tow MERCEDES-BENZ C-CLASS CABRIOLET 2020 Repair Manual

*
NO
TEStainin gcaus edbyleakin gtir e
sealant Af
teruse, excess tiresealant mayleak out
fr om thefilling hose. #
Ther efor e, place thefilling hose inthe
plas ticbag that con tained theTIREFI T
kit. +
ENVIR
ONMEN TALNO TEEnvironme ntal
po lluti on cau sed byenvironmen tally irre ‐
sponsible disposal Ti
re seala ntcont ains pollu tants. #
Have thetir esealant bottle disposed of
pr ofessionall y,e.g. atan aut hor ized
Mer cedes- BenzCenter. #
Switc hof fth etir einf lation compressor . #
Unscr ew thefilling hose from theva lve of the
fa ulty tire. #
Stow thetir esealant bottle and thetir einf la‐
tion compressor . #
Pull away imm ediat ely. #
Stop driving afte rapp roxima tely tenminu tes
and checkth etir epr essur eusing thetir e
inf lation compressor .
The tirepr essur emus tno wbe atleas t
13 0kP a(1 .3 bar/1 9psi) . &
WARNIN GRisk ofacci dent dueto the
specif iedtirepr essur eno tbeing reac hed
If th especif iedtirepr essur eis no tre ac hed
af te ra br ief drive, thetir eis toobadly dam‐
ag ed. The tiresealant cannotrepair thetir e
in this ins tance.
Dama gedtir es and tirepr essur eth at istoo
lo w can significan tly im pair thebr aking prop‐
er ties and thehandling charact eristic s. #
Donotcon tinue drivin g. #
Con sult aqu alif ied spec ialistwo rkshop. In
cases suchas theone ment ioned above,con ‐
ta ct an author ized Mercedes-B enzCent er.Or
call 1-80 0-FOR-ME RCedes (intheUS A)or
1-8 00-387-0 100(in Canada). #
Cor rect thetir epr essur eif it is still at leas t
13 0kP a(1 .3 bar/1 9psi) .See theTire and Loadi
ngInfo rm atio nplacar don thedr iver's
side B‑pillar orthetir epr essur eta ble inthe
fuel filler flap forva lues. #
Toincr ease thetir epr essur e:swit chon
th etir einf lation compressor . #
Toreduce thetirepr es sur e:press press ure
re lease button1 next to pressur ega ug e
2. #
When thetir epr essur eis cor rect, unscr ew
th efilling hose from theva lve of thesealed
tir e. #
Screw theva lve cap ontoth eva lve of the
sealed tire. Br
eakdo wnassis tance 37
3

#
Dur ing star ting assistance :st ar tth e
engine ofthedonor vehicle andrunat idle
spe ed. #
Connect theneg ativepole ofthedonor bat‐
te ry and grou nd point 4 ofyour ow nve hicle
by usin gth ejum per cable/c harging cable.
Begin withth edonor batteryfirs t. #
During star ting assistance :st ar tth e
engine ofyour ow nve hicle. #
Dur ing thech argin gpr oc ess :st ar tth e
ch argin gpr oce ss. #
Dur ing star ting assistance :le tth eengines
ru nfo rse veralmin utes. #
Dur ing star ting assistance :bef oredis con‐
necting thejum per cable, switchon anelec‐
tr ical consumer inyour ow nve hicle, e.g.the
re ar wind owheat eror lighting.
When thest ar tin gassis tance/c harging proce ss
is com plet e: #
First,re mo vethejum per cable/c harging
cable from ground point 4and negative
pole ofthedonor battery, then from positiv e
clam p3 and positiv epole ofthedonor bat‐ te
ry.Begi nea ch tim ewi th thecon tacts on
yo ur ow nve hicle firs t. #
Afterre mo ving thejum per cable/c harging
cable, closecover2 ofposi tiveclam p3. #
Closecover1.
Fu rther information canbeobt ained ataqu ali‐
fi ed specialis two rkshop. Re
plac ingthe 12Vbatt ery #
Obs erve theno teson the12 Vbatt ery
(/ page37 4).
Me rcedes-B enzrecomme ndsthat youha ve the
12 Vbatt eryre placed ataqu alif ied spec ialist
wo rkshop, e.g.atan aut hor ized Mercedes-Benz
Cent er.
Obser vethefo llo wing notesif yo uwa ntto
re place thebatt eryyo urself :
R Alw aysre place afa ulty battery wit habatt ery
whic hmee tsthespecif icvehicle requ ire‐
men ts.
The vehicle iseq uipped withan AGMtech nol ‐
ogy batter y(A bso rbentGlas sMa t)or alith ‐ ium-io
nbatt ery. Fu llve hicle functionality is
onl yguar anteed withan AGMbatt eryor lith‐
ium-ion battery. Fo rsaf etyre ason s,
Mer cedes-Ben zre comme ndsthat youon ly
use batteries whic hha ve been tested and
appr ovedfo ryo ur vehicle byMer cedes-Ben z.
R Carryove rde tach able parts,suc has vent
hos es,elbo wfitting orterm inal covers from
th ebatt erybeing replaced.
R Mak esur eth at theve nt hos eis alwa ys con‐
nect edtotheor iginal opening ontheside of
th ebatt ery.
Ins tallan yex istin gor supplied cellcaps.
Ot her wise, gases orbatt eryacid could
escape.
R Mak esur eth at detach able partsarere con‐
nect edinthesame way. To
w star ting ortowing away Pe
rm itted towing methods Mer
cede s-Ben zre comme ndstransp orting your
ve hicle inthecase ofabr eakdo wn,rath er than
to wing itaw ay. Br
ea kdo wnassista nce 37
9

Fo
rto wing, useato w rope ortow bar withbo th
axle son thegr ound. Donotuse tow bar sys‐
te ms. *
NO
TEDama getotheve hicle duetotow‐
ing away inc orrectl y #
Obs erve theins truction sand noteson
to wing away. Pe
rm itted towing methods Ve
hicl eeq uipment/ towing
me thod Bo
th axle son thegr ound Fr
ont axle raised Re
ar axle raised
Ve hicles withaut omatic transmis‐
sion Ye
s,maximum 31mile s(50 km) at
31 mp h(50 km/h) No
Yes,ifth esteer ing wheel isfixe din
th ecent erposition withast eer ing
wheel lock.
4MA TICvehicles Yes,maximum 31mile s(50 km) at
31 mp h(50 km/h) No
NoTo
tow wit hara ised axle: towing should be
per form ed byato wing company. 380
Breakdo wnassis tance

To
wing theve hicl ewith both axle son the
gr ound #
Obser vetheno teson theper mitt edtowing
me thods (/page37 9). #
Makesur eth at thebatt eryis con nect edand
ch arge d.
Obser vethefo llo wing pointswhen thebatt eryis
disc harged:
R The engin ecann otbe star ted
R The electr icpar king brak ecann otbe
re leased orapplied
R Vehicl eswith automatic transmiss ion:
The automatic transmiss ioncanno tbe shif‐
te dto position 005Cor005D.
% Vehicl eswith automatic transmiss ion:If
th eaut omatic transmiss ioncann otbe shif‐
te dto position 005C,orthemultifunc tiondis‐
pla yin theins trument clusterdoes notsho w
an ything, have theve hicle transpor tedaw ay
( / pag e382). Atowing vehicle withlifting
eq uipment isrequ ired forve hicle transpor ta‐
tio n. *
NO
TEDama gedue totowing away at
exc essiv elyhigh speeds orove rlong dis‐
ta nces The
drivet ra in could bedamag edwhen tow‐
ing atexc essiv elyhigh speeds orover long
dis tances. #
Atowing speed of30 mph(50 km/h)
mus tno tbe exc eeded. #
Atowing distance of30 miles(50 km)
mu stnotbe exc eeded. &
WARNIN GRisk ofacci dent whento wing
a ve hicle whichis toohea vy
If th eve hicle being tow- star tedor towe d
aw ay ishea vier than theper missible gross
mass ofyour vehicle, thefo llo wing situat ions
can occur:
R The towing eyema ybecome detach ed.
R The vehicle/tr ailercombination may
sw erve oreve nov ertur n. #
Ifano ther vehicle istow- star tedor
to we daw ay,its weight mustno texc eed th
eper missible gross mass ofyour ow n
ve hicle. If
ave hicle mustbe tow- star tedor towe daw ay,
its per missib legross weight mustno texc eed the
per missible gross weight oftheto wing vehicle. #
Information ontheper missible gross mass of
th eve hicle canbefound ontheve hicle iden‐
tif ication plate(/ page422). #
Vehicl eswith automatic transmiss ion:Do
no topen thedr iver's door orfront passeng er
door ,ot her wise theaut omatic transmiss ion
aut omaticall yshif tsto position 005D. #
Installth eto wing eye(/ page38 4). #
Fasten theto w bar .
* NO
TEDama gedue toinc orrect connec‐
tion oftheto w bar #
Onlyconnect theto w rope ortow bar to
th eto wing eyes. #
Deact ivat eth eaut omatic locking mechanism
(/ page71 ). Br
eakdo wnassis tance 38
1

#
Donotacti vate theHOLD function. #
Deact ivat eAc tiveBr ak eAssi st
( / pag e17 2). #
Vehicl eswith automatic transmiss ion:
Shif tth eaut omatic transmiss iontoposition
005C. #
Release theelectr icpar king brak e. &
WARNIN GRisk ofacci dent dueto limi‐
te dsaf ety-re lat ed func tionsdur ing the
to wing proce ss
Saf ety-re lat ed func tionsar elimit edorno lon‐
ge rav ailable inthefo llo wing situat ions:
R theignition isswitc hedoff.
R thebr ak esy stem orpowe rst eer ing sys‐
te m ismalfu nctioning.
R theener gysupply ortheon- boar delectr i‐
cal system ismalfunct ioning.
When your vehicle isthen towe daw ay,signif ‐
icant lymor eef fort ma ybe requ ired tosteer
and brak eth an isno rm allyre qu ired. #
Use ato w bar . #
Mak esur eth at thesteer ing wheel can
mo vefreely ,bef oreto wing theve hicle
aw ay. *
NO
TEDama gedue toexcess ive tracti ve
po we r If
yo upull away shar ply, thetractiv epo we r
ma ybe toohigh andtheve hicles couldbe
damag ed. #
Pull away slo wlyand smoo thly. Lo
adi ng the vehicl efo rtr ans port #
Obser vetheno teson towing away
( / pag e38 1). #
Connec tth eto w bar totheto wing eyein
or der toload theve hicle. #
Vehicl eswith automatic transmiss ion:
Shif tth eaut omatic transmiss iontoposition
005C.
% Ve
hicl eswith automatic transmiss ion:
The automatic transmiss ionmaybe locked in
posit ion005Dintheeve ntofdama getothe
electr icalsystem. Toshif tto 005C ,pr ov ide the
on-boar delectr icalsystem withpo we r
( / pag e37 8). #
Load theve hicle ontoth etra nspor ter. #
Vehicl eswith automatic transmiss ion:
Shif tth eaut omatic transmiss iontoposition
005D. #
Use theelectr icpar king brak eto secur eth e
ve hicle agains tro lling away. #
Onlysecur eth eve hicle bythewheels.
AMG vehicl eswith ADSPL US exceptAMG
Pe rfor ma nce vehicl es &
WARNIN GRisk ofan acci dent when
tr ansp orting vehicles withAd aptive
Dam pingSy stem PLUS
The reduced damping forc es on theve hicle
being transpor tedcan cause theve hicle/
tr ailer combination tostar tto swing.
As are sult, when transpor tingvehicles with
th eAd aptiveDam pingSy stem PLUS, the 382
Breakdo wnassis tance

ve
hicle/tr ailercombination mayst ar tto skid.
Conseq uently,yo uco uld lose contro lof your
ve hicle. #
When transpor ting,ensur eth at:
R The vehicle hasbeen loaded onto
th etranspor tercor rectl y
R The vehicle issecur edatall four
wheel swit hsuit able tensi oni ng
st ra ps
R The maximum permissible speedof
35 mph(6 0km/h) isno texc eeded
when transpor ting *
NO
TEDama getotheve hicle from secur‐
ing itincor rectl y #
Afterloa ding, theve hicle mustbe
secur edon allfour wheel s.Ot her wise,
th eve hicle could bedamag ed. #
Aminimum distance of8in (20 cm)
up wa rdsand 4in (10 cm) down wards
mus tbe kept tothetranspor tplatf orm. #
Secur eth eve hicle onallfour wheel saf te r
loading .
4MA TICvehicl es/vehicl eswith automatic
tr ansmiss ion #
Mak esur eth at thefront and rear axle scom e
to rest on thesame transpor tatio nve hicle.
* NO
TEDama getothedr ivet ra in due to
inc orrect pos itioning #
Donotpos ition theve hicle abovethe
connecti onpointofthetranspor tve hi‐
cle. To
wing eyesto rage location To
wing eye1 islocat edinthestow agespac e
unde rth etrunk floor . Br
eakdo wnassis tance 38
3

Ins
tallin gth eto wing eye #
Press themar kon cover1 inwa rdsand
re mo ve. #
Screw intheto wing eyecloc kwiseasfaras it
wil lgo and tight en.
% Mak esur eth at cover1 eng ages inthe
bum perwhen youre mo vetheto wing eye. *
NO
TEDama getotheve hicle dueto
inc orrect useof theto wing eye When
ato wing eyeis used toreco vera ve hi‐
cle, theve hicle maybe damag edinthepr oc‐
ess. #
Onlyuse theto wing eyeto tow aw ay or
to w star tth eve hicle. To
w star ting theve hicl e(eme rgency engine
st ar t) Ve
hicl eswith automatic transmiss ion
* NO
TEDama getotheaut omatic trans‐
mission duetotow star tin g The
automat ictransm issionma ybe damag ed
in thepr ocess oftow star tin gve hicles with
aut omatic transmission. #
Vehicles withaut omatic transmission
mus tno tbe tow star ted. #
Vehicles withaut omatic transmission must
no tbe tow- star ted. Electr
icalfuses No
teson electr icalfuses &
WARNIN GRisk ofacci dent andinjury
due tooverloaded lines
If yo uman ipulat eor bridg eafa ulty fuse orif
yo ure place itwit hafuse withahigher
am per age, theelectr icline could beove rloa‐
ded.
This could result inafire . #
Alw aysre place faulty fuseswit hspec i‐
fi ed newfuses containin gth ecor rect
am per age. *
NO
TEDama gedue toinc orrect fus es Electr
icalcom pone ntsorsystems maybe
damag edbyinc orrect fus es, ortheir func ‐
tion ality maybe signif icantlyim pair ed. #
Onlyuse fuses that have been approved
by Mer cedes-Ben zand whic hha ve the
cor rect fus era ting . 38
4
Brea kdo wnassist anc e

R
Recomme ndedtirepr ess ures 1 forcold
tir es. The recomme ndedtirepr ess ures are
va lid forth emaximum permissible loadand
up tothemaximum permissible vehicle
speed.
Please alsonote:
R Information onper missib lewe ight sand loads
on theve hicle identif ication plate
(/ page422).
R Information ontirepr essur ein thetir epr es‐
sur eta ble (/ page39 1).
Fu rther relat ed subje cts:
R Determ inin gth emaximum permissible load
(/ page398)
R Noteson tirepr essur e(/ page390). Ste
psforDe term ining Correct Load Limit The
follo wing steps have been developed as
re qu ired ofall manuf acturersunder Title 49,
Co de ofU.S. Feder alRe gulations, Part57 5pur‐
sua nttothe"N ational Traf fic and MotorVe hicle
Saf etyAc tof 1966". #
Ste p1: Loca tethest at emen t“T he combined
we ight ofocc upant sand cargoshould never
exc eed XXX kgorXXX lbs.”on your vehicle ’s
placar d. #
Ste p2: De term ine thecombin edweight of
th edr iver and passeng ersth at will beriding
in your vehicle. #
Ste p3: Sub tract thecombin edweight ofthe
dr iver and passeng ersfrom XXX kgor
XXX lbs. #
Ste p4: The resulting figur eeq uals theav ail‐
able amoun tof car goand luggageload capa‐
cit y.Fo rex am ple, ifth e“XXX” amount equals
14 00 lbs. and ther ewill befive 150lb pas ‐
seng ersin your vehicle, theamount ofavaila‐
ble cargoand luggageload capac ityis
65 0lbs. (140 0-75 0(5 x15 0) =650 lbs.) #
Ste p5: De term ine thecombin edweight of
lugg ageand cargobeing loaded ontheve hi‐
cle. That weight mayno tsaf elyexc eed the
av ailable cargoand luggageload capac ity
calc ulatedinStep 4. #
Ste p6: Ifyo ur vehicle willbetowing atrailer ,
load from your trailer willbetrans ferred to yo
ur vehicle. Consult this manual todeter‐
mine howthis reduces theav ailable cargo
and luggageload capac ityofyour vehicle.
% Notall vehicles areper mitt edtotow a
trailer .To wing atrailer isonl yper mittedifa
tra iler -hit chisins talled. Please consult an
aut hor ized Mercedes -Benz dealer ifyo uha ve
an yqu estion sabout towing atrailer with
yo ur vehicle.
Ev en ifyo uha ve cal cul ated thetot alload care‐
full y,yo usho uld still mak esur eth at themaxi‐
mum permissible gross mass andthemaximum
gr oss axle weight rating ofyour vehicle areno t
exc eeded. Details can befound ontheve hicle
identif ication plate. #
Have your loaded vehicle –including driver ,
occupants andload –we ighed onave hicle
we ighbr idge.
The measur edvalues mayno texc eed the
maximu mper missi blevalues stat ed on the
ve hicle identif ication plate.
Fu rther relat ed subje cts:
R Calculation exam ple forde term inin gth emax‐
imum load(/page399) 398
Wheels andtires

*
NO
TEPrema ture wearthro ugh unleaded
re gular gasoline Un
leade dre gular gasoline cancause the
engine towe armor equ ickl yand impair lon‐
ge vity and perform anc e.
If unle aded premium grade gasoline is
una vailable andyouha ve torefuel using
unle adedre gular gasoline: #
Onlyfill th efuel tank tohalf fullwith
unleaded regular gasoline andfill up as
soon aspossible withunleaded pre‐
mium grade gasoline. #
Donotdr ive at themaximum design
speed. #
Avoid sudden accelerationandengine
speeds over3000 rpm. Fu
rther information onfuel isavailable atthefo l‐
lo wing locations:
R Ataga sst atio n
R Ataqu alif ied spec ialistwo rkshop
R USAonly: athttp: //www .mbusa.com Inf
ormat iononaddit ives ingasoline
Obser vetheno teson oper ating fluids
(/ page42 4).
* NO
TEDama gefrom use ofunsu itabl e
add itives Ev
en smal lamou ntsofthewr ong additiv e
ma ylead tomalfu nctions occurring. #
Only addcle ani ng additiv es recomme n‐
ded byMer cedes-Ben zto thefuel. Mer
cedes- Benzrecomme ndsthat youuse fuel
br and sth at have addit ives.
In som ecoun tries, thefuel available mayno t
ha ve suf ficie ntadditiv es. Residue could buildup
in thefuel injec tionsystem asare sult. Inthis
case, incon sult ation withan aut hor ized
Mer cedes -Benz Cent er,th efuel maybe mix ed
wit hth ecleanin gadditiv ere comme ndedby
Mer cedes-Ben z.Be sureto obser vetheno tes
and mixing ratio ssp eci fied on thecon tainer .
Ta nk cont entand fuel reser ve
The totalcapac ityofthefuel tank mayva ry,
dependin gon theve hicle equipment. Capacity Model
Total cap acity
Al lmo dels 17.4 gal(66. 0liter s) Model
ofwhic hre ser ve
fuel
All model s1 .8gal(7 .0 liter s) Engine
oil No
teson engine oil
Obser vetheno teson oper ating fluids
(/ page42 4). 426
Tech nica lda ta

Disp
laymes sages
Possible causes/conseq uencesand0050 0050
Solutions
If th eelectr icpar king brak eshould notbe applied, e.g.when washing theve hicle inan aut omatic carwash orwhen
ha ving theve hicle towe d,lea vetheignition switchedon.This does notinclude having theve hicle towe dwit hth e
re ar axle raised.
If th eelectr icpar king brak eis no tapplied automaticall y: #
Switc hof fth eignition andturnit bac kon. #
Release andthen apply theelectr icpar king brak emanuall y(/ page16 0).
If it is still no tpossible toappl yth eelectr icpar king brak e: #
Consult aqu alif ied spec ialistwo rkshop. #
Wher enecessar y,also secureth epar kedve hicle agains tro lling away.
To release: #
Ifth econ ditions forau tomatic release arefulf illed andtheelectr icpar king brak eis no tre leased automat ically,
re lease theelectr icpar king brak emanuall y(/ page16 0).
If it is still no tpossible torelease theelectr icpar king brak e: #
Donotcon tinue driving under anycir cums tances. Consu ltaqu alif ied spec ialistwo rkshop. 44
2
Dis play messa gesand warning/ indic ator lam ps