2021 MERCEDES-BENZ B-CLASS HATCHBACK Owners Manual

to
European EN 228, or an equivalent
speci/cation.
Fu el of this speci/cation may contain up to
10% ethanol byvolume. Your vehicle is suita-
ble for use with E10 fuel. #
See the information label in fuel /ller 0ap
fo rot her compatible fuels .
Ne verre fuel wi thone of thefo llowing fuels:
R Diesel
R Regular petrol with an octane number
lo we rth an 91 RON
R Petrol with more than 3% me thanol byvol-
ume, e.g. M15, M30
R Petrol with additives containing me tal
If yo u ha veacciden tally refuelled wi th the
wrong fuel: #
Do not switch on theve hicle. #
Consult a quali/ed specialist workshop. The
following compatibility indications for fuel
apply toyour vehicle: 1
For petrol with maximum 5% ethanol byvol-
ume
2 For petrol with maximum 10% ethanol byvol-
ume
The compatibility indications for fuel on theve hi-
cle according tothe European standard EN 16942
can be found on the information label in the fuel
/ller 0ap or on the fuel dispenser or pump nozzle
suitable foryo ur vehicle thro ughout Europe.
If th eav ailable fuel is not su1ciently low in sul-
phur, this can produce unpleasant odours.
The recommended octane number foryo ur vehi-
cle can be found on the information label in the
fuel /ller 0ap. If
th ere commended fuel is not available, you may
also temp orarily use regular unleaded petrol with
an octane number of at least 91 RON.This may
re duce engine output and increase fuel consump-
tion.
Ne verre fuel using petrol wi than even lo werRO N.
Fu rther information on fuel can be obtained at a
/lling station or a quali/ed specialist workshop.
Inf
Inf or ormation on additiv
mation on additiv es in pe
es in petr
trol (v
ol (v ehicles with
ehicles with
pe
pe tr
trol engine)
ol engine)
No tethe inst ructions about operating 0uids
(/ page 396).
* NO
NOTE
TEDamage from use of unsui table
additives Even small amounts of
the wrong additive may
lead tomalfunctions occur ring. #
Only add cleaning additives recommen-
ded byMercedes-Benz tothe fuel. Mercedes-Benz
recommends that you use brand-
name fuels with additives. 398
398
Te
ch nical data

In some countries,
the fuel available may not ha ve
su1cient additives. Deposits could build up in the
fuel injection system as a result. In this case, in
consultation with a Mercedes-Benz service
centre, mix the fuel with the cleaning additive rec-
ommended byMercedes-Benz. Obser vethe no tes
and mixing ratios indica ted on theta nk.
Inf
Inf or
ormation on fuel q
mation on fuel q uality f
uality for v
or vehicles wit
ehicles wit h a die-
h a die-
sel engine
sel engine
Gener Gener al not
al notes
es
No tethe inst ructions about operating 0uids
(/ page 396). &
W
W ARNING
ARNING Risk of /re from fuel mixture
If yo u mix diesel fuel with petrol, the 0ash
point of the fuel mixture is lo werth an that of
pure diesel fuel. #
Neverre fuel using petrol in diesel
engines. #
Never mix petrol with diesel fuel. *
N
NOOTE
TE Damage caused bythe wrong fuel Even small amounts of
the wrong fuel could
re sult in damage tothe fuel system, the
engine and the emission control system.
V V ehicles wit ehicles wit h a diesel par
h a diesel par ticulat
ticulate
e/lt
/lt er:
er: #
Only refuel using sulphur-free diesel fuel
th at conforms toEuropean standard
EN 590, or an equivalent speci/cation.
In count ries without sulphur-free diesel
fuel, refuel using only lo w-sulphur diesel
fuel with a sulphur content less than
50 ppm.
V
V ehicle wit
ehicle wit hout diesel par
hout diesel par ticulat
ticulate
e/lt
/lt er:
er: #
Only refuel using diesel fuel wi tha sul-
phur content less than 500 ppm.
Ne verre fuel wi thone of thefo llowing fuels:
R Petrol
R Marine diesel
R Heating oil R
Pure fatty acid me thyl ester or veget able
oil
R Para1n or kerosene
If yo u ha veacciden tally refuelled wi th the
wrong fuel: #
Do not switch on theve hicle. #
Consult a quali/ed specialist workshop. The
following compatibility indication for fuel
applies toyour vehicle: 1
For diesel fuel with a maximum of 7% byvol-
ume bio-diesel (fatty acid me thyl ester) Te
ch nical data
399
399

Ac
cording toEuropean standard EN 16942 you
can /nd the compatibility indications at thefo l-
lowing locations:
R Ontheve hicle on the information label in the
fuel /ller 0ap (/ page 191)
R Onthe fuel dispenser or pump nozzle suitable
fo ryo ur vehicle thro ughout Europe
Inf
Inf or ormation on lo
mation on lo w outside t
w outside tem
emper
per atur
atur es
es
Re fuel your vehicle with as much winter diesel fuel
as possible at the beginning of winter.
Before changing overto winter diesel fuel, the fuel
ta nk should be em pty, if possible. When /rst refu-
elling wi thwinter diesel fuel, keep the fuel le vel
lo w, e.g. toreser veleve l. The fuel tank can be /l-
led as usual when next refuelling.
Fu rther information on fuel can be obtained at a
/lling station or a quali/ed specialist workshop.
T
T ank cont
ank cont ent and fuel r
ent and fuel r eserve
eser ve
No
No t f
t for plug-in h
or plug-in h ybr
ybrid:
id:
The tota l capacity of the fuel tank may vary,
depending on theve hicle equipment. F
F
uel t
uel t anktot
ank total capacity
al capacity Model
Model
B 200 4MATIC
B 220 d 4MATIC
B 250 4MATIC
51.0 lit
res
B 220 d
B 250 43.0 litres
or
51.0 litres
All other model s4 3.0 litres R R
eserv
eserv e fuel t
e fuel t ank
ank Model
Model
All models
5.0 litres T T
o
o t
tal capacity of fuel t
al capacity of fuel t ank (plug-in h
ank (plug-in hybr
ybrid)
id) Model
Model
B 250
e3 5.0 litres F F
uel t
uel t ank r
ank r eserv
eserv e (plug-in h
e (plug-in h ybr
ybrid)
id) Model
Model
B 250
e5 .0 litres A A
dBlue
dBlue ®
®
(v
(vehicles wit
ehicles wit h a diesel engine onl
h a diesel engine onl y)
y) N
No
ot
tes on A
es on A dBlue
dBlue®
®
Obser vethe no tes on operating 0uids
(/ page 396).
Ad Blue ®
is a water-soluble 0uid forth e NOx
ex haust gas aTertreatment of diesel engines.
It may be improper or punishable in some coun-
tries tooperate a vehicle that uses no AdBlue ®
or
one that does not comply with the speci/cations
of these operator's manual.
* NO
NO TE
TEMalfunctions due tothe dilution of
Ad Blue ®
or the use of additive-enhanced
Ad Blue ® The function of
the NOx exhaust gas aTer-
treatment can be impaired bythe use of
unsuitable denoxi/cation agents. 400
400
Te
ch nical data

#
Only use AdBlue ®
in acco rdance with
ISO 22241. #
Do not dilu teAd Blue ®
wi th wa ter. #
Do not use additive-enhanced AdBlue ®
. *
N
NO OTE
TE Dama geand malfunctions due to
impurities in AdBlue ® Consequences of impurities in
AdBlue ®
:
R increased emission values
R damage tothe catalytic con verter
R NOx exhaust gas aTertreatment malfunc-
tions #
Avoid impurities in AdBlue ®
. Ad
Blue ®
residues cr ystallise aTer a period of
time, and contaminate the sur faces with which
th ey come into contact. Clean the dirty sur faces
with water as soon as possible.
When you open theAd Blue ®
tank, small amounts
of ammonia vapour may escape. Do not inhale any ammonia
vapours that may be released. Only
/ll theAd Blue ®
tank in well-ventilated areas.
A
A dBlue
dBlue ®
®
/lling
/lling capacity and consump
capacity and consump tion
tion
Tot
Tot al capacity of A
al capacity of A dBlue
dBlue®
®
t
tank
ank Model
Tot
Mode lT otal capacity
al capacity
All model s2 3.8 litres A
A
dBlue
dBlue ®
®
consump
consump tion
tion
The average AdBlue ®
consu mption is between 1%
and 5% of fuel consum ption. Like fuel consump-
tion, AdBlue ®
consu mption is high lydependent
upon driving style and operating conditions. For
th is reason, your vehicle's actual consu mption /g-
ures under da y-to -day operating conditions may
di.er from the consum ption /gures calculate d.
The frequency at which you will ha veto to p up
Ad Blue ®
will also vary. Ha vetheAd Blue ®
supply
ch ecked at a quali/ed specialist workshop before
making jou rney s outside of Europe. Before a lon-
ge r st ayoutside of Europe, consult a quali/ed
specialist workshop. A
A
dBlue
dBlue ®
®
r
rang
ang e and
e and /ll
/lllev
level
el
The AdBlue ®
/ll le vel and range can be displa yed
via the on-board computer. The AdBlue ®
range
sh ow n depends strongly on the driving style and
operating conditions. The actual range can there-
fo re deviate from thera nge cur rently displa yed in
th e on-board computer. The information supplied
in the operator's manual rega rding there ser ve
qu antity at the /rst display warning and on the
minimum top-up quantity when the fuel tank is
em pty is also tobe understood as guide values. Engine oil
Engine oil
N
No
ot
tes on engine oil
es on engine oil
Obser vethe no tes on operating 0uids
(/ page 396). Te
ch nical data
401
401

*
N
NO
OTE
TE Engine damage caused byan inco r-
re ct oil /lter, incor rect oil or additi ves #
Do not use engine oils or oil /lters other
th an those which meet the speci/cations
necessary forth e prescribed service
inter vals. #
Do not alter the engine oil or oil /lter in
order toachie velonger change inter vals
th an prescribed. #
Do not use additives. #
Have the engine oil changed aTer the
prescribed inter vals. Mercedes-Benz
recommends having the oil
ch anged at a quali/ed specialist workshop.
Only use engine oils appr ovedfo ryo ur vehicle by
Mercedes-Benz.
P
P e etr
tr ol engines:
ol engines: for cer tain countries, di.erent
engine oils can be used in conjunction with
re duced maintenance inter vals. Further informa-
tion on di.erent engine oils can be obtained at a
qu ali/ed specialist workshop.
Quality and capacity of engine oil
Quality and capacity of engine oil
No No t f
t for plug-in h
or plug-in h ybr
ybrid:
id:
Engine oil
Engine oil speci/cations
speci/cations (pe
(petr
trol engines)
ol engines) Model
Model
MB-Fr
MB-Freig
eigabe or MB-
abe or MB-
Appr ov
Approv al
al
All models 229.51, 229.52,
229.61, 229.71*, 229.72 Engine oil
Engine oil
speci/cations
speci/cations (diesel engines)
(diesel engines) Model
Model
MB-Fr
MB-Freig
eigabe or MB-
abe or MB-
Approv
Approv al
al
All models 229.52, 229.61,
229.71*, 229.72 *
re commended for fuel consum ption
To achie vethe lo west possible fuel consum ption,
it is recommended touse the engine oil speci/ca-
tions mar ked in theta ble forth e lo westSA E vis-
cosity class. Obser veany possible restrictions of
th e appr ovedSA E viscosity classes.
% Ifth e engine oils listed in theta ble are not
av ailable, you may add a maximum of 1.0 litre
of thefo llowing engine oils once onl y.
V
V ehicles wit
ehicles wit h a pe
h a petr
trol engine:
ol engine: MB-Freigabe or
MB-Appr oval 229.31 or ACEA C3
V
V ehicles wit
ehicles wit h a diesel engine:
h a diesel engine: ACEA C3
No
No t f
t for plug-in h
or plug-in h ybr
ybrid:
id: 402
402
Te
ch nical data

Engine oil
Engine oil
/lling
/llingcapacity
capacity Model
Model
Capacity
Capacity
B 160
B 180, (manual and
automatic transmis-
sion)
B 200, (manual and
automatic transmis-
sion)
B 200 4MATIC 5.1 litres
B 250
B 250 4MATIC 5.5 litres
All other model s6 .8 litres The speci/e
d/lling capacity refers to an oil
ch ange with the oil /lter. Engine oil Engine oil
speci/cation
speci/cation (plug-in h
(plug-in hybr
ybrid)
id) Model
Model
MB-Fr
MB-Freig
eigabe or MB-
abe or MB-
Appr ov
Approv al
al
B 250 e2 29.51, 229.52,
229.61, 229.71*, 229.72 *
re commended forth e lo west possible fuel con-
su mp tion
To achie vethe lo west possible fuel consum ption,
it is recommended touse the engine oil speci/ca-
tions mar ked in theta ble forth e lo westSA E vis-
cosity class. Obser veany possible restrictions of
th e appr ovedSA E viscosity classes.
% Ifth e engine oils listed in theta ble are not
av ailable, you may add a maximum of 1.0 litre
of engine oils with MB-F reigabe or MB-
Appr oval 229.31 or ACEA C3 once onl y.
Engine oil capacity (plug-in h
Engine oil capacity (plug-in h ybr
ybrid)
id) Model
Model
Capacity
Capacity
B 250 e4 .5 litres The speci/e
d/lling capacity refers to an oil
ch ange with the oil /lter. N
No
ot
tes on br
es on br ak
ake
e0uid
0uid No
tethe inst ructions about operating 0uids
(/ page 396). &
W
WARNING
ARNING Risk of an accident due to
va pour poc kets form ing in the brake sys-
tem
The brake 0uid constantly absorbs moisture
from the air. This lo wersthe boiling point of
th e brake 0uid. If the boiling point is too lo w,
va pour poc kets may form inthe brake system
when the brakes are applied hard.
This impairs the braking e.ect. #
Have the brake 0uid rene we d at the
speci/ed inter vals. Ha
ve the brake 0uid regula rly re placed at a quali-
/ed specialist workshop.
Only use a brake 0uid appr ovedby Mercedes-
Benz according toMB-F reigabe or MB-Appr oval
331.0. Te
ch nical data
403 403

Coolant
Coolant
N
No
ot
tes on coolant
es on coolant
Obser vethe no tes on operating 0uids
(/ page 396). &
W
WARNING
ARNING Risk of /re‑ and injury from
antif reeze
If antifreeze comes into contact with hot com-
ponent parts in the engine compartment, it
may ignite. #
Allow the engine tocool down before
yo uto p up the antifreeze. #
Make sure that no antif reeze spills out
next tothe /ller opening. #
Thoroughly clean the antifreeze from
component parts before starting the
ve hicle. *
N
NOOTE
TE Damage caused byincor rect cool-
ant #
Only use coolant that has been premixed
with there qu ired antifreeze pr otection. Information on coolant is
available at thefo l-
lowing locations:
R Inthe Mercedes-Benz Speci/cation for
Operating Fluids 320.1
- Athttps://be vo.mercedes-benz.com
- Inthe Mercedes-Benz BeVo App
R Ataqu ali/ed specialist workshop *
N NOOTE
TE Overheating at high outside temp er-
atures If an inappropriate coolant is used,
the engine
cooling system is not su1ciently pr otected
against overheating and cor rosion at high out-
side temp eratures. #
Only use coolant appr ovedby Mercedes-
Benz. #
Obser vethe inst ructions in the
Mercedes-Benz Speci/cations for Oper-
ating Fluids 320.1. Ha
ve the coolant regula rly re placed at a quali/ed
specialist workshop. Proportion of antif
reeze concentrate in the engine
cooling system:
R A minimum of 50% (antifreeze pr otection down
to about -37°C)
R A maximum of 55% (antif reeze pr otection
down to-45°C) N No
ot
tes on windscr
es on windscr een w
een washer
asher 0uid
0uid Obser
vethe no tes on operating 0uids
(/ page 396). &
W
WARNING
ARNING ‑ Risk of /re and injury due to
windscreen washer concent rate
Wi ndsc reen washer concent rate is highly 0am-
mable. It could ignite if it comes into contact
with hot engine component parts or the
ex haust system. #
Make sure that no windscreen washer
concent rate spills out next tothe /ller
opening. 404
404
Te
ch nical data

*
N
N O
OTE
TE Damage totheex terior lighting due
to unsuitable windscreen washer 0uid Unsuitable windscreen
washer 0uids may
damage the plastic sur face of theex terior
lighting. #
Only use windscreen washer 0uids which
are also suitable for use on plastic sur fa-
ces, e.g. MB SummerFit or MB WinterFit. *
N
NO OTE
TE Bloc ked spr aynozzles caused by
mixing windscreen washer 0uids #
Do not mix MB SummerFit and MB Win-
te rFit with other windscreen washer 0u-
ids. Do not use distilled or de-ionised
water. Other-
wise, the /ll le vel sensor may be triggered er rone-
ous ly.
Re commended windscreen washer 0uid:
R abo vefreezing point: e.g. MB SummerFit
R below freezing point: e.g. MB WinterFit Fo
rth e cor rect mixing ratio, referto the informa-
tion on the antifreeze container.
Mix washer 0uid with windscreen washer 0uid all
ye ar round. V
V
ehicle data
ehicle data V
V ehicle dimensions
ehicle dimensions The heights speci/ed may
vary as a result of the
fo llowing factors:
R tyres
R load
R condition of the suspension
R optional equipment 1
Vehicle height with tailgate open
2 Height of the opened tailgate
N
No ot f
t f or plug-in h
or plug-in h ybr
ybrid:
id: Te
ch nical data
405
405