fuel MERCEDES-BENZ C-CLASS CABRIOLET 2020 Service Manual

*
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

*
NO
TEEngi nedama gecau sed byan
inc orrect oil filt er ,inc orrect oil oraddi‐
tiv es #
Donotus eengi neoilsor oil filt er sot her
th an those whic hmee tth especif ica‐
tion sneces saryfo rth epr escr ibed
ser vice interva ls. #
Donotalt er theengine oiloroil filt er in
or der toachie velong erchang eint erva ls
th an presc ribed. #
Donotuse additiv es. #
Have theengine oilchang edafte rth e
pr escr ibed interva ls. Mer
cedes -Benz recomme ndsthat youha ve the
oil chang ecar ried out ataqu alif ied spec ialist
wo rkshop.
Fu rther information onengine oiland oilfilt er sis
av ailable atthefo llo wing locations:
R IntheMer cedes- BenzSpecif ication sfo r
Oper ating Fluids byent ering thedesignation :
- Athttp: //be vo.mer cedes-b enz.com
- IntheMer cedes- BenzBeVoapp R
ataqu alif ied spec ialistwo rkshop
Quality andcapacity ofengine oil
MB-F reigabe orMB- Appr oval Gasol
ineeng inesE ngineoilspecif ica‐
tions
All models 229.51,229 .52,
229 .61
229 .71* *
Re comme ndedforlo we stpossible fuelcon‐
sum ption (lowe stSA Evis cos ityclassineach
case ;obs erve possible restrictions ofthe
appr ovedSA Evis cos ityclasse s).
To achie vethelowe stpossible fuelconsum ption,
it is recomme ndedtouse theengine oilspecif i‐
cation smar kedin theta ble forth elowe stSA E
viscosi tyclass .Po ssible restrictions ofthe
appr ovedSA Evis cos ityclasse smu stbe
obser ved.
The follo wing values referto an oilchang e,
inc ludin gth eoil filt er . Capa
city Model
Capacity
C 300 7.0 US qt(6.6 liter s)
C 300 4MATIC 6.3USqt(6.0 liter s) No
teson brak efluid Obser
vetheno teson oper ating fluids
(/ page42 4). &
WARNIN GRisk ofan acci dent dueto
va por pockets form ing inthebr ak esy s‐
te m
The brak efluid constantly absor bsmoi stur e
fr om theair .This lowe rstheboiling pointof
th ebr ak efluid. Ifth eboiling pointistoolow,
va por pockets ma yfo rm inthebr ak esy stem
when thebr ak es areapplied hard.
This causes thebr aking effect to be
im pair ed. #
Have thebr ak efluid rene we dat the
specif iedinterva ls. Te
ch nica lda ta 42
7

Disp
laymes sages
Possible causes/conseq uencesand0050 0050
Solutions
00D9 Please WaitCharging 48V
Batt ery… *T
he48 Vbatt eryis disc harged. Youha ve switc hedontheignition whilethe12 Vbatt erywa sbeing charge dwit ha
suit able charge ror whi leano ther vehicle waspr ov iding star tin gassis tance.
The disc ha rged 48 Vbatt eryis ch arge daut omatic allyviathevo ltag econ verter .Af tera fe w min utes, theEn gine
Can Now BeStarted displaymessag ewill besho wnonthemultifunc tiondispla y. #
Startth eengine. #
Drive th eve hicle fora whi leto charge the12 Vbatt eryand the48 Vbatt eryaf te rdisconnecting thech arge r
fr om theve hicle.
If th eEn gine CanNow BeStarted displaymessag edoes notappear afte ra fe w min utes: #
Tryto star tth eengine again. #
Ifth eengine doesnotst ar t,con sult aqu alif ied spec ialistwo rkshop.
00B6
Fuel Level Low *T
hefuel supply hasdropped intoth ere ser verang e. #
Refuel .
00B6
Ga sCa pLoose *T
hefuel filler cap isno tclos edcor rectly orthefuel system isleaking. #
Close thefuel filler cap. #
Ifth efuel filler cap wasalr eady proper lyclosed :con sult aqu alif ied spec ialistwo rkshop. Displa
ymessag esand warning/ indic ator lam ps 463

Engine
oil Displa
ymes sages
Possible causes/conseq uencesand0050 0050
Solutions
00B3 Check Engine OilAtNext
Refueling *T
heengine oilleve lhas dropped totheminimum leve l.
* NO
TEEngi nedama gecau sed bydriving withinsuf ficie ntengi neoil #
Avoid long journeys wit hins ufficie ntengi neoil. #
Checkth eengine oilleve lwhen next refuel ing.
Ad dengin eoil (/ page35 1).
No teson engine oil(/ page426).
00B3
Check Engine OilLevel
(Add 1quart) *D
ispla ymess ageonl yfo rcer tainengi nes:
The engineoille ve lhas dropped totheminimum leve l.
* NO
TEEngi nedama gecau sed bydriving withinsuf ficie ntengi neoil #
Avoid long journeys wit hins ufficie ntengi neoil. #
Whe nne xt refuel ing, add 1.1 US qt(1l)of engine oil(/ page35 1).
No teson engine oil(/ page426). 46
4
Displa ymessag esand warning/ indic ator lam ps

Wa
rning and indicat orlam ps Ov
ervie wof indicat orand warning lam ps Som
esy stems willperform aself -tes twhen the
ignit ionisswitc hedon.Som eindic ator and
wa rning lam psma ybr ief lylight uporflash. This
beha viorisno n-cr itical. Thes eind icat orand
wa rning lam psindic ateamalfun ction onlyif th ey
light uporflash afte rth eengine hasbeen star‐
te dor dur ing ajour ney.
Ins trum ent Disp lay(s tand ard) Wi
des cree nCo ckpit Instru men tDi spl ay Dep
endingonthedispla yse tting, theposition s
of theindicat orlam pson theIns trument Display
ma ydif ferfr om theex am ple shown.
Indi catorand warning lam ps:
0058 Lo
wbeam (/page11 4)
0060 Pa
rking lam ps(/ page11 4)
0057 Hi
gh beam (/ page11 5)
003E003D Tu
rn signal lights(/page11 5)
005E Re
ar foglam p(/ page11 4)
0075 Re
stra int system (/ page486)
00E9 Seat
beltnotfa stened 0027
US
A:brak es (red)
004D Canada:
brak es (red)
0024 Elect
ric pa rking brak e(yello w)
0049 US
A:elect ric pa rking brak eapplied
(r ed)
0024 Canada:
electric pa rking brak e
applied (red)
0025 AB
Smalfun ction
00E5 ESP®
00BB ESP®
OFF
L Distance warning (/ page493)
Ù Electric po we rst eer ing malfunct ion
(/ page498)
ä AIRMATICmalfunct ion
(/ page493)
ä DYNA MIC BODY CONTR OLmalfu nc‐
tion (/page493)
00B9 Chec
kEngine (/page49 4)
003D Electr
icalmalfu nction (/page49 4)
00B6 Fu
elreser vewit hfuel filler cap loca‐
tion indic ator (/ page49 4) Disp
lay mess ages and warning/ indic ator lam ps 485

Engine
Wa
rning/indicat orlam p
Possible causes/conseq uencesand0050 0050
Solutions
00B9 En gine diagnosis warning
lam p The
yello wChec kEn gine warning lam pis lit while theengine isrunning .
*A malfunctio nha soccu rred intheengine, theex haus tsy stem orthefuel system.
The emission limitvalues maybe exceed edand theengine maybe inemer gency mod e.
In som est at es, legalrequ iremen tsstipulat eth at youmus timm ediat elyco nsult aqu alif ied spec ialistwo rkshop as
soon astheye llo wChec kEn gine warning lam plight sup. #
Have theve hicle checkedas soon aspossible ataqu alif ied spec ialistwo rkshop.
003D Electr icalmalfunction warn‐
ing lam p The
redelect rical mal functi onwarning lam pis lit.
*T her eis amalfunction intheelectr ics. #
Obser vethemessag eson themultifunc tiondispla y.
00B6
Fu elreser vewarning lam p The
yello wfuel reser vewarning lam pis lit while theengine isrunning .
*T he fuel supply hasdropped intoth ere ser verang e. #
Refuel . 49
4
Displ aymessa gesand warning/ indic ator lam ps

Wa
rning/indicat orlam p
Possible causes/conseq uencesand0050 0050
Solutions
00B6 Fu elreser vewarning lam p The
yello wfuel reser vewarning lam plight sup while drivin g.
*Ther ehas been pressur eloss inthefuel system. Thefuel filler cap isno tclos edcor rectly orthefuel system isleak‐
ing. #
Close thefuel filler cap.
If th efuel filler cap hasalready been closedcor rectl y: #
Visit aqu alif ied spec ialistwo rkshop.
00AC Coola ntwa rning lam p The
redcoolant warning lam pis lit while theengine isrunning .
*P oss ible cau ses are:
R The temp eratur esensor ismalfunct ioning
R The coolant leve lis toolow
R The airsupply tothera diat orisobs truct ed
R The radiat orfanis faulty
If th er eis an additional warning tone, thecoolant temp eratur ehas exceeded themaximum permissible temp eratur e. &
WARNIN GDang erofburnswhen opening thehood
If yo uopen thehood when theengine hasoverheat edordur ing afire intheengine compartmen t,yo uco uld
co me intoco ntact withho tga ses orother escaping operating fluids. #
Beforeopen ingthehood, allowtheengine tocool down. Disp
lay mess ages and warning/ indic ator lam ps 495

Sy
stem limit ations ...............................2 02
Ac tiv eSe rvice System PLUS
see ASSYST PLUS
Ac tiv eSpe edLimit Assist <0011001100110011001100110011001100110011001100110011001100110011
0011001100110011001100110011> 178
Dis play <0011001100110011001100110011001100110011001100110011001100110011
0011001100110011001100110011001100110011001100110011001100110011
0011001100110011001100110011001100110011001100110011001100110011
0011> 178
Fu nctio n<0011001100110011001100110011001100110011001100110011001100110011
001100110011001100110011001100110011> <0011001100110011001100110011001100110011001100110011001100110011
001100110011001100110011>178
Ac tiv eSte ering Assis t.............................1 80
Ac tivati ng/d eactiv ating ........... ............182
Ac tiveEmerg encyStop Assis t.............1 84
Ac tiveLa ne Chang eAssi st<0011001100110011001100110011001100110011001100110011001100110011
00110011> 182
Dis play sin theIns trument Display...... 185
Fu nctio n<0011001100110011001100110011001100110011001100110011001100110011
001100110011001100110011001100110011> <0011001100110011001100110011001100110011001100110011001100110011
00110011001100110011>180
Sy stem limit ations ...............................1 80
Ad aptiv ecr uise contr ol
see ActiveDis tance AssistDIS TRONI C
Ad aptiv eHighb eamAssist
Fu nctio n<0011001100110011001100110011001100110011001100110011001100110011
001100110011001100110011001100110011> <0011001100110011001100110011001100110011001100110011001100110011
001100110011001100110011>117
Swi tching on/of f<0011001100110011001100110011001100110011001100110011001100110011
0011001100110011001100110011001100110011001100110011001100110011
00110011> 118
Ad diti onalvalue rang e
Se tting displa ycont ent ........................ 223
Ad diti ves.................................................. 426
En gine oil............................................ 426
Fu el ..................................................... 426 Ad
diti ves(engine oil)
see Additiv es
Ad diti ves(fuel)
see Fuel
Ad dres sbo ok
see Contacts
Ad jus tingthe balanc e/fader
Ad vanced soundsystem ......................3 46
Bur mes ter®
sur round soun dsy stem ...345
Ad jus tingthe sound focus
Bur mes ter®
sur round soun dsy stem ...345
Ad jus tingtreb le,mid- rang eand bass
se ttings
Ad vanced soundsystem ......................3 45
Bur mes ter®
sur round soun dsy stem ...345
ADS PLUS dam ping system
see AIRMA TIC
Ad vanced sound system
Ac tivati ng/d eactiv ating automatic
vo lume adjustment .............................. 346
Ad jus ting thebalance/f ader............ ... 346
Ad jus ting treb le,mid -rang eand bass
se tting s............. ..................................345 Ca
lling upthesound menu .................. 345
Inf ormation .......................................... 345
Af ter-sales service center
see ASSYSTPL US
Air bag
Re duced protect ion ...............................4 4
Air cond itioning system
see Climat econ trol
Air distribut ion
Se tting .................................................1 27
Air inle t
see Air-water duct
Air pressu re
see Tire pressur e
Air suspension
see AIRMA TIC
Air vents ................................................... 129
Ad jus ting (front) ............ ...................... 129
Ad jus ting (rea r) ............ ........................ 129
Ad jus ting theAIRSC ARFvents ............. 130
Air vents
see Airvents
Ai r-re cir cula tion mode............................ 128 Inde
x50
1

003D
48VBatt erySee Oper ator's
Manu al....... ......................................... 462
0049 ActiveHea dlamps Inoperati ve .... 483
é ATTENTION ASSISTInoper ative
... ..........................................................4 49
é ATTENTION ASSIST: Take a
Br ea k! <0011001100110011001100110011001100110011001100110011001100110011
00110011001100110011> <0011001100110011001100110011001100110011001100110011001100110011
00110011001100110011>........449
0049 Automatic HeadlampMode
Inoper ative..... ..................................... 482
0027 CheckBr ak eFlui dLe vel.............4 43
00BD CheckCoolan tLe velSee Oper‐
at or's Manual ...................................... 459
00B3 CheckEn gine OilAtNe xtRe fu‐
eli ng ...... .............................................. 464
00B3 CheckEngi neOilLe vel(A dd 1
qu art) .................................................. 464
0049 CheckLef tLo wBeam (Exam‐
ple) ...................................................... 482
0077 CheckTire s ................................ 472
00B2 CheckWa sher Fluid .................... 479 0059
Convertible TopLo we ring ........... 480
0059 Convertible TopOper ation Pos‐
sible to37 mph................................... 480
00AC Coolant TooHo tSt op Vehicle
Tu rn Engi neOff............ ............. ........... 459
0025 Current lyUn available See
Operat or'sMan ual...............................4 34
00E5 Current lyUn available See
Operat or'sMan ual...............................4 35
Á Don't Forget Your Key.................4 76
00B3 EngineOilLe velCann otBe
Mea sured <0011001100110011001100110011001100110011001100110011001100110011
00110011001100110011> <0011001100110011001100110011001100110011001100110011001100110011
0011001100110011>...466
00B3 Engine OilLevelLo wStop Vehi‐
cle Turn Engi neOff............ ............. .....465
00B3 EngineOilPr ess ureSt op
Switc hOf fEngin e................................ 466
00B3 EngineOil Reduce OilLevel........ 465
0075 Front LeftMalfunction Service
Re quired (exa mp le) .............................4 44 006F
Front LeftSeat Backres tNo t
Lo cked (Exam ple) ................................ 479
00B6 FuelLevelLo w ............................ 463
00B6 GasCap Loose ...........................4 63
0025 Inoper ativeSee Oper ator's
Manu al....... ......................................... 435
00E5 Inoper ativeSee Oper ator's
Manu al....... ......................................... 436
007A Inoper ativeSee Oper ator's
Manu al....... ......................................... 437
0053 Inoper ative....... .......................... 448
0049 Intell. Light System Inoperativ e
... ..........................................................4 83
Á KeyNo tDe tected (red displ ay
messa ge).............................................4 75
Á KeyNo tDe tected (whit edis‐
pl ay messa ge)...................................... 475
0075 LeftSide Curtain Air bag Mal‐
func tion Service Required (Exam ple) ...4 45
¢ Lowe ring <0011001100110011001100110011001100110011001100110011001100110011
00110011001100110011001100110011> ............450 Inde
x50
9

Pa
rking posit ion.............................. .....1 24
Se tting <0011001100110011001100110011001100110011001100110011001100110011
0011001100110011001100110011001100110011001100110011001100110011
0011001100110011001100110011001100110011001100110011001100110011
0011> 122
Ext ernal device
Loc king(c hild safetyloc k) .............. .....2 63
Ey eg lass escomp artment .......................104 F
Fa tig ue detection
see ATTENTION ASSIST
Fa vo rite s
Ad ding .................................................2 53
Ca lling up ....... .....................................253
Dele ting .......................................... ..... 253
Mo ving .............. .................................. 253
Ov ervie w ....... ................................... ...252
Re nam ing<0011001100110011001100110011001100110011001100110011001100110011
001100110011001100110011001100110011> <0011001100110011001100110011001100110011001100110011001100110011
001100110011>253
Fi rs t-aid kit(sof tsi ded) <0011001100110011001100110011001100110011001100110011001100110011
001100110011001100110011> ....367
Fl at tire <0011001100110011001100110011001100110011001100110011001100110011
001100110011001100110011> <0011001100110011001100110011001100110011001100110011001100110011
001100110011001100110011>.........368
Ch ang ingawh eel<0011001100110011001100110011001100110011001100110011001100110011
001100110011001100110011> ...........413
MOExt ended tires ................................ 368
No tes .................................................. 368
TIREFIT kit...........................................3 69 Flat
towing
see Tow- bar system
Floor mats................................................ 113
Fo ilco vering
Ra dar and ultrasonic sensors...............1 61
Fo lding draftsto p
Car e................................................ .... 362
Fo lding windscreen
Ins talling ................................................ 79
Re mo ving ..............................................7 9
Fr ee sof tware ............................................ 32
Fr eq uencies
Tw o-w ayradio ................................ ...... 421
Fr eq uency band
Dialin g(on -boardcom puter) ................ 228
Fr ont airbag ................................................ 41
Fr ont passeng erseat
see Seat
Fu el ...........................................................4 26
Ad ditiv es........................................ .....4 26
E1 0 ....... ............................................... 425
Fu elreser ve <0011001100110011001100110011001100110011001100110011001100110011
0011001100110011001100110011001100110011001100110011001100110011
00110011001100110011001100110011> 426Ga
sol ine <0011001100110011001100110011001100110011001100110011001100110011
0011001100110011001100110011001100110011001100110011001100110011
00110011001100110011001100110011001100110011001100110011> 425
Qua lity (gas oline )<0011001100110011001100110011001100110011001100110011001100110011
0011001100110011001100110011001100110011001100110011001100110011> 425
Re fuel ing ............................................. 150
Sul fur cont ent <0011001100110011001100110011001100110011001100110011001100110011
0011001100110011001100110011001100110011001100110011001100110011
00110011001100110011> 425
Ta nk cont ent <0011001100110011001100110011001100110011001100110011001100110011
00110011001100110011001100110011> ...............426
Fu elconsum ption
On- boar dcom puter .............................2 25
Fu nction seat
see Door controlpanel
Fu ses ........................................................ 384
Bef orere placing afuse ........................ 384
Dashboar dfuse box............................ 386
Fu se assignment diagram.................... 384
Fu se boxin theengine compartmen t.. 385
Fu se boxin thefront -passen gerfo ot ‐
we ll...................................................... 386
Fu se boxin thetrunk ........................... 387
No tes ................................................... 384
Fu ses
see Fuses G
Gar agedoor opener
Clea ring thememor y........................... 157 Inde
x51
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