2022 MERCEDES-BENZ B-CLASS HATCHBACK Owners Manual

to European EN 228, or an equivalent
speciNcation.
Fuel of this speciNcation ma y contain up to
10% ethanol by volume. Your vehicle is suita-
ble for use with E10 fuel. 
See the information label in fuel Nller Oap
f
or other compatible fuels .
Never refuel with one of the following fuels: = Diesel
= R

egular petrol with an octane number
lower than 91 RON
= Petrol with more than 3% methanol by vol-
ume, e.g. M15, M30
= Petrol with additives containing metal
If you have accidentally refuelled with the
wrong fuel: 
Do not switch on the vehicle. 
Consult a q
ualiNed specialist workshop.The following compatibility indications for fuel
appl

y to your vehicle: 1
For petrol with a maximum of 5% ethanol by
v
olume
2 For petrol with a maximum of 10% ethanol by
v
olume
The compatibility indications for fuel on the vehi-
cle accor
ding to European standard EN 16942
can be found on the information label on the fuel
Nller Oap or on the fuel dispenser or pump nozzle
suitable for your vehicle throughout Europe.
If the available fuel is not suPciently low in sul-
phur, it may produce unpleasant odours.
The recommended octane number for your vehi-
cle can be found on the information label on the
fuel Nller Oap. If the recommended fuel is not available, you may
also t
emporarily use regular unleaded petrol with
an octane number of at least 91 RON. This may
reduce engine output and increase fuel consump-
tion.
Never refuel using petrol with an even lower RON.
Further information on fuel can be obtained at a
Nlling station or a qualiNed specialist workshop.
Information on additives in petrol (vehicles with
petrol engine)
Observe the notes on operating Ouids
( page 404).
* NOTE Damag
e from use of unsuitable
additives Even small amounts of the wrong additive may
lead t
o malfunctions occurring. 
Only add cleaning additives recommen-
ded b

y Mercedes-Benz to the fuel. Mercedes-Benz recommends that you use brand-
name fuels wit

h additives.406
Technical data

In some countries, the fuel available may not have
suPcient
additiv
es. 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 by Mercedes-Benz. Observe the notes
and mixing ratios indicated on the tank.
Information on fuel quality for vehicles with a die-
sel engine
General notes
Observe the notes on operating Ouids
(  page 404). &
WARNING Risk of Nr
e from fuel mixture
If you mix diesel fuel with petrol, the Oash
point of t
he fuel mixture is lower than that of
pure diesel fuel. 
Never refuel using petrol in diesel
engines. 
Never mix petrol with diesel fuel. *
NOTE Damag
e caused by the wrong fuel Even small amounts of the wrong fuel could
r

esult in damage to the fuel system, the
engine and the emission control system.
Vehicles with a diesel particulate Nlter: 
Only refuel using sulphur-free diesel fuel
t

hat conforms to European standard
EN 590, or an equivalent speciNcation.
In countries without sulphur-free diesel
fuel, refuel using only low-sulphur diesel
fuel with a sulphur content less than
50 ppm.
Vehicle without diesel particulate Nlt
er: 
Only refuel using diesel fuel with a sul-
phur cont

ent less than 500 ppm.
Never refuel with one of the following fuels: = P

etrol
= Marine diesel
= Heating oil =
Pur
e fatty acid methyl ester or vegetable
oil
= ParaPn or kerosene
If you have accidentally refuelled with the
wrong fuel: 
Do not switch on the vehicle. 
Consult a q
ualiNed specialist workshop. The following compatibility indications for fuel
appl

y to your vehicle: Technical data
407

1
For diesel fuel with a maximum of 7% fatty
acid me thyl ester by volume (bio-diesel)
2 For diesel fuel with a maximum of 10% fatty
acid me
thyl ester by volume (bio-diesel)
According to European standard EN 16942 you
can Nnd t

he compatibility indications at the fol-
lowing locations:
= On the vehicle on the information label on the
fuel Nller Oap ( page 196)
= On the fuel dispenser or pump nozzle suitable
for your vehicle throughout Europe Information on low outside temperatures
R

efuel your vehicle with as much winter diesel fuel
as possible at the beginning of winter.
Before changing over to winter diesel fuel, the fuel
tank should be empty, if possible. When Nrst refu-
elling with winter diesel fuel, keep the fuel level
low, e.g. to reserve level. The fuel tank can be Nl-
led as usual when next refuelling.
Further information on fuel can be obtained at a
Nlling station or a qualiNed specialist workshop.
Tank content and fuel reserve
Not for plug-in hybrid:
The total capacity of the fuel tank may vary,
depending on the vehicle equipment. Total fuel tank capacity Model
B 200 4MATIC
B 220 d 4MA

TIC
B 250 4MATIC 51.0 litres
B 220 d
B 250 43.0 litres
or
51.0 litr

es
All other models 43.0 litres Reserve fuel tank
Model
All models
5.0 litres Total capacity of fuel tank (plug-in hybrid)
Model
B 250 e
35.0 litres408
Technical data

Fuel tank reserve (plug-in hybrid)
Model
B 250 e
5.0 litresAdBlue
n
(vehicles with a diesel engine only) Notes on AdBlue
n
Obser
ve the notes on operating Ouids
(  page 404).
AdBlue n
is a water-soluble Ouid for the NOx
exhaust gas asertreatment of diesel engines.
It may be improper or punishable in some coun-
tries to operate a vehicle that uses no AdBlue n
or
one that does not comply with the speciNcations
of this Owner's Manual.
* NOTE Malfunctions due t
o the dilution of
AdBlue n
or the use of additive-enhanced
AdBlue n The function of the NOx exhaust gas
aser
-
treatment can be impaired by the use of
unsuitable denoxiNcation agents. 
Only use AdBlue n
in accor
dance with
ISO 22241. 
Do not dilute AdBlue n
wit
h water. 
Do not use additive-enhanced AdBlue n
. *
NOTE Damag
e and malfunctions due to
impurities in AdBlue n Consequences of impurities in AdBlue
n
:
= incr

eased emission values
= damage to the catalytic converter
= NOx exhaust gas asertreatment malfunc-
tions 
Avoid impurities in AdBlue n
. AdBlue
n
r
esidues crystallise aser a period of
time, and contaminate the surfaces with which
they come into contact. Clean the dirty surfaces
with water as soon as possible.
When you open the AdBlue n
tank, small amounts
of ammonia vapour may escape. Do not inhale any ammonia vapours that may be released. Only
Nll
t

he AdBlue n
tank in well-ventilated areas.
AdBlue n
Nlling capacity and consumption
Total capacity of AdBlue n
tank Model
Total capacity
All models 23.8 litres AdBlue
n
consum
ption
The average AdBlue n
consumption is between 1%
and 5% of fuel consumption. Like fuel consump-
tion, AdBlue n
consumption is highly dependent
upon driving style and operating conditions. For
this reason, your vehicle's actual consumption Ng-
ures in day-to-day operating conditions may diMer
from the consumption Ngures calculated. The fre-
quency at which you will have to top up AdBlue n
will also vary. Have the AdBlue n
supply checked
at a qualiNed specialist workshop before making
journeys outside Europe. Before a longer stay out-
side Europe, consult a qualiNed specialist work-
shop. Technical data
409

AdBlue
n
range and Nll level
The AdBlue n
Nll level and range can be displayed
via the on-board computer. The AdBlue n
range
shown depends strongly on the driving style and
operating conditions. The actual range may there-
fore deviate from the range currently displayed on
the on-board computer. The information supplied
in the Owner's Manual regarding the reserve
quantity at the Nrst display warning and the mini-
mum top-up quantity when the fuel tank is empty
is also to be understood as guide values. Engine oil
Notes on engine oil
Obser

ve the notes on operating Ouids
(  page 404). *
NOTE Engine damag
e caused by an incor-
rect oil Nlter, incorrect oil or additives 
Do not use engine oils or oil Nlt
ers other
than those which meet the speciNcations
necessary for the prescribed service
intervals. 
Do not alter the engine oil or oil Nlt
er in
order to achieve longer change intervals
than prescribed. 
Do not use additives. 
Have the engine oil changed aser t
he
prescribed intervals. Mercedes-Benz recommends having the oil
c

hanged at a qualiNed specialist workshop.
Only use engine oils approved for your vehicle by
Mercedes-Benz.
Petrol engines: for certain countries, diMerent
engine oils can be used in conjunction with
reduced maintenance intervals. Further informa-
tion on diMerent engine oils can be obtained at a
qualiNed specialist workshop.
Engine oil quality and Nlling capacity
Not for plug-in hybrid:
Engine oil speciNcation (petrol engines) Model
MB-Freigabe or MB-
Appr
oval
All models 229.51, 229.52,
229.61, 229.71,
229.72 1)
1) Recommended for lowest possible fuel consumption (lowest SAE
viscosity class in eac
h case; observe possible restrictions of the
approved SAE viscosity classes) 410
Technical data

Engine oil speciNcation
(diesel engines)Model
MB-Freigabe or MB-
Appr oval
All models 229.52, 229.61,
229.71, 229.72 1)
1) Recommended for lowest possible fuel consumption (lowest SAE
viscosity class in eac
h case; observe possible restrictions of the
approved SAE viscosity classes) To achieve the lowest possible fuel consumption,
it is r
ecommended to use the engine oil speciNca-
tions marked in the table for the lowest SAE vis-
cosity class. Observe any possible restrictions of
the approved SAE viscosity classes.
% If the engine oils listed in the table are not
a

vailable, you may add a maximum of 1.0 litre
of the following engine oils once only.
Vehicles with petrol engines: MB-Freigabe or
MB-Approval 229.31 or ACEA C3
Vehicles with diesel engines: ACEA C3
Not for plug-in hybrid: Engine oil Nlling
capacity Model
Capacity
B 160
B 180, (manual and
aut

omatic transmis-
sion)
B 200, (manual and
automatic transmis-
sion)
B 200 4MATIC 5.1 litres
B 250
B 250 4MA
TIC 5.5 litres
All other models 6.8 litres The speciNed
Nlling capacity r
efers to an oil
change with the oil Nlter. Engine oil speciNcation
(plug-in h
ybrid) Model
MB-Freigabe or MB-
Appr
oval
B 250 e 229.51, 229.52,
229.61, 229.71,
229.72 1)
1) Recommended for lowest possible fuel consumption (lowest SAE
viscosity class in eac
h case; observe possible restrictions of the
approved SAE viscosity classes) To achieve the lowest possible fuel consumption,
it is r
ecommended to use the engine oil speciNca-
tions marked in the table for the lowest SAE vis-
cosity class. Observe any possible restrictions of
the approved SAE viscosity classes.
% If the engine oils listed in the table are not
a

vailable, you may add a maximum of 1.0 litre
of engine oils with MB-Freigabe or MB-
Approval 229.31 or ACEA C3 once only. Technical data
411

Engine oil Nlling
capacity (plug-in h ybrid)Model
Capacity
B 250 e 5.1 litresThe speciNed
Nlling capacity r
efers to an oil
change with the oil Nlter.Notes on brake
OuidObserve the notes on operating
Ouids
(  pag

e 404). &
WARNING Risk of an accident due t
o
vapour pockets forming in the brake sys-
tem
The brake Ouid cons
tantly absorbs moisture
from the air. This lowers the boiling point of
the brake Ouid. If the boiling point is too low,
vapour pockets may form in the brake system
when the brakes are applied hard.
This impairs the braking eMect.
Have the brake Ouid r
enewed at the
speciNed intervals. Have the brake
Ouid r
egularly replaced at a quali-
Ned specialist workshop.
Only use a brake Ouid approved by Mercedes-
Benz according to MB-Freigabe or MB-Approval
331.0. Coolant
Notes on coolant
Obser

ve the notes on operating Ouids
(  page 404). &
WARNING Risk of Nr
e


Observe the instructions in the
Mer cedes-Benz SpeciNcations for Oper-
ating Fluids 320.1. Have the coolant regularly replaced at a
q
ualiNed
specialist workshop.
Proportion of antifreeze concentrate in the cool-
ing system:
= A minimum of 50% (antifreeze protection down
to about -37°C)
= A maximum of 55% (antifreeze protection
down to -45°C) Notes on windscreen washer
OuidObserve the notes on operating
Ouids
( pag
e 404). &
WARNING !