MERCEDES-BENZ B-CLASS HATCHBACK 2022 Owners Manual

+
ENVIRONMENTAL NOTE
En vironmental
pollution caused by environmentally irre-
sponsible disposal Tyre sealant contains pollutants.

Have the tyre sealant bottle disposed of
pr
ofessionally, e.g. at a Mercedes-Benz
Service Centre. 
Stow the tyre sealant bottle, the tyre inOation
com
pressor and the warning triangle. 
Pull away immediately. 
Stop driving aser appr
oximately ten minutes
and check the tyre pressure using the tyre
inOation compressor.
The tyre pressure must now be at least
130 kPa (1.3 bar/19 psi). &
WARNING Risk of accident due t
o the
speciNed tyre pressure not being attained
If the speciNed tyr
e pressure is not reached,
the tyre is too badly damaged. The tyre seal-
ant cannot repair the tyre in this instance. The braking and driving characteristics may be
g

reatly impaired. 
Do not continue driving. 
Consult a q
ualiNed specialist workshop. Countries that have Mercedes-Benz Service24h:
y

ou will Nnd a sticker with the telephone number,
e.g. on the B!

Battery (vehicle)
Notes on the 12 V battery
&
WARNING Risk of e xplosion due to elec-
trostatic charge
Electrostatic charge can ignite the highly
e
xplosive gas mixture in the battery. 
To discharge any electrostatic charge
t
hat may have built up, touch the metal
vehicle body before handling the battery. The highly
Oammable g
as mixture is created while
the battery is charging and during starting assis-
tance.
For safety reasons, Mercedes-Benz recommends
that you only use batteries which have been tes-
ted and approved for your vehicle by Mercedes-
Benz. &
WARNING Dang
er of chemical burns from
the battery acid
Battery acid is caustic. 
Avoid contact with the skin, eyes or
clo

thing. 
Do not lean over the battery. 
Do not inhale battery gases. 
Keep children away from the battery. 
Immediately rinse battery acid oM t
hor-
oughly with plenty of clean water and
seek medical attention immediately. +
ENVIRONMENTAL NOTE
En
vironmental
damage due to improper disposal of bat-
teries Batteries contain pollutants. It is
illeg

al to dispose of them with the household
rubbish. 
Dispose of batteries in an
en

vironmentally responsible manner. Take discharged batteries to a
q
ualiNed
specialist workshop or to a collection
point for used batteries. If you have to disconnect the 12 V battery, con-
t
act a qualiNed specialist workshop.
Comply with safety notes and take protective
measures when handling batteries. Risk of explosion.
Fire, naked
Oames and smoking ar
e
prohibited when handling the battery.
Avoid creating sparks. Electrolyte or battery acid is corrosive.
A

void contact with the skin, eyes or
clothing. Wear suitable protective
clothing, in particular gloves, an apron
and a face mask. Immediately rinse
electrolyte or acid splashes oM with
clean water. Consult a doctor if neces-
sary. Breakdown assistance
369

Wear safety glasses.
Keep children away.
Observe this Owner's Manual.
If you do not intend to use the vehicle over an
e xtended period of time:
= activate standby mode, or
= connect the battery to a battery charger
approved by Mercedes-Benz, or
= consult a qualiNed specialist workshop to dis-
connect the battery Notes on starting assistance and charging the 12
V batt

ery When charging the battery and during starting
assis

tance, always use the jump-start connection
point in the engine compartment.
* NOTE Damag
e to the battery due to over-
voltage When charging using a battery charger without
a maximum c
harging voltage, the battery or
the on-board electronics may be damaged. 
Only use battery chargers with a maxi-
mum c

harging voltage of 14.8 V. &
WARNING Risk of e
xplosion due to the
ignition of hydrogen gas
If there is a short circuit or sparks are created,
t
here is a danger of hydrogen gas igniting
when you charge the battery. 
Make sure that the POSITIVE terminal of
a connect

ed battery does not come into
contact with vehicle parts. 
Never place metal objects or tools on a
batt
ery. 
When connecting and disconnecting the
batt
ery, always observe the sequence of
battery terminals described. 
During starting assistance, always take
car

e to connect only battery terminals of
identical polarity. 
During starting assistance, observe the
seq
uence described for connecting and
disconnecting the jump leads. 
Do not connect or disconnect the bat-
t

ery terminals with the engine running. &
WARNING Risk of e
xplosion due to explo-
sive mixture of gases
An explosive mixture of gases can escape
fr
om the battery during charging and starting
assistance. 
Fire, naked Oames, smoking and cr
eating
sparks must be avoided. 
Make sure there is adequate ventilation. 370
Breakdown assistance


Do not stand over the battery. &
WARNING Risk of e xplosion from a frozen
battery
A discharged battery may freeze at tempera-
tur
es slightly above or below freezing point.
During starting assistance or battery charging,
battery gas can be released. 
Always allow a battery to thaw before
c
harging it or performing starting assis-
tance. If the indicator/warning lamps in the instrument
clus
ter do not light up at low temperatures, it is
very likely that the discharged battery has frozen.
In this case you may neither jump-start the vehi-
cle nor charge the battery.
The service life of a battery that has been thawed
may be dramatically shortened. The starting char-
acteristics may be impaired, especially at low
temperatures.
It is recommended that you have a thawed battery
checked at a qualiNed specialist workshop. *
NOTE Damag
e caused by numerous or
extended attempts to start the engine Numerous or extended attempts to start the
engine ma

y damage the catalytic converter
due to non-combusted fuel. 
Avoid numerous and extended attempts
t

o start the engine. Observe the following points during starting assis-
t
ance and when charging the battery:
= Only use undamaged jump lead/charging
cables with a suPcient cross-section and
insulated terminal clamps.
= Non-insulated parts of the terminal clamps
must not come into contact with other metal
parts while the jump lead/charging cable is
connected to the battery/jump-start connec-
tion point.
= The jump lead/charging cable must not come
into contact with any parts which may move
when the engine is running.
= Always make sure that neither you nor the bat-
tery is electrostatically charged. =
K
eep away from Nre and naked Oames.
= Do not lean over the battery.
Observe the additional following points when
charging the battery:
= Only use battery chargers tested and
approved for Mercedes-Benz.
= Read the battery charger's operating instruc-
tions before charging the battery.
Observe the additional following points during
starting assistance: = For starting assistance, only use batteries with
a nominal voltage of 12 V.
= The vehicles must not touch.
= Petrol engine: only accept starting assistance
if the engine and exhaust system are cold. Starting assistance and charging the 12 V battery
Requirements:
= The v

ehicle is secured with the electric park-
ing brake. Breakdown assistance
371

=
A utomatic transmission: the transmission is in
position j.
= Manual transmission: the transmission is in
neutral.
= The vehicle and all electrical consumers are
switched oM.
= The bonnet is open. 
Slide cover 1 of positiv e clamp 2 on the
jump-starting connection point in the direction
of the arrow. 
Connect positive clamp 2 on y
our vehicle to
the positive pole of the donor battery using
the jump lead/charging cable. Always begin
with positive clamp 2 on your own vehicle
Nrst. 
During starting assistance: s
tart the engine of
the donor vehicle and run at idle speed. 
Connect the negative pole of the donor bat-
t
ery and earth point 3 of your own vehicle by
using the jump lead/charging cable. Begin
with the donor battery Nrst. 
During starting assistance: s
tart the engine of
your own vehicle. 
During the charging process: s
tart the charg-
ing process. 
During starting assistance: le
t the engines run
for several minutes. 
During starting assistance: bef
ore disconnect-
ing the jump lead, switch on an electrical con- sumer on your own vehicle, e.g. the rear win-
do

w heater or lighting.
When the starting assistance/charging process is
com
plete: 
First, remove the jump lead/charging cable
fr
om earth point 3 and the negative pole of
the donor battery, then from positive clamp
2 and the positive pole of the donor battery.
Begin each time with the contacts on your
own vehicle Nrst. 
Aser r
emoving the jump lead/charging cable,
close cover 1 of positive clamp 2.
Plug-in hybrid: if y
our vehicle has been started
with starting assistance, it may not be possible to
use the electric drive for approximately 30
minutes.
Further information can be obtained at a qualiNed
specialist workshop. Replacing the 12 V battery

Observe the notes on the 12 V battery
( pag
e 369). 372
Breakdown assistance

Mercedes-Benz recommends that you have the
12 V batt
ery replaced at a qualiNed specialist
workshop, e.g. at a Mercedes-Benz Service
Centre.
Observe the following notes if you want to replace
the battery yourself:
= Always replace a faulty battery with a battery
which meets the speciNc vehicle require-
ments.
The vehicle is equipped with a Oeece battery.
Full vehicle functionality is only guaranteed
with a Oeece battery. For safety reasons,
Mercedes-Benz recommends that you only
use batteries which have been tested and
approved for your vehicle by Mercedes-Benz.
= Use detachable parts such as vent hoses,
elbow Nttings or terminal covers from the bat-
tery which is to be replaced.
= Make sure that the vent hose is always con-
nected to the original opening on the side of
the battery.
Fit any existing or supplied cell caps.
Otherwise, gases or battery acid could
escape. =
Mak e sure that detachable parts are recon-
nected in the same way. Tow-starting or towing away
Overview of permissible towing methods (not
plug-in h

ybrid) Permitted towing methods
Mer

cedes-Benz recommends transporting your
vehicle in the case of a breakdown, rather than
towing it away.
For towing, use a tow rope or tow bar with both
axles on the ground. Do not use tow bar systems. &
WARNING Risk of accident when t
owing
with steering wheel lock
If the steering wheel lock is engaged, you will
no
t be able to steer the vehicle. 
When towing with a tow rope or tow bar,
alw

ays switch on the vehicle. *
NOTE Damag
e to the vehicle due to tow-
ing away incorrectly 
Observe the instructions and notes on
t

owing away. Vehicles with manual transmission
Both axles on
t

he ground Yes, maximum 50 km at
50 km/h
Front axle
r
aised Yes, maximum 50 km at
50 km/h
Rear axle
r
aised Yes, maximum 50 km at
50 km/h Vehicles with automatic transmission
Both axles on
t

he ground Yes, maximum 50 km at
50 km/h
Front axle
r
aised Yes, maximum 50 km at
50 km/h
Rear axle
r
aised Yes, maximum 50 km at
50 km/h Breakdown assistance
373

4MATIC vehicles
Both axles on
t
he ground Yes, maximum 50 km at
50 km/h
Front axle
r
aised No
Rear axle
r
aised No Towing with a raised axle:
t
owing should be per-
formed by a towing company. Overview of permitted towing methods (plug-in
h

ybrid) Mercedes-Benz recommends transporting your
v
ehicle in the case of a breakdown, rather than
towing it away. For towing, use a tow rope or tow bar with both
axles on t

he ground. Do not use tow bar systems.
* NOTE Damag
e to the vehicle due to tow-
ing away incorrectly 
Observe the instructions and notes on
t

owing away. Observe the information on towing and transport-
ing t

he vehicle in the vehicle Owner's Manual.
Permitted towing methods Vehicle equipment/towing method
Both axles on the ground Front axle raised Rear axle raised
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 s
teering wheel must be Nxed in
the centre position with a steering
wheel lock. 374
Breakdown assistance

In the following situations, only transporting the
v ehicle is permitted:
= the multifunction display is not working
or
= the


Information on the permissible gross mass of
t
he vehicle can be found on the vehicle identi-
Ncation plate ( page 402). 
Vehicles with automatic transmission: do no
t
open the driver's door or front passenger
door; the transmission otherwise automati-
cally shiss to position j. 
Fit the towing eye ( pag
e 378).
Fasten the towing device.
* NOTE Damag
e due to incorrect connec-
tion of the tow bar 
Only connect the tow rope or tow bar to
t
he towing eyes. 
Deactivate the automatic locking mechanism
( pag

e 89). 
Do not activate the HOLD function. 
Deactivate tow-away protection
( pag

e 106). 
Deactivate Active Brake Assist ( pag
e 254).
Vehicles with automatic transmission: shis t
o
position i. 
Vehicles with manual transmission: shis t
o
neutral. 
Release the electric parking brake. &
WARNING Risk of accident due t
o limited
safety-related functions during the towing
process
Safety-related functions are limited or no lon-
g
er available in the following situations:
= the vehicle is switched oM.
= the brake system or power steering system
is malfunctioning.
= the energy supply or the on-board electri-
cal system is malfunctioning.
When your vehicle is towed away, signiNcantly
more eMort may be required to steer and
brake than is normally required. 
Use a tow bar. 
Make sure that the steering wheel can
mo

ve freely before towing the vehicle
away. *
NOTE Damag
e due to excessive tractive
power If you pull away sharply, the tractive power
ma

y be too high and the vehicles could be
damaged. 
Pull away slowly and smoothly. Loading the vehicle for transport
Hybrid vehicles:
tr
ansportation of vehicles should
only be carried out by professional recovery com-
panies. 
Observe the notes on towing away
( pag
e 375). 
Connect the towing device to the towing eye
in or

der to load the vehicle.
% You can also attach the tow bar to the trailer
hitc
h. 
Vehicles with automatic transmission: shis t
he
automatic transmission to position i.376
Breakdown assistance

%
Vehicles with automatic transmission: t he
automatic transmission may be locked in posi-
tion j in the event of damage to the electri-
cal system. To shis to i, provide the on-
board electrical system with power
(  page 371). 
Vehicles with manual transmission: shis t
o
neutral. 
Load the vehicle onto the transporter. 
Vehicles with automatic transmission: shis t
he
automatic transmission to position j.
Vehicles with manual transmission: eng
age
Nrst or reverse gear. 
Use the electric parking brake to secure the
v

ehicle against rolling away. 
Only secure the vehicle by the wheels. Vehicles with adaptive damping adjustment &
WARNING Risk of an accident when tr
ans-
porting vehicles with adaptive damping
adjustment
When transporting vehicles with adaptive
dam
ping adjustment, the vehicle/trailer com-
bination may begin to rock and start to skid. 
Load the vehicle correctly onto the
tr
ansporter. 
Secure the vehicle on all four wheels
wit

h suitable tensioning straps. *
NOTE Damag
e to the vehicle from secur-
ing it incorrectly 
Aser loading, t
he vehicle must be
secured on all four wheels. Otherwise,
the vehicle could be damaged. 
A minimum distance of 20 cm upwards
and 10 cm
downwards must be kept to
the transport platform. 
Secure the vehicle on all four wheels aser
loading.
4MATIC vehicles/vehicles with automatic trans-
mission 
Make sure that the front and rear axles come
t
o rest on the same transportation vehicle.
* NOTE Damag
e to the drive train due to
incorrect positioning of the vehicle 
Do not position the vehicle above the
connection point of t

he transport vehi-
cle. Breakdown assistance
377