MERCEDES-BENZ C-CLASS CABRIOLET 2021 Owner's Manual

R
The engine andtransmission areat nor mal
oper ating temp eratur e.
* NO
TEIncr eased weardue tooptimized
acceler ation When
pulling away wit hop tim ized acceler a‐
tio n,all com ponentsof thedr ivet ra in are
subje cted toave ry high load.
This canlead toinc reased component wear. #
Donotalw ayspull away wit hop tim ized
acc eleration. #
Engage the005B drive position (/page13 8). #
Movethesteer ing wheel tothest ra ight -
ahead position. #
Selec tth espor tiestav ailable drive pr ogram
B orC(/ page13 5). #
Deactiv ateESP ®
(/ page15 4). #
Depr essand hold thebr ak epedal firm lywith
yo ur leftfo ot . #
With your right foot ,full ydepr esstheaccel‐
er ator pedal. #
Afterno mor eth an five seconds, take your
lef tfo ot quickl yof fth ebr ak e, but keep the
acc elerat orpedal depresse d.
The vehicle pullsaway atmax imum acceler a‐
tio n. #
Swit chon ESP ®
once theaccelera tionproce‐
dur eis com plete.
Endin gop tim ized acceler ation #
Remo veyour foot from theacceler ator pedal. #
React ivat eth eES P®
.
% Afteryo upull away wit hop tim ized accelera‐
tio n,com ponentsof thedr ivet ra in can
becom eve ry hot,whic hmeans that opti‐
miz edacc eleration values maybe reac hed
ag ain onlyafte ra fe w min utes. No
teson driving &
WARNIN GRisk ofacci dent dueto
object sin thedr iver's foot we ll
Obj ectsin thedr iver's foot we llma yim pede
pedal trav el or bloc kadepr essed pedal. This
jeopar dizestheoper ating androad
saf etyof theve hicle. #
Stow allobj ect sin theve hicle secur ely
so that they canno tget intoth edr iver's
fo ot we ll. #
Alw aysins tallth efloor mats securely
and asprescr ibed inorder toensur e
th at ther eis alw ayssuf ficie ntroom for
th epedals. #
Donotuse loose floor mats anddonot
place floor mats ontopof one another. &
WARNIN GRisk ofacci dent dueto inc or‐
re ct foot we ar
In cor rect foot we arinc ludes, forex am ple:
R Shoes withplat form soles
R Shoes withhigh heels
R Slipper s #
Alw ayswe arsuit able foot we arso that
yo ucan operat eth epedals safely. Dr
iving and parking 12
9

&
WARNIN GRisk ofacci dent ifth eignition
is switc hedoffwhile driving
If yo uswit choffth eignition whiledriving,
saf etyfun ction sar ere strict ed orno long er
av ailable.
Yo uwill need touse considerably morefo rc e
to steer and brak e, forex am ple. #
Donotswit choffth eignition whiledriv‐
ing. &
DANG ER Risk ofdeat hcause dby
ex haus tga 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 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. &
DANG ER Risk offata linj urydue topoi‐
sonous exhaus tga ses
If th eta ilpipe isbloc kedor suf ficie ntventil a‐
tio nis no tpo ssi ble, po isonou sex haus tga ses
suc has carbon monoxidemayent ertheve hi‐
cle. This isthecase when theve hicle
becomes stuc kin snow ,fo rex am ple. #
Keep theta ilpipe andthear ea around
th eve hicle free from snowwhen the
engine orthest atio naryheat erareru n‐
ning . #
Ope nawi ndo won theside oftheve hi‐
cle facing away from thewind toensur e
an adeq uatesupply offresh air. &
WARNIN GRisk ofacci dent andinjury
due tobeing under theinf luence ofalco‐
hol and drugs while driving
Dr inkin gand driving and/or taking drug sand
dr ivi ng areve ry dang erous combin ations.
Ev en asmall amount ofalcohol ordrugs can
af fect your reflex es, percep tion sand judg‐
ment .
The possibility ofaser ious oreve nfa ta lacc i‐
dent aregr eatl yinc reased when youdr ink or
ta ke drugs and drive. #
Donotdr ink ortake drugs and drive or
allo wan yone todrive who hasbeen
dr ink ing ortaking drug s. 13
0
Driving and parking

&
WARNIN GRisk ofacci dent dueto the
br ak esy stem overheating
If yo ulea veyour foot on thebr ak epedal
when driving, thebr ak esy stem mayov er‐
heat.
This increases thebr aking distance and the
br ak esy stem mayeve nfa il. #
Neveruse thebr ak epedal asafo ot re st. #
Donotde press thebr ak epedal andthe
acc elerat orpedal atthesame time
while driving. *
NO
TEEngi nedama gedue toexcess ively
hig hengi nespe eds The
enginewillbe damag edifyo udr ive wit h
th eengine intheov errevving rang e. #
Donotdr ive wi th theengine intheove r‐
re vving rang e. *
NO
TEWearing out thebr ak elinings by
continu ously dep ressing thebr ak epedal #
Donotdepr essthebr ak epedal contin‐
uousl ywhils tdr iving. #
Touse thebr aking effect of theengine,
shif tto alowe rge ar ingood time. *
NO
TEDama getothedr ivet ra in and
engin ewhen pulling away #
Donotwa rm uptheengine whilethe
ve hicle isstatio nary.Pull away immed i‐
at ely. #
Avoid high engine speeds anddriving at
full thro ttle untilth eengine hasreac hed
its operatin gte mp eratur e. *
NO
TEDama getothecat alytic converter
due tonon-co mbusted fuel The
engine isno tru nning smoothly and is
misf iring.
Non-c ombus tedfuel mayge tint oth ecat a‐
lyt iccon verter . #
Onlydepr esstheaccelera torpeda l
slig htly. #
Have thecause rectif ied imme diat ely at
a qu alif ied spec ialistwo rkshop. No
teson driving onsalt- treat edroads
The braking effect islimit edon salt-tr eated
ro ads.
Ther efor e, obse rveth efo llo wing notes:
R Due tosalt build-up onthebr ak ediscs and
br ak epads, thebr aking distance canincrease
consi derablyor result inbraking onlyon one
side
R Maint ainamuc hgr eat ersaf edis tance tothe
ve hicle infront
To remo vesalt build-up:
R Brak eoccasionall ywhile paying attention to
th etra ffic con dition s
R Carefull ydepr essthebr ak epedal attheend
of thejour neyand when star tin gth ene xt
jour ney Dr
iving andparking 13
1

No
teson hydropl aning
Hyd roplaning cantake place onceacer tain
amount ofwa terhas accumu lated on thero ad
sur face.
Obs erve thefo llo wing notesdur ing heavyprecip‐
it ation orinconditions inwhic hhy droplaning
ma yocc ur:
R Reduce speed
R Avoid tireru ts
R Avoid sudden steer ing movements
R Brak ecar eful ly
% Also obser vetheno teson regular lych ecking
wheels andtires (/ page35 4).
No teson driving through wateron the road
sur face
Wa terwhi chhas entered intoth eve hicle can
damag eth eengine, electricsand transmission .
Wa tercan alsoent ertheair intakeof theengine
and cause engine damage. Obser
vethefo llo wing ifyo umus tdr ive th ro ugh
wa ter:
R The water,when calm,ma yonl yre ac hth e
lo we redg eof theve hicle body.
R Drive at amaximum speedof6mp h
(1 0 km/ h);watercan other wise enterthe
ve hicle interior orengine compartment .
R Vehicles trave ling infront ,or onc omin gve hi‐
cles, cancreat ewav eswhic hma yex ceed the
maximu mper missi bledep thofthewa ter.
The braking effect of thebr ak es isreduced afte r
fo rd ing. Brak ecar efull ywhile paying attent ion to
th etraf fic condi tions untilbr aki ng powe rhas
been fullyrestor ed. ECO
star t/s topfunc tion Ope
ratio nof the ECOstar t/s topfunc tion
% The ECOstar t/ stop funct ionisno tav ailable
in all drive pr og rams, depe nding onthe
engine. Observethest atus displa yin the
multifu nctiondisplay fo rth is. The
engin eis switc hedoffaut omat icallyin the
fo llo wing situat ionsifall vehicle conditions for
an aut omat iceng inestop areme t:
R Youbr ak eth eve hicle toast ands tillin trans ‐
miss ionposit ion005Bor005C.
R Vehicl eswith a48 Von-b oard electrical
sy stem: Youdepr essthebr ak epedal when
tra veling atalow speed.
If th esy stem has detected one ofthefo llo wing
situat ions,th eengine willnotst op:
R Youstop atast op sign andther eis no vehi‐
cle infront ofyou.
R The vehicle that stopped infront ofyou
st ar ts up again.
R Youman euver,tur nth esteer ing wheel
shar plyor eng agere ve rsege ar.
% Ifth esy stem detects anintellige nt stop
inhibit or,fo rex am ple, ast op sign, theengine
will notst op.
If yo uact ivat eth eHOLD function oreng age
th epar kposition 005D,theengine canbe
switc hedoffin spit eof an intellig entstop
inhibit or. 13
2
Driving and parking

The
engine isrestar tedaut omatic allyif:
R Youen gage trans missi on positio n005B or005E.
R Youdepr esstheacceler ator pedal.
R Youopen orclo sethesof tto p.
R Anautomatic enginest ar tis requ ired bythe
ve hicle.
R Youre lease thebr ak epedal.
R Vehicl eswith a48 Von-b oardele ctrical
sy stem:
- Youre lease thebr ak epedal onado wnhill
gr adient andtheve hicle does notro ll.
- The vehicle rolls on ado wnhill gradien t
and does notaut omat icallyent erglide
mode at15 mp h(2 0km/h).
EC Ostar t/ stop funct ionsymbols inthemulti‐
func tion displa y:
R The 00D6 symbol (green) appear swhen the
ve hicle isat ast ands till:th eengine was
switc hedoffby theEC Ostar t/ stop funct ion.
R The 00D5 symbol (yello w)appear swhen the
ve hicle isat ast ands till:no tall vehicle condi‐
tions foran engine stop have been met. R
Neit herthe00D6 nor00D5 symbol appears
when theve hicle isat ast ands till:an intelli‐
ge nt stop inhibit orwa sde tected, forex am‐
ple, ast op sign.
If th eengine wasswitc hedoffby theEC Ostar t/
st op funct ionand youlea vetheve hicle, awa rn‐
ing tone sou nds and theengine isno tre star ted.
In addition, thefo llo wing displa ymess age
appear sin themultifunc tiondispla y:
Vehicle ReadytoDrive Switchthe Ignit ionOff
Befor eEx iting
If yo udo notswit choffth eignition ,it is aut o‐
maticall yswitc hedoffaf te rth re eminut es. Deactiv
atingoractiv ating theECO star t/
sto pfunc tion #
Press button 1.
If indi catorlamp 2light sup, theEC Ostar t/
st op funct ionisactiv ated.
% Depending onthemodel andtheve hicle
eq uipment, thebutt onmayalso belocat ed
at adif fere nt positio nin thecent ercon sole. Dr
iving andparking 13
3

ECO
displayfun ction The
ECOdispla ysumm arize syo ur drivin gch ar‐
act eristic sfrom thest ar tof thejour neyto its
com pletion andassis tsyouin achie vingth e
mos teconomical driving style.
Yo ucan influen ceconsum ption bydoing thefo l‐
lo wing:
R Drivin gwit hpar ticular care
R Drivin gth eve hicle indrive pr ogr am ;
R Obser vingthege arshif tre comme ndations The
inner segment willlight upand theout er
segment willfill up when thefo llo wing drivin g
st yle is adop ted:
R 1 Moder ateaccelera tion
R 2 Gentle deceler ationandrolling
R 3 Consis tent spe ed
The inne rseg ment willno tlight upand theout er
segment willemptywhen thefo llo wing drivin g
st yle is adop ted:
R 1 Spor tyacceler ation
R 2 Hea vybraking
R 3 Fluct uations inspeed
The ECOdispla ywill showyo uwhen youha ve
dr iven econ omicall y:
R The thre eout ersegment sar ecom pletely fil‐
led simult aneousl y.
R The ECOdispla ylights up.
The additional rang eac hieve das are sult ofyour
dr ivin gst yle in com parison withadr iver wit ha
ve ry spor tydriving style is sho wnunder Bonus fr.
Start. The rang edispl ayed does notindicat ea
fi xe dre duction incon sum ption. DY
NA MIC SELECT switch Fu
nction oftheDY NA MIC SELECT switch *
NO
TEMercede s-AMG vehicles #
Obser vetheno tesin theSupplement .
Yo uco uld other wise failto recogni ze
da ngers. %
Depe nding ontheengine andequipment,
th eve hicle hasdiffere nt drive pr ogr ams.
Use theDY NA MIC SELE CTswitc hto chang e
be tween thefo llo wing drive pr ogr ams.
The drive pr og ram sele cted app earsin themulti‐
func tion displa yof theon- boar dcom puter.
= Individual
R individual settings
B Sport+
R particular lyspor tydriving 13
4
Driving and parking

R
emphasises theve hicle's ownove rste er ing
and under steer ing charact eristic sfo ra mor e
activ edr iving style
R onlysuit able forgood road con dition s,adr y
ro ad sur face and acle arstre tchof road
C Sports
R con tinues toofferst abilit ybut withaspor ty
se tup
R allowsthespor tydriver amor eactiv edr iving
st yle
R onlysuit able forgood road con dition s,adr y
ro ad sur face and acle arstre tchof road
A Comfort
R com fortable andeconomic aldrivin g
R balan cebetween tract ion and stabilit y
R recomme ndedforall road con dition s
; Eco
R particular lyec ono micaldr ivin g
R balance betwee ntract ion and stabilit y
R recomme ndedforall road con dition s De
pen dingon thedr ive pr ogr am, thefo llo wing
sy stems chang eth eir charact eristic s:
R Drive
- Engin eand transm issionman agemen t
- ActiveDis tance AssistDIS TRONI C
R ESP ®
R Vehicl eswith AIRMA TICorDY NA MIC
BO DY CONT ROL:suspen sion
R Elec tric po we rst eer ing Selecting
thedr ive pr og ram #
Press DYNA MIC SELE CTswitc h1 forw ards
or bac kwards.
The drive pr og ram sele cted app earsin the
multifu nctiondisplay. Dr
iving and parking 13
5

Conf
iguringdrive pr og ram I Mu
ltimed iasystem:
4 Vehicle 5
e DYNA MICSELECT
5 Individual #
Select theindividual setting. Switc
hingtheoper ation feedba ckfordr ive
pr og rams onoroff Mu
ltimed iasystem:
4 Vehicle 5
e DYNA MICSELECT #
Switc hNotif ication forUser on0073 oroff0053.
When this func tion isact ive, acor responding
messag eis sho wninthemedia displaywhen
a dr ive pr og ram issele cted withth e
DY NA MIC SELE CTswitc h. Displa
yingvehicl edata Mul
timedi asy stem:
4 Vehicle 5
e DYNA MICSELECT #
Select Vehicle Data.
The vehicle datais displa yed. Displa
yingengine data Multimedia
system:
4 Vehicle 5
e DYNA MICSELECT #
Select Engine Data.
% The actual (maximum) values that can be
ac hie vedfo rengine outputand engine tor‐
qu ema yde viat efrom thecer tified values
wit hin thecount ry-spe cificgu ideline sfo r
per missible toler anc es(basis: UN-ECE No.
85 orcount ry-spe cificgu ideline s).
Fa ctor sth at can influen cethis are, forex am‐
ple:
R Sea leve l
R Fuelgrade
R Outside temp eratur e
R Oper ating temp eratur eof theengine
% The values displa yedser veonl yas orient a‐
tion. Thevalues forengine outputand
engine torq ue show nin themedia display
ma yde viat efrom theactual values. Au
tomatic trans mis sion DI
REC TSE LECT leve r Fu
nction oftheDIRECT SELECT leve r &
WARNIN GRisk ofacci dent dueto inc or‐
re ct gearshif ting
If th eengine speedishigher than theidle
speed andyouen gage thetransmission posi‐
tion 005Bor005E, theve hicle mayacceler ate
shar ply. #
Ifyo uen gage thetransmission position
005B or005E when theve hicle isat a
st ands till,alw aysdepr essthebr ak e
pedal firm lyand donotacc eler ateat
th esame time. 13
6
Driving and parking

&
WARNIN GRisk ofacci dent andinjury
due tochildr enleftunat tende din the
ve hicle
If ch ildr enarelef tunsuper visedintheve hi‐
cle, they cou ld,in pa rticular :
R open doors,ther eb yendang ering other
per sons orroad user s.
R getou tand bestru ck byoncom ingtraf‐
fi c.
R ope rate vehicle equipment andbecome
tr apped, forex am ple.
In addit ion,th ech ildr encould alsosetth e
ve hicle inmo tion, forex am ple by:
R releasing thepar king brak e.
R chang ingthetra nsmiss ionposition .
R star tin gth eve hicle. #
Neverlea vechildr enunat tende din the
ve hicle. #
When leaving theve hicle, alwaysta ke
th eSmar tKey wit hyo uand lockth e
ve hicle. #
Keep theve hicle SmartKey out ofreac h
of childr en. Use
theDIRE CTSELECT leve rto switc hth e
tr ans missi on positio n.Thecur rent trans mis sion
po sitio nis displ ayed inthemultifunc tiondispla y. 005D
Park position
005E Reversege ar 005C
Neut ral
005B Drive po sitio n
En gaging reve rsege ar R #
Depr essthebr ak epedal andpush the
DIR ECT SELEC Tleve rupw ards pas tth efirs t
point ofresis tance.
En gaging neutr alN #
Depr essthebr ak epedal andpush the
DIR ECT SELEC Tleve rup ordown tothefirs t
point ofresis tance.
% Toshif tint oneutr al005C withth eignition on,
push theselect orleve rup ordown forse v‐
er al seconds tothefirs tpo int ofresis tance.
Sub sequently releasing thebr ak epedal will
allo wyo uto mo vetheve hicle freel y,e.g. topush
it or tow itaw ay.
Pr ocee das follo ws ifyo uwa nttheaut oma tic
tr ansm ission toremain inne utr al005C 005C,
evenif
th eignit ionisswitc hedoffor thedr iver' s
door isopened : #
Dep ress thebr ak epedal andengageneutral
005C when theve hicle isat ast ands till. Dr
ivin gand parking 13
7

#
Release thebr ak epedal. #
Switc hth eignition off.
% Ifyo uth en exitth eve hicle leaving the
Smar tKey intheve hicle, theaut omatic trans‐
mission remains inneutr al005C.
Eng aging parkpositio nP #
Obser vetheno teson par king theve hicle
(/ page14 3). #
Depr essthebr ak epedal untiltheve hicle
comes toast ands till. #
When theve hicle isat ast ands till,pr ess but‐
to n005D.
Whe nth etransmission positiondisplay
sho ws005D,th epar kposition iseng aged. Ifno
tra nsmiss ionposition display005D appear s,
secur eth eve hicle topreve ntitfrom rolling
aw ay.
% Dep endingonthesituation ,it ma yta ke a
shor ttime until005Diseng aged. Ther efor e,
alw ayspa yatt ention tothetra nsmiss ion
position display. Pa
rk position 005Diseng aged aut omatic allyif one
of thefo llo wing condition sis me t:
R Youswit choffth eignition whentheve hicle
is statio naryand thetransmission positionis
005B or005E.
R Youopen thedr iver's door when theve hicle
is at ast ands tillor when drivin gat ave ry low
speed andthetransmission positionis005B or
005E.
% Tomaneu verwit han open driver's door ,
open thedr iver's door while atast ands till
and engagetrans miss ionposit ion005Bor005E
ag ain.
Eng agin gdr ive posi tion D #
Depress thebr ak epedal andpush the
DIR ECT SELEC Tleve rdo wn pas tth efirs t
point ofresis tance.
Whe nth eaut omatic transmiss ionisin transmis‐
sion position 005B,itshif tsthege arsaut omat i‐
call y.This depends, amongother things ,on the
fo llo wing fact or s:
R The select eddrive pr ogr am
R The position oftheaccelera torpeda l R
The driving speed Pr
obl ems with thetransm ission Th
etransm ission hasafa ulty gear shif t
Po ssible cause:
R The transmission islosing oil. #
Have thetra nsmiss ioncheckedat aqu alif ied
spec ialistwo rkshop immediat ely.
The accel eration charact eristics getwo rse,
and thetransm ission nolong ershif ts.
Po ssible cause:
R The transmission isin emer gency operati on
mod e:itis only possi ble to shif tto one gear
and reve rsege ar. #
Pull overand stop theve hicle safely assoon
as possible, paying attention toroad and traf‐
fi c condi tions. #
Shif tth etra nsmiss iontoposition 005D. #
Switc hof fth eengine. #
Waitat leas tte nseco nds. 13
8
Driving and parking