2021 MERCEDES-BENZ B-CLASS HATCHBACK tow

Po
tential pr otection pr ovided byeach airbag:
R Knee airbag: thigh, knee and lo wer leg
R Driver's airbag, front passenger airbag: head
and ribcage
R Window airbag: head
R Side airbag: ribcage and pelvis &
W
WARNING
ARNING Risk of inju ryor death if the co-
driver airbag is enabled
If th e co-driver airbag is enabled, a child on
th e co-driver seat may be struck bythe co-
driver airbag during an accident.
NEVER use a rear wa rd-facing child restraint
system on a seat wi than ENABLED FRONT
AIR BAG; DEATH or SERIOUS INJURY tothe
CHILD ca n occur. When /tting a
child restraint system tothe front
passenger seat, obser vetheve hicle-speci/c infor-
mation (/ page 77). Also, alw ays obser vethe
no tes on rear wa rd-facing or forw ard-facing child
re straint systems on the front passenger seat
(/ page 76). Inf
Inf or ormation on aut
mation on aut omatic fr
omatic front passeng
ont passeng er airbag
er airbag
shut
shut o.
o.
The front passenger airbag can only be deplo yed
in an accident if thePA SSENGER AIR BAG OFF
indicator la mpis o.. If the front passenger seat is
occupied, make sure, bo thbefore and during the
journe y,that the status of the front passenger air-
bag is cor rect (/ page 57).
* NO
NO TE
TEDeployment of components of the
re straint system when the front passenger
seat is unoccupied In an accident,
the components of the
re straint system ma y deployunnecessarily on
th e front passenger side if:
R There are heavy objects on the front
passenger seat.
R The seat belt tongue is engaged in the seat
belt buckle of the front passenger seat and
th e front passenger seat is unoccupied. #
Stow objects in a suitable place. #
Only one person should use each seat
belt at any one time. Depending on
the de tected accident situation, the
wind owairbag on the front passenger side may
deplo y.The airbag is deplo yedre ga rdless of
whe ther the front passenger seat is occupied. Pr
ot
Pr otection pro
ection pro vided b
vided by t
y the airbags
he airbags Depending on
the accident situation, an airbag
may supplement the pr otection o.ered bya cor-
re ctly fastened seat belt. &
W
WARNING
ARNING Risk of injur y or death due to
an inco rrect seat position
If yo u deviate from the cor rect seat position,
th e airbag cannot per form its intended pr otec-
tive function.
Each vehicle occupant must make sure of the
fo llowing:
R Fasten seat belts co rrectl y.Pregnant
wo men must take particular care toensure
th at the lap belt ne ver lies across the
abdomen. Occupant saf
ety
53 53

The installation location of an airbag is identi/ed
by the AIRB AGsymbol (/ page 52).
Objects in the deployment area of an airbag may
pr ev ent the airbag from functioning cor rectl y. &
W
WARNI NG
ARNI NGRisk of injury from objects in
th e deployment area of an airbag
Objects in the deployment area of an airbag
can hinder or pr event the cor rect deployment
of the airbag.
The airbag may then deploy in an uncontrolled
manner and may even cause additional inju-
ri es totheve hicle occupants bydeploying.
This may be the case in particular if the airbag
is integ rated into the seat. #
Always st owand secure objects cor-
re ctl y. #
Before commencing your journe y,make
sure that no objects are st owed in the
deployment area of an airbag. &
W
WARNING
ARNING Risk of inju ryor death due to
th e use of unsuitable seat co vers
Due tounsuitable seat co vers,th e airbags
cannot pr otect vehicle occupants as intended.
In addition, the operation of the automatic
front passenger airbag shuto. could be
re stric ted. #
You should only use seat co vers that
ha ve been appr oved forth e cor respond-
ing seats byMercedes-Benz. &
W WARNI NG
ARNI NGRisk of injury due tomalfunc-
tioning sensors in the door
The function of the airbags can be impaired
due tomodi/cations or incor rect wo rkper-
fo rm ed on the doors or door trim, or if the
doors are damaged. #
Never modify the doors or parts of the
doors. #
Always ha veworkon the doors or door
trim car ried out at a quali/ed specialist
wo rkshop. &
W
WARNING
ARNING Risk of injury due todeplo yed
airbag
A depl oyed airbag no longer o.ers any pr otec-
tion. #
Have theve hicle towe dto a quali/ed
specialist workshop in order tohave the
deplo yed airbag replaced. Ha
ve deplo yed airbags replaced immediatel y. S
S
t
tatus of t
atus of t he fr
he front passeng
ont passeng er fr
er front airbag
ont airbag F
F
unction of t
unction of t he aut
he automatic fr
omatic fr ont passeng
ont passeng er airbag
er airbag
shut
shut o.
o.
The automatic front passen ger airbag shuto. is
able todetect whe ther the front passenger seat is
occupied bya person or a child restraint system.
The front passenger airbag is enabled or disabled
acco rdingl y. Occupant saf
ety
55 55

*
N
NO
OTE
TE Damage caused byobjects in the
fo ot we ll or behind the seat The automatic adjustment of
the seat position
may result in damage tothe seat and/or the
object. #
Stow objects in a suitable place. R
R
e
ev
ver
er sing t
sing t he PRE-S
he PRE-S AFE
AFE®
®
syst
syst em measur
em measur es
es If an accident did not occur,
the pre-em ptive
measures that we re ta ken are reve rsed.
Yo u will need toper form certain settings yourself. #
Ifth e seat belt pre-tensioning is not reduced,
mo vethe seat backrest back slightl y.
The locking mechanism releases. F
F
unction of PRE-S
unction of PRE-S AFE
AFE ®
®
PL
PL US (anticipat
US (anticipat or
ory occu-
y occu-
pant pr ot
pant pr otection plus)
ection plus) PRE-SAFE
®
PLUS can de tect cer tain impacts, par-
ticular lyan imminent rear impact, and take pre-
em ptive measures toprotect theve hicle occu- pants. These measures cann
otnecessarily pre-
ve nt an imminent impact.
PRE-SAFE ®
PLUS can implement thefo llowing
measures independently of each other:
R Tightening the seat belts on the driver's seat
and front passenger seat.
R Activating there ar hazard warning lights at a
higher 0ashing frequency.
R Increasing brake pressure when theve hicle is
stationar y.This brake application is cancelled
automatically when theve hicle pulls away.
If an accident did not occur, the pre-em ptive
measures that we re ta ken are reve rsed.
Syst
Syst em limits
em limits
The system will not initiate any action in thefo l-
lowing situations:
R when reve rsing
or
R when theve hicle is towing a trailer and there
is a risk of a rear impact The system will not initiate any braking application
in thefo llowing situations:
R whilst driving
or
R when entering or exiting a parking space while
using Active Parking Assist A A
ut
ut omatic measur
omatic measur es
esaTer
aTer an accident
an accident
Depending on the type and se verity of the acci-
dent, and depending on theve hicle's equipment,
th efo llowing measures can be implemented, for
ex ample:
R automatic braking (post-collision brake)
R activating the hazard warning lights
R triggering an automatic emer gency call
(/ page 325)
R switching o. the engine
To start theve hicle again, switch theve hicle
o. and on once more (/ page 169). Depend-
ing on the type and se verity of the accident,
yo u may no longer be able tostart theve hicle.
R switching o. the fuel supply 60
60
Occupant saf
ety

In
thefo llowing situations, there is a danger of
being loc ked out when the function is activated:
R while theve hicle is being tow- star ted or
pushed
R ifth eve hicle is being tested on a roller dyna-
mome ter Loc
Loc
king/unloc
king/unloc king t
king the v
he vehicle wit
ehicle wit h t
h the emer-
he emer-
g
g ency key
ency key Loc
Loc
king/unloc
king/unloc king t
king the dr
he driv
iver's door wit
er's door wit h t
h the
he
emerg
emerg encykey
ency key
% Ifyo u wish tolock theve hicle entirely using
th e emer gency key,/rst press the button for
locking from the inside while the driver's door
is open. Then proceed tolock the driver's
door using the emer gency key. #
Remo vethe emer gency key (/ page 83). #
Inse rtthe emer gency key as far as it will go
into opening 1inthe co ver. #
Pull and hold the door handle. #
Pull the co ver on the emer gency key as
straight as possible away from theve hicle until
it re leases. #
Release the door handle. #
T To unloc o unloc k:
k:turn the emer gency key anti-cloc k-
wise toposition 0047. #
T
To loc
o loc k:
k:turn the emer gency key clockwise to
position 0047. #
Carefully press the co ver onto the lock cylin-
der until it engages and is seated /rml y.88
88
Opening and closing

V
V
ehicles wit
ehicles wit h KEYLESS-GO
h KEYLESS-GO #
Press locking button 2ontheta ilgate.
If a key is de tected outside theve hicle, the
ta ilgate will close and theve hicle will be
loc ked. #
Press and hold the008B button on thekey.
The key must be in the vicinity of theve hicle.
V
V ehicles wit
ehicles wit h HANDS-FREE A
h HANDS-FREE A CCESS
CCESS#
Make a kicking mo vement with your foot
below the bumper (/ page 92).
A
A ut
ut omatic rev
omatic rever
ersing function f
sing function f or t
or the t
he t ailg
ailgate
ate
The tailgate is equipped with automatic bloc kage
de tection with a reve rsing function. If an obstacle
obstructs theta ilgate during the automatic closing
process, it will automatically open again slightl y.
Au tomatic bloc kage detection with there ve rsing
function is only an aid and is not a substitute for
yo ur attentiveness. #
During the closing process, make sure that no
body parts are in the closing area. &
W
WARNING
ARNING Risk of becoming trapped
despite reve rsing function
The reve rsing function will not react:
R tosoT, light and thin objects, e.g. /n gers
R towa rdsth e end of the closing procedure
In these situations in particular, there ve rsing
function cannot pr event someone being trap-
ped. #
Ensure that no body parts are in the
closing area.
If someone is trapped, either: R Press the008B button on thekey.
R Press or pull there mo teoperating switch
on the driver's door.
R Press the closing or locking button on the
ta ilgate.
R Pull theta ilgate handle. HANDS-FREE A
HANDS-FREE A
CCESS function
CCESS function Wi
th HANDS-FREE ACCESS you can open, close
or stop the closing process of theta ilgate byper-
fo rm ing a kicking mo vement under there ar
bumper.
The kicking mo vement triggers the opening or
closing process alternatel y.92 92
Opening and closing

Obser
vethe no tes when opening (/ page 89)
and closing (/ page 90)theta ilgate.
% Twowa rning tones sound when theta ilgate is
opening or closing. &
W WARNING ARNING Risk of burns caused bya hot
ex haust system
The vehicle exhaust system can become very
hot. If you use HANDS-FREE ACCESS, you
could burn yourself bytouching theex haust
system. #
Always ensu rethat you only make a kic k-
ing mo vement within the de tection range
of the sensors. *
N
NO OTE
TE Vehicle damage due touninten-
tional opening of theta ilgate R
when using an automatic car wash
R when using a high pressure cleaner #
Deactivate the function of theke y in
th ese situations.
or #
Make sure that theke y is at a minimum
dis tance of 3 m away from theve hicle. When making
the kicking mo vement, make sure
th at you are standing /rmly on thegr ound. Yo u
could otherwise lose your balance, e.g. on ice.
Obser vethefo llowing no tes:
R The key is behind theve hicle.
R Stand at least 30 cm away from theve hicle
while per form ing the kicking mo vement.
R Do not come into contact with the bumper
while making the kicking mo vement.
R Do not car ryout the kicking mo vement too
slo wly.
R The kicking mo vement must be towa rdsthe
ve hicle and back again. 1
Detection range of the sensors
If se veral consecutive kicking mo vements are not
successful, waitte n seconds.
Syst
Syst em limits
em limits
The system may be impai red or may not function
in thefo llowing cases:
R The sensors are dirty, e.g. due toroad salt or
sno w.
R The kicking mo vement is made using a pros-
th etic leg. Opening and closing
93
93

1
Raise
2 Open
3 Close/lo wer
Use the0057 button tooperate the panorama
sliding sunroof and thero ller sunblind.
The panorama sliding sunroof can be operated
only when thero ller sunblind is open. #
Check whe ther the sliding sunroof can be
ra ised or opened when a roof luggage rack is
/t ted. #
T
T o st o st ar
art aut
t aut omatic oper
omatic oper ation:
ation:pressthe0057
button be yond the point of resis tance or pull
and release it. #
T
T o int
o int err
errup
upt aut
t aut omatic oper
omatic oper ation:
ation:brie0y press
th e0057 button in any direction.
The opening/closing process will be stopped.
A
A ut
ut omatic rev
omatic rever
ersing function of t
sing function of t he sliding sun-
he sliding sun-
r
r oof
oof
If an obstacle obstructs the sliding sunroof during
th e closing process, the sliding sunroof will open
again automaticall y.The automatic reve rsing func-
tion is only an aid and is not a substitute foryo ur
attentiveness. #
During the closing process, make sure that no
body parts are in the closing area. &
W
WARNING
ARNING Risk of becoming trapped
despite there ve rsing function being active
In particular, there ve rsing function does not
re act:
R tosoT, light and thin objects, e.g. /n gers.
R towa rdsth e end of the closing procedure.
R during resetting. #
During the closing process, make sure
th at no body parts are in the closing
area. #
Release the button immediately if some-
body becomes trapped.
or #
Brie0y press the button in any direction
during automatic operation.
The closing process will be stopped. A A
ut
ut omatic rev
omatic rever
ersing function of t
sing function of t he r
he roller sunblind
oller sunblind
If an obstacle obstructs thero ller sunblind during
th e closing process, thero ller sunblind will open
again automaticall y.The automatic reve rsing func-
tion is only an aid and is not a substitute foryo ur
attentiveness. 100
100
Opening and closing

R
when tow- awa y protection is triggered
(/ page 103)
The ATA system is primed automatically aTer
appr oximately ten seconds in thefo llowing situa-
tions:
R aTer locking theve hicle with thekey
R aTer locking theve hicle using KEYLESS-GO Indicator lamp
10ashes when theATA system is
primed.
The ATA system is deacti vated automatically in the
fo llowing situations:
R aTer unlocking theve hicle with thekey
R aTer unlocking theve hicle using KEYLESS-GO
R aTer pressing the start/s top button with the
ke y in the st owage compartment
(/ page 170)
% When the Mercedes‑Benz emer gency call sys-
te m is active and the alarm st ays on for more
th an 30 seconds, a message is automatically
sent tothe Customer Assistance Centre
(/ page 325).
Deactiv Deactiv ating t
ating theATA
he ATA #
Press theÜ, ßor008B button on the
key.
or #
Press the start/s top button with theke y in the
st ow age compartment (/ page 170) Deactiv
Deactiv
ating t
ating the alar
he alar m using KEYLESS-GO
m using KEYLESS-GO #
Grasp the outside door handle with thekey
outside theve hicle. F
F
unction of tow
unction of tow-awa
-a wa y pr ot
y pr otection
ection An audible and visual alarm is triggered if an alter-
ation
toyour vehicle's angle of inclination is
de tected while tow- awa y protection is primed.
To w- awa y protection is automatically primed aTer
appr oximately 60 seconds:
R aTer locking theve hicle with thekey
R aTer locking theve hicle using KEYLESS-GO
To w- awa y protection is only primed when thefo l-
lowing components are closed:
R doors
R tailgate
To w- awa y protection is automatically deactivated:
R aTer pressing theÜ or008B button on the
key Opening and closing
103 103