2021 MERCEDES-BENZ A-CLASS SEDAN warning

Wa
rning/indicat orlam p
Possible causes/conseq uencesand0050 0050
Solutions
If ESP ®
cann otbe activ ated, ESP®
is malfunc tioning. #
Have ESP ®
ch eckedimmediat elyat aqu alif ied spec ialistwo rkshop. #
Obser vetheno teson deactiv atingESP®
(/ page15 4). Ti
re pres sur emoni tor Wa
rning/indicat orlam p
Possible causes/conseq uencesand0050 0050
Solutions
0077 Ti re pressur emonit oring
sy stem warning lam p
fl ashes *The
yello wtirepr essur emon itor wa rning lam p(pr essur eloss/ malfun ction) flashes forapp roxima tely one minu te and
th en remains lit.
The tirepr essu remonit orismalfu nctioning. &
WA RNIN GThe reisarisk ofan accident ifth etir epr essur emonit oring system ismalfunct ioning
The tirepr essur emonit oring system cann otissue awa rning ifth er eis pressur eloss inone ormor eof thetir es.
Ti re swit hinsuf ficie nttirepr ess urema yim pairth edr iving charact eristic sas wellas steer ing and braking. #
Have thetir epr essur emonit oring system checkedat aqu alif ied spec ialistwo rkshop. 392
Displa ymessag esand warning/ indic ator lam ps

Wa
rning/indicat orlam p
Possible causes/conseq uencesand0050 0050
Solutions
0077 Ti re pressur emonit oring
sy stem warning lam plight s
up *T
he yello wtirepr essur emon itor ing system warning lam p(pr essur eloss/ malfun ction) islit.
The tirepr essur emon itor ing system has detected tirepr ess urelos sin at leas tone ofthetir es. &
WA RNIN GRisk ofan acci dent dueto insuf ficie nttirepr ess ure
R The tires can burst.
R The tires can wearexc essiv elyand/or unevenly .
R The drivi ng charact eristic sas wellas thesteer ing and braking maybe greatl yim pair ed.
Yo uco uld then lose control of theve hicle. #
Obser vethere comme ndedtirepr ess ures. #
Adjus tth etir epr essur eif neces sary. #
Stop theve hicle inaccor dance withth etra ffic con dition s. #
Chec kth etir epr essur eand thetir es. Displa
ymessag esand warning/ indic ator lam ps 393

003D
Stop Vehicle LeaveEngi neRun‐
ning <0011001100110011001100110011001100110011001100110011001100110011
00110011001100110011001100110011> <0011001100110011001100110011001100110011001100110011001100110011
001100110011001100110011001100110011> ....371
003D Stop Vehicle SeeOper ator's
Manual .................................................3 71
ç Suspend ed<0011001100110011001100110011001100110011001100110011001100110011
0011001100110011001100110011001100110011001100110011001100110011
0011> 358
: SwitchOf fLig hts <0011001100110011001100110011001100110011001100110011001100110011
00110011001100110011001100110011> 339
: SwitchOn Hea dlamps ................ 339
0080 Trans miss ionOilOverheat ed
Dr ive wit hCautio n...............................3 49
0049 Turn On theIgnit iontoRelease
th ePa rking Brak e................................ 355
0072 Vehicle Ready toDrive Swi tch
th eIgnit ionOffBef oreEx iting .............. 341
0077 Warning Tire Malfunction ............ 374
0077 Wheel Sensor(s) Missing ............ 372
Ac tiveBli nd Spo tAssi stCur rently
Un available SeeOper ator' sMan ual.....3 61
Ac tiveBli nd Spo tAssi stInoper ative.... 361 Ac
tiveBr ak eAssi stFunctio nsCur‐
re ntl yLim ited See Operator's Man‐
ua l...... ................................................. 368
Ac tiveBr ak eAssi stFunctio nsLim i‐
te dSee Oper ator's Manual .................. 369
Ac tiveDis tance AssistCur rently
Un available SeeOper ator' sMan ual.....3 58
Ac tiveDis tance AssistInoper ative..... .3 58
Ac tiveDis tance AssistNo wAv ailable
.. .. .........................................................3 58
Ac tiveLa ne Keeping AssistCur rentl y
Un available SeeOper ator' sMan ual.....3 61
Ac tiveLa ne Keeping AssistInopera‐
tiv e .......................................................3 61
Ac tiveSt eer ing Assis tCur rentl y
Un available SeeOper ator' sMan ual.....3 59
Ac tiveSt eer ing Assis tInoperativ e.......3 59
Ac tiveSt eer ing Asst.Cur rentl y
Un available DuetoMultiple Emer‐
ge ncy Stops ......................................... 359 Ad
aptiveHig hbeam Assis tCur rently
Un available SeeOper ator' sMan ual.....3 40
Ad aptiveHig hbeam Assis tIn oper a‐
tiv e ...................................................... 340
App lyBrak eto Shif tfr om 'P' ............... 346
Apply Brak eto Shif tto 'R' ...................3 47
App lyBrak eto Shif tto Dor R............. .347
App lyPa rking Brak eRisk ofRo lling
Aw aySee Operator's Manua l..... ......... 349
Au xiliary Batt eryMal functi on.............. 350
Begi nning Emergency Stop .................. 359
Blind SpotAssis tCur rentl yUna vaila‐
ble See Opera tor's Manua l..... ............. 360
Blind SpotAssis tInoper ative..... .......... 360
Chec kTire Pressur eSoon ...................3 75
Chec kTire Pressur eThen Restar t
Ru nFla tIndi cator <0011001100110011001100110011001100110011001100110011001100110011
00110011001100110011001100110011> ........376
Cr uise Control Inoper ative...................3 57
Cr uise Control Off...............................3 57
Decr ease Spe ed............ ...................... 375 402
Index

De
vic eDe tected atDia gnos ticsCon‐
nectio nSee Operator's Manua l...... ..... 369
Dr iver's Door Open &Trans miss ion
No tin PRisk ofVehicle Rolling Away ... 347
Fr ont Passeng erAirbag Disabled See
Oper ator's Manual ...............................3 34
Fr ont Passeng erAirbag Enabled See
Oper ator's Manual ...............................3 34
Hazard Warning Flashe rsMalfunc‐
tioning .................................................3 40
N Pe rm anen tly Ac tiveRi sk ofRo lling
Aw ay <0011001100110011001100110011001100110011001100110011001100110011
0011001100110011001100110011001100110011001100110011001100110011
0011001100110011001100110011001100110011001100110011001100110011
0011001100110011> 347
Only Shiftto 'P' when Vehicle isSta‐
tio nar y.................................................3 46
Pa rking Assistand PARK TRONI C
In operativ eSe eOperat or'sMan ual.....3 64
Pa rking LockIno per ativ eAppl yPa rk‐
ing Brak e.............................................3 49
Pla cetheKe yin theMar kedSpace
See Oper ator's Manual ........................ 337 PRE-S
AFEInoper ativeSee Oper a‐
to r's Manua l...... .................................. 335
Re versing NotPo ssible Service
Re quired .............................................. 348
Ru nFla tIndi catorInop erati ve .............. 376
Ser vice Required Do NotShif tGear s
Vi sit Dealer .......................................... 348
Te ac hin gin Trans miss ionCom plete .... 349
Te ac hin gin Trans miss ionOper ate
Sel ectorLeverAppl yBr ak efo rXX s
Ris kof Vehicle Rolling Away ................ 349
Ti re Press. Monit orCur rently
Un available .......................................... 372
Ti re Press. Monit orInopera tive ............ 372
Ti re Pressur eMonit orInopera tiveNo
Wheel Sensors .....................................3 72
Ti re sOv erheat ed................................. 374
To Dese lect Por N, Dep ress Brak e
and StartEn gin e.................................. 347 To
switc hengine off,pr ess and hold
St art/ Stop butt onforat lea st3sec‐
onds orpress 3times. ........................344
Tr af fic Sign AssistCur rently Unavail‐
able SeeOperat or'sMan ual................ 360
Tr af fic Sign AssistInoper ative.... .........3 60
Tr ans miss ionMalfun ction .................... 348
Tr ans miss ionMalfun ction Service
Re quired .............................................. 350
Tr ans miss ionMalfun ction Stop ........... 348
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)................ 63
Loc king(emer gency key) .......................7 2
Opening (from inside) ............................7 0
Un loc kin g(emer gency key) .................... 72
Un loc kin g(fr om insid e).........................7 0 Inde
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Genuin
ewo od (Car e).............................. 263
Glid emod e...............................................1 41 H
Handbr ake
see Electr icpar king brak e
Handlin gch aract eristics (unus ual)....... 287
HAND S-FREEAC CESS ................................ 75
Hazar dwa rning light s.............................. 111
Hazar doussubstances
Inf ormation .................................... ........25
Head restra int
Fr ont (adjus tingmechanicall y)............... 91
Re ar (installin g/remo ving) .....................9 2
Re ar passe nger com partment
(adj ustin g) .............................................9 2
Head-up Display...... ................................206
Ad jus ting disp lay el eme nts(on-bo ard
com puter) ..... ...... .............................. ...206
Ad jus ting thebr ightn ess(on-boar d
com puter) ....................................... ..... 206
Fu nctio n<0011001100110011001100110011001100110011001100110011001100110011
001100110011001100110011001100110011> <0011001100110011001100110011001100110011001100110011001100110011
00110011001100110011>205
Menu (on-bo ardcom puter) ...... ............ 206 Oper
ating thememor yfunc tion ............ 98
Se tting theposition (on-boar dcom‐
put er) ............................................. ..... 206
Switc hingon/off........................... ...... 207
Headla mps
see Automatic driving lights
Headlin er(car e)....................................... 263
Help call
see Mercedes-Benz emergencycallsystem
High beam
Ac tivati ng/d eactiv ating ........... ............110
High-be amflasher ................................... 110
High-be amheadlam ps
Ad aptiveHig hbeam Assis t.............. .....1 12
Hill star tassi st<0011001100110011001100110011001100110011001100110011001100110011
0011001100110011001100110011001100110011001100110011001100110011
00110011001100110011001100110011> 157
HOLD functio n...... ................................... 156
Fu nctio n/no tes ................................... 156
Swi tching on/of f<0011001100110011001100110011001100110011001100110011001100110011
0011001100110011001100110011001100110011001100110011001100110011
0011> 156
Home screen (media display)
Ov ervie w ...... .................................... ... 209
Hood Opening/clo sing.................................. 251 I
Iden tificatio nplat e
Engine ................................................. 322
Re frig er ant .......................................... 329
Ve hicle ................................................ 322
Ignition Switc hingon(Start/S topbutt on) ........ 125
Ignit ionkey
see Smar tKey
Imm obiliz er................................................ 84
Indi catorlam ps
see Warning/ indic ator lam ps
Individ ualdrive pr og ram
Con figur ing .......................................... 136
Sel ecting <0011001100110011001100110011001100110011001100110011001100110011
0011001100110011001100110011001100110011001100110011001100110011
0011001100110011001100110011001100110011001100110011> 135
Insid ere ar vie wmir ror
see Exterior mir rors
Insp ectio n
see ASSYST PLUS
Ins trument cluster
Fu nctio n/no tes ........................... 201, 202 Inde
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Ins
trum ent Disp lay
Fu nctio n/no tes ................................... 202
Ins trument cluster ...... ........................... 10
Wa rning/ indic ator lam ps................ .....3 79
Ins trument Displa yand on-b oard
co mp uter
Fu nctio n/no tes ...... ............................. 201
Int ellig entLight System
Ad aptiveHig hbeam Assis t.............. .....1 12
Cor nering light <0011001100110011001100110011001100110011001100110011001100110011
001100110011001100110011001100110011> ............112
Int erior ligh ting........ ................................ 114
Ad jus ting ............ .................................. 114
Ambi entlighti ng<0011001100110011001100110011001100110011001100110011001100110011
0011001100110011> ...............114
Re adin glam p.......................................1 14
Swi tch-of fdel aytim e........... ................115
Int erior motion sensor
Ac tivati ng/d eactiv ating ........... ..............86
Fu nctio n<0011001100110011001100110011001100110011001100110011001100110011
001100110011001100110011001100110011> <0011001100110011001100110011001100110011001100110011001100110011
0011001100110011001100110011> 86
In te rn et radio
see TuneIn
iP hon e®
see Sma rtphone integratio n J
Jac k
St or ag elocation .............................. ..... 310
Jum p-startconne ction ............................2 76
Gene ralno tes ...................................... 274 K
KEYLESS- GO
Loc kingth eve hicle ........................ ........ 70
Pr oblem .................................................7 1
Un loc kin gse tting ............................ .......6 7
Un loc kin gth eve hicle ............................7 0
Kic kdow n.................................................. 141
Using ................................................... 141
Knee airbag ................................................ 42 L
Label ing(tires)
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
LA TC H-type (ISOFI X)child seat secur‐
ing system
In stallin g................................................ 56
Light switch
Ov ervie w ............................................. 109
Light ing
see Inte rior lighting
see Lights
Lights .......................................................1 09
Ad aptiveHig hbeam Assis t...................1 12
Au tomatic driving lights..... .................. 110
Comb inationswit ch<0011001100110011001100110011001100110011001100110011001100110011
0011001100110011001100110011001100110011001100110011> 110
Cor nering light <0011001100110011001100110011001100110011001100110011001100110011
00110011001100110011001100110011> .............112
Haza rdwa rning light s...........................1 11
High beam............ ...............................110
High -beamflasher ................................ 110
Light switch..... .................................... 109
Lo w-beam headlam ps.........................1 09
Pa rking light s.......................................1 09
Re ar foglam p...................................... 109 408
Index

Online
services
Dat ast or ag e ............ .............................. 33
Open-sour cesof tware .............................. 35
Opening thetrunk lidusing your foot
HANDS-FREE ACCES S.................... .......7 5
Oper ating fluids
Ad ditiv es(fuel) ................................ .... 326
Br ak efluid ...................................... .....3 27
Coolan t(en gine) ............................ ...... 327
En gin eoil ............................................ 326
Fu el(gasoline) ................................. ....3 25
No tes ..................... ............................. 323
Re frig er ant (airconditio ningsystem) ...329
Wi ndsh ield wa sher fluid .................. .... 328
Ope ratin gsaf ety
Decl arati on ofconf ormity (wirel ess
ve hicle component s)............................. 26
Inf ormation ............................................ 25
Oper ating system
see On-bo ardcom puter
Oper ator' sMan ual
Ve hicle equipment ................................. 23
Oper ator's Manual (digital) ......................2 0 Ov
erhead controlpanel
Ov ervie w .......................................... ...... 14 P
Pa int code ................................................ 322
Pa intw ork(cleaning instructions) .........2 60
Pa nic alar m................................................ 67
Ac tivati ng/d eactiv ating ........... ..............67
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
0011> .............138
Sel ecting automatical ly<0011001100110011001100110011001100110011001100110011001100110011
0011001100110011001100110011> 138
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<0011001100110011001100110011001100110011001100110011001100110011
00110011> 189
Ac tivati ng ........... ................................. 193
Ad jus ting warning tones <0011001100110011001100110011001100110011001100110011001100110011
001100110011001100110011> 194
Fu nctio n<0011001100110011001100110011001100110011001100110011001100110011
0011001100110011001100110011001100110011> <0011001100110011001100110011001100110011001100110011001100110011
0011001100110011>189
Sid eim pa ct protect ion ..................... ... 192 Swi
tching off<0011001100110011001100110011001100110011001100110011001100110011
0011001100110011001100110011001100110011001100110011001100110011
0011001100110011001100110011> 193
Sy stem limit ations ...............................1 89
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 .............. 150
Pa rking light s...........................................1 09
Pa rking posit ion
Ex terior mir rors <0011001100110011001100110011001100110011001100110011001100110011
0011001100110011001100110011001100110011001100110011001100110011
0011001100110011> 119
St or ing theposition ofthefront -
passeng eroutside mirrorusi ng
re ve rsege ar .........................................1 20
PA SSEN GERAIRBAGstatus displa y
see Automatic front pass engerfront
airb agshut off
Pa yload
Calculat ionexam ple ............................ 297
De term inin gth emaximum .................. 296
Pe riod out ofuse
Ac tivati ng/d eactiv ating standb y
mode ...................................................1 51
St andb ymode function ........................ 151 41
2
Inde x

Seat
belt..................................................... 38
Car e................................................ ....2 63
Fa stening ............................................... 40
Pr otect ion ....................................... .......3 8
Seat beltadjustment
Ac tivati ng/d eactiv ating ........... ..............41
Fu nctio n<0011001100110011001100110011001100110011001100110011001100110011
001100110011001100110011001100110011> <0011001100110011001100110011001100110011001100110011001100110011
00110011001100110011001100110011> 41
Seat beltwarning
see Seat belts
Seat belts ...................................................4 2
Ac tivati ng/d eactiv ating seat belt
ad jus tment ............................................ 41
Re duced protect ion ...............................3 9
Re leasing ...............................................4 2
Sea tbel tad jus tment (function) ............. 41
Wa rning lam p.................................. ...... 42
Seat cover(C are) ............ .........................263
Seat heatin g
Ac tivati ng/d eactiv ating ........... ..............93
Se at ventilat ion
Ac tivati ng/d eactiv ating ........... ..............94
Selec tingage ar
see Changing gears Select
orleve r
see DIRECT SELECTleve r
Self-t est
Au tomatic front pass engerfront air‐
bag shut off..... ....................................... 47
Sensor s(car e).......................................... 261
Ser vice center
see Qualif iedspecialis two rkshop
Ser vice interva ldisp lay
see ASSYST PLUS
Se tting aspeed
see Cruise control
Se tting thema pscale
see Map
Shif tpa dd les
see Steer ing wheel paddle shifters
Shif ting gears
Gea rshif tre comme ndation <0011001100110011001100110011001100110011001100110011001100110011
00110011> 140
Side airbag .................................................4 2
Side impact protection ...........................1 92 Side
windo ws <0011001100110011001100110011001100110011001100110011001100110011
0011001100110011001100110011001100110011001100110011001100110011
0011001100110011001100110011001100110011001100110011> 77
Child safetyloc kin there ar
passe nger com partment .......................6 4
Closin g.................................................. 77
Closin gusin gth eSmar tKey <0011001100110011001100110011001100110011001100110011001100110011
001100110011> 79
Co nvenienc eclosing featur e.................7 9
Con venie nce openi ng <0011001100110011001100110011001100110011001100110011001100110011
00110011001100110011001100110011> ....78
Opening .................................................7 7
Opening withth eSmar tKey <0011001100110011001100110011001100110011001100110011001100110011
001100110011> 78
Pr oblem .................................................7 9
Size designation (tires) ........................... 302
Sliding sunroof.......................................... 80
Au tomatic featur es................................ 82
Closin g.................................................. 80
Closin gusin gth eSmar tKey <0011001100110011001100110011001100110011001100110011001100110011
001100110011> 79
Ope ning <0011001100110011001100110011001100110011001100110011001100110011
0011001100110011001100110011001100110011001100110011001100110011
0011001100110011001100110011001100110011001100110011001100110011
0011> 80
Ope ning with theSmar tKey <0011001100110011001100110011001100110011001100110011001100110011
001100110011> 78
Pr oblem .................................................8 3
Ra in-clos ingfeatur e...............................8 2
Smar tKey <0011001100110011001100110011001100110011001100110011001100110011
0011001100110011001100110011001100110011001100110011001100110011
0011001100110011001100110011001100110011001100110011001100110011
001100110011> 66
Ac ous ticlocking verificati onsignal ........ 67
Batt ery <0011001100110011001100110011001100110011001100110011001100110011
0011001100110011> <0011001100110011001100110011001100110011001100110011001100110011
00110011001100110011> .........68
Ener gyconsu mption........... ...................67
Fe atur es................................................ 66
Ke yring attachme nt<0011001100110011001100110011001100110011001100110011001100110011
00110011001100110011001100110011> ......68 Inde
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