tow bar MERCEDES-BENZ B-CLASS HATCHBACK 2021 Owners Manual

Calling up t
Calling up t
he Digit
he Digital Owner's Manual
al Owner's Manual
Multimedia system: 4 © 5
Info 5
Owner's Manual 5
Õ The Digital Owner's Manual describes
the func-
tions and operation of theve hicle and the multi-
media system. #
Select one of thefo llowing menu items in the
Digital Owner's Manual:
R Search: sear chforke ywords in order to/nd
qu ick answers toquestions about the opera-
tion of theve hicle.
R Quick start: here is where you /nd the /rst
steps towa rds setting up your vehicle. R
Tips: /nd information that prepares youfor
cer tain eve ryday situations with your vehicle.
R Animations :wa tch animations of theve hicle
functions.
R Messages: receive additional information
about the messages in the Instrument Displa y.
R Bookmarks :ga in access toyour personally
sa ved bookmar ks.
R Language: select the language forth e Digital
Owner's Manual. 1
Back
2 Adds bookmar ks
3 Pictu re 4
Contents section
5 Directions of mo vement of contents section
6 Menu
Some sections in the Digital Owner's Manual,
such as warning no tes, can be expanded and col-
lapsed.
A A dditional met
dditional met hods of calling up t
hods of calling up t he Digit
he Digital Own-
al Own-
er's Manual:
er's Manual:
Dir Dir ect access:
ect access: openthere qu ired content in the
Digital Owner's Manual bypressing and holding
an entry on theta b bar in the multimedia system: Ins
Instr
trument Display
ument Display :
:call up brief information as
display messages in the inst rument clus ter 22
22
Digital Owner's Manual

2
Horizontal distance between centre of grav ity
and ball head
3 The centre of grav ity is on theve hicle's cent re
axis
Obser vethefo llowing information when you are
loading the bicycle rack with up tothre e bicycles:
Loading t
Loading t he bicy
he bicycle r
cle rack
ack T
T
o
o t
tal w
al w eight
eight
of bicy
of bicy cle
cle
r
r ac
ac k and load
k and load Max. dist
Max. dist
ance
ance
1
1 Max. dist
Max. dist
ance
ance
2
2
Up to75 kg 420 mm 300 mm V
V
ehicle to
ehicle towing ins
wing ins tr
tructions
uctions
The vehicle is not suitable forth e use of tow bar
systems that are used for 0at towing or dinghy
to wing, forex ample. Attach ing and using tow bar
systems can result in damage totheve hicle.
When you are towing a vehicle with tow bar sys-
te ms, safe driving characteristics cann otbe guar-
anteed forth eto wing vehicle or theto we dve hicle.
The vehicle-trailer combination may swer vefrom
side toside. Obser
vethefo llowing information:
R Perm itted towing me thods (/ page 365)
R Plug-in h
Plug-in h ybr
ybrid:
id:permitted towing me thods
(/ page 366)
R The no tes on towing theve hicle with bo th
axles on thegr ound (/ page 367) Driving and parking
279
279

+
ENVIR
ENVIR
ONMENT
ONMENT AL NO
AL NOTE
TE Environmen tal
pollution caused byenvironmentally ir re-
sponsible disposal Ty
re sealant contains pollu tants. #
Have the tyre sealant bottle disposed of
professionall y,e.g. at a Mercedes-Benz
Service Centre. #
Stow the tyre sealant bottle, the tyre in0ation
compressor and thewa rning triangle. #
Pull awa
Pull away immediat
y immediat ely.
el y. #
Stop driving aTer appr oximately ten minutes
and check the tyre pressure using the tyre
in0ation compressor.
The tyre pressure must now be at least
130 kPa (1.3 bar/19 psi). &
W WARNING
ARNING Risk of accident due tothe
speci/ed tyre pressure not being attained
If th e speci/ed tyre pressure is not reached,
th e tyre is too badly damaged. The tyre seal-
ant cannot repair the tyre in this instance. The braking and driving
characteristics may be
gr eatly impaired. #
Do not continue driving. #
Consult a quali/ed specialist workshop. Countr
Countr
ies t
ies that hav
hat hav e Mer
e Mercedes-Benz Ser
cedes-Benz Ser vice24h:
vice24h:
yo u will /nd a stic ker with thete lephone number,
e.g. on the B‑pillar on the driver's side. #
Correct the tyre pressure if it is still at least
130 kPa (1.3 bar/19 psi). See the tyre pres-
sure table on the fuel /ller 0ap forva lues.
Incr
Incr easing t
easing t he tyr
he tyre pr
e pressure
essure #
Switch on the tyre in0ation compressor.
Decr
Decr easing t
easing t he tyr
he tyre pr
e pressure
essure #
Remo vethe tyre sealant bottle from the tyre
in0ation compressor. #
Insert the /ller hose in the soc ket of the tyre
in0ation compressor and turn it a quarter turn
clockwise. #
Press pressure release button Cnext to
manome terB.
When t When t he tyr he tyre pr
e pressur
essur e is corr
e is corr ect
ect #
Unscr ewthe /lling hose from theva lve of the
sealed tyre. #
Screw theva lve cap onto theva lve of the
sealed tyre. #
Stow the tyre sealant bottle and the tyre in0a-
tion compressor. #
Drive tothe nearest quali/ed specialist work-
shop and ha vethe tyre, tyre sealant bottle and
/lling hose replaced there. 360
360
Breakdown assistance

Mercedes-Benz
recommends that you ha vethe
12 V battery replaced at a quali/ed specialist
wo rkshop, e.g. at a Mercedes-Benz Se rvice
Centre.
Obser vethefo llowing no tes if youwa nttoreplace
th e battery yourself:
R Alwaysre place a faulty battery with a battery
which meets the speci/c vehicle requ ire-
ments.
The vehicle is equipped with a 0eece batter y.
Fu llve hicle functionality is only guaranteed
with a 0eece batter y.Fo r saf etyre asons,
Mercedes-Benz recommends that you only
use batteries which ha vebeen tested and
appro vedfo ryo ur vehicle byMercedes-Benz.
R Use de tach able parts such as vent hoses,
elbow /ttings or term inal co vers from the bat-
te ry which is tobe replaced.
R Make sure that theve nt hose is alw ays con-
nected tothe original opening on the side of
th e batter y.
Fi t any existing or supplied cell caps.
Otherwise, gases or battery acid could
escape. R
Make sure that de tach able parts are recon-
nected in the same way. T T
o
o w
w -st
-st ar
arting or to
ting or towing away
wing away P
P
er
er mitt
mitt edto
ed towing met
wing met hods (non plug-in h
hods (non plug-in h ybr
ybrid)
id) P
P
er
er mitt
mitt edto
ed towing met
wing met hods
hods
Mercedes-Benz recommends transporting your
ve hicle in the case of a breakdown, rather than
to wing it away.
Fo rto wing, use a tow rope or tow bar with bo th
axles on thegr ound. Do not use tow bar systems. &
W
WARNING
ARNING Risk of accident when towing
with steering wheel lock
If th e steering wheel lock is engaged, you will
not be able tosteer theve hicle. #
When towing with a tow rope or tow bar,
alw ays switch on theve hicle. *
N
NOOTE
TE Damage totheve hicle due to tow-
ing awa y incor rectly #
Obser vethe inst ructions and no tes on
to wing away. V
V
ehicles wit
ehicles wit h manual tr
h manual tr ansmission
ansmission
Bo th axles on
th egr ound Ye
s, maximum 50 km at
50 km/h
Fr ont axle
ra ised Ye
s, maximum 50 km at
50 km/h
Re ar axle
ra ised Ye
s, maximum 50 km at
50 km/h V
V
ehicles wit
ehicles wit h aut
h automatic tr
omatic tr ansmission
ansmission
Bo th axles on
th egr ound Ye
s, maximum 50 km at
50 km/h
Fr ont axle
ra ised Ye
s, maximum 50 km at
50 km/h
Re ar axle
ra ised Ye
s, maximum 50 km at
50 km/h Breakdown assis
tance
365
365

4MA
4MA
TIC v
TIC v ehicles
ehicles
Bo th axles on
th egr ound Ye
s, maximum 50 km at
50 km/h
Fr ont axle
ra ised No
Re ar axle
ra ised No T
T
o
o wing wit
wing wit h a r
h a raised axle:
aised axle: towing should be per-
fo rm ed byato wing compan y. Ov
Ov
er
ervie
vie w of per
w of per mitt
mittedto
ed towing met
wing met hods (plug-in
hods (plug-in
h
h ybr
ybr id)
id) Mercedes-Benz
recommends transporting your
ve hicle in the case of a breakdown, rather than
to wing it away. Fo
rto wing, use a tow rope or tow bar with bo th
axles on thegr ound. Do not use tow bar systems.
* N
NOOTE
TE Damage totheve hicle due to tow-
ing awa y incor rectly #
Obser vethe inst ructions and no tes on
to wing away. Obser
vethe information on towing and transport-
ing theve hicle in theve hicle Owner's Manual.
P
P er
er mitt
mitt edto
ed towing met
wing met hods
hods V
V
ehicle eq
ehicle eq uipment/to
uipment/to wing met
wing method
hod Bot
Bot
h axles on t
h axles on t hegr
he ground
ound F
F
r
ront axle r
ont axle r aised
aised R
R
ear axle r
ear axle r aised
aised
Plug-in hybrid vehicles Yes, maximum 50 km at 50 km/h Yes, maximum 50 km at 50 km/h Yes, maximum 50 km at 50 km/h
The steering wheel must be /xed in
th e centre position with a steering
wheel loc k. 366 366
Breakdown assistance

#
Information on the permissible gross mass of
th eve hicle can be found on theve hicle identi-
/cation plate (/ page 394).#
V
Vehicles wit
ehicles wit h aut
h automatic tr
omatic tr ansmission:
ansmission: do not
open the driver's door or front passenger
door; the transmission otherwise automati-
cally shiTs toposition 005D. #
Fitth eto wing eye (/ page 370). #
Fasten theto wing device.
* N
NOOTE
TE Damage due toincor rect connec-
tion of theto w bar #
Only connect theto w rope or tow bar to
th eto wing eyes. #
Deactivate the automatic locking mechanism
(/ page 87). #
Do not activate the HOLD function. #
Deactivate tow- awa y protection
(/ page 104). #
Deactivate Active Brake Assist (/ page 248).#
V
Vehicles wit
ehicles wit h aut
h automatic tr
omatic tr ansmission:
ansmission: shiTto
position 005C. #
V
Vehicles wit
ehicles wit h manual tr
h manual tr ansmission:
ansmission: shiTto
neutral 005C. #
Release the electric parking brake. &
W
WARNING
ARNING Risk of accident due tolimited
saf ety-re lated functions during theto wing
process
Saf ety-re lated functions are limited or no lon-
ge rav ailable in thefo llowing situations:
R theve hicle is switched o..
R the brake system or po wer steering system
is malfunctioning.
R the energy supply or the on-board electri-
cal system is malfunctioning.
When your vehicle is towe daw ay, signi/cantly
more e.ort may be requ ired tosteer and
brake than is normally requ ired. #
Use a tow bar. #
Make sure that the steering wheel can
mo vefreely be fore towing theve hicle
awa y. *
N
NO
O TE
TE Damage due toexcessive tractive
po wer If
yo u pull away sharpl y,the tractive po wer
may be too high and theve hicles could be
damaged. #
Pull away slo wlyand smoo thly. Loading t
Loading t
he v
he v ehicle f
ehicle f or tr
or transport
anspo rt Hybr
Hybr
id v
id vehicles:
ehicles: transpor tation of vehicles should
only be car ried out byprofessional reco very com-
panies. #
Obser vethe no tes on towing away
( / page 367). #
Connect theto wing device totheto wing eye
in order toload theve hicle.
% You can also attach theto w bar tothe trailer
hitch. #
V
Vehicles wit
ehicles wit h aut
h automatic tr
omatic tr ansmission:
ansmission: shiTthe
automatic transmission toposition 005C. 368
368
Breakdown assistance

T
T
o
o wing ey
wing eye st
e st or
orag
ag e location
e location The
towing eye is under the load compartment
0oor. F
F
itting and r
itting and r emo
emo ving t
ving t heto
he towing eye
wing eye #
Press the mark on co ver1 inwa rds and
re mo ve. #
Screw intheto wing eye clockwise as far as it
will go and tighten.
V
V ehicles wit
ehicles wit h a tr
h a trailer hitc
ailer hitc h:
h:vehicles with a trailer
hitch do not ha veare ar brac ketfo rth eto wing
ey e. Fasten theto w bar tothe trailer hitch. #
Make sure that co ver1 engages in the
bumper when youre mo vetheto wing eye.
* N
NOOTE
TE Damage totheve hicle due toincor-
re ct use of theto wing eye or trailer hitch When a
towing eye or trailer hitch is used to
re co ver a vehicle, theve hicle may be damaged
in the process. #
Only use theto wing eye or trailer hitch to
to w awa y or tow start theve hicle. #
Do not use theto wing eye or trailer hitch
to to wtheve hicle during reco very. T
T
o
o w
w -st
-st ar
arting t
ting t he v
he vehicle
ehicle V V
ehicles wit ehicles wit h aut
h automatic tr
omatic tr ansmission
ansmission
* NO
NOTE
TE Damage tothe automatic transmis-
sion due to tow-starting The au
tomatic transmission may be damaged
in the process of tow- starting vehicles with
automatic transmission. #
Vehicles with automatic transmission
must not be tow- star ted. #
Vehicles with an automatic transmission must
not be tow- star ted.
V V ehicles wit ehicles wit h manual tr
h manual tr ansmission
ansmission #
Obser vethe no tes on towing away
( / page 367). #
If necessar y,allow the engine and exhaust
system tocool down. #
Swit chon the ignition. #
Engage second gear. #
Release the electric parking brake. 370
370
Breakdown assistance

#
Tow- start theve hicle while the clutch pedal is
fully depressed. #
Slowly re leasethe clutch pedal. #
Immediately shiT toneutral if the engine
starts. #
Stop theve hicle in accordance with the tra1c
conditions. #
Remo vetheto w bar. #
Remo vetheto wing eye. #
Have theve hicle checked at a quali/ed spe-
cialist workshop. Electr
Electr
ical fuses
ical fuses N
No
ot
tes on electr
es on electr ical fuses
ical fuses &
W
WARNING
ARNING Risk of accident and injury due
to ove rloaded lines
If yo u manipulate or bridge a faulty fuse or if
yo ure place it with a fuse with a higher amper-
age, the electric line could be overloaded.
This could result in a /re. #
Alwaysre place faulty fuses with speci-
/ed new fuses containing the cor rect
amperage. *
N
NOOTE
TE Damage due toincor rect fuses Electrical components or systems may be
damaged
byincor rect fuses, or their function-
ality may be signi/cantly impaired. #
Only use fuses that ha vebeen appr oved
by Mercedes-Benz and which ha vethe
cor rect fuse rating. Blown fuses must be
replaced with fuses of the
same rating, whi chyou can recognise bythe col-
our and the label. The fuse ratings and fur ther
information tobe obser ved can be found in the
fuse assignment dia gram.
F F use assignment diagr
use assignment diagr am:
am:onthe fuse box in the
engine compartment (/ page 372). *
N
NOOTE
TE Damage or malfunctions caused by
moisture Moisture may cause damage
tothe electrical
system or cause it tomalfunction. #
When the fuse box is open, make sure
th at no moisture can enter the fuse box. #
When closing the fuse box, make sure
th at the seal of the lid is positioned cor-
re ctly on the fuse box. If
th e ne wlyinser ted fuse also blo ws, ha vethe
cause traced and recti/ed at a quali/ed specialist
wo rkshop.
Ensure thefo llowing before replacing a fuse:
R The vehicle is secured against rolling away.
R All electrical consume rsare switched o..
R The vehicle is switched o..
The elect rical fuses are located in various fuse
bo xes:
R Fuse box in the engine compartment on the
leT-hand side of theve hicle, when vie wed in
th e direction of tr avel (/ page 372) Breakdown assistance
371
371

St
oring a speed...................................... 233
System limitations.................................. 232 D
D
Dam
Dam ping adjus
ping adjus tment
tment.................................... 257
Dashboard
Dashboard see Cockpit
Dashcam
Dashcam Notes..................................................... 309
Selecting a USB device......................... .310
St arting/stopping a video recording...... .310
Dat
Dat a acq
a acq uisition
uisition
Ve hicle..................................................... 42
Dat
Dat a pr ot
a pr otection r
ection r ights
ights
Data storag e............................................ 45
Dat
Dat a st
a st or
or age
age
Data pr otection rights.............................. 45
Electronic control units............................ 42
Online services........................................ 44
Ve hicle..................................................... 42
Deactiv
Deactiv ating t ating the alar
he alar m (AT
m (ATA)
A)........................ .103
Dealer
Dealer ship
ship
see Quali/ed specialist workshop Declar
Declar
ation of conf
ation of conf or
ormity
mity
Elect romagnetic compatibilit y.................. 29
Impor ter addresses.................................. 36
Jack.........................................................36
Speci/c absor ption rate........................... 29
TIREFIT kit................................................ 37
Wi reless vehicle component s................... 29
Decor Decor ativ
ative f
e foil (cleaning ins
oil (cleaning instr tructions)
uctions)........... 347
DeN
DeNOx ag Ox ag ent
ent
see AdBlue ®
Des
Destination entry tination entry
Entering a POI or addres s....................... 305
Det
Det ecting inatt
ecting inatt entiv
entiveness
eness
see ATTENTION ASSIST
Diagnos
Diagnostics connection tics connection.................................. 38
Diesel
Diesel Low outside tempe ratures...................... 399
No tes..................................................... 399
Digit
Digit al Owner's Manual
al Owner's Manual.................................. 22
Dingh
Dingh yto
y to wing
wing
see Tow- bar system
Dipped beam
Dipped beam Changing bulbs..................................... .149 DIRECT SELECT lev
DIRECT SELECT lev
er
er
Engageing reve rsege ar.......................... 188
Engaging drive position.......................... 189
Engaging neutral................................... .188
Engaging park position automaticall y...... 188
Fu nction................................................ 187
Selecting park position........................... 188
Displa
Displa y (car
y (care)
e)............................................... 349
Displa
Displa y (MBUX multimedia syst
y (MBUX multimedia syst em)
em)
Home sc reen.........................................2 89
Operating.............................................. 290
Displa
Displa y (on-boar
y (on-boar d com
d comput
puter)
er)
Displa yson the inst rument displa y......... 285
Displa
Displa y in t
y in the windscr
he windscr een
een
see Head-up display
Displa
Displa y message
y message
Calling up (on-board computer).............. 412
No tes..................................................... 412
Displa Displa y messag
y messag es
es
ç - - - km/h .................................... .453
00CB - - - km/h..................................... 452
h - - - km/h..................................... 452
006F 2nd seat row, leT Not loc ked......... 437 502
502
Index

Re
duced drive system per form ance
See Owner's Manual.............................. 428
Re versing not poss. Consult workshop ... 443
Risk of vehicle rolling away App ly
parking brake See Owner's Manual ........ 444
Risk of vehicle rolling awayPa rking
brake not applied See Owner's Manual ... 450
Risk of vehicle rolling Driver door
open and transmission not in P .............. 442
Ru n Flat Indica tor inoperative................. 473
Speed limit (winter tyres) XXX km/h .......455
Speed Limit Assist cur rently una vaila-
ble See Owner's Manual........................ 454
Speed Limit Assist inoperative................ 454
Te aching in transmission comple te......... 444
Te aching in transmission Operate
selector le ver Brake for XX seconds
Risk of vehicle rolling ............................. 444
To shiT out of P or N,depress brake
and start engine.................................... .441 To
switch o. the engine, press the
St art/ Stop button for at least 3 sec-
onds or 3 times...................................... 438
Tr a1c Sign Assist cur rently una vaila-
ble See Owner's Manual........................ 456
Tr a1c Sign Assist inoperative................. 456
Tr ansmission Malfunction ....................... 443
Tr ansmission Malfunction Stop............... 443
Tr ansmission Malfunction Visit work-
shop ...................................................... 445
Ty re press. monitor cur rently una vaila-
ble......................................................... 469
Ty re press. monitor inoperative .............. 469
Ty re press. monitor inoperative No
wheel sensors ........................................ 470
Ty re pressure Check tyres ...................... 472
Ty re(s) ove rheated .................................. 472
Ve hicle not cur rently being charged
Charging station fault............................. 427
Wi per malfunctioning .............................437 Wi
thout changing gear, consult work-
shop ............................................. .429, 442
Wi thout starting engine again, consult
wo rkshop ............................................... 429
Dist
Dist ance contr ance contr ol
ol
see Active Distance Assist DISTRONIC
DIS DIS TR
TR ONIC ONIC
see Active Distance Assist DISTRONIC
Door
Door Additional door loc k................................. 84
Child saf ety lock (rear door )..................... 78
Locking/unlocking (emer gency key)........ .88
Opening (from inside).............................. .85
Unlo cking (from inside)............................ 85
Door contr
Door contr ol panel
ol panel......................................... 18
Dra
Dra wbar
wbar
see Tow- bar system
Dr
Dr iv
ive Awa
e Away Assi st
y Assi st........................................ .272
Dr
Dr iv
ive position
e position
Engaging................................................ 189
Dr
Dr iv
ive pr
e pr ogr
ogram display
am display .................................. 183 Index
507
507