tow MERCEDES-BENZ C CLASS 2021 Repair 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 andrefill as
soon aspossible withunleaded pre‐
mium grade gasoline. #
Donotdr ive at themaximum design
speed. #
Avoid sudden accelerationengine
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 onthehtt ps:/ /www .mbusa.c om(USAonl y) No
teson add itivesingasoline
Obser vetheno teson oper ating fluids
(/ page36 9).
* 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
br and -name fuels withaddit ives.
In som eco unt ries, 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,mix thefuel withth e
cle ani ng additiv ere comme ndedbyMer cedes-
Benz .Obser vetheno tesand mixing ratio sind i‐
cat edon theta nk . Ta
nk cont entand reser vefuel
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
(/ page36 9). 37
2
Tech nica lda ta

Disp
laymes sages
Possible causes/conseq uencesand0050 0050
Solutions
To appl y: #
Swi tchth eignition off.
The electr icpar king brak ewill beapplied automaticall y.
If yo udo notwa nttheelectr icpar king brak eto be applied, e.g.atan aut omatic carwash orwhen theve hicle is
being towe d,lea vetheignition switchedon.This does notinclude having theve hicle towe dwit hth ere ar axle
ra ised.
If th eelectr icpar king brak eis no tapplied automaticall y: #
Switc hth eignition offand switc hit bac kon. #
Release andthen apply theelectr icpar king brak emanuall y(/ page15 6).
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(/ page15 6).
If it is still no tpossible torelease theelectr icpar king brak e: #
Donotcon tinue driving. Consult aqu alif ied spec ialistwo rkshop. 398
Displa ymessag esand warning/ indic ator lam ps

Ins
tallation locations................................ 41
Knee airbag.... .........................................4 1
Ov ervie w.. .................. ........................ ...... 41
PA SSENGER AIRBAGind icat orlam p....... 46
Pr otect ion.......................................... ...... 42
Side airbag ............................................... 41
Wi ndo wcur tain airbag .............................4 1
Air flow
Se tting. .................................................. 126
AIRM ATIC
Se tting.. .................................................1 89
Suspe nsion........... ............................ ..... 188
Alar m
see Panic alar m
Al ar m system
see ATA(anti-t heftal ar m system)
All-wheel drive
see 4MA TIC
Alt ernativ ero ute
see Route
Amb ientlighting
Se tting (mult imediasystem).. ................1 19 Andr
oidAuto
Con necting amob ilephon e...................2 70
Ending ...................................................270
Inf ormation ......................................... ... 270
Ov ervie w.. .......................................... ... 269
Sound settings... ................................... 270
Tr ans ferred vehicle data........................2 71
Anim als
Pe ts intheve hicle .............................. ..... 63
Anti-loc kbr aking system
see ABS(An ti-loc kBr akin gSy stem)
Anti-skid chains
see Snowch ains
Anti -thef tpr otection
Imm obiliz er...................................... ........ 85
Anticip ator yoccupa ntprotection
see PRE- SAFE®
(anticip ator yoccu‐
pa nt protect ion)
see PRE-S AFE®
PL US (antic ipatory
occupant protect ion plus)
Apple CarPla y®
Connec tinganiPhone ®
... ......................2 68
Ending ...................................................269 No
tes... .................................................2 68
Ov ervie w.......... .....................................268
Sound settings ......................................269
Tr ans ferred vehicle data........................2 71
Assis tance systems
see Drivin gsaf etysy stem
ASS YSTPL US
Batt erydi sconne ctionpe riods..... ..........3 01
Dis play ing theser vice duedate............ 300
Fu nctio n/no tes.<0011001100110011001100110011001100110011001100110011001100110011
0011001100110011001100110011001100110011001100110011001100110011
0011001100110011> 300
Re gular maint enance work<0011001100110011001100110011001100110011001100110011001100110011
0011001100110011> 300
Spec ialser vice requ iremen ts................3 00
ATA (anti-thef tala rm system)
Ac tivati ng/d eactiv ating theint erior
mo tion sensor.. ....................................... 88
Ar ming/ disarming theto w- aw ay alar m...8 7
Dea ctivating thealar m............................ 86
Fu nctio n...<0011001100110011001100110011001100110011001100110011001100110011
001100110011001100110011001100110011> <0011001100110011001100110011001100110011001100110011001100110011
001100110011001100110011> 85
Fu nctio nof theint erior motion sensor.... 87
The tow- aw ay alar mfun ction ...................8 6
AT TENTI ONASSIST
Fu nctio n...<0011001100110011001100110011001100110011001100110011001100110011
001100110011001100110011001100110011> <0011001100110011001100110011001100110011001100110011001100110011
0011001100110011>164
Se tting <0011001100110011001100110011001100110011001100110011001100110011
0011001100110011001100110011001100110011001100110011001100110011
0011001100110011001100110011001100110011001100110011001100110011
001100110011> 165
Sy stem limit ations. ................................ 164 44
2
Inde x

Edi
ting thepr ev ious destination s........... 247
Ext ernal ............ .....................................247
Sa ving (current vehicle position)... ......... 247
Sa ving asglobal favo rite <0011001100110011001100110011001100110011001100110011001100110011
00110011001100110011001100110011> 247
St or ing amap position. .......................... 247
Des tinat ion entry
Ent ering a3 wo rdaddr ess............... ...... 238
En tering aPOI oraddress <0011001100110011001100110011001100110011001100110011001100110011
001100110011001100110011> 232
Ent ering anintermed iate des tination.... 236
En tering geo-coor dinates..... ................. 238
Select ingacont act.... ........................ ... 237
Select ingaPOI.. .................................... 235
Select ingfrom themap.... ..................... 238
Select ingprev ious destination s.............2 35
De tectin ginat tentiv eness
see ATTENTION ASSIST
Diagnos ticsconnec tion.............................. 26
Digit alOper ator's Manua l... ....................... 20
Dingh yto wing
see Tow- bar system
DIRECT SELECT leve r
Eng aging drive po sitio n............ .............145
Eng aging neutr al....... .............................144
Eng aging park position .......................... 145 Eng
aging park position automatic ally....1 45
Eng aging reve rsege ar. ...................... .... 144
Fu nctio n...<0011001100110011001100110011001100110011001100110011001100110011
0011001100110011001100110011001100110011> <0011001100110011001100110011001100110011001100110011001100110011
001100110011>143
Disp lay(car e).............................................3 12
Disp lay(m ult imedi asy stem)
Se ttings. .......................................... ...... 221
Displa y(on-boa rdcom puter)
Dis play son themultifunc tiondispla y.... 209
Di spl aymes sage
Ca lling up(on-bo ardcom puter)..... ........ 379
No tes... ............................................. ..... 379
Disp laymes sages
00B2 ---mp h<0011001100110011001100110011001100110011001100110011001100110011
0011001100110011001100110011001100110011001100110011001100110011
0011001100110011001100110011> 402
ç ---mp h<0011001100110011001100110011001100110011001100110011001100110011
0011001100110011001100110011001100110011001100110011001100110011
0011001100110011001100110011> 402
003D 12VBatt erySee Oper ator's
Manual..... .............................................. 415
: ActiveHea dlamps Inoperati ve...... 386
é ATTENTION ASSISTInoper ative... .4 01
é ATTENTION ASSIST: Take a
Br ea k!<0011001100110011001100110011001100110011001100110011001100110011
00110011001100110011001100110011> <0011001100110011001100110011001100110011001100110011001100110011
0011001100110011>........402 :
Automatic HeadlampMode
Inoper ative....... ..................................... 385
0027 CheckBr ak eFlui dLe vel............... 400
0026 CheckBr ak ePa ds See Oper a‐
to r's Manua l......... ................................. 401
00BD CheckCool antLevelSee Oper‐
at or's Manual ........................................ 391
00B3 CheckEn gine OilAtNe xtRe fu‐
eli ng. ...... ............................................... 422
00B3 CheckEngi neOilLe vel(A dd 1
qu art).................................................... 423
: CheckLef tLo wBeam (exa m‐
ple)....... ................................................. 385
0077 CheckTire s<0011001100110011001100110011001100110011001100110011001100110011
0011001100110011001100110011001100110011001100110011001100110011
001100110011> 418
00B2 CheckWa sher Fluid... .................. 390
ÿ CoolantTooHo tSt op Vehicle
Tu rn Engi neOff............ ..........................391
0025 Current lyUn available See
Operat or'sMan ual................................. 410 44
8
Inde x

Dr
iver' sDoo rOp en &Trans miss ion
No tin PRisk ofVehicle Rolling Away.... 394
Fr ont Passeng erAirbag Disabled See
Oper ator's Manual.... ............................. 381
Fr ont Passeng erAirbag Enabled See
Oper ator's Manual.... ............................. 381
Hazar dWa rning Flashe rsMalfunc‐
tioning. .................................................. 388
Mer cedes meconn ectServices Limi‐
te dSee Oper ator's Manual. ...................4 15
N Pe rm anen tly Ac tiveRi sk ofRo lling
Aw ay<0011001100110011001100110011001100110011001100110011001100110011
0011001100110011001100110011001100110011001100110011001100110011
0011001100110011001100110011001100110011001100110011001100110011
001100110011001100110011> 394
Only Shiftto 'P' when Vehicle isSta‐
tio nar y...................................................3 93
Pla cetheKe yin theMar kedSpace
See Oper ator's Manual. .........................3 84
PRE-S AFEInoper ativeSee Oper a‐
to r's Manua l......... ................................. 382
Ra dar SensorsDir tySee Oper ator's
Manual. .................................................. 414 Re
versing NotPo ssible Service
Re quired ................................................ 395
Ru nFla tIndi catorInop erati ve............... 422
Ser vice Required Do NotShif tGear s
Vi sit Dealer.... ........................................3 94
St op Vehicle LeaveEngi neRunning
Wa itTrans miss ionCoolin g.. .................. 395
Ti re Press. Monit orCur rently
Un available ............................................ 417
Ti re Press. Monit orInopera tive... ........... 417
Ti re Pressur eMonit orInopera tiveNo
Wheel Sensors.. .....................................4 18
Ti re sOv erheat ed................................... 420
To Dese lect Por N, Dep ress Brak e
and StartEn gin e.. .................................. 394
To switc hengine off,pr ess and hold
St art/ Stop butt onforat lea st3
secs. orpress 3times...... ..................... 391
Tr ans miss ionMalfun ction Stop..... ........ 395 Displa
yon thewindsh ield
see Head- upDis play
Dis tance control
see ActiveDis tance AssistDIS TRONI C
DI ST RO NIC
see ActiveDis tance AssistDIS TRONI C
Do or
Ch ild sa fety lock (rear door s)...................6 1
Loc king (emerg encykey). ........................ 70
Ope ning (from inside ).............................. 68
Un loc kin g(emer gency key). .................... 70
Un loc kin g(fr om insid e)...........................6 8
Door controlpan el....................................... 16
DO T,Tire Iden tificat ionNumbe r(TI N)..... 348
Dr aw bar
see Tow- bar system
Dr inking anddriving... ...............................1 36
Dr ive Awa yAssis t.... .................................. 204
Dr ive Awa yAssis t
see Protect ion agains tcollision
Dr ive position
Inser ting.. ..............................................1 45 Inde
x45
1

Ext
erior mir rors
Anti-g lare mode (automatic).... .......... .... 123
Au tomatic mirrorfo lding function. .........1 25
Fo lding in/out.. .....................................1 22
Oper ating thememor yfunc tion.............1 01
Pa rking posit ion..................................... 124
Se tting <0011001100110011001100110011001100110011001100110011001100110011
0011001100110011001100110011001100110011001100110011001100110011
0011001100110011001100110011001100110011001100110011001100110011
001100110011> 122 F
Fa tig ue detection
see ATTENTION ASSIST
Fa vo rite s
Ad ding. .... ........................................ ...... 217
Callin gup ...............................................2 17
Del eting.. ...............................................2 17
Mo ving.. ............................................. ....2 17
Ov ervie w.. ..............................................2 16
Re nam ing<0011001100110011001100110011001100110011001100110011001100110011
001100110011001100110011001100110011> <0011001100110011001100110011001100110011001100110011001100110011
001100110011001100110011>217
Fi rs t-aid kit(sof tsi ded) <0011001100110011001100110011001100110011001100110011001100110011
001100110011001100110011> .......315
Flat tire
Chan gingawheel .................................. 359
MOE xtend edtires.. ................................ 316
No tes... ............................................. ..... 315
TIREFIT kit..............................................3 17 Flat
towing
see Tow- bar system
Floor mats.................................................. 113
Fo ilco vering
Ra dar and ultrasonic sensors................ 158
Fr ee sof tware.. ............................................ 34
Fr eq uencies
Tw o-w ayradio .................................. ...... 367
Fr ont airbag (driver ,fr ont passeng er).......4 1
Fr ont passeng erseat
see Seat
Fu el
Ad ditiv es.......................................... ...... 372
E1 0.<0011001100110011001100110011001100110011001100110011001100110011
0011001100110011001100110011001100110011001100110011001100110011
0011001100110011001100110011001100110011001100110011001100110011
0011001100110011001100110011> 371
Fu elreser ve<0011001100110011001100110011001100110011001100110011001100110011
0011001100110011001100110011001100110011001100110011001100110011
00110011001100110011001100110011001100110011> 372
Gasolin e............................................. ....3 71
Qua lity(gaso line ).<0011001100110011001100110011001100110011001100110011001100110011
0011001100110011001100110011001100110011001100110011001100110011
00110011> 371
Re fuel ing.... ...........................................1 48
Sulfu rcont ent............ ............................ 371
Ta nk cont ent<0011001100110011001100110011001100110011001100110011001100110011
0011001100110011001100110011001100110011> ................372
Fu nction seat
see Door controlpanel Fu
ses
Bef orere placing afuse .......................... 331
Dashboar dfuse box.............................. 333
Fu se assignment diagram...................... 331
Fu se boxin theengine compartmen t.... 332
Fu se boxin thefront -passen gerfo ot ‐
we ll....................................................... 334
Fu se boxin thetrunk... .........................3 34
No tes... .................................................. 331
Fu ses
see Fuses G
Gar agedoor opener
Clea ring thememor y.... .........................1 54
Opening orclosing thedoor.. ................1 54
Pr ogr amming buttons. ........................... 152
Re sol ving problems ...............................1 54
Sync hronizi ngthero lling code.. .............1 53
Gas station search
St artin gaut omat icsear ch<0011001100110011001100110011001100110011001100110011001100110011
00110011001100110011> 236
Swi tching theaut omatic searchon/
of f.......................................................... 242
Gasoli ne...................................................... 371 45
4
Inde x

Oper
ating fluids
Ad ditiv es(fuel) .................................. .....3 72
Br ak efluid ........................................ .....3 73
Coolan t(en gine).................................... 374
Engi neoil.... ............ ...............................372
Fu el(gasoline) ....................................... 371
No tes... .................................................3 69
Re frig er ant (airconditio ningsystem) ..... 375
Wi ndsh ield wa sher fluid .................... .....3 75
Oper ating safety
Decl arati on ofconf ormity (wirel ess
ve hicle component s)... ............................2 5
Inf ormation .......................................... .... 24
Oper ating system
see On-bo ardcom puter
Oper ator' sMan ual
Ve hicle equipment ................................... 22
Oper ator's Manual (digital)........................ 20
Op timized acceleratio n
Ac tivati ng........... ................................. ..135
Ov erhead controlpanel
Ov ervie w................................................. 14 P
Pa int code.. ................................................ 368
Pa intw ork(cleaning instructions) ...........3 09
Pa nic alar m
Ac tivati ng/d eactiv ating........... ................65
Pa nor ama roof wit hpo we rtil t/s lidin g
pane l
see Sliding sunroo f
Pa rk pos ition
Inser ting<0011001100110011001100110011001100110011001100110011001100110011
0011001100110011001100110011001100110011001100110011001100110011
00110011> ..............145
Sel ecting automatical ly<0011001100110011001100110011001100110011001100110011001100110011
001100110011001100110011001100110011> 145
Pa rked Vehicl eLoc ator
Switc hingtransmis sionon/of f.............. 223
Pa rking
see Elec tric par kingbr ak e
Pa rking aid
see Parking AssistPA RK TRONI C
Pa rking Assis tPA RK TRONI C
Ac tivati ng........... ................................. ..199
Ad jus ting warning tones <0011001100110011001100110011001100110011001100110011001100110011
00110011001100110011001100110011> 199
Fu nctio n...<0011001100110011001100110011001100110011001100110011001100110011
0011001100110011001100110011001100110011> <0011001100110011001100110011001100110011001100110011001100110011
001100110011>196
Sid eim pa ct protect ion.... .................. ....1 97
Swi tching off.<0011001100110011001100110011001100110011001100110011001100110011
0011001100110011001100110011001100110011001100110011001100110011
00110011001100110011001100110011> 199 Sy
stem limit ations. ................................ 196
Pa rking assis tance systems
see ActivePa rking Assist
Pa rking brak e
see Elec tric par kingbr ak e
Pa rking foran extended period.. .............. 157
Pa rking light s.............................................1 14
Pa rking posit ion
Ex terior mir rors<0011001100110011001100110011001100110011001100110011001100110011
0011001100110011001100110011001100110011001100110011001100110011
001100110011001100110011> 124
St or ing theposition ofthefront -
passeng eroutside mirrorusi ng
re ve rsege ar.......................................... 125
PA SSEN GERAIRBAGstatus displa y
see Automatic front pass engerfront
airb agshut off
Pa yload
Calculat ionexam ple.............................. 345
De term inin gth emaximum... ................. 344
Pe riod out ofuse
Ac tivati ng/d eactiv ating standb y
mode .....................................................1 57
St andb ymode function.. ........................ 157
Pe rm itted towing methods.. .....................3 27 Inde
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1