lock MERCEDES-BENZ B-CLASS HATCHBACK 2021 Service Manual

R
The bonnet is closed.
R The doo rsare closed and loc ked.
R The windo wsand sliding sunroof are closed. #
Start theve hicle using the smartphone.
ATer every engine start, the engine runs for
te n minutes.
Yo u can car ryout a maximum of two consecutive
starting attem pts. You must start the engine with
th eke y before trying tostart theve hicle again
with the smartphone.
Yo u can switch o. theve hicle at any time as fol-
lo ws:
R Viath e Smartphone App
R By pressing theÜ orß button on the
key
% Further information can be found in the
smartphone app.
Secur
Secur ing t
ing the v
he v ehicle ag
ehicle ag ains
ainst st
t star
arting bef
ting bef or
ore car ry-
e car ry-
ing out maint
ing out maint enance or r
enance or repair w
epair wor
ork:
k: #
Switch on the hazard warning light system.
or #
Unlock the doors.
or #
Open a side window or the sliding sunroof. R
R
unning-in not
unning-in not es
es To
preser vethe engine during the /rst 1,500 km:
R Drive at varying road speeds and engine
speeds.
R Do not drive at speeds greater than
140 km/h.
R Drive theve hicle in drive prog ram A
or ;.
R ShiT tothe next highest gear at theve ry latest
when the needle reaches the last third before
th ere d area in there v counter.
R Do not shiT down manual lyin order tobrake.
R Avoid overstraining theve hicle, e.g. driving at
full thro ttle.
R V
V ehicles wit
ehicles wit h aut
h automatic tr
omatic tr ansmission:
ansmission: do not
depress the accelerator pedal be yond the
pressure point (kickdown). R
Only increase the engine speed gradually and
accelerate theve hicle tofull speed aTer
1,500 km.
This also applies when the engine or parts of the
driv etra in ha vebeen replaced.
Please also obser vethefo llowing running-in
no tes:
R In cer tain driving and driving saf ety sy stems,
th e sensors adjust automatically while a cer-
ta in distance is being driven aTer theve hicle
has been deli vered or aTer repairs. Full sys-
te m e.ectiveness is not reached until the end
of this teach-in process.
R Brakepads, brake disks and tyres that are
either new or ha vebeen replaced only achie ve
optimum braking e.ect and grip aTer se veral
hund red kilometres of driving. Compensate for
th ere duced braking e.ect byapplying greater
fo rc eto the brake pedal. 172
172
Driving and parking

N
N
o
ot
tes on dr
es on dr iving
iving &
W
W ARNING
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. #
Stow all objects in theve hicle securely
so that they cannot getinto the driver's
fo ot we ll. #
Always /t the 0oor mats securely and as
prescribed in order toensure that there
is alw ays su1cient room forth e pedals. #
Do not use loose 0oor mats and do not
place 0oor mats on top of one ano ther. &
W
W ARNING
ARNING Risk of accident due toincor-
re ct foot we ar
Incor rect foot we ar includes, forex ample:
R shoes with plat form soles R
shoes with high heels
R slippers
There is a risk of an accident. #
Alwayswe ar suitable foot we ar so that
yo u can operate the pedals safel y. &
W
WARNI NG
ARNI NGRisk of accident if theve hicle is
switched o. while driving
If yo u switch o. theve hicle while driving,
saf ety functions are restric ted or no longer
av ailable.
This may a.ect the po wer steering system and
th e brake forc e boosting, forex ample.
Yo u will need touse considerably more force
to steer and brake, forex ample. #
Do not switch o. theve hicle while driv-
ing. &
D
DAN
AN GER
GER Risk of fatal injuries caused by
ex haust gases
Combustion engines emit poisonous exhaust
ga ses such as carbon monoxide. Inhaling
th ese exhaust gases is hazardous tohealth
and leads topoisoning. #
Never lea vetheve hicle or, if present, the
stationa ryheater running in an enclosed
space without su1cient ventilation. &
W
WARNI NG
ARNI NGRisk of skidding and of an acci-
dent due toshiTing down on slippery road
sur faces
If yo u shiT down on slippery road sur faces to
increase the engine braking e.ect, the drive
wheels may lose traction. #
Do not shiT down on slippery road sur fa-
ces toincrease the engine braking
e.ect. Driving and parking
173
173

#
When leaving theve hicle, alw aysta ke the
ke y with you and lock theve hicle. #
Keep theve hicle key out of there ach of
ch ildren. *
N
NOOTE
TE Damage tothe engine and trans-
mission byshiTing toage ar that is too
low #
When changing between gears 004Band
004C push thege arshiT le verto theright. #
Do not shiT down at high speeds. *
N
NOOTE
TE Damage tothe coupling due to
improper use Holding
theve hicle on inclines with a slipping
coupling can damage it. #
Do not allow the coupling toslip in order
to hold theve hicle on inclines. *
N
NOOTE
TE Damage tothe transmission by
shiTing toreve rsege ar 005E while theve hi-
cle is in motion #
Only shiT into reve rsege ar 005E when the
ve hicle is stationar y. 005E
Reversege ar
0047 -004C
Forw ard gears
005C Neutral #
Eng
Eng aging f
aging f orw
orwar
ard g
d g ear
ear s
s0047 -004C or neutr
or neutr al
al
005C :
:
R Depress the clutch pedal comple tely.
R Turn thege arshiT le verto the desired posi-
tion. 186
186
Driving and parking

#
Eng
Eng aging rev
aging rever
erse g
se g ear
ear 005E:
:
R Depress the clutch pedal comple tely.
R Pull thege arshiT le ver up, push it tothe
leT and then pull it bac k. Gear
Gear
shiT
shiT r
recommendation
ecommendation The
gearshiT recommendation assists you in
adopting an economical driving style. #
When gearshiT recommendation 1appears
on the inst rument displa y,shiT tothere com-
mended gear. A
A
ut
ut omatic tr
omatic tr ansmission
ansmission DIRECT SELECT lev
DIRECT SELECT lev
er
er F
F
unction of t
unction of t he DIRECT SELECT lev
he DIRECT SELECT lev er
er &
W
WARNING
ARNING Risk of accident due toincor-
re ct gearshiTing
If th e engine speed is higher than the idle
speed and you engage the transmission posi-
tion 005Bor005E, theve hicle may accelerate
sharpl y. #
Ifyo u engage the transmission position
005B or005E when theve hicle is at a stand-
still, alw ays depress the brake pedal
/rmly and do not accelerate at the same
time. &
W
WARNING
ARNING Risk of accident and injury due
to leaving children unattended in theve hi-
cle
If ch ildren are leT unattended in theve hicle,
th ey could, in particular:
R open doors, thereby endangering other
persons or road users.
R get out and be struck byoncoming tra1c.
R operate vehicle equipment and become
trapped, forex ample.
In addition, thech ildren could also set the
ve hicle in motion by,fo rex ample:
R releasing the parking brake.
R changing the transmission position.
R starting theve hicle. #
Never lea vechildren unattended in the
ve hicle. #
When leaving theve hicle, alw aysta ke the
ke y with you and lock theve hicle. #
Keep theve hicle key out of there ach of
ch ildren. Driving and parking
187
187

1
Fuel /ller 0ap
2 Brac ketfo r fuel /ller cap
3 Tyre pressure table
4 Fuel type
5 QR code forre scue card #
Press on the back area of fuel /ller 0ap 1.#
Turn the fuel /ller cap anti-clockwise and
re mo veit. #
Insert fuel /ller cap from abo veinto brac ket
2 . #
Comple tely insert the pump nozzle into the
ta nk /ller nec k,hook in place and refuel. #
Only /ll the fuel tank until the pump nozzle
switches o..
% V Vehicles wit ehicles wit h a diesel engine:
h a diesel engine: theta nk /ller
neck is designed forre fuelling at diesel /lling
pumps.
% V
Vehicles wit
ehicles wit h a diesel engine:
h a diesel engine: whenthe fuel
ta nk is comple tely em pty, top up with at least
5 litres of diesel.
% V
V ehicles wit
ehicles wit h a diesel engine:
h a diesel engine: use a /ller neck
with a lar gediame terfo rve hicles with a diesel
engine when topping up fuel from a fuel can.
Otherwise, the /ller neck cannot slide into the
ta nk. #
Replace the cap on the /ller neck and turn
clockwise until it engages audibl y. #
Close fuel /ller 0ap 1. 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
es on r
re/lling
e/lling A
AdBlue
dBlue ®
®
Ad Blue ®
is a water-soluble 0uid forth e NOx
ex haust gas aTertreatment of diesel engines. In
order forth eex haust gas aTertreatment tofunc-
tion proper ly, only use AdBlue ®
in acco rdance
with ISO 22241.
Ad Blue ®
is ch aracterised bythefo llowing:
R non-t oxic
R colourless and odourless
R non-0ammable
If yo u open theAd Blue ®
tank, small amounts of
ammonia vapour may be released. Only /ll the
Ad Blue ®
tank in well-ventilated areas.
Do not let AdBlue ®
come into contact wi thskin,
ey es or clo thes. Keep AdBlue ®
awa y from chil-
dren.
Do not ingest AdBlue ®
. If AdBlue ®
is swallo wed,
immediately rinse your mouth out thoroughl y.
Drink plenty of water. Seek medical at tention at
once. Driving and parking
195 195

Opening t
Opening t
he A
he AdBlue
dBlue ®
®
/ller
/ller cap
cap #
Press on the back area of fuel /ller 0ap 1.#
Turn AdBlue ®
/ller cap 2anti-clockwise and
re mo veit.
% You can also store theAd Blue ®
/ller cap in
th e fuel /ller cap holder in the fuel /ller 0ap
hinge arm. T
T opping up A
opping up A dBlue
dBlue®
®
Mercedes-Benz recommends topping up AdBlue ®
at a /lling pump. If no AdBlue ®
/lling pump is
av ailable, you can also top up AdBlue ®
using a
canister. #
Screw onthefa stener of AdBlue ®
re/ll canis-
te r4. #
Screw disposable hose 3onto the opening
of Ad Blue ®
re/ll canis ter4 until hand-tight. #
Screw disposable hose 3onto the /ller neck
of theve hicle until hand-tight. #
LiT up and tip AdBlue ®
re/ll canis ter4.
The /lling process stops when theAd Blue ®
ta nk is comple tely full.
Ad Blue ®
re/ll canis ter4 can be remo ved
when it has been only partially em ptied. #
Unscr ewand close disposable hose 3and
Ad Blue ®
re/ll canis ter4 inreve rse order. #
Replace AdBlue ®
/ller cap 2and turn it
clo ckwise until it audibly engages. #
Close fuel /ller 0ap 1. #
Switch on theve hicle for at least 60 seconds.
% Ifth eve hicle could not be star ted as the
Ad Blue ®
tank was em pty, it can take up to
60 seconds forth ere /ll tobe de tected. #
Start theve hicle.
% Avoid storing AdBlue ®
re/ll con tainers perma-
nently in theve hicle. Driving and parking
197
197

If
te mp erature monitor 3indicates a malfunc-
tion, it may help toprotect thech arging cable
from direct sunlight.
T T o r
o r ese
ese t t
t the c
he c har
harging cable oper
ging cable oper ating unit:
ating unit:if
saf ety sy stem 4indicates a charging cable mal-
function or a vehicle malfunction, /rst reset the
ch arging cable operating unit. Todo this, discon-
nect thech arging cable from theve hicle and from
th e mains soc ket and waitfor appr oximately /ve
seconds. If the malfunction persists aTer the
ch arging cable is reconnected, charging at the
mains soc ket is not possible. The charging cable
must be replaced or theve hicle plug must be
ch ecked at a quali/ed specialist workshop,
depending on the indicator. F
F
unctions of t
unctions of t he indicat
he indicator lam
or lamps on t
ps on t he v
he vehicle
ehicle
soc ket
soc ket %
Depending on the national version, your vehi-
cle is equipped with one of thefo llowing vehi-
cle soc kets.
The soc ket 0ap is centrally loc ked and unloc ked
to get her with theve hicle. Combo 1
vehicle soc ket
1 Socket lamp
2 Charging process indicator lamp
3 Locking status indicator lamp Combo 2
vehicle soc ket
1 Socket lamp
2 Charging process indicator lamp
3 Locking status indicator lamp
Soc ket lamp 10ashes or lights up as with indi-
cator lamps 2and 3. Driving and parking
205
205

Ov
Ov
er
ervie
vie w of t
w of t he loc
he loc king st
king st atus
atus Loc
Loc
king st
king st a-
a-
tus
tus 3
3 Display
Display Meaning
Meaning
0036 Lights up
whiteVe
hicle
soc ket
unloc ked,
insert or
re mo vecharg-
ing cable
0036 Flashes whiteMalfunction
during locking
or unlocking Ov Ov
er
ervie
vie w of t
w of t he c
he char
harging pr
ging pr ocess st
ocess st atus
atus S
S
t
tatus of t
atus of t he
he
c
c har
har ging
ging
pr
pr ocess
ocess 2
2 Displ
ay
Display Meaning
Meaning
003D Flashes
orangeConnection is
being estab-
lished
003D Flashesgreen Active energy
0ow S S
t
tatus of t
atus of t he
he
c
c har
har ging
ging
pr
pr ocess
ocess 2
2 Display
Display
Meaning
Meaning
003D Lights up
orangeInter
ruption in
ch arging
003D Lights up
green Charging
process com-
ple
ted
003D Flashesred
(for appr ox.
90 s) Ve
hicle mal-
function;
ch arging is
not possible S S
t
tar
ar ting t
ting t he alt
he alt er
ernating curr
nating curr ent c
ent c har
harging pr
ging pr ocess
ocess
(mode 2/3)
(mode 2/3) &
D
DAN
AN GER
GER Risk of death when charging at a
damaged soc ket
The charging process uses high voltage. If
th ech arging cable, theve hicle soc ket or the
mains soc ket are damaged, you could receive
an elect ric shoc k. #
Only use an undamaged charging cable. #
Avoid mechanical damage such as crush-
ing, abrading or driving overth e cable. #
Have a damaged vehicle soc ketre placed
at a quali/ed specialist workshop as
soon as possible. #
Never connect thech arging cable to a
damaged vehicle soc ket. *
N
NOOTE
TE Damage due toove rheating of
ch arging cable and charging cable con-
nector During
thech arging process, thech arging
cable and charging cable connector can heat
up within their permissible limit values. 206
206
Driving and parking

The
003D indicator lamp 4and status dis-
play 30ash orange and, as soon as the high-
vo ltage battery is charge d, green.
When thech arging cable is connected totheve hi-
cle, theve hicle cann otbe star ted or mo ved.
At the start of thech arging process, thech arge
le ve l display is shown in the Instrument Display
with a charging prediction. The charging predic-
tion either refers to the predicted charge leve l at
th e set departure time, or the time at which the
high- voltage battery will be fully charge d.
% Depending on thete mp erature, thefa n and
bat tery cooling system may audibly switch on
during thech arging process.
% Ifth eve hicle is idle for lengt hyperiods and
connected tothe mains suppl y,the high-volt-
age battery will be rech arge d automatically as
needed or when electrical consumers are
activated (e.g. the pre-entry climate control).
% The vehicle is equipped with an elect rical fuse
which pr otects it against overvoltage in the
mains suppl y.This electrical fuse may trip dur-
ing se vere thunderstorms, forex ample, and
may cause the fuse in the building totrip or may inter
rupt thech arging process. These
functions pr otect theve hicle.
ATer the fuse in the building is switched on
again, thech arging process resumes automat-
icall y.Fo llowing an inter ruption in the po wer
supply without the fuse in the building being
tripped, it may take up to te n minutes for
ch arging toresume automaticall y. Ending t
Ending t
he alt
he alter
ernating curr
nating curr ent c
ent char
harging pr
ging pr ocess
ocess
(mode 2/3)
(mode 2/3) R
R
eq
eq uir
uir ements:
ements:
R The dis tance between theke y and theve hicle
does not exceed 1 m. Combo 1 v
Combo 1 v ehicle socket
ehicle soc ket #
Press charging inter ruption button 3.
or #
Unlock theve hicle.
The charging process is ended. The 0036indi-
cator lamp 1lights up white. The vehicle
soc ket is unloc ked. Driving and parking
209
209

%
Vehicles equipped with a type 1 vehicle
soc ketfo rAC charging ha veno charging inter-
ru ption button 3. #
Press and hold button 2onthech arging
cable connector and remo vethech arging
cable connector from theve hicle soc ket.
% Ifyo u cannot remo vethech arging cable con-
nector, repeat the unlocking procedure. If the
ch arging cable connector is still loc ked, con-
ta ct a quali/ed specialist workshop. #
Close the soc ket co ver and the soc ket 0ap. #
Remo vethech arging cable connector from
th e mains soc ket, or from the soc ket on the
wa llbox/charging station, and st owtheve hi-
cle's charging cable safely in theve hicle
(/ page 198). Combo 2 v Combo 2 v
ehicle socket
ehicle soc ket #
Press charging inter ruption button 2.
or #
Unlock theve hicle.
The charging process is ended. The 0036indi-
cator lamp 1lights up white. The vehicle
soc ket is unloc ked. %
Vehicles only equipped with a type 2 vehicle
soc ketfo rAC charging ha veno charging inter-
ru ption button 2. #
Remo vethech arging cable connector from
th eve hicle soc ket within 30 seconds.
ATer the 30 seconds ha veelapsed, theve hicle
soc ket will be loc ked again.
% Ifyo u cannot remo vethech arging cable con-
nector, repeat the unlocking procedure. If the
ch arging cable connector is still loc ked, con-
ta ct a quali/ed specialist workshop. #
Close the soc ket co ver and the soc ket 0ap. #
Remo vethech arging cable connector from
th e mains soc ket, or from the soc ket on the
wa llbox/charging station, and st owtheve hi-
cle's charging cable safely in theve hicle
(/ page 198).
% ATer thech arging cable connector has been
disconnected, the0036 indicator lamp 1on
th eve hicle soc ketre mains lit for some time
before switching o.. 210 210
Driving and parking