MERCEDES-BENZ B-CLASS HATCHBACK 2022 Owners Manual

Opening the bonnet

To release the bonnet, pull on handle 1. 
Push yellow handle 1 on t he bonnet catch to
the les as far as it will go (palm downwards).
Lis the bonnet until it is automatically raised
by the pneumatic spring.
Closing the bonnet 
Lower the bonnet and let it drop from a height
of appr

oximately 20 cm. 
If the bonnet can still be lised slightl
y, open
the bonnet again and close it with a little force
until it engages correctly. Engine oil
Checking the engine oil level using the on-board
com

puter
Requirements: = The engine has been warmed up.
= The vehicle is parked on a level surface.
= The engine is running at idle speed.
= The bonnet is closed.
The engine oil level is determined during driving.
Determining the engine oil level can take up to
30 minutes with a normal driving style and even
longer with an active driving style. 348
Maintenance and care

On-board computer:
4 Service 5
Engine oil level
One of t
he following messages will appear on the
instrument display:
= Engine oil level Measuring now : measurement
of the oil level is not yet possible. 
Repeat the request aser a maximum of
30 minut
es' driving.
= Engine oil level OK and t
he bar display for
indicating the oil level on the instrument dis-
play is green and is between "min" and "max":
the oil level is correct.
= Engine oil level Add 1,0 l and the bar display
for indicating the oil level on the instrument
display is orange and is below "min": 
Add 1 l of engine oil.
= Reduce engine oil level and t

he bar display for
indicating the oil level on the instrument dis-
play is orange and is above "max": 
Drain oM an
y excess engine oil that has been
added. To do so, consult a qualiNed specialist
workshop.
= For engine oil level turn on ignition 
Switch on the vehicle to check the engine oil
le

vel.
= Engine oil level System inoperative : The oil
le

vel sensor is defective or not connected. 
Consult a q
ualiNed specialist workshop.
= Engine oil level System currently unavail. 
Close the bonnet.
Topping up engine oil &
WARNING Risk of bur
ns from hot compo-
nent parts in the engine compartment
Certain component parts in the engine com-
par
tment can be very hot, e.g. the engine, the
cooler and parts of the exhaust system. 
Allow the engine to cool down and only
t
ouch component parts described in the
following. &
WARNING Risk of Nr
e and injury from
engine oil
If engine oil comes into contact with hot com-
ponent par
ts in the engine compartment, it
may ignite. 
Make sure that no engine oil is spilled
ne
xt to the Nller opening. 
Allow the engine to cool oM and t
hor-
oughly clean the engine oil from compo-
nent parts before starting the vehicle. *
NOTE Engine damag
e caused by an incor-
rect oil Nlter, incorrect oil or additives 
Do not use engine oils or oil Nlt
ers which
do not correspond to the speciNcations
explicitly prescribed for the service inter-
vals. 
Follow the instructions on the service
int

erval display for changing the engine
oil and observe the prescribed change
intervals. 
Do not use additives. Maintenance and care
349

*
NOTE Damag e caused by topping up too
much engine oil Too much engine oil can damage the engine or
t

he catalytic converter. 
Have excess engine oil removed at a
q

ualiNed specialist workshop. %
Depending on driving style, the vehicle con-
sumes up t
o 0.8 litre of oil per 1000 km. The
oil consumption may also be higher than this
when the vehicle is new or if you frequently
drive at high engine speeds. 
Turn cap 1 anti-cloc
kwise and remove it. 
Top up the engine oil. 
Replace cap 1 and tur
n it clockwise until it
engages. 
Check the oil level again (  pag
e 348). Checking the coolant level
&
WARNING Risk of bur
ns from hot compo-
nent parts in the engine compartment
Certain component parts in the engine com-
par
tment can be very hot, e.g. the engine, the
cooler and parts of the exhaust system. 
Allow the engine to cool down and only
t
ouch component parts described in the
following. &
WARNING Risk of scalding fr
om hot cool-
ant
If you open the cap, you could be scalded. 
Let the motor cool down before opening
t
he cap. 
When opening the cap, wear protective
glo

ves and safety glasses. 
Open the cap slowly to release pressure. 350
Maintenance and care


Park the vehicle on a level surface. 
Check the coolant temperature display on the
ins trument display.
The coolant temperature must be below 70°C. 
Slowly turn cap 1 anti-cloc
kwise to release
overpressure. 
Continue turning cap 1 anti-cloc
kwise and
remove it. The coolant level is correct in the following cases:
= If t

he engine is cold, the coolant is up to
marker bar 2.
= If the engine is warm, the coolant is up to
1.5 cm over marker bar 2. 
If necessary, r
eNll with coolant that has been
approved for Mercedes-Benz.
% Further information on coolant (  pag
e 412) Topping up the windscreen washer system
&
WARNING Risk of bur
ns from hot compo-
nent parts in the engine compartment
Certain component parts in the engine com-
par
tment can be very hot, e.g. the engine, the
cooler and parts of the exhaust system. 
Allow the engine to cool down and only
t
ouch component parts described in the
following. &
WARNING !


Remove cap 1 b y the tab.
Top up the washer Ouid.
% Further information about the windscreen
w

asher Ouid ( page 413) Keeping the air/water duct free

Keep the area between the bonnet and the
windscr
een free of deposits, e.g. ice, snow or
leaves. Cleaning and care
Information on washing the vehicle in a car wash
&
WARNING Risk of an accident due t
o
reduced braking power aser washing the
vehicle
Braking ePciency is r
educed aser washing the
vehicle. 
Aser t
he vehicle has been washed, brake
carefully while paying attention to the
traPc conditions until braking power has
been fully restored. *
NOTE Damag
e from automatic braking If one of the following functions is activated,
t
he vehicle brakes automatically in certain sit-
uations:
= Active Brake Assist
= Active Distance Assist DISTRONIC
= HOLD function
= Active Parking Assist
To avoid damage to the vehicle, deactivate
these systems in the following or similar situa-
tions: 
During towing. 
In a car wash. *
NOTE Damag
e due to unsuitable car wash 
Before driving into a car wash make sure
t

hat the car wash is suitable for the vehi-
cle dimensions. 352
Maintenance and care


Ensure there is suPcient g round clear-
ance between the underbody and the
guide rails of the car wash. 
Ensure that the clearance width of the
car w

ash, in particular the width of the
guide rails, is suPcient. To avoid damage to your vehicle when using a car
w
ash, ensure the following beforehand:
= Active Distance Assist DISTRONIC is deactiva-
ted.
= The HOLD function is switched oM.
= The side windows and sliding sunroof are com-
pletely closed.
= The blower for the ventilation and heating is
switched oM.
= The windscreen wiper switch is in position g.
= The key is at a minimum distance of 3 m away
from the vehicle. Otherwise the tailgate could
open unintentionally.
= For car washes with a conveyor system:
- neutral i is engaged. -
F
or vehicles with automatic transmission:
If you leave the vehicle while it is being
washed, make sure the key is located in
the vehicle. The park position j is other-
wise automatically engaged.
% If, aser t
he car wash, you remove the wax
from the windscreen and wiper rubbers, this
will prevent smearing and reduce wiper noise.
Automatic car wash mode
In car w
ash mode, the vehicle is prepared for driv-
ing into the automatic car wash. Car wash mode
can be activated at a speed of up to 20 km/h
(  page 354).
The following settings are adjusted when car wash
mode is activated: = The outside mirrors are folded in.
= To prevent the windscreen washer system
from starting up automatically, the rain sensor
is deactivated.
= The rear window wiper is deactivated.
= The windows and the sliding sunroof are
closed. =
The air conditioning sy
stem is set to air-recir-
culation mode.
= Parking Assist PARKTRONIC is deactivated.
= Vehicles with 360° Camera: The front image is
activated aser approx. eight seconds.
If one of the settings cannot be selected, this is
displayed by a behind the respective set-
ting.
Above a speed of 20 km/h car wash mode is
automatically deactivated.
The following settings are reset when car wash
mode is deactivated:
= The outside mirrors are folded out.
= The rain sensor is activated.
= The rear window wiper is activated.
= The air conditioning system is set to fresh air
mode.
= Parking Assist PARKTRONIC is reset to the
previously selected setting.
= The windows and the sliding sunroof remain
closed. Maintenance and care
353

=
V ehicles with 360° Camera: The front image is
deactivated at speeds above 18 km/h. Activating/deactivating automatic car wash mode
Requirements:
= The v

ehicle is stationary.
= The engine is running.
Multimedia system: 4 © 5
Settings 5
Quick access
Activating automatic car wash mode 
Select Car wash mode .
Select Start .
If one of the settings cannot be selected, this is
displa
yed by a behind the respective set-
ting.
% For an overview of the settings made when
activ
ating automatic car wash mode
(  page 352). Deactivating automatic car wash mode 
Select Stop.
The aut

omatic car wash settings are reset.
% The automatic car wash mode is automatically
deactiv

ated as soon as a speed of 20 km/h is
exceeded. Information on using a high-pressure cleaner
&
WARNING Risk of an accident when using
high-pr
essure cleaners with round-spray
nozzles
The water jet can cause externally invisible
damag
e.
Components damaged in this way may unex-
pectedly fail. 
Do not use a high-pressure cleaner with
r

ound-spray nozzles. 
Have damaged tyres or chassis parts
r

eplaced immediately. To avoid damage to your vehicle, observe the fol-
lo
wing when using a high-pressure cleaner:
= The key is at a minimum distance of 3 m away
from the vehicle. Otherwise the tailgate could
open unintentionally.
= Maintain a distance of at least 30 cm to the
vehicle.
= Vehicles with decorative foil: Parts of your
vehicle are covered with a decorative foil.
Maintain a distance of at least 70 cm between
the foil-covered parts of the vehicle and the
nozzle of the high-pressure cleaner. Move the
high-pressure cleaner nozzle around whilst
cleaning. The water temperature of the high-
pressure cleaner must not exceed 60°C.
= Observe the information on the correct dis-
tance in the equipment manufacturer's opera-
tor manual.
= Do not direct the nozzle of the high-pressure
cleaner directly at sensitive parts, e.g. tyres,
gaps, electrical component parts, batteries,
illuminants and louvres. 354
Maintenance and care

Washing the vehicle by hand
*
NOTE Engine damag e due to water ingress 
Take care not to point the water jet
dir

ectly towards the air inlet grille below
the bonnet. Observe the relevant legal requirements (e.g. in
some countr
ies, washing by hand is permitted
only in specially designated wash bays). 
Use a mild cleaning agent (e.g. car shampoo). 
Wash the vehicle with lukewarm water using a
sos car spong

e. When doing so, do not
expose the vehicle to direct sunlight. 
Carefully hose the vehicle oM wit
h water and
dry using a chamois.
% Observe the notes on the care of car parts
( pag

e 356). Notes on paintwork/matt
Nnish paintw
ork careTo avoid damaging the paintwork and interfering
wit

h the driving assistance systems, please
observe the following notes: Paint
= Insect r

emains: Soak with insect remover and
rinse oM the treated areas aserwards.
= Bird droppings: Soak with water and rinse oM
aserwards.
= Tree resin, oils, fuels and greases: remove by
rubbing gently with a cloth soaked in petro-
leum ether or lighter Ouid.
= Coolant and brake Ouid: remove with a damp
cloth and clean water.
= Tar stains: use tar remover.
= Wax: use silicone remover.
= Do not attach stickers, Nlms or similar materi-
als. Only have Nlm attached to the bumper at
a qualiNed specialist workshop.
= Remove dirt immediately, where possible.
Matt Nnish
= Only use care products approved for
Mercedes-Benz.
= Do not attach stickers, Nlms or similar materi-
als. Only have Nlm attached to the bumper at
a qualiNed specialist workshop. =
Do no t polish the vehicle and light-alloy
wheels.
= Only use car washes that correspond to the
latest engineering standards.
= Do not use car wash programmes with a Nnal
hot wax treatment.
= Do not use paint cleaners, buPng or polishing
products, gloss preservers, e.g. wax.
In the event of paintwork damage:
= Always have paintwork repairs carried out at a
qualiNed specialist workshop.
= Make sure the radar sensors function
( page 229). Notes on cleaning decorative foils
Observe the notes on matt
Nnish car
e in the chap-
ter "Notes on paintwork/matt Nnish paintwork
care" ( page 355). They also apply to matt dec-
orative foils.
Observe the notes on cleaning decorative foils to
avoid damage. Maintenance and care
355

Cleaning
= F
or cleaning, use plenty of water and a mild
cleaning agent without additives or abrasive
substances (e.g. a car shampoo approved for
Mercedes-Benz).
= Remove dirt as soon as possible. Avoid rub-
bing too hard in order to not irreparably dam-
age the decorative foil.
= If there is dirt on the Nnish or if the decorative
foil is dull: Use the Paint Cleaner recommen-
ded and approved for Mercedes-Benz.
= Insect remains: Soak with insect remover and
rinse oM the treated areas aserwards.
= Bird droppings: Soak with water and rinse oM
aserwards.
= To prevent water stains, dry a foil-wrapped
vehicle with a sos, absorbent cloth aser every
car wash.
Avoiding damage to the decorative foil = The service life and colouring of decorative
foils are impaired by:
- Sunlight
- Temperature (e.g. hot air blower) -
W eather conditions
- Stone chippings and dirt
- Chemical cleaning agents
- Oily products
= Do not use polish on matt decorative foil. Pol-
ishing will have the eMect of shining the foil-
wrapped surface.
= Do not treat matt or structured decorative
foils with wax. Permanent stains may occur.
Scratches, corrosive deposits, areas aMected by
corrosion and damage caused by incorrect care
cannot always be completely repaired. In this
case, contact a qualiNed specialist workshop.
You can obtain more information on care and
cleaning agents from the manufacturer.
In the case of foil-wrapped surfaces, optical diMer-
ences may occur between the surfaces that were
not protected by a decorative foil aser removing a
decorative foil.
% Have work or repairs to decorative foils car-
r
ied out at a qualiNed specialist workshop
(e.g. in a Mercedes-Benz Service Centre). Notes on care of car parts
&
WARNING Risk of entr
apment if the wind-
screen wipers are switched on while the
windscreen is being cleaned
If the windscreen wipers are set in motion
while y
ou are cleaning the windscreen or
wiper blades, you can be trapped by the wiper
arm. 
Always switch oM t
he windscreen wipers
and the vehicle before cleaning the wind-
screen or wiper blades. To avoid damage to the vehicle, observe the notes
on cleaning and car

e of the following car parts:
Wheels and rims
= Use water and acid-free alloy wheel cleaners.
= Do not use acidic alloy wheel cleaners to
remove brake dust. This could damage wheel
bolts and brake components.
= To avoid corrosion of the brake disks and
brakepads, drive the vehicle for a few minutes
aser cleaning before parking it. The brake
disks and brakepads warm up and dry out. 356
Maintenance and care

Windows
=
Clean t
he windows inside and outside with a
damp cloth and with a cleaning agent recom-
mended for Mercedes-Benz.
= Do not use dry cloths or abrasive or solvent-
based cleaning agents to clean the inside of
windows.
% Aser c
hanging the wiper blades or treating
the vehicle with wax, clean the windscreen
thoroughly with cleaning agents recommen-
ded for Mercedes-Benz. Failure to observe the
application instructions may result in damage,
smear marks or dazzling spots.
% Remove external fogging or dirt on the wind-
scr

een in front of the multifunction camera.
Otherwise, driving systems and driving safety
systems may be impaired or not available
(  page 229).
Wiper blades
= Mo

ve the wiper arms into the replacement
position (  page 154).
= With the wiper arms folded out, clean the
wiper blades with a damp cloth. %
Make sure that the wiper blades are coated.
The coating can lea

ve residues on a cloth. Do
not rub the wiper blades excessively or clean
them too osen.
Exterior lighting = Clean t

he lenses with a wet sponge and mild
cleaning agent (e.g. car shampoo).
= Only use cleaning agents or cleaning cloths
that are suitable for plastic lenses.
Vehicle socket (high-voltage battery) = Use clean water and a sos cloth to clean the
vehicle socket.
= Do not use high-pressure cleaners or cleaning
agents such as soap.
Sensors = Clean the sensors in the front and rear bump-
ers with a sos cloth and car shampoo
( page 229).
= When using a high-pressure cleaner, maintain
a minimum distance of 30 cm. Reversing camera and 360° camera
= Use clean w

ater and a sos cloth to clean the
camera lens.
= Do not use a high-pressure cleaner.
Trailer hitch
= Observe the notes on care in the trailer hitch
manufacturer's operator manual.
= Do not clean the ball neck with a high-pres-
sure cleaner or solvent.
= Remove traces of rust on the ball (e.g. using a
wire brush).
= Remove dirt with a lint-free cloth.
= Aser cleaning, lightly oil or grease the ball
head.
% Before using trailers with anti-torsional cou-
pling, obser

ve the manufacturer's operator
manual. Maintenance and care
357