onleve lgr ou nd withth edr iver's
door closed.
R Ifth etransmission isin position 005E,the
tr unk lid mu stbe closed.
R The seat belttongu eis ins ertedint oth eseat
belt buckleofthedr iver's seat.
Ve hicles withaut omatic transmission: ifth eseat
belt tongu eis no tins ertedint oth eseat belt
buc kleofthedr iver's seat, thefo llo wing condi‐
tion smus tbe fulf illed:
R Youshif tfr om transm issionposi tion005D.
R Youha ve prev iousl ydr iven atspeeds grea ter
th an 2mp h(3 km/h). Dr
iving andparking 15
9

R
theAT A(anti-t heftal ar m system) isno tav ail‐
able.
R thefunc tion forde tecting damag eon a
pa rked vehicle isno tav ailable.
If th efo llo wing condition sar efulf illed, standb y
mode canbeact ivat ed ordeac tivated usin gth e
multime diasystem:
R theengine isswitc hedoff.
R theignition isswitc hedon.
Ex ceeding theve hicle's displayednon -opera ‐
tion altime maycause inconvenie nce, i.e.it can‐
no tbe guarant eedth at thest ar terbatt erywil l
re liabl yst ar tth eengine.
The star terbatt erymus tbe charge dfirs tin the
fo llo wing situat ions:
R The vehicle's non-oper ational timemustbe
ex tende d.
R The Batte ryCh arg eInsu fficie ntfor Stand by
Mod emes sage appear sin themedia display.
% Standb ymode isaut omat icallydeac tivated
when theignition isswitc hedon. Ac
tiv atin g/deac tivatin gst andb ymode
Mul timedi asy stem:
4 Vehicle 5
î Vehicle Setting s
5 Standby Mode
% This function isno tav ailable forall model s. #
Activate0073 ordeacti vate 0053 thefunc tion.
When youact ivat eth efunc tion,a pr om pt
appear s. #
Select Yes.
St andb ymode isact ivat ed. Dr
iving anddriving safetysy stems Dr
iving systems andyour responsibility Yo
ur vehicle iseq uipped withdr iving systems
whic hassis tyo uin drivin g,par kingand man eu‐
ve ring theve hicle. Thedriving systems areaids
and donotre lie ve youof your responsibili typer‐
ta inin gto road traf fic law. Payatt ention tothe
tr af fic condi tions atalltime sand interve ne
wh en nece ssary.Be awareof thelimit ations
re ga rding thesaf euse ofthese systems. Inf
ormat iononradar and ultrasonic senso rs Some
drivi ng and drivi ng safety systems use
ra dar orultr asonic sensorsto monit orthear ea
in front of,behind ornext to theve hicle (depend‐
ing ontheve hicle's equipment).
Depending ontheve hicle's equipment, thera dar
sensor sar eint egr ated behind thebum pers
and/or behindtheMer cedes star .The ultrason ic
sen sorsar eloc ated inthefront and rear bum p‐
er s. Ke ep these partsfree ofdir t,ice and slush
(/ page362). Thesensor smus tno tbe cov‐
er ed, forex am ple bybicy clerack s, ove rhang ing
loads, sticke rs,fo ilor foils toprotect agains t
st one chipping .Ad dition allicens eplat ebr ac kets
can like wise impair thefunc tion oftheultr asonic
sensor s.In theev ent ofdamag eto thebum pers
or radiat orgrill, orfollo wing acollis ionimpact ing
th ebum persor radiat orgrill, have thefunc tion
of thesensor sch eckedat aqu alif ied spec ialist
wo rkshop. Ifth esensor sar edamag ed,some
dr iving systems anddriving safetysy stems may
no long erfunc tion proper ly. Dr
iving and parking 16
1

Ov
ervie wof driving systems anddriving
saf etysy stems In
this sect ion, youwill find informa tionab ou t
th efo llo wing drivin gsy stems anddriving safety
sy stems:
R 360° Camer a(/ page19 9)
R ABS (Anti-loc kBrak ingSyst em)
(/ page16 2)
R ActiveDis tance AssistDIS TRONI C
(/ page 174)
R AIRMA TIC(/ page18 8)
R ActiveBr ak eAssi st(/ pag e16 6)
R ActiveLa ne Keeping Assist(/ page21 5)
R ATTENTION ASSIST(/ page208)
R BAS(Bra keAssis tSyst em) (/page16 3)
R HillSt artAs sis t(/ page18 6)
R DYNA MIC BODY CONTR OL(/ page18 8)
R EBD (El ectr onicBra keforc eDis tribution)
(/ page16 6)
R ESP ®
(El ectr onic Stability Program)
(/ page16 3) R
ESP ®
Cr ossw indAssis t(/ page16 6)
R ActiveSpe edLimi tAssi st(/ pag e17 8)
R HOLD functio n(/ page 187)
R STEER CONTR OL(/ page 166)
R ActiveSt eer ing Assis twit hre scue lanefunc‐
tion (/page18 0)
R ActiveEmerg encyStop Assis t(/ page18 4)
R ActivePa rking Assist(/ page202 )
R Parking AssistPA RK TRONI C(/ pag e19 1)
R Rear vie wcam era(/ page19 7)
R ActiveLa ne Chang eAssi st(/ pag e18 2)
R Cruis econtr ol(/ page 172)
R Blind SpotAssis tand ActiveBli nd Spo tAssi st
wit hex itwa rning (/ page21 2)
R Traf fic Sign Assist(/ pag e21 0) Fu
nction ofABS The
Anti-loc kBr ak eSy stem (ABS )re gulat esthe
br ak epr essur ein critical driving situation s:
R Dur ing braking, e.g.atfull brak eapplication
or insuf ficie nttiretracti on, thewheels are
pr eve nted from lock ing.
R Vehicle steer ability whilebraking isensur ed.
If ABS interve nes when braki ng, youwill feel a
pulsing inthebr ak epedal. Thepulsating brak e
pedal canbeanindicat ionofhazar dous road
con dition sand canserveas are minder totake
ex tra car ewh ile dr ivi ng.
Sy stem limit s
R ABSis act ive from speeds ofappr ox.5 mp h
(8 km/ h).
R ABSma ybe impair edorma yno tfunc tion ifa
malfunc tionhasoccurredand theye l‐
lo w 0025 ABSwa rning lam plight sup con tin‐
uousl yin theins trument clusteraf te rth e
engine isstar ted. 16
2
Driving and parking

Fu
nction ofBA S(Br akeAssis tSy stem) &
WARNIN GRisk ofan acci dent caused by
a malf unctionin BA S(Br akeAssi stSys‐
te m)
If BA Sis mal functi oning,th ebr aking distance
in an eme rgency braki ng situa tionis
incr eased . #
Dep ress thebr ak epedal withfull forc e
in emer gency braki ng situa tions. ABS
pr eve nts thewheels from locking . BA
Ssu ppo rts yo ur eme rgency braking situation
wit hadditional brak efo rc e.
If yo udepr essthebr ak epedal quickl y, BA Sis
acti vated:
R BASau tomatical lyboos tsthebr ak epr es‐
sur e.
R BAScan shorten thebr aking distance.
R ABS preve nts thewheels from locking .
The brak es will func tion asusual onceyo u
re lease thebr ak epedal. BASis dea ctivated. Fu
nction ofESP ®
(Electr onicStabil ityPro‐
gr am) &
WARNIN GRisk ofskid ding ifESP ®
is
mal functi oning
If ESP ®
is mal functi oning,ESP ®
canno tcar ry
out vehicle stabiliz ation.Inaddit ion,ot her
dr iving safetysy stems areswitc hedoff. #
Drive on car efull y. #
Have ESP ®
ch eckedat aqu alif ied spe‐
cialis two rkshop. &
WARNIN GRisk ofskid ding ifESP ®
is
dea ctivated
If yo udeac tivateES P®
,ES P®
can notcar ry
out vehicle stabiliz ation. #
ESP®
shoul don lybe deactiv ated inthe
fo llo wing situat ions. Mer
cedes‑AM Gve hicl es:besur eto obser ve
th eno tesin theSupplement .Ot her wise, you
ma yfa ilto recogni zedangers. ESP
®
can moni torand improve driving stabilit y
and tract ion inthefo llo wing situat ions,wit hin
ph ysical limit s:
R When pulling away on wetor slip pe ry road‐
wa ys.
R When braking.
R Instro ng side winds from approx .50 mph
(80 km/ h).
If th eve hicle deviat esfrom thedir ect ion desir ed
by thedr iver ,ES P®
can stabiliz eth eve hicle by
int erve ning inthefo llo wing ways:
R One ormor ewheels arebr ak ed.
R The engine outputisadap tedaccor dingto
th esituation .
ES P®
is deactiv ated ifth e00BB ESP®
OFF warn‐
ing lam plight sup con tinuousl yin theins trument
clus ter:
R Driving stabilit ywill nolongerbe improve d.
R Crosswind Assistis no long eractiv e.
R The drive wheels couldspin.
R ETS/4 ETStra ction control isstill act ive. Dr
ivin gand parking16
3

1
Cruise contro lis selec ted
2 Spee dis save d, cruise control isdeactiv ated
3 Speed issave d, cruise control isactiv ated
% The segmen tsbetween thestor ed speed and
th eend ofthesegment displaylight upin
th espeedome ter.
Sy stem limit s
Cr uise control ma ybe unable tomaint ainthe
st or ed speed onuphill gradients. Thestor ed
speed isresumed whenthegr adient evensout.
Ch ang eint oalowe rge ar ingood timeon long
and steep downhill gradients. Take par ticular
no te ofthis when drivin galaden vehicle. By doing
so,youwill mak euse ofthebr aking effect
of theengine. Thisrelie vesth eload onthebr ak e
sy stem and preve nts thebr ak es from overheat‐
ing and wearing tooqu ickl y.
Do notus ecr uise contr olinthefo llo wing situa‐
tion s:
R Intraf fic situ ations whichrequ ire freq uent
ch ang esofspee d,e.g .in hea vytraf fic, on
wi nding roads.
R Onslippe ryroads. Accel erati ng can cause
th edr ive wheels tolose tract ion and the
ve hicle could then skid.
R Ifyo uar edr ivin gwhen visibilit yis poor .
Ope ratin gcr uis eco ntr ol &
WARNIN GRisk ofacci dent dueto stor ed
speed
If yo ucall upthestor ed speed andthis is
lo we rth an your cur rent spe ed,th eve hicle
deceler ates. #
Take intoacc ount thetra ffic situat ion
bef orecallin gup thestor ed speed. Re
quirement s:
R ESP®
mus tbe act ivat ed, but notint erve ning .
R The driven spe edisat leas t15 mp h
(20 km/ h).
R The transmis sionisin positio n005B. #
Toactiv atecr uise contr ol: press rock er
switc h1 up. Dr
iving andparking 17
3