ABS MERCEDES-BENZ B-CLASS HATCHBACK 2021 Owners Manual

1
0025 ABS →
491
2 003E003D Turn signal lights →
140
3 0077 Tyre pressure monitoring system →
493
4 003D Electrical fault →
484
5 L Distance warning →
490
6 004D Brakes (yellow) →
488
7 004D Brakes (red) →
488
8 0024 Electric parking brake (yellow) →
488
9 0024 Electric parking brake (red) →
488
A 00B9 Engine diagnostics →
484
B 0028 Diesel engine: preglow
C 005A Indicator lamp inoperative
D 005E Rear fog light →
139 E
0057 High beam →
140
0058 Low beam →
138
0060 Standing lights →
138
F 00BB ESP®
OFF →
491
00E5 ESP®
→
491
G 0075 Restraint system →
480
H Fuel le vel →
281
I 00D4 Reser vefuel wi thfuel /ller 0ap location
indicator →
484
J Ù Powe r steering →
483
K 00E9 Seat belt →
480
L ï Trailer hitch →
483 At
a glance – Indicator and warning lamps (standard)
13
13

1
003E003D Turn signal lights →
140
2 ï Trailer hitch →
483
3 0075 Restraint system →
480
4 00BB ESP®
OFF →
491
00E5 ESP®
→
491
5 005E Rear fog light →
139
6 0057 High beam →
140
0058 Low beam →
138
0060 Standing lights →
138
7 005A Indicator lamp inoperative
8 ÿ Coolant temp erature →
484
9 Coolant temp erature display →
281
A 0024 Electric parking brake (yellow) →
488
B 004D Brakes (yellow) →
488 C
003D Electrical fault →
484
D L Distance warning →
490
E 0025 ABS →
491
F Ù Powe r steering →
483
G 0077 Tyre pressure monitoring system →
493
H 0028 Diesel engine: preglow
I 00D4 Reser vefuel wi thfuel /ller 0ap location
indicator →
484
J Fuel le vel →
281
K 0024 Electric parking brake (red) →
488
L 00E9 Seat belt →
480
M 004D Brakes (red) →
488
N 00B9 Engine diagnostics →
484
O ä Indicator lamp inoperative At
a glance – Indicator and warning lamps (widescreen cockpit)
15
15

*
N
NO
OTE
TE Damage totheve hicle due todriv-
ing toofast and due toimpacts tothe
ve hicle underbody or suspension compo-
nents In
thefo llowing situations, in particular, there
is a risk of damage totheve hicle:
R theve hicle becomes grounded, e.g. on a
high kerb or an unpa vedro ad
R theve hicle is driven toofast ove r an obsta-
cle, e.g. a kerb, speed bump or po thole
R a heavy object st rike sth e underbody or
suspension components
In situations such as these, damage tothe
body, underbody, suspension components,
wheels or tyres may not be visible. Compo-
nents damaged in this wa y can un expectedly
fa il or, in the case of an accident, may no lon-
ge r absorb there sulting forc e as intended.
If th e underbody panelling is damaged, 0am-
mable materials such as lea ves, grass or twigs
can collect between the underbody and the
underbody panelling. These materials may ignite if
they come into contact with hot parts
of theex haust system. #
Have theve hicle checked and repaired
immediately at a quali/ed specialist
wo rkshop.
or #
If driving saf ety is impaired while con-
tinuing your journe y,pull over and stop
th eve hicle immediatel y,while paying
attention toroad and tra1c conditions,
and contact a quali/ed specialist work-
shop. Plug-in h Plug-in h
ybr
ybr id
id
Hybrid vehicles ha vea combustion engine and an
elect ric mo tor.The energy supply for operating
th eve hicle elect rically is pr ovided bythe high-
vo ltage on-board electrical system. &
D
DAN
AN GER
GER Risk of death and /re due to
modi/ed and/or damaged components of
th e high-voltage on-board electrical sys-
tem
The vehicle's high- voltage on-board electrical
system is under high voltage. If you modify
component parts in theve hicle's high- voltage
on-board electrical system or touch damaged
component parts, you may be electrocuted. In
addition, modi/ed and/or damaged compo-
nents may cause a /re.
In theeve nt of an accident or impact tothe
ve hicle underbod y,components of the high-
vo ltage electrical system may be damaged
although the damage is not visible. #
Never make any modi/cations tothe
high- voltage on-board electrical system. #
Do not switch on or use theve hicle if its
high- voltage on-board electrical system
components ha vebeen modi/ed or dam-
aged. 28 28
General no
tes

T
T
ec
ec hnology Fr
hnology Freq
eq uency r
uency r angeT r
ang eT ransmission output/magne
ansmission output/magne tic
tic/eld
/eld s
strtr eng th
ength
UMTS (Band I, III, VIII)+ 24 dBm (+1/-3 dB)
LT E (Band 1, 3, 7, 8, 20, 28) +23 dBm (±2 dB)
RAMSES (Router And Mobile SErviceS )GSM (E-GSM 850 / E-GSM 900, Class 4)
GSM (E-GSM 1800 / E-GSM 1900, Class 4) < +32.5 dBm (±1 dB)
< +29.5 dBm (±1 dB)
UMTS (WCDMA FDD I, II, III, IV, V,VIII, XIX, Class
3) < +23.5 dBm (±1 dB)
LT E (FDD B1, B2, B3, B4, B5, B7, B8, B9, B18,
B19, B21, B28, Class 3) < +23 dBm (±1 dB)
LT E (TDD B38, B40, B41, Class 3) < +23 dBm (±1 dB)
GNSS (1559–1610 MHz )R eceiving onlyInf Inf
or
ormation about t
mation about t he
hespeci/c
speci/c absorp
absorption r
tion rate
ate
Fo rFr ance onl y: The
values weredeterm ined and tested in acco rd-
ance with the Décr etn° 2019-1186 guideline re
ga rding the indication of the speci/c absor ption
ra te (SAR) of wireless vehicle components. 34 34
Gene
ral no tes

Inf
Inf
or
ormation about t
mation about t he
hespeci/c
speci/c absorp
absorption r
tion r ate
ate V
V
ehicle com
ehicle com ponent (designation in
ponent (designation in
accor
accor dance wit
dance wit h EU DoC)
h EU DoC) S
S
AR v
AR v alue in W/kg
alue in W/kg Applicable limit v
Applicable limit value
alue
Ra dio data transmission telephone system 0.24 W/kg 2 W/kg
Hermes 2.1 < 0.4 W/kg2 W/kg
Compensator ECE DE003 & ECE DE004 < 0.2 W/kg 2 W/kg
DA I RS E1 .8 W/kg 2 W/kg
Ta blet PC SM-T230NZ 0.7 W/kg4 W/kg
NRCS2P 0.003 W/kg2 W/kg
NTG7RSU 0.07 W/kg2 W/kg
NTG7 MID, NTG7 HIGH, NTG7 PREMIUM,
NTG7 PREMIUMP LUS, NTG7 MID LFT2,
NTG7 HIGH LFT2, NTG7 PREMIUM LFT2,
NTG7 PREMIUMP LUS LFT2 0.08 W/kg
2 W/kg General no
tes
35 35

#
Guide TopTe ther belt 4under head restraint
1 between the two head restraint ba rs. #
Hook TopTe ther hook 3into TopTe ther
anchorage 2without twisting. #
Tension TopTe ther belt 4. In doing so, com-
ply with thech ild restraint system manufactu r-
er&#39;s installation inst ructions. #
If necessar y,slide head restraint 1down-
wa rds (/ page 112). Make sure that you do
not inter fere with the cor rect routing of To p
Te ther belt 4. Secur
Secur
ing t
ing the c
he child r
hild r es
estrtraint syst
aint syst em wit
em with t
h the seat
he seat
belt
belt N
No
ot
tes on t
es on t he suit
he suitability of seats f
ability of seats f or att
or attac
aching belt-
hing belt-
secur
secur ed c
ed child r
hild r es
estrtraint syst
aint syst ems
ems
R
R ear seats
ear seats
W
W eight cat
eight cat egor
egory 0: up t
y 0: up t o 10 kg
o 10 kg
LeT/ right rear seat U, L
Centre rear seat 1
U, L
W W eight cat eight cat egor
egory 0+: up t
y 0+: up t o 13 k
o 13 kgg
LeT/right rear seat U, L
Centre rear seat 1
U, L
W
W eight cat
eight cat egor
egory I: 9 t
y I: 9 t o 18 kg
o 18 kg
LeT/right rear seat U, L
Centre rear seat 1
U, L
W
W eight cat
eight cat egor
egory II: 15 t
y II: 15 t o 25 k
o 25 kgg
LeT/right rear seat U, L Centre
rear seat 1
U, L
W
W eight cat
eight cat egor
egory III: 22 t
y III: 22 t o 36 kg
o 36 kg
LeT/right rear seat U, L
Centre rear seat 1
U, L
1 Child restraint systems wi th a supporting brac ket are
not suitable forth is seat.
U Suitable forch ild restraint systems of the &#34;Universal&#34;
category in this we ight categor y.
L Suitable for semi-universal child restraint systems
acco rding totheta ble in &#34;Recommended child restraint
systems&#34;, or if theve hicle and the seat are listed in the
ch ild restraint system manufacturer&#39;s vehicle model list. N
No
ot
tes on c
es on c hild r
hild res
estrtraint syst
aint syst ems on t
ems on t he fr
he front
ont
passeng
passeng er seat
er seat
R If it is absolutely necessary foryo uto /t a
ch ild restraint system tothe front passenger
seat, be sure toobser vethe information on
ch ild restraint systems on the front passenger
seat (/ page 77). Occupant saf
ety
73
73

Wa
rning notice on the front passenger sun visor
Alw ays obser vethe status of the front passenger
airbag on thePA SSENGER AIR BAG OFF indicator
la mp:
R If it is absolu tely necessary to/t a child
re straint system tothe front passenger seat,
alw ays obser vethe information on automatic
front passenger airbag shuto. (/ page 55).
R When using a rear wa rd-facing child restraint
system on the front passenger seat, the front
passenger airbag must alw ays be disabled.
This is only the case if thePA SSENGER AIR
BAG OFF indicator la mpis lit continuously
(/ page 57). R
Ifth ePA SSENGER AIR BAG OFF indicator
la mp is o., the front passenger airbag is ena-
bled. The front passenger airbag may deploy
during an accident.
Secur
Secur ing t ing the c
he child r
hild r es
estrtraint syst
aint syst em wit
em with t
h the seat
he seat
belt on t
belt on t he fr
he front passeng
ont passeng er seat
er seat
When /tting a belt-secured child restraint system
on the front passenger seat, alw ays obser vethe
fo llowing:
0073 Obser vethe no tes on rear wa rd-facing and
fo rw ard-facing child restraint systems on the
front passenger seat (/ page 76).
0073 Obser vethech ild restraint system manufac-
tu re r&#39;s installation and operating inst ructions.
0073 For a child restraint system in the &#34;Universal&#34;
or &#34;Semi-Universal&#34; categor y,make sure that
th e system has been appr ovedfo rth eve hicle
seat.
Obser vethe no tes under &#34;Suitability of seats
fo r attaching belt-secured child restraint sys-
te ms&#34; (/ page 73). 0073
When using a forw ard-facing child restraint
system in weight category I: remo vethe head
re straint from there specti veseat, if possible.
ATer thech ild restraint system has been
re mo ved, replace the head restraint immedi-
atel y and adjust all head restraints co rrectl y.
0073 The backrest of thefo rw ard-facing child
re straint system must, as far as possible, be
re sting on the seat backrest of the front
passenger seat.
0073 Ifth e head restraint of thech ild seat cannot
be fully extended when it is installed in the
ve hicle, this will result in restrictions on the
maximum size setting forch ild restraint sys-
te ms in weight category II or III.
Contact with thero of when the head
re straint is ful lyex tended and loc ked in place
will not result in any restrictions on use.
0073 Thechild restraint system must not be put
under strain between thero of and the seat
cushion and/or be /t tedfacing the wrong
direction. Occupant saf
ety
77 77

#
Forch arging stations without a preinstal-
led charging cable:
R For saf etyre asons, only use charging
cables that ha vebeen tested and
appro vedby the manufacturer for
ch arging the high-voltage battery in
an electric vehicle.
R Never use damaged charging cables.
R Do not extend thech arging cable.
R Do not use adap ters. #
Make sure toobser vethe saf ety in form a-
tion on thech arging station. Most
charging stations must be activated before
th ech arging process, e.g. using an RFID card.
Obser vethe on-site operator&#39;s inst ructions forthe
ch arging station.
The amount of ene rgy dispensed forth ech arging
process, shown bythech arging station, may be
higher than the amount of energy actually absor-
bed bythe high-voltage batter y.This is there sult
of di.erent le vels of charging losses and is descri-
bed as rech arge e1ciency. Charging losses occur,
fo rex ample, due toheat that builds up when ch
arging or from auxiliary consumers that are
switched on. Further information on rech arge e1-
ciency can be obtained at a quali/ed specialist
wo rkshop. N
No
ot
tes on c
es on c har
harging t
ging t he high-v
he high-v olt
oltag
age batt
e batt er
ery at a
y at a
f
f as
ast c t c har
har ging st
ging st ation (mode 4)
ation (mode 4) &
D
DAN
AN GER
GER Risk of fatal injuries due todam-
aged components
Connecting thech arging cable toach arging
station using a damaged component part
could cause a /re or an elect ric shoc k,for
ex ample. #
Forch arging stations with a preinstalled
ch arging cable:
R Perform a visual check of thech arg-
ing station for obvious faults, such as
massive damage tothe housing or
ch arging cable. #
Forch arging stations without a preinstal-
led charging cable:
R For saf etyre asons, only use charging
cables that ha vebeen tested and appro
vedby the manufacturer for
ch arging the high-voltage battery in
an electric vehicle.
R Never use damaged charging cables.
R Do not extend thech arging cable.
R Do not use adap ters. #
Make sure toobser vethe saf ety in form a-
tion on thech arging station. Most
charging stations must be activated before
th ech arging process, e.g. using an RFID card.
Obser vethe on-site operator&#39;s inst ructions forthe
ch arging station.
The charging cable forth eve hicle must not be
lon gerth an 30 m due tothe legal requ irements in
some countries. This is toprev ent the inter fer-
ence of signals being received byradio communi-
cation devices in theve hicle or in close pr oximity
to thech arging station. Be awarethat parts of the
ch arging cable may be routed under ground. If in
doubt, ask thech arging station operator if this is
th e case before charging the high-voltage batter y.
The amount of energy dispensed forth ech arging
process, shown bythech arging station, may be 202
202
Driving and parking

higher
than the amount of energy actually absor-
bed bythe high-voltage batter y.This is there sult
of di.erent le vels of charging losses and is descri-
bed as rech arge e1ciency. Charging losses occur,
fo rex ample, due toheat that builds up when
ch arging or from auxiliary consumers that are
switched on. Further information on rech arge e1-
ciency can be obtained at a quali/ed specialist
wo rkshop. Se
Se
tting t
tting t he maximum per
he maximum per missible c
missible c har
harging cur-
ging cur-
r
r ent f
ent f or c
or char
harging at a mains soc ket
ging at a mains soc ket *
N
NO
OTE
TE Overloading the mains soc ket due
to excessive charging cur rent If
th ech arging cur rent is too high, the fuse
could be tripped or theex tern al mains supply
could overheat. #
Make sure that theex tern al mains supply
has been designed tohandle the set
ch arging cur rent. #
If necessar y,reduce the set charging
cur rent or use a di.erent mains soc ket. #
For saf etyre asons, only use thech arging
cable supplied with theve hicle or an
original Mercedes-Benz charging cable.
Mercedes-Benz thoroughly tests these
original charging cables forth eir suitabil-
ity for high-voltage charging of your vehi-
cle. Pur chase these parts at a Mercedes-
Benz Service Centre and obtain advice
th ere. #
Check the setting of the maximum
ch arge cur rent using thech arging capa-
city shown in the Instrument Displa y. Before
charging at a mains soc ket, ha vethe maxi-
mum permissible charging cur rent forth ere leva nt
mains soc ket or the building inspected byaqu ali-
/ed elect rician. The charging cable supplied is set
to a countr y-speci/c maximum charging cur rent
va lue. When charging abroad, the maximum value
may exceed the permitted value forth at countr y.
When abroad, obser vethe count ry-speci/c la ws
when charging. If you ha vequestions concerning
setting thech arging cur rent or if there is a mal-
function, please contact a quali/ed specialist
wo rkshop. #
Set the maximum permissible charging cur-
re nt in the multimedia system menu
(/ page 301).
If th eex act value of the maximum permissible
ch arging cur rent cannot be set, select the next
smaller adjustable value.
% Ifth eve hicle requ ires more time than usual to
ch arge the high-voltage batter y,ch eck the
maximum charging cur rent settings in the
multimedia system menu. Ov Ov
er
er vie
vie w of t
w of t he c
he char
harging cable contr
ging cable contr ol panel
ol panel The
charging cable cont rol panel sho ws the cur-
re nt status of thech arging process. Driving and parking
203
203

not be co
vered and the de tection ranges around
th em must be kept free. Do not at tach additional
licence plate brac kets, advertisements, stic kers,
fo ils or foils toprotect against stone chippings in
th e de tection range of the sensors and cameras.
Make sure that there are no overhanging loads
pr otru ding into the de tection range.
If th ere is damage toa bumper or thera diator
gr ille, or aTer an impact, ha vethe function of the
senso rschecked at a quali/ed specialist work-
shop. Ha vedamage or stone chipping in the area
of the cameras on the front and rear wind ows
re paired at a quali/ed specialist workshop. Ov
Ov
er
ervie
vie w of dr
w of dr iving syst
iving syst ems and dr
ems and dr iving safe
iving safety
ty
syst
syst ems
ems R
ABS (A Anti-lock B Braking S System) (/ page 225)
R BAS (BBra ke AAssist S System) (/ page 225)
R ESP ®
(EElectronic S Stability P Program)
(/ page 225)
R ESP ®
Crosswind Assist (/ page 226)
R ESP ®
trailer stabilisation (/ page 227)R
EBD (E Electronic B Brakeforc e DDistribution)
(/ page 227)
R STEER CONTROL (/ page 227)
R HOLD function (/ page 228)
R Hill Start Assist (/ page 229)
R Adaptive Brake Lights (/ page 229)
R Start-o. assist (/ page 230)
R ATTENTION ASSIST (/ page 230)
R Cruise cont rol (/ page 232)
R Limiter (/ page 232)
R Tra1c Sign Assist (/ page 250)
R Speed Limit Assist (countr y-dependent)
(/ page 249)
R Suspension with adaptive damping adjustment
(/ page 257)
Dr
Dr iving Assist iving Assist ance pack
ance package
age
The following functions are part of the Driving
Assistance Package. Cer tain functions are only
av ailable in some countries. Some functions are
also available without the Driving Assistance
Pa ckage, albeit with restric ted functionality. R
Active Distance Assist DISTRONIC
(/ page 235)
R Active Speed Limit Assist (countr y-dependent)
(/ page 239)
R Route-based speed adap tation (countr y-
dependent) (/ page 240)
R Active Brake Assist (/ page 244)
R Active Steering Assist (countr y-dependent)
(/ page 241)
R Active Emer gency Stop Assist (countr y-
dependent) (/ page 243)
R Blind Spot Assist and Active Blind Spot Assist
with exitwa rning (/ page 252)
R Active Lane Keeping Assist (/ page 255)
P
P ar
ar king P
king P ack
ackage
age
R Reversing camera (/ page 258)
R 360° Camera (/ page 260)
R Parking Assist PARKTRONIC (/ page 264)
R Active Parking Assist (/ page 268)224
224
Driving and parking