service MERCEDES-BENZ B-CLASS HATCHBACK 2021 Owners Manual

Disclaimer
Das folgen de PDF -Doku ment für die ses Fahrze ugmodell be zieht sich in allen
Sprachver sionen nur auf die Fahrz euge, d ie fü r den deutsche n Markt best immt
sind und die den deutschen Vorschriften entsprechen. Bitte wenden Sie sich an
Ihr en autorisierten Mer cedes-Benz Services tützpunkt, um ein gedruckt es Exem plar
für andere Fahrzeugmodelle und Fahrzeugmodelljahre zu erhalten.
Dieses PDF -Dokume nt stellt die aktuelle Version dar . Mögliche Abweic hungen zu
Ihrem konkreten Fahrzeug könnten nicht berücksichtigt sein, da Mercedes-Benz
seine Fahrzeuge st ändig dem neuest en Stand d er Technik anp asst, so wie
Änderungen in Form und Ausstattung vornimmt. Bitte beachten Sie daher, dass
dieses PDF-Dokument in keinem Fall das gedruckte Exemplar ersetzt, das mit
dem Fahrzeug ausgeliefert wurde.
Internal use only
Disclaimer
All language versions of the following PD\f document for this vehicle model
relate solel\b to vehicles intended for sale on the German market and which
correspond to German regulations.
Please contact \bour authorised Mercedes-Benz Service Centre to obtain
a printed version for other vehicle models and vehicle model \bears. This PD\f
document is the latest version. Possible variations to \bour vehicle ma\b not
be taken into account as Mercedes-Benz constantl\b updates their vehicles to
the state of the art and introduces changes in design and e\Dquipment. Please
therefore note that this PD\f document in no wa\b replaces the printed version
which was delivered with \bour vehicle.
Internal use only
Disclaimer
The following version of the Owner‘s Manual describes all models, series and
special equipment of your vehicle. Country-specific language variations are
possible. Please note that your vehicle might not be equipped with all the
described functions. This also affects safety-relevant systems and functions.
Please contact your authorised Mercedes-Benz dealership if you would like
to receive a printed Owner‘s Manual for other vehicle models and vehicle
model years.
The online Owner‘s Manual is the current and valid version. It is possible that
deviations affecting your specific vehicle could not be taken into account
as Mercedes-Benz constantly adapts its vehicles according to the latest
technology and makes changes to the form and the equipment.
Please also read the printed Owner‘s Manual, supplementary documents and
the digital Owner‘s Manual in the vehicle.
Copyright
All rights reserved. All texts, images and graphics are subject to copyright
and other laws for the protection of intellectual property. They may not be
copied or changed for any commercial use or for the purpose of being passed
on nor used on other webistes.

Thank y
Thank y
ou f
ou for buying Mer
or buying Mer cedes-Benz
cedes-Benz
Before you /r stdrive o., read this operator's
manual carefully and familiarise yourself with your
ve hicle. Foryo ur ow n sa fety and a longer operat-
ing lifespan of theve hicle, follow the inst ructions
and warning notices in this operator's manual.
Disregarding them may lead todamage tothe
ve hicle or injury topeople.
The standard equipment and product description
of your vehicle may vary and depends on thefo l-
lowing factors:
R Model
R Order
R National version
R Availability
Yo ur vehicle may therefore di.er, in individual
cases, from that shown in the descriptions and
illust rations.
The illustrations in this operator's manual show a
leT-hand drive vehicle. On right-hand-d rive ve hi-
cles, the la yout of car parts and control elements
di.ers accordingl y. Mercedes-Benz is constantly de
veloping its vehi-
cles fu rther.
Mercedes-Benz therefore reser vesth eright to
introduce changes in thefo llowing areas:
R Design
R Equipment
R Tech nical features
The following documents are integ ral parts of the
ve hicle:
R Digital operator's manual
R Printed operator's manual
R Service booklet
R Equipment-dependent supplements
R Supplementary documents
Ke ep these documents in theve hicle at all times.
Ensu rethat all documents are in theve hicle or
passed on in theeve nt of sale or rental.
2475844710Z102
2475844710Z102

Changing bulbs (only
forve hicles with hal-
ogen headlamps) ......................................... 147
Wi ndsc reen wipers and windscreen
wa sher system ............................................ 149
Mir rors ........................................................ 153 Climat
Climat
e contr
e control ol........................................... 157 157
Overview of climate control systems ............ 157
Operating the climate control system .......... 158 Dr
Dr
iving and par
iving and par king
king..................................... 166 166
Driving ........................................................1 66
DY NAMIC SELECT switch ........................... .182
Manual transmission ................................... 185
Au tomatic transmission .............................. .187
Fu nction of the 4MATIC ...............................1 91
Re fuelling .................................................... 191
Charging the high-voltage battery (plug-in
hy brid) ........................................................ 198
Pa rking .......................................................2 15
Driving and driving saf ety sy stems ............... 223
Tr ailer hitch ................................................ .273
Bicycle rack function ................................... 277
Ve hicle towing instructions .......................... 279 Ins
Ins
tr
trument displa
ument displa y and on-boar
y and on-boar d com-
d com-
put
put er
er........................................................... 280 280
No tes on the inst rument display and on-
board computer .......................................... 280
Overview of instrument display .................... 281
Overview of buttons on the steering wheel ... 282
Operating the on-board computer ................2 82
Fu nction of the po wer me ter (plug-in
hy brid) ........................................................ 284
Fu nction of the electric mo tor po wer
av ailability displ ay(plug-in hybrid) ................ 284
Displaying the po wer me ter (plug-in
hy brid) ........................................................ 285
Overview of displa ysinthe inst rument
display ........................................................ 285
Head-up display .......................................... 285 MBUX multimedia syst MBUX multimedia syst
em
em........................... .288
288
Overview and operation ............................... 288
System settings .......................................... 297
Plug-in hybrid settings ................................ .301
Na vigation .................................................. .302
Te lephone ................................................... 311
Mercedes me app ....................................... 314 Mercedes-Benz emer
gency call system ....... 323
Ra dio & media ............................................ .330
Sound settings ............................................ 335 Maint Maint
enance and car
enance and car e
e................................. 336 336
ASS YST PLUS service inter val display .......... 336
Engine compartment ................................... 337
Cleaning and care ....................................... 343 Br Br
eakdo
eakdo wn assist
wn assist ance
ance................................. 352 352
Emer gency .................................................. 352
Flat tyre ...................................................... 354
Battery (vehicle) .......................................... 361
To w- starting or towing away ........................ 365
Electrical fuses ............................................ 371 Wheels and tyr Wheels and tyr
es
es......................................... 374 374
No tes on noise or unusual handling char-
acteristics ................................................... 374
No tes on regula rly inspecting wheels and
tyres .......................................................... .374
No tes on snow chains ................................. 374
Ty re pressure .............................................. 375 Contents
3 3

Pr
ot
Pr otection of t
ection of t he en
he envir
vironment
onment
+ ENVIR
ENVIR
ONMENT
ONMENT AL NO
AL NOTE
TE Environmental
damage due tooperating conditions and
personal driving st yleThe pollutant emission of
theve hicle is
directly related tothewa yyo u operate the
ve hicle.
Operate your vehicle in an environmentally
re sponsible manner tohelp pr otect the envi-
ro nment. Please obser vethefo llowing recom-
mendations on operating conditions and per-
sonal driving st yle.
Oper
Oper ating conditions:
ating conditions: #
Make sure that the tyre pressure is cor-
re ct. #
Do not car ryany unnecessary weight
(e.g. roof luggage rack s once you no lon-
ge r need them). #
Adhere tothe service inter vals.
A regula rly serviced vehicle will cont rib-
ute toenvironmental pr otection. #
Always ha vemaintenance workcar ried
out at a quali/ed specialist workshop.
P
P er
er sonal dr
sonal dr iving s
iving stytyle:
le: #
Do not depress the accelerator pedal
when starting the engine. #
Do not warm uptheve hicle while sta-
tionar y. #
Drive carefully and maintain a suitable
distance from theve hicle in front. #
Avoid frequent, sudden acceleration and
braking. #
Change gear in good time and use each
ge ar only up to00C3 of its maximum
engine speed. #
Switch o. theve hicle in stationary traf-
fi c, e.g. byusing the ECO start/s top
function. #
Drive in a fuel-e1cient manner. Obse rve
th e ECO display for an economical driv-
ing style. Plug-in h Plug-in h
ybr
ybrid
id
+ ENVIR
ENVIR
ONMENT
ONMENT AL NO
AL NOTE
TEEnvironmental
pollution caused byirre sponsible disposal
of the high-voltage battery A high-voltage battery contains materials
which are harmful
tothe environment. #
Dispose of faulty high-voltage batteries
at a quali/ed specialist workshop. T T
ak
ak e-bac
e-bac k of end-of-lif
k of end-of-lif e v
e vehicles
ehicles
EU countr EU countr ies only:
ies onl y:
Mercedes-Benz will take back your end-of-life
ve hicle for environment-fri endly disposal in
accordance with the European Union (EU) End-of-
Life Vehicles Directi ve.
A network of vehicle take -back points and dis-
mantlers has been established foryo uto return
yo ur vehicle. You can lea veit at any of these
points free of charge . This makes an impor tant
cont ribution toclosing there cycling circle and
conserving resources. 24 24
Gene
ral no tes

This is
the case in thefo llowing situations:
R The vehicle type is di.erent from that for
which theve hicle's general ope rating permit
wa sgr anted.
R Other road users could be endangered.
R The exhaust gas or noise le velget swo rse.
Alw ays specify theve hicle identi/cation number
(VIN) (/ page 394) when ordering Mercedes-
Benz Genuine Parts. Owner's Manual
Owner's Manual
This Owner's Manual and the Digital Owner's
Manual in theve hicle describe thefo llowing mod-
els and the standard and special equipment for
yo ur vehicle:
R The models and the standard and special
equipment available at the time of this Own-
er's Manual going topress.
R The models and the standard and special
equipment only available in cer tain countries. R
The models and the standard and special
equipment, which will only be available at a
later date.
No tethat your vehicle may not be /tted with all
fe atures described. This is also the case for sys-
te ms releva nt tosaf ety. Therefore, the equipment
on your vehicle may di.er from that in the
descriptions and illustrations.
The original pur chase ag reement foryo ur vehicle
contains a list of the equipment in your vehicle at
th e time of deliver y.
Should you ha veany questions concerning equip-
ment and operation, please consult a Mercedes-
Benz Service Centre.
The Owner's Manual, Supplement, fur ther supple-
mentary documents and Service Booklet are
impor tant documents and should be kept inthe
ve hicle. Mer Mer
cedes me App
cedes me App N
No
ot
tes about t
es about t he on-demand f
he on-demand f eature
eature Yo
u can also activate various functions (on-
demand feature) subsequently via Mercedes me
aTer pur chasing your vehicle.
Information is available at any Mercedes-Benz
Se rvice Centre. A
A
ctiv
ctiv ating on-demand f
ating on-demand f eatur
eature using Mer
e using Mer cedes me
cedes me R
R
eq
eq uir
uir ements:
ements:
R The vehicle has GPS reception.
R The vehicle is lin kedto the Mercedes me user
account.
Or
Or der
der ing and activ
ing and activ ating on-demand f
ating on-demand f eature
eature #
Addth e desired on-demand feature forthe
ve hicle tothe shopping bask etinthe
Mercedes me Store. #
Comple tethe order.
The on-demand feature is activated when
operating theve hicle. 26
26
Gene
ral no tes

Speeding up activ
Speeding up activ
ation
ation #
Switch theve hicle o. and lock it. #
ATer about 2 minutes, unlock theve hicle and
switch on theve hicle.
The on-demand feature has been activated.
Fo r some features, a noti/cation also appears
in theve hicle's multimedia system.
If th e activation was not successful, repeat the
process. Oper
Oper
ating safe
ating safe ty
ty &
W
WARNING
ARNING Risk of inju rydue tomalfunc-
tions or system failure
In order toavo id malfunctions or system fail-
ures: #
Always ha vethe speci/ed service/main-
te nance workas well as any necessary
re pairs car ried out at a quali/ed special-
ist workshop. &
W
WARNING
ARNING Risk of accident or injury due
to improper modi/cations toelectronic
components
Modi/cations toelectronic components, their
soTware or wiring can impair their functional-
ity and/or the functionality of other networ ked
components or saf ety-re leva nt systems.
This can endanger theve hicle's operating
saf ety. #
You must not tamp er with wiring, elec-
tronic components, or their soTware. #
Always ha veworkon electrical and elec-
tronic devices car ried out at a quali/ed
specialist workshop. If
yo u modify the on-board electronics, thege n-
eral ope rating permit is rendered in valid.
Obser vethe "On-board electronics" section in
"Technical data". &
W
WARNING
ARNING Risk of /re due to0ammable
materials on hot parts of theex haust sys-
tem
Flammable material such as lea ves, grass or
twigs may ignite if they come into contact with
hot parts of theex haust system. #
When driving on unpa vedro ads or o.-
ro ad, regula rly ch eck theve hicle under-
side. #
Remo vetrapped plants or other 0amma-
ble material, in particular. #
Ifth ere is damage, consult a quali/ed
specialist workshop immediatel y. General no
tes
27
27

Yo
u can obtain fur ther information from a
Mercedes-Benz service centre.
F F or t
or t he U
he Unit nited Kingdom onl y:
ed Kingdom onl y:The
following information applies toall wireless
components of theve hicle and of the information systems and communication devices integ
rated in
th eve hicle:
The manu facturers of the wireless components
installed in theve hicle hereby declare that all
wireless components ins talled in theve hicle com-
ply with theRa dio Regulations 2017 directi ve. The
full texts of the declarations of conformity are
av ailable at thefo llowing web address:
https://moba.i.daimler.com/mar kets/ece-r ow/
baix/cars/certi/cates-of-con form ity/en_GB/
index.html F
F
or Br
or Br azil onl y:
azil onl y: No
teon two-w ayradio systems in theve hicle: 30
30
Gene
ral no tes

These systems are not pr
otected against harmful
inter fere nce and must not cause inter fere nce in
prope rly appr oved systems.
F
F or Jamaica onl y:
or Jamaica onl y:
All wireless vehicle components ha vereceived
type appr oval from the SMA.
F
F or Nig
or Nig er
eria onl y:
ia onl y: Connection and use of
thera dio communications
equipment in this vehicle is permitted bythe
Nigerian Communications Commission F
F
or R
or R ussia onl y:
ussia onl y: The manufacturers of
the wireless components
installed in theve hicle hereby declare that all
wireless components ins talled in theve hicle com-
ply with thete ch nical regulations for two-w ay
ra dios. You can obtain fur ther information from a
Mercedes-Benz service centre. F
F or Ukr
or Ukr aine onl y:
aine onl y: The manufacturers of
the wireless components
installed in theve hicle hereby declare that the
wireless components ins talled in theve hicle com-
ply with thete ch nical regulations for two-w ay
ra dios. You can obtain fur ther information from a
Mercedes-Benz service centre.
W
W ir ireless applications in t
eless applications in t he v
he vehicle
ehicle
Besides the typical frequencies for mobile com-
munication cars byMercedes-Benz ma keuse of
th efo llowing automotive radio applications. General no
tes
31
31

T
T
ec
ec hnology Fr
hnology Freq
eq uency r
uency r angeT r
ang eT ransmission output/magne
ansmission output/magne tic
tic/eld
/eld s
strtr eng th
ength
UMTS (Band I, III, VIII)+ 24 dBm (+1/-3 dB)
LT E (Band 1, 3, 7, 8, 20, 28) +23 dBm (±2 dB)
RAMSES (Router And Mobile SErviceS )GSM (E-GSM 850 / E-GSM 900, Class 4)
GSM (E-GSM 1800 / E-GSM 1900, Class 4) < +32.5 dBm (±1 dB)
< +29.5 dBm (±1 dB)
UMTS (WCDMA FDD I, II, III, IV, V,VIII, XIX, Class
3) < +23.5 dBm (±1 dB)
LT E (FDD B1, B2, B3, B4, B5, B7, B8, B9, B18,
B19, B21, B28, Class 3) < +23 dBm (±1 dB)
LT E (TDD B38, B40, B41, Class 3) < +23 dBm (±1 dB)
GNSS (1559–1610 MHz )R eceiving onlyInf Inf
or
ormation about t
mation about t he
hespeci/c
speci/c absorp
absorption r
tion rate
ate
Fo rFr ance onl y: The
values weredeterm ined and tested in acco rd-
ance with the Décr etn° 2019-1186 guideline re
ga rding the indication of the speci/c absor ption
ra te (SAR) of wireless vehicle components. 34 34
Gene
ral no tes

5N0 012
615C
5N0 012
615F
9P1 012
615A
9P1 012
615B
1EA 012
615
8P0 012
615A
8P0 012
615E
7P0 012
617A4L0 012
615
760 012
615
A000583
5001
6898012
3220901
2
8888002
695 meet all
the essential requ irements forth efo llo w-
ing guidelines: (4)
2006/42/EC (EC Machinery Directive)
2014/30/EU (EC EMC Directive)
2000/14/EC (EC Outdoor Noise Directive)
Pe rson authorised tocompile thete ch nical docu-
ments referred toin Annex VII A of Directive
2006/42/EC:
Aircom Automotive Sp. z o.o. Sp. k.
Dominik Gschwender (5)
ul. Fabryc zna 20B
55-080 Pietrzyk owice
Po land Applied harmonised standards: (6)
DIN EN 12100:2012 / DIN EN ISO 3744:1995
DIN EN 60204-1:2006 / DIN EN ISO 2151:2009
DIN EN 60335-1:2012 / DIN EN ISO 4871:2009
DIN EN 1012-1:2011 / DIN EN ISO13732-1:2008
DIN EN 55012:2010 / DIN EN 61000-6-3:2011
DIN EN 61000-6-1:2016
Other
tech nical standa rds and speci/cations
applied:
none (7)
Pietrzyk owice, 23.04.2019
[Signature, D. Gschwender]
Dominik Gschwender, general management
No te:th is declaration loses its validity if tech nical
or ope rational changes are made without the con-
sent of the manufacturer. Diagnos Diagnostics connection
tics connection
The diagnostics connection is a tech nical inter-
fa ce in theve hicle. It is used, forex ample, in the
cont ext of repair and maintenance workor for re
ading out vehicle data in a specialist workshop.
Diagnostic devices should therefore only be con-
nected in a quali/ed specialist workshop. &
W
WARNING
ARNING Risk of accident due tocon-
necting devices tothe diagnostics con-
nection
If yo u connect devices tothe diagnostics con-
nection of theve hicle, the function of vehicle
systems and operating saf ety may be
impaired. #
For saf etyre asons, werecommend that
yo u only use and connect products
appr ovedby yo ur Mercedes-Benz service
centre. &
W
WARNING
ARNING Risk of accident due toobjects
in the driver's foot we ll
Objects in the driver's foot we ll may impede
pedal tr avel or block a depressed pedal.
This jeopardises the operating and road saf ety
of theve hicle. 38
38
Gene
ral no tes