belt MERCEDES-BENZ A-CLASS HATCHBACK 2021 Workshop Manual

Dr
Dr
iving syst
iving syst ems
ems W
W
ar
ar ning/indicat
ning/indicat or lampP
or lam pP ossible causes/conseq
ossible causes/consequences and uences andM
MSolutions
Solutions
L
Wa rning lamp for distance
wa rning function *T
he red distance warning lamp lights up while theve hicle is in motion.
The dis tance totheve hicle in front is too small forth e speed selected.
If th ere is an additional warning tone, you are approaching an obstacle at too high a speed. #
Be prepared tobrake immediatel y. #
Increase the distance.
Fu nction of Active Brake Assist (/ page 241).
Ó Ac tive Brake Assist warning
lamp *T
heActive Brake Assist warning lamp is on.
Due todirty sensors or a malfunction, the system is not available or thera nge of functions is restric ted. #
Notethe messages on the instrument displa y.
ê
Ac tive Brake Assist warning
lamp *T
heActive Brake Assist warning lamp is on.
The system is switched o. or thera nge of functions has been automatically restric ted.
This may be the case if the driver is not wearing a seat belt or ano ther driving system has been activated. #
Obser vethe no tes on Active Brake Assist (/ page 241). Display messages and
warning/indicator lamps
487
487

A
A
ut
ut omatic engine st
omatic engine st op
op
see ECO start/s top function
A
A ut
ut omatic fr
omatic fr ont passeng
ont passeng er airbag
er airbagshut
shuto.
o.
PA SSENGER AIR BAG indicator la mps...... 57
A
A ut
ut omatic measur
omatic measur es
esaTer
aTer an accident
an accident ............ 61
A
A ut
ut omatic mirr
omatic mirr or f
or folding function
olding function
Ac tivating/deactivating.......................... 152
A
A ut
ut omatic tr
omatic tr ansmission
ansmission
DIRECT SELECT le ver............................. 183
Drive prog rams...................................... 178
DY NAMIC SELECT switch....................... 178
Engaging drive position.......................... 185
Engaging reve rsege ar............................ 184
Kickdown............................................... 186
Manual gear changing........................... .185
Selecting park position........................... 184
St eering wheel gearshiT paddles............ 185
Tr ansmission position displ ay................. 183
Tr ansmission position s........................... 183
A
A ut ut omatic tr
omatic tr ansmission (pr
ansmission (problem) oblem)
see Transmission (problem)
Axle load
Axle load Perm issible............................................ 392
Tr ailer operatio n..................................... 408 B
B
Bag hook
Bag hook..................................................... 126
Ball neck
Ball neck Folding out/in........................................ 271
B B AS (Br AS (Br ak
ake Assis
e Assist Syst t System)
em)........................... 222
Batt
Batt ery
ery
see High-voltage battery
Batt
Batt er
ery (high-v
y (high-v olt
oltag
age on-boar
e on-boar d electr
d electrical
ical
syst
syst em)
em)
see High-voltage battery
Batt
Batt er
ery (ke
y (ke y)
y)
Re placing................................................. 84
Batt
Batt er
ery (v
y (v ehicle)
ehicle)
Charging (Remo teOnline)..................... .167
No tes..................................................... 354
No tes (starting assis tance and charg-
ing)........................................................ 355
Batt
Batt er
ery oper
y oper ation
ation......................................... 162
Belt
Belt
see Seat belt
Bicy
Bicy cle r
cle r ack
ack
Load capacit y........................................ 407 Tr
ailer operatio n.................................... .274
Blind Spo
Blind Spo t Assist
t Assist
Ac tivating/deactivating.......................... 252
Fu nction................................................ 249
System limi tations.................................. 249
Blow
Blow er
er
see Clima tecont rol
BlueTEC
BlueTEC see AdBlue ®
Bonnet
Bonnet Function (active bonnet)......................... 331
Opening/closing.................................... 332
Re setting (active bonn et)........................ 331
Boo
Boo t lid t lid
see Tailgate
Br
Br ak
ak e Assis
e Assist Syst t System
em
see BAS (Brake Assist System)
Br
Br ak
ak e
e0uid
0uid
No tes..................................................... 401
Br
Br ak
ak e f
e f or
orce disce distr tribution
ibution
EBD (Elect ronic Brake forc e Distribu-
tion)....................................................... 224 Index
495
495

Br
Br
ak
ak es
es
ABS (Anti-lo ckBraking System).............. 221
Ac tive Brake Assist................................. 241
Ad aptive brake lights.............................. 226
BAS (Brake Assist System).................... .222
Driving tips............................................ 169
EBD (Electronic Brake forc e Distribu-
tion).......................................................2 24
HOLD function....................................... 225
Limited braking e.ect (salt-treated
ro ads)................................................... .169
Ne w/replaced brake linings/brake
discs...................................................... 168
Po st-collision brak e.................................. 61
Ru nning-in no tes.................................... 168
Br
Br ak ak es
es
see Recuperation
Br Br aking assist aking assist ance
ance
see BAS (Brake Assist System)
Br
Br eakdo
eakdo wn
wn
Assistance overview. ................................ 20
To w- starting........................................... 364
To wing away.......................................... 360
Tr anspo rting theve hicle........................ .362
Wheel chang e........................................ 378 Br
Br ea kdo
eakdo wn
wn
see Flat tyre
Butt
Butt ons
ons
St eering wheel....................................... 279 C
C
Calls
Calls Mercedes me......................................... 311
Camera
Camera
Information............................................ 220
Camera
Camera
see 360° Camera
see Dashcam
see Reversing camera
Car key
Car key
see Key
Car w Car w ash
ash
see Care
Car w
Car w ash (car
ash (car e)
e)............................................ 337
Car
Car -t
-to-X
o-X -Communication
-Communication
Displaying hazard warnings.................... 305
Care
Care 360° camera......................................... 342 Air-water duct........................................ 337
Au
tomatic car wash.............................. .337
Carpet................................................... 343
Decorative foil........................................ 341
Display................................................... 343
Exterior lighting...................................... 342
Head-up display..................................... 343
High-pressure cleaner............................3 39
Pa int...................................................... 340
Plastic trim............................................3 43
Re alwo od/trim elements..................... .343
Re versing camera..................................3 42
Ro of lining............................................. 343
Seat belt................................................ 343
Seat co ver............................................. 343
Sensors................................................. 342
St eering wheel....................................... 343
Ta ilpipes................................................ 342
Tr ailer hitc h............................................ 342
Ve hicle soc ketfo rth e high-voltage
battery................................................... 342
Wa shing byhand.................................... 340
Wheels/rims.......................................... 342
Wi ndo ws................................................ 342
Wi per blades.......................................... 342 496 496
Index

Car
Car
pe
pet (Car
t (Car e)
e)............................................... 343
Changing bulbs
Changing bulbs Dipped beam.........................................1 45
Fi tting/removing co ver (front wheel
ar ch )...................................................... 144
Main beam............................................. 145
No tes..................................................... 143
Overview................................................ 144
Re versing lights......................................1 45
Tu rn signal lights (rear)........................... 145
Changing g
Changing g ears ears
Manually................................................ 185
Changing hub caps
Changing hub caps ....................................... 378
Char
Char ging
ging
Char geleve l displa y............................... 211
Charg ing cable control panel.................. 200
Ending thech arging process (alternat-
ing cur rent, mode 2/3).......................... 206
Ending thech arging process (direct
cur rent, mode 4).................................... 210
Indica tor lamps on vehicle soc ket........... 201
No tes - charging station (mode 3)......... .197
No tes - fast charging station (mode 4)... .199
No tes - mains soc ket (Mode 2)............... 196 No
tes - wallbox (mode 3)........................ 197
No tes on charging the high-voltage
battery................................................... 194
On-board electrical system battery
(12 V).................................................... 357
Setting the maximum possible charg-
ing cur rent (mains soc ket)...................... 199
St arting thech arging process (alter-
nating cur rent, mode 2/3)..................... 203
St arting thech arging process (direct
cur rent, mode 4).................................... 207
St ow ing thech arging cable.................... 194
USB port............................................... .130
Char
Char ging cable ging cable
Control panel......................................... 200
St ow ing................................................. 194
Child safe
Child safe ty lock ty lock
Re ar door................................................ .79
Re ar side wind ows................................... 80
Child seat
Child seat Appr oval catego ries.................................67
At tach ing (no tes)..................................... .66
Basic instructions.................................... 61
Fr ont passenger seat (no tes).................... 76 Fr
ont passenger seat (without auto-
matic airbag shuto.)............................... .76
ISOFIX/i-Size (/tting).............................. .70
No tes on risks and danger s...................... 62
Re commendations forch ild restraint
systems................................................... 65
Seats suitable for belt-secured child
re straint systems..................................... 73
Seats suitable for i‑Size child restraint
systems................................................... 70
Seats suitable for ISOFIX child
re straint systems..................................... 68
Securing on the co-driver seat..................77
Securing on there ar seat......................... 75
To pTe ther................................................ 72
Childr
Childr en
en
Av oiding dangers in theve hicle............... .62
Basic instructions.................................... 61
Chock Chock Storage location..................................... 377
Chock Chock see Chock
City lighting
City lighting.................................................. 138 Index
497
497

see
Telephone
Model type
Model type see Vehicle identi/cation plate
MOExt
MOExt ended tyr
ended tyr es
es....................................... .348
Mot
Mot orwa
or wa y mode
y mode .......................................... .138
MUL
MUL TIBEAM LED
TIBEAM LED.......................................... 137
Multifunction st
Multifunction st eer
eering wheel
ing wheel
Overview of buttons............................... 279
Multifunction st
Multifunction st eer
eering wheel
ing wheel
see Steering wheel
Multimedia syst
Multimedia syst em
em
see MBUX multimedia system N
N
N
N a
avig
vig ation
ation
Ac tivating............................................... 300
No tes..................................................... 299
Overview................................................ 301
Sh ow ing/hiding the menu...................... 300
Na Na vig
vigation
ation
see Destination entry
see Map
see Route N
N eutr eutr al
al
Engaging................................................ 184
N
Noise oise
Wheels and tyres................................... 368
Wheels/tyres......................................... 368 O O
Occupant safe
Occupant safe ty
ty
see Airbag
see Automatic co-driver airbag shuto.
see Automatic measures aTer an accident
see Child seat
see Pets in theve hicle
see Post-collision brake
see PRE-SAFE ®
(anticipa tory occu-
pant pr otection)
see PRE-SAFE ®
PLUS (anticipatory
occupant pr otection plus)
see Restraint system
see Seat belt
Oil Oil see Engine oil
On-boar
On-boar d com
d comput
puter
er
Displa yingthe service due dat e.............. 330 Head-up display menu............................ 283
Instrument displa
y................................. 282
Menu overview.......................................2 79
Operating.............................................. 279
On-boar
On-boar d diagnos d diagnostics int tics interf
erface
ace
see Diagnostics connection
On-boar
On-boar d electr
d electrical syst
ical syst em batt
em batter
ery (12 V)
y (12 V)
Charging................................................ 357
Re placing.............................................. .358
St arting assis tance............................... .357
On-boar On-boar d electr
d electronics
onics
Engine electronics................................. 389
No tes..................................................... 389
Tw o-w ayradios...................................... 389
on-demand f on-demand f eature
eature
Ac tivating................................................. 26
No tes...................................................... .26
Online ser
Online ser vices
vices
Data storag e............................................ 44
Online ser
Online ser vices
vices
see In-Car O1ce
Open-sour
Open-sour ce
cesoTw
soTw are
are.................................... 45 514
514
Index

PRE-S
PRE-S
AFE
AFE®
®
PL
PL US (anticipat
US (anticipat or
ory occupant
y occupant
pr ot
pr otection plus)
ection plus)
Fu nction.................................................. 60
Re versing measures................................. 60
Pr ev
Pr event ent ativ
ativ e occupant pr ot
e occupant pr otection syst
ection syst em
em
see PRE-SAFE ®
(anticipatory occu-
pant pr otection)
see PRE-SAFE ®
PLUS (anticipatory
occupant pr otection plus)
Pr
Pr o/le
o/le
Creating a new pro/le............................ 293
No tes..................................................... 292
Selecting pro/le options......................... 293
Pr
Progr ogr amme amme
see DYNAMIC SELECT
Pr ot
Pr otection of t
ection of t he en
he envir
vironment
onment
No tes...................................................... .24
Ta ke -back of end-of-life vehicles............... 24 Q
Q
QR code
QR code Rescue car d............................................ .42
Quali/ed
Quali/ed specialist w
specialist w ork
orkshop
shop .........................40 R
R
R
R adar and ultr
adar and ultr asonic senso rs
asonic senso rs
Damage................................................. 220
R
R adio
adio
Overview of the functions and symbols.. .326
R R ain closing function ain closing function
Side windo ws........................................... 93
R
R ain-closing f
ain-closing f eature
eature
Sliding sunroof......................................... 98
REAC
REAC H r
H regulation
egulation........................................... 41
R
R eading lamp
eading lamp
see Interior lighting
R
R eading light
eading light
Switching on/o. (contactless). .............. 291
R
R eal w
eal w ood (Car
ood (Car e)
e).......................................... 343
R
R ear door (c
ear door (c hild safe
hild safety loc
ty lock)
k)........................... 79
R
R ear f
ear f og light
og light
Switching on/o..................................... 135
R
R ear seat
ear seat
see Seat
R
R ear seat belt
ear seat belt
Status displ ay.......................................... 52 R
R
ear seat belt st
ear seat belt st atus display
atus display........................... 52
R
R ear window
ear window
Replacing wiper blade............................ 148
R
R ear windo
ear windo w heat
w heater
er...................................... 153
R
R ear windo
ear windo w wipers
w wipers
Ac tivating/deactivating.......................... 146
R
R ear
ear -vie
-vie w mirr
w mirr or
or
Anti-dazzle mode (automatic)................. 150
R
R ear
ear -vie
-vie w mirr
w mirr or
or
see Outside mir rors
R
R ecuper
ecuper ation
ation
Fu nction................................................ 174
Setting.................................................. .175
R
R ecy
ecy cling
cling
see Take -back of end-of-life vehicles
R
R educing ag
educing ag ent
ent
see AdBlue ®
R
R efuelling
efuelling
Refuelling theve hicle............................ .188
R
R egistr
egistr ation
ation
Ve hicle..................................................... 40 Index
517
517

Seat
Seat
4-waylumbar suppor t............................ 108
adjusting (electrically)............................ 108
Ad justing (Seat Com fort)........................ 105
Ad justing the seat backrest angle
(rear)..................................................... 122
Ad justment (without Seat Com fort
Pa ckage)................................................ 103
Con/guring settings.............................. .110
Cor rect driver's seat position................. 102
Fo lding back the backrest (rear)............. 121
Fo lding the backrest (front passenger
seat) forw ards....................................... .119
Fo lding the backrest forw ards (rear)...... .120
Locking the backrest (rear).................... 122
Operating the memory function.............. 115
Re setting the settings............................ 110
Setting options......................................... 18
Seat belt
Seat belt
Activating/deactivating seat belt
adjustment.............................................. 52
Care...................................................... 343
Fa stening................................................. 51
Pro tection................................................ 48
Re ar seat belt status displ ay..................... 52 Re
duced pr otection.................................. 49
Re leasing................................................. 52
Seat belt adjustment (function)................ 51
Wa rning lamp........................................... 52
Seat belt adjus
Seat belt adjustment tment
Ac tivating/deactivating............................ 52
Fu nction.................................................. 51
Seat belt t Seat belt t ensioners ensioners
Ac tivation................................................ 47
Seat belt w
Seat belt w ar
arning
ning
see Seat belt
Seat cov
Seat cov er (Car
er (Care)
e)......................................... 343
Seat heating
Seat heating Activating/deactivating.......................... 111
Seat v
Seat v entilation
entilation
Switching on/o..................................... 111
Selecting a g
Selecting a g ear
ear
see Changing gears
Select
Select or lev
or lever
er
see DIRECT SELECT le ver
Self-t
Self-t est
est
Au tomatic front passenger airbag shut
o............................................................. 57 Sensor
Sensor
s (car
s (care)
e)............................................. 342
Ser
Ser vice
vice
see ASSY STPLUS
Ser
Ser vice cent re
vice centre
see Quali/ed specialist workshop
Ser
Ser vice int
vice int erv
erval displ ay
al displ ay
see AS SYST PLUS
Se
Se tting a speed
tting a speed ............................................ 178
Se
Se tting a speed
tting a speed
see Cruise cont rol
Se
Se tting t
tting t he map scale
he map scale
see Map
ShiT
ShiT paddles
paddles
see Steering wheel gearshiT paddles
ShiTing
ShiTing g
gears
ears
GearshiT recommendation............ .183, 186
Side airbag
Side airbag..................................................... 53
Side im Side im pact prot
pact pr otection
ection ................................. 262
Side windo ws
Side windo ws
Au tomatic function.................................. .93
Child saf ety lock in there ar..................... .80
Closing using theke y............................... 94 Index
519
519

_
Reduced warning lamp po wer....... 479
6 Restraint system warning lam p...... 477
ü Seat belt warning lamp 0ashes...... 478
ü Seat belt warning lamp lights up.... 479
Ú System er rorwa rning lam p........... 479
! The electric parking brake (yel-
low) indica tor lam p................................. 485
ï Trailer tow hitch warning lam p....... 481
h Tyre pressure monitoring sys-
te m wa rning lamp 0ashes....................... 490
h Tyre pressure monitoring sys-
te m wa rning lamp lights up.................... 491
L Warning lamp for distance
wa rning function.................................... 487
Overview................................................ 476
PA SSENGER AIR BA G............................... 57
W
W arr
arr anty
anty........................................................ 42
W
W ashing b
ashing b y hand (car
y hand (car e)
e)................................ 340
W
W at
at er t
er t ank
ank
see Air-water duct W
W
eat
eat her inf
her inf or
ormation
mation ..................................... 305
W
W eb br ow
eb br owsers
sers
Overview................................................ 318
Wheel c
Wheel c hange
hange
Fi tting a new wheel................................ 382
Lo we ring theve hicle.............................. 382
Preparation............................................ 378
Ra ising theve hicle................................. 379
Re moving a wheel................................. .381
Re moving//tting hub caps..................... 378
Wheel c
Wheel c hange hange
see Emer gency spa rewheel
Wheel rot
Wheel rotation
ation............................................. 376
Wheels
Wheels Care..................................................... .342
Checking............................................... 368
Checking the tyre pressure (tyre pres-
sure monitoring system)......................... 371
Fi tting.................................................... 382
Flat tyre................................................. 348
Inter changing......................................... 376
MOExtended tyres................................. 348
Noise..................................................... 368
No tes on /tting...................................... 373 Re
moving............................................... 381
Re placing...................................... .373, 378
Re placing the hub cap............................ 378
Re starting the tyre pressure loss
wa rning system...................................... 373
Re starting the tyre pressure monitor-
ing system............................................. 372
Selection...............................................3 73
Snow chains.......................................... 368
St oring................................................... 377
TIREFIT kit.............................................. 350
Ty re pressure (No tes)............................. 369
Ty re pressure loss warning system
(function)............................................... 372
Ty re pressure monitoring system
(function)............................................... 371
Ty re pressure table................................ .370
Unusual handling characteristics............ 368
W
W i-Fi i-Fi
Setting................................................... 295
W W idescr idescr een coc
een coc kpit ins
kpit instr
trument displ ay
ument display
Instrument cluster.................................... 14
W
W indo
indo w airbag
w airbag ............................................... 53 526
526
Index