2021 MERCEDES-BENZ C CLASS warning light

Wa
rning/indicat orlam p
Possible causes/conseq uencesand0050 0050
Solutions #
Stop theve hicle immediat elyinaccor dance withth etraf fic condi tions andswitchof fth eengine. Donotcon tinue
dr iving under anycir cums tances. #
Notethemessag eson themultifunc tiondispla y.
If th ecoolant temp eratur edispla yis at thelowe rend ofthete mp eratur escale: #
Consult aqu alif ied spec ialistwo rkshop.
If th ecoolant temp eratur edispla yis at theupper endofthete mp eratur escale: #
Exitth eve hicle andkeep asaf edis tance from itunti lth eengine hascooled down. #
Chec kth ecoolant leve l(/ page306) . #
Mak esur eth at theair supply tothera diat orisno tobs truct ed. #
Avoiding highloads ontheengine, drive to thenear estqu alif ied spec ialistwo rkshop. Indoing so,ensur eth at the
cool anttemp eratur edispla yre mains belowthere dar ea.
00B9 En gine diagnosis warning
lam p *T
he yello wChec kEn gine warning lam pis lit while theengine isrunning .
A ma lfunctio nha soccu rred intheengine, theex haus tsy stem orthefuel system.
The emission limitvalues maybe exc eeded andtheengine 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. 430
Displa ymessag esand warning/ indic ator lam ps

Wa
rning/indicat orlam p
Possible causes/conseq uencesand0050 0050
Solutions
003D Elect rical mal functi onwarn‐
ing lam p *T
heredelect rical fault warning lam pis lit.
Ther eis afa ult intheelectr ics. #
Notethemessag eson themultifunc tiondispla y.
00B6
Fu elreser vewarning lam p *T
he yello wfuel reser vewarning lam plight sup while youar edr ivin g.
or
The yello wfuel reser vewarning lam plight sup while theengine isrunning .
The yello wfuel reser vewarning lam plight sup while youar edr ivin g:
Ther ehas been pressu reloss inthefuel system. Thefuel filler cap isno tclos edcor rectl yor thefuel system isleak‐
ing. #
Close thefuel filler cap.
If th efuel filler cap hasalready been closedcor rectl y: #
Consul ta qu alif ied spec ialistwo rkshop.
The yello wfuel reser vewarning lam plight sup while theengine isrunning:
The fuel suppl yhas dropped intoth ere ser verang e. #
Refuel . Displ
aymessa gesand warning/ indic ator lam ps 43
1

Br
ak es Wa
rning/indicat orlam p
Possible causes/conseq uencesand0050 0050
Solutions
0049 Elect ric pa rking brak eindi‐
cat orlam p(red) (USAonl y)
0024
Elec tric par kingbr ak eindi‐
cat orlam p(red) (Canada
onl y)
0024 The elect ric pa rking brak e
(y ello w)indic ator lam p *T
he redelect ric pa rking brak eindic ator lam pflashes orislit.
The yello welect ric pa rking brak eindic ator lam palso lightsup intheeve ntofama lfunctio n. #
Notethemessag eson themultifunc tiondispla y. 432
Displa ymessag esand warning/ indic ator lam ps

Dr
ivin gsy stems Wa
rning/indicat orlam p
Possible causes/conseq uencesand0050 0050
Solutions
L Wa rning lam pfo rdis tance
wa rning func tion *T
he reddis tan cewarning lam plight sup while theve hicle isin mo tion.
The distance totheve hicle infront istoosmall forth espeed selected.
If th er eis an additional warning tone, youar eappr oachingan obs tacle attoohigh aspeed. #
Beprepar edtobrak eimmediat ely. #
Incr ease thedis tance.
Fu nctio nof ActiveBr ak eAssi st(/ pag e17 8).
ä
Sus pens ion wa rning lam p
(y ello w) *T
he yello wAIRMA TICwarning lam pis lit.
The yello wDY NA MIC BODY CONTR OLwarning lam pis lit.
A malfun ction has occurredin AIRMA TIC.
A malfunc tionhasoccurredin theDY NA MIC BODY CONTR OL. #
Notethemessag eson themultifunc tiondispla y. Dis
play messa gesand warning/ indic ator lam ps 435

Gear
shiftre comm endation......................1 46
Genui nepar ts....... ....................................... 21
Glide mode...... ........................................... 147 H
Handbr ake
see Electr icpar king brak e
Handlin gch aract eristics (unus ual)....... ..335
HAND S-FREEAC CESS .................................. 74
Hazar dwa rning light s...............................1 16
Hazar doussubstances
Inf ormation .......................................... .... 24
Head restra int
Fr ont (adjus tingmechanicall y).................9 4
Re ar (installin g/remo ving).......................9 5
Re ar passe nger com partment
(adj ustin g)...............................................9 5
Head-up Display
Ad jus ting disp lay el eme nts(on-bo ard
com puter)....... .................................... ...210
Ad jus ting thebr ightn ess(on-boar d
com puter).. ....................................... ..... 210
Fu nctio n...<0011001100110011001100110011001100110011001100110011001100110011
001100110011001100110011001100110011> <0011001100110011001100110011001100110011001100110011001100110011
0011001100110011>209Menu
(on-bo ardcom puter)....... .......... ... 210
Oper ating thememor yfunc tion.............1 01
Se tting theposition (on-boar dcom‐
put er)..................................................... 210
Swi tching on/of f.<0011001100110011001100110011001100110011001100110011001100110011
0011001100110011001100110011001100110011001100110011001100110011
001100110011> 211
Headlam ps
see Automatic driving lights
Headlin er(car e)..... ....................................3 12
Heating see Climat econtr ol
Help call
see Mercedes-Benz emergencycallsystem
High beam
Ac tivati ng/d eactiv ating........... ..............115
High-be amflasher .....................................115
High-be amheadlam ps
Ad aptiveHig hbeam Assis t............... ...... 117
Hill star tassi st<0011001100110011001100110011001100110011001100110011001100110011
0011001100110011001100110011001100110011001100110011001100110011
0011001100110011001100110011001100110011> 163
HOLD functio n
Fu nctio n/no tes.<0011001100110011001100110011001100110011001100110011001100110011
0011001100110011001100110011001100110011001100110011001100110011
0011001100110011> 162
Swi tching on/of f.<0011001100110011001100110011001100110011001100110011001100110011
0011001100110011001100110011001100110011001100110011001100110011
00110011> 163
Hood Opening/clo sing................................ .... 301 I
Iden tificatio nplat e
Engine ................................................... 368
Re frig er ant....... ......................................375
Ve hicle. .................................................3 68
Ign itio n
Switc hingon(Start/S topbutt on).......... 131
Ignit ionkey
see Smar tKey
Imm obiliz er..................................................8 5
Indi catorlam ps
see Warning/ indic ator lam ps
Individ ualdrive pr og ram
Con figur ing.. .......................................... 143
Sel ecting <0011001100110011001100110011001100110011001100110011001100110011
0011001100110011001100110011001100110011001100110011001100110011
001100110011001100110011001100110011001100110011001100110011> 142
Insid ere ar vie wmir ror
see Exterior mir rors
Insp ectio n
see ASSYST PLUS
Ins trument cluster
Fu nctio n/no tes.<0011001100110011001100110011001100110011001100110011001100110011
001100110011001100110011001100110011001100110011> 206,207 Inde
x455

Ins
trum ent Disp lay
Fu nctio n/no tes.<0011001100110011001100110011001100110011001100110011001100110011
0011001100110011001100110011001100110011001100110011001100110011
0011001100110011> 207
Ins trume ntclu ster ................................... 10
Wa rning/ indic ator lam ps.................. .... 425
Ins trum ent Displa yand on-boa rd
com puter
Fu nctio n/no tes.<0011001100110011001100110011001100110011001100110011001100110011
0011001100110011001100110011001100110011001100110011001100110011
0011001100110011> 206
In te llig ent Light System
Ad aptiveHig hbeam Assis t..................... 117
Cor nering light..... <0011001100110011001100110011001100110011001100110011001100110011
001100110011001100110011001100110011> .........117
Int erior ligh ting
Ad jus ting ............ .................................... 119
Ambi entlighti ng........... <0011001100110011001100110011001100110011001100110011001100110011
0011001100110011> ......119
Re adin glam p.<0011001100110011001100110011001100110011001100110011001100110011
0011001100110011001100110011001100110011001100110011001100110011
00110011001100110011001100110011> 119
Swi tch-of fdel aytim e..... ........... .............120
Int erior motion sensor
Ac tivati ng/d eactiv ating........... ................88
Fu nctio n...<0011001100110011001100110011001100110011001100110011001100110011
001100110011001100110011001100110011> <0011001100110011001100110011001100110011001100110011001100110011
001100110011001100110011> 87
Int ermed iatedes tination
Calculat ingaro utewit hint ermed iate
des tinatio ns...........................................2 37
Ent ering ............ .....................................236
Modi fying.. ....... .....................................237 St
artin gan aut omat icga sst atio n
sear ch<0011001100110011001100110011001100110011001100110011001100110011
0011001100110011001100110011001100110011001100110011001100110011
0011001100110011001100110011001100110011001100110011001100110011
001100110011> 236
St artin gth eaut omatic service sta‐
tio nsear ch<0011001100110011001100110011001100110011001100110011001100110011
0011001100110011001100110011001100110011001100110011001100110011
001100110011001100110011001100110011001100110011> 242
Int erne tconnect ion
Comm unicationmod ulefunction ...... .... 279
Con nection status.. .......................... .....2 80
Displ aying thecon nect ionstatus.. .... .... 280
In fo rm atio n...................................... ...... 279
Re strictions <0011001100110011001100110011001100110011001100110011001100110011
001100110011001100110011001100110011001100110011> ...............279
Int erne tra dio
see TuneIn
iP hon e®
see AppleCa rPlay®
see Mercedes-Benz Link J
Jac k
St or ag elocation. ................................... 358
Jum p-startconnec tion
Gener alno tes.. ...................................... 323 K
KEYLESS- GO
Loc kingth eve hicle ..................................6 8
Pr oblem. .................................................. 69
Un loc kin gse tting.... ................................ 65
Un loc kin gth eve hicle .............................. 68
Kic kdo wn
Using... .................................................. 147
Knee airbag .................................................. 41 L
Labelin g(tir es)
see Tire labeling
Lam p
see Interior light ing
Lam ps(Ins trum ent Displa y)
see Warning/ indic ator lam ps
Lane detection (automatic )
se eAc tiveLa ne Keeping Assist
Lane Keeping Assist
see ActiveLa ne Keeping Assist
Languag e
No tes... .................................................2 25 456
Index

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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