2021 MERCEDES-BENZ B-CLASS HATCHBACK Owners Manual

W
W
ar
ar ning/indicat
ning/indicat or lampP
or lam pP ossible causes/conseq
ossible causes/consequences and uences and0050
0050Solutions
Solutions
0077
Ty re pressure monitoring
system warning lamp lights
up *T
he yellow tyre pressure monitoring system warning lamp (pressure loss/malfunction) is lit.
The tyre pressure monitoring system has de tected tyre pressure loss in at least one of the tyres. &
W
WARNING
ARNING Risk of an accident due toinsu1cient tyre pressure
R The tyres can burst.
R The tyres can wearexcessively and/or une venly.
R The driving characteristics as well as the steering and braking may be greatly impaired.
Yo u could then lose control of theve hicle. #
Obser vethere commended tyre pressures. #
Adjust the tyre pressure if necessar y. #
Stop theve hicle in accordance with the tra1c conditions. #
Check the tyre pressure and the tyres. 494
494
Display messages and
warning/indicator lamps

1, 2, 3 ...
1, 2, 3 ...
4MA
4MA TIC
TIC
Fu nction................................................ 191
12 V batt 12 V batt ery ery
see On-board electrical system bat tery (12 V)
12 V soc ket
12 V soc ket
see Soc ket (12 V)
360° Camera
360° Camera
Care...................................................... 348
Fu nction................................................ 260
Opening the camera co ver (r eversing
camera)................................................. 263
Selecting a view.....................................2 63
Switching automatic operation on/o.
(r ev ersing camera)................................. 263 A A
A/C function
A/C function Activating/deactivating (control panel)... 158
Ac tivating/deactivating (MBUX multi-
media system)....................................... 158
ABS (Anti-loc ABS (Anti-loc k Br
k Br aking Syst
aking Syst em)
em).................... 225 A A
cceler
cceler ation
ation
see Kickdown
A
A ccident and Br
ccident and Br eakdo
eakdown Manag
wn Manag ement
ement
Mercedes me connect........................... 319
A
A cous
coustic loc tic loc king
kingv
ver
er i/cation
i/cation signal
signal
Ac tivating/deactivating............................ 82
A
A cous
coustic pr tic pr esence indicat
esence indicat or (sound g
or (sound gener-
ener-
at
at or)
or)
No tes..................................................... 166
A
A cous
coustic V tic Vehicle Indication
ehicle Indication
Sound generator.................................... 166
A
A ctiv
ctiv e Blind Spo
e Blind Spo t Assist
t Assist
Brake application................................... 254
Fu nction................................................ 252
System limi tations.................................. 252
Tr ailer operatio n.................................... .254
A
A ctiv ctiv e bonne
e bonne t (pedes
t (pedestr trian pr ot
ian pr otection)
ection)
Operation.............................................. 337
Re setting............................................... 337
A A ctiv
ctiv e Br
e Br ak
ake Assist
e Assist
Fu nction/no tes...................................... 244
Setting................................................... 248 A
A
ctiv
ctiv e Dist
e Dist ance Assis
ance Assis t DIS
t DISTR
TRONIC
ONIC
Ac tive Emer gency Stop Assist................ 243
Calling up a speed................................. 237
Fu nction................................................ 235
Inc reasing/decreasing speed................. 237
Maximum design speed.......................... 182
Ro ute-based speed adap tation............... 240
Selecting............................................... 237
St oring a speed...................................... 237
Switching o./deactivating.................... .237
Switching on/activating......................... 237
System limitations.................................. 235
A A ctiv
ctiv e Emerg
e Emerg encySt
ency Stop Assist
op Assist ...................... 243
A
A ctiv
ctiv e headlam
e headlam ps
ps........................................ .141
A
A ctiv
ctiv e Lane K
e Lane K eeping Assist
eeping Assist
Ac tivating/deactivating.......................... 257
Ac tivating/deactivating thewa rning....... 257
Fu nction................................................ 255
Setting the sensitivity.............................2 57
System limits......................................... 255
Tr ailer operatio n.................................... .255
A
A ctiv
ctiv e P
e P ar
arking Assist
king Assist
Exiting a parking space. ......................... 271
Fu nction................................................ 268 Ind
ex
495
495

Pa
rking.................................................. 269
System limitations..................................2 68
A
A ctiv
ctiv e Ser
e Ser vice Sy
vice Sy st
stem PL
em PL US
US
see ASS YST PLUS
A
A ctiv
ctiv e Speed Limit Assist
e Speed Limit Assist
Display................................................... 239
Fu nction................................................ 239
A
A ctiv
ctiv eSt
e St eer
eer ing Assist
ing Assist
Ac tivating/deactivating.......................... 243
Ac tive Emer gency Stop Assist................ 243
Fu nction................................................ 241
System limits......................................... 241
A
A dap
dap tiv
tive br
e br ak
ake lights
e lights .................................... 229
A
A dap
dap tiv
tive cr
e cr uise contr
uise contr ol
ol
see Active Distance Assist DISTRONIC
A
A dap
dap tiv
tive Highbeam Assist
e Highbeam Assist
Ac tivating/deactivating.......................... 144
Fu nction................................................ 143
A
A dap
dap tiv
tive Highbeam Assis
e Highbeam Assist Plus t Plus
Fu nction................................................ 144
Switching on/o..................................... 145
A
A dBlue
dBlue ®
®
Ad ditives................................................ 400 Capacity................................................ 401
No tes..................................................... 195
Purit y.................................................... .400
To pping up............................................ .196
A
A dditional door lock
dditional door lock ....................................... 84
A A dditiv dditiv es
es
Ad Blue ®
................................................ .400
Engine oil............................................... 401
Fu el....................................................... 398
A
A dditiv
dditiv es (A
es (AdBlue
dBlue ®
®
)
)
see AdBlue ®
A A dditiv dditiv es (engine oil)
es (engine oil)
see Additives
A
A dditiv
dditiv es (fuel)
es (fuel)
see Fuel
A
A djus
djus ting t
ting t he headlam
he headlam p r
p range
ange ...................... 139
ATer
ATer -sales
-sales ser
service
vice
see ASS YST PLUS
Air conditioning menu
Air conditioning menu Calling up.............................................. 158
Air dis
Air distr tribution
ibution
Setting................................................... 157
Setting (MBUX multimedia system)......... 159 Air inlet
Air inlet
see Air-water duct
Air pr
Air pr essure
essure
see Tyre pressure
Air v
Air v ents
ents
Ad justing (front)..................................... 164
Ad justing (rear)...................................... 165
Air v
Air v ents
ents
see Air vents
Air
Air -conditioning syst
-conditioning syst em
em
see Climate cont rol
Air
Air -r
-recir
ecir culation mode (wit
culation mode (wit h
h/ne
/ne
par
par ticle
ticle pr
pre/lt
e/lt er)
er).......................................... 159
Air
Air -w
-wat
ater duct
er duct
Ke eping free.......................................... 343
Airbag
Airbag
Activation................................................ 47
Fr ont airbag (driver, front passenger)........ 52
Installation locations................................ 52
Knee airbag............................................. 52
Overview.................................................. 52
PA SSENGER AIR BAG indicator la mps...... 57
Pro tection................................................ 53
Re duced pr otection.................................. 54 496 496
Index

Side airbag.............................................. 52
Wi ndow airbag......................................... 52
Air0 ow
Air0ow
Setting................................................... 157
Alar
Alar m syst
m syst em
em
see ATA (anti-theT alarm system)
All-wheel dr
All-wheel dr ive
ive
see 4M ATIC
Ambient lighting
Ambient lighting Setting (MBUX multimedia system)........ .146
Andr
Andr oid A
oid A uto
uto
see Smartphone integ ration
Animals
Animals Pets in theve hicle.................................... 80
Anti-loc
Anti-loc k br
k braking syst
aking syst em
em
see ABS (Anti-lock Braking System)
Anti-skid c
Anti-skid c hains
hains
see Sn owchains
Anti-t
Anti-theT heTprot
pr otection
ection
Ad ditional door loc k................................. 84
Immobiliser............................................ 102
Anti-t
Anti-theT heTprot
pr otection
ection
see ATA (anti-theT alarm system) Anticipat
Anticipat
or
ory occupant pr ot
y occupant pr otection
ection
see PRE-SAFE ®
(anticipatory occu-
pant pr otection)
see PRE-SAFE ®
PLUS (anticipatory
occupant pr otection plus)
Apple CarPlay
Apple CarPlay ®
®
see Smartphone integ ration
Assist
Assist ance syst
ance syst ems
ems
see Driving saf ety sy stem
ASS YS
ASS YST PL
T PL US
US
Battery disconnection period s................ 337
Displaying the service due dat e.............. 336
Fu nction/no tes...................................... 336
Re gular maintenance work..................... 336
Special service requ irements................. 336
AT
ATA A(anti-t
(anti-theT heTalar
alarm syst
m syst em)
em)
Deactivating the alarm........................... 103
Fu nction................................................ 102
Interior pr otection function.....................1 04
Priming/deactivating interior pr otec-
tion........................................................ 104
Priming/deactivating tow- awa y pro-
te ction................................................... 104
To w- awa y protection function................. 103 A
A TTENTION ASSIST
TTENTION ASSIST
Function................................................ 230
Setting.................................................. .232
System limitations.................................. 230
A
A tt
tt ention assist
ention assist ant
ant
see ATTENTION ASSIST
A A ut ut hor
hor ised w
ised w ork
orkshop
shop
see Quali/ed specialist workshop
A
A ut
ut omatic car w
omatic car w ash mode
ash mode
Ac tivating............................................... 345
A
A ut
ut omatic co-dr
omatic co-dr iv
iver airbag
er airbag shut
shuto.
o.
Fu nction of co-driver airbag shuto........... 55
A
A ut
ut omatic dist
omatic dist ance contr
ance control
ol
see Active Distance Assist DISTRONIC
A
A ut
ut omatic dr
omatic dr iving lights
iving lights ................................ 139
A
A ut
ut omatic engine st
omatic engine st art
art
see ECO start/stop function
A
A ut
ut omatic engine st
omatic engine st op
op
see ECO start/stop function
A
A ut
ut omatic fr
omatic fr ont passeng
ont passeng er airbag
er airbagshut
shut o.
o.
PA SSENGER AIR BAG indicator la mps...... 57
A
A ut
ut omatic measur
omatic measur es
esaTer
aTer an accident
an accident........... .60 Index
497
497

A
A
ut
ut omatic mirr
omatic mirr or f
or folding function
olding function
Ac tivating/deactivating.......................... 156
A
A ut
ut omatic tr
omatic tr ansmission
ansmission
DIRECT SELECT le ver............................. 187
Drive prog rams...................................... 182
DY NAMIC SELECT switch....................... 182
Engaging drive position.......................... 189
Engaging reve rsege ar............................ 188
Kickdown............................................... 190
Manual gear changing........................... .189
Selecting park position........................... 188
St eering wheel gearshiT paddles............ 189
Tr ansmission position displ ay................. 187
Tr ansmission position s........................... 187
A
A ut ut omatic tr
omatic tr ansmission (pr
ansmission (problem) oblem)
see Transmission (problem)
Axle load
Axle load Perm issible............................................ 394
Tr ailer operatio n..................................... 410 B
B
Bag hook Bag hook..................................................... 129
Ball neck
Ball neck
Folding out/in........................................ 274 B B
AS (Br
AS (Br ak
ake Assis
e Assist Syst t System)
em)........................... 225
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................................................. 83
Batt
Batt er
ery (v
y (v ehicle)
ehicle)
Charging (Remo teOnline)..................... .171
No tes..................................................... 361
No tes (starting assis tance and charg-
ing)........................................................ 362
Batt
Batt er
ery oper
y oper ation
ation......................................... 166
Belt
Belt see Seat belt
Bicy
Bicy cle r
cle r ack
ack
Load capacit y........................................ 410
Tr ailer operatio n.................................... .277
Blind Spo
Blind Spo t Assist
t Assist
Ac tivating/deactivating.......................... 255
Fu nction................................................ 252
System limi tations.................................. 252 Blow
Blow
er
er
see Clima tecont rol
BlueTEC
BlueTEC see AdBlue ®
Bonnet
Bonnet Function (active bonnet)......................... 337
Opening/closing.................................... 338
Re setting (active bonn et)........................ 337
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..................................................... 403
Br
Br ak
ak e f
e f or
orce disce distr tribution
ibution
EBD (Elect ronic Brake forc e Distribu-
tion)....................................................... 227
Br
Br ak
ak es
es
ABS (Anti-lock Braking System).............. 225
Ac tive Brake Assist................................. 244
Ad aptive brake lights.............................. 229
BAS (Brake Assist System).................... .225
Driving tips............................................1 73498 498
Index

EBD (Electronic Brake
forc e Distribu-
tion).......................................................2 27
HOLD function....................................... 228
Limited braking e.ect (salt-treated
ro ads)................................................... .173
Ne w/replaced brake linings/brake
discs...................................................... 172
Po st-collision brak e.................................. 60
Ru nning-in no tes.................................... 172
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........................................... 370
To wing away.......................................... 367
Tr anspo rting theve hicle........................ .368
Wheel chang e........................................ 383
Br
Br ea kdo
eakdo wn
wn
see Flat tyre
Butt
Butt ons
ons
St eering wheel....................................... 282 C
C
Calls
Calls Mercedes me......................................... 314
Camera
Camera
Information............................................ 223
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)............................................ 343
Car
Car -t
-to-X
o-X -Communication
-Communication
Displaying hazard warnings.................... 308
Care
Care 360° camera......................................... 348
Air-water duct........................................ 343
Automatic car wash.............................. .343
Carpet................................................... 349
Decorative foil........................................ 347
Display................................................... 349 Exterior lighting...................................... 348
Head-up display..................................... 349
High-pressure cleaner............................3
45
Pa int...................................................... 346
Plastic trim............................................3 49
Re alwo od/trim elements..................... .349
Re versing camera..................................3 48
Ro of lining............................................. 349
Seat belt................................................ 349
Seat co ver............................................. 349
Sensors.................................................3 48
St eering wheel....................................... 349
Ta ilpipes................................................ 348
Tr ailer hitc h............................................ 348
Ve hicle soc ketfo rth e high-voltage
battery................................................... 348
Wa shing byhand.................................... 346
Wheels/rims.......................................... 348
Wi ndo ws................................................ 348
Wi per blades.......................................... 348
Car
Car pe pet (Car
t (Car e)
e)............................................... 349
Changing bulbs Changing bulbs Dipped beam......................................... 149
Fitting/removing co ver (front wheel
ar ch )...................................................... 148 Index
499 499

Main beam............................................. 149
No tes..................................................... 147
Overview................................................ 148
Re versing lights......................................1 49
Tu rn signal lights (rear)........................... 149
Changing g
Changing g ears
ears
Manually................................................ 189
Changing hub caps Changing hub caps ....................................... 384
Char Char ging
ging
Char geleve l displa y............................... 214
Charg ing cable control panel.................. 203
Ending thech arging process (alternat-
ing cur rent, mode 2/3).......................... 209
Ending thech arging process (direct
cur rent, mode 4).................................... 213
Indica tor lamps on vehicle soc ket........... 205
No tes - charging station (mode 3)......... .201
No tes - fast charging station (mode 4)... .202
No tes - mains soc ket (Mode 2)............... 200
No tes - wallbox (mode 3)........................ 201
No tes on charging the high-voltage
battery................................................... 198
On-board electrical system battery
(12 V).................................................... 363 Setting
the maximum possible charg-
ing cur rent (mains soc ket)...................... 203
St arting thech arging process (alter-
nating cur rent, mode 2/3)..................... 206
St arting thech arging process (direct
cur rent, mode 4).................................... 211
St ow ing thech arging cable.................... 198
USB port............................................... .134
Char
Char ging cable ging cable
Control panel......................................... 203
St ow ing................................................. 198
Child safe Child safe ty lock
ty lock
Re ar door................................................ .78
Re ar side wind ows................................... 80
Child seat
Child seat
Appr oval catego ries.................................66
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................................................... 69
Seats suitable for ISOFIX child
re straint systems..................................... 68
Securing on the co-driver seat..................77
Securing on there ar seat......................... 74
To pTe ther................................................ 72
Childr
Childr en en
Av oiding dangers in theve hicle............... .62
Basic instructions.................................... 61
Chock
Chock Storage location..................................... 383
Chock
Chock see Chock
City lighting
City lighting.................................................. 142
Cleaning
Cleaning
see Care
Cleaning
Cleaning 0uid
0uid
see windscreen washer 0uid
Climat
Climat e contr
e contr ol
ol
Ac tivating/deactivating.......................... 158 500
500
Index

Ac
tivating/deactivating the A/C func-
tion (control panel).................................1 58
Ac tivating/deactivating the A/C func-
tion (MBUX multimedia system).............. 158
Ac tivating/deactivating the synchro-
nisation function (control panel).............1 59
Ac tivating/deactivating the synchro-
nisation function (MBUX multimedia
system).................................................. 159
Air-recirculation mode (with /ne parti-
cle pre/lter)...........................................1 59
Au tomatic control................................. .158
Calling up the air conditioning menu....... 158
Demisting the windscreen...................... 157
Demisting windo ws................................ 159
Fr ont air vents........................................ 164
Immediate pre-entry clima tecont rol....... 162
No te...................................................... 157
Pre-entry climate control at depa rture
time.......................................................1 61
Pre-entry climate control using theke y... 160
Re ar air vents......................................... 165
Re sidual heat......................................... 159
Setting (MBUX multimedia system)......... 158
Setting the air distribution...................... 157
Setting the air0ow.................................. 157 Setting
theve hicle interior temp era-
ture....................................................... 157
St ationary heater/ ventilation................. 163
Switching there ar wind owheater
on/o.................................................... 157
THERM ATIC cont rol panel...................... 157
THERMOTRONIC control panel............... 157
Ve ntilating theve hicle (con venience
opening).................................................. 96
Clot
Clot hes hook hes hook ................................................ 129
Co-dr
Co-dr iv
iver airbag
er airbag shut
shuto.
o.
see Automatic co-driver airbag shuto.
Coc
Coc kpit
kpit
Overview.............................................. 6, 10
Co.ee
Co.ee cup symbol
cup symbol
see ATTENTION ASSIST
Collision det
Collision det ection (park
ection (parked v
ed vehicle)
ehicle)
Information............................................ 221
Combination switch
Combination switch .................................... .140
Com
Com ponent-speci/c
ponent-speci/c inf
infor
ormation
mation................... 394
Com
Com put
puter
er
see On-board computer
Conv
Conv enience closing
enience closing...................................... 97 Conv
Conv
enience opening
enience opening..................................... 96
Coolant (engine)
Coolant (engine) Levelch eck............................................ 342
No tes..................................................... 404
Cooling
Cooling see Climate control
Cop
Cop yr
yright
ight....................................................... 45
Cor
Cor ner
nering light
ing light............................................. 142
Cr
Cr oss
oss tr
tra1c
a1c (w
(war
arning)
ning)
see Manoeuvring assis tance
Cr
Cr oss
oss Tr
Tra1c
a1c Alert
Alert........................................ 273
Cr
Cr osswind Assist
osswind Assist
Fu nction/no tes...................................... 226
Cr
Cr uise contr
uise contr ol
ol
Ac tivating............................................... 233
Buttons.................................................. 233
Calling up a speed................................. 233
Deactivating........................................... 233
Fu nction................................................ 232
Maximum design speed.......................... 182
Re quirements:....................................... 233
Selecting............................................... 233
Setting a speed...................................... 233 Index
501 501