2021 MERCEDES-BENZ A-CLASS HATCHBACK Owners Manual

Ov
Ov
er
ervie
vie w of suit
w of suit ability of t
ability of t he seats f
he seats for att
or attac
aching
hing
i‑Size c
i‑Size c hild r
hild res
estrtraint syst
aint syst ems
ems
i‑Size is a standardised securing system for spe-
cially designed child restraint systems.
° The symbol indicates seats suitable for
attaching an i‑Size child restraint system in
acco rdance with UN R129 (/ page 67).
Child restraint systems that are permitted
in accordance with UN R44 as per the ISO-
FIX tables (/ page 68) or UN R129 as per
th efo llowing i‑Size tables may be attached.
i‑Size c
i‑Size c hild r
hild res
estrtraint syst
aint syst ems (ISO/R2, ISO/F2X,
ems (ISO/R2, ISO/F2X,
ISO/B2, ISO/B3)
ISO/B2, ISO/B3) F
F
r
ront passeng
ont passeng er seat
er seatLeT/r
LeT/right
ightr
rear seat
ear seat
Xi ‑U
X Not suitable for an i-Size child
re straint system in the "Univer-
sal" categor y. i-U Suitable
forfo rw ard-facing
and rear wa rd-facing i-Size child
re straint systems in the "Univer-
sal" categor y. F
F
itting t
itting t he ISOFIX or i‑Size c
he ISOFIX or i‑Size c hild r
hild res
estrtraint syst
aint syst em
em
on t
on t he
heleT
leT and r
and r ight r
ight r ear seats
ear seats &
W
WARNING
ARNING Risk of accident if there ar
ben chseat, rear seat and seat backrest
are not engaged
The rear ben chseat, rear seat and seat bac k-
re st ma yfo ld forw ards, even while theve hicle
is in motion.
R As a result, theve hicle occupant will be
pressed into the seat belt with increased
fo rc e. The seat belt will not be able topro-
te ct as intended and could cause addi-
tional injur y.
R Objects or loads in the boot or load com-
partment cannot be restrained bythe seat
backrest. #
Make sure that there ar ben chseat, the
re ar seat and the seat backrest are
engaged before every trip. If
th ere ar seat backrest is not engaged and
loc ked in place, there d lock veri/cation indicator
will be visible. &
W
WARNING
ARNING Risk of inju ryor death if the
permissible gross mass of thech ild and
ch ild restraint system toge ther is excee-
ded.
To o much load may be placed on the ISOFIX
or i‑Size child restraint systems and thech ild
may not be restrained co rrectly in theev ent of
an accident, forex ample. #
Ifth ech ild and thech ild restraint system
to get her weigh more than 33 kg, only
use an ISOFIX or i‑Size child restraint
system wi thwhich thech ild is secured
with theve hicle seat belt. #
Also secure thech ild restraint system
wi th th eTo pTe ther belt, if available. Alw
ays comply with the information about the
mass of thech ild restraint system:
R inthe manufacturer's installation and operat-
ing inst ructions forth ech ild restraint system
used
R on a label on thech ild restraint system, if
present 70
70
Occupant sa
fety

Re
gula rly ch eck that the permissible gross mass
of thech ild and child restraint system is still com-
plied wi th.
When /tting a child restraint system, obse rvethe
fo llowing:
O Always obser vethe cor rect use of the seats
and consider their suitability for attaching a
ch ild restraint system.
ISOFIX child seat securing system
(/ page 68)
or
i‑Size child seat securing system
(/ page 70)
O Always comply with the manufacturer's
installation and operating inst ructions forthe
ch ild restraint system used.
O Makesure that thech ild's feet do not touch
th e front seat. If necessar y,mo vethe front
seat slightly forw ards.
® When /tting an ISOFIX child restraint sys-
te m, also obser vethefo llowing:
O When using a bab
When using a bab y car seat in w y car seat in weightgr
eight group
oup
0/0+ and a r
0/0+ and a r earw
earwar
ard-f
d-f acing c
acing c hild r
hild res
estrtraint
aint syst
syst
em in w
em in w eightgr
eight group 1 on a r
oup 1 on a r ear seat
ear seat: :
adjust the front seat so that the seat does
not touch thech ild restraint system.
O When using a f
When using a f orw
orwar
ard-f
d-f acing c
acing c hild r
hild res
estrtraint
aint
syst
syst em in w
em in w eightgr
eight group 1:
oup 1: remo vethe head
re straint from there specti veseat, if possible.
In addition, the backrest of thech ild restraint
system must lie as 0at as possible again st
th e backrest of theve hicle seat.
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.
O 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 group 2 or 3.
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.
O Thechild restraint system must not be put
under strain between thero of and the seat
cushion and/or be /t tedfacing the wrong direction. Where possible, adjust
the seat
cushion inclination accordingl y.
O Thechild restraint system must not be put
under strain bythe head restraint. Adjust the
head restraints as appropria te.
° When /tting an i‑Size child restraint system,
also obse rveth efo llowing:
O When using a r
When using a r earw
earwar
ard-f
d-f acing c
acing c hild r
hild res
estrtraint
aint
syst
syst em:
em: adjust the front seat so that it does
not touch thech ild restraint system.
O When using a f
When using a f orw
orwar
ard-f
d-f acing c
acing c hild r
hild res
estrtraint
aint
syst
syst em:
em: remo vethe head restraint from the
re specti veseat, if possible. In addition, the
backrest of thech ild restraint system must
lie as 0at as possible again stthe backrest of
th eve hicle seat.
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. Occupant saf
ety
71
71

1
ISOFIX mounting brac ket
2 i‑Size mounting brac ket#
Before every journe y,make sure that the ISO-
FIX child restraint system or the i‑Size child
re straint system is engaged co rrectly in bo th
mounting brac kets in theve hicle. *
N
NO OTE
TE Damage tothe seat belt forthe
cent reseat during ins tallation of thech ild
re straint system #
Makesure that the seat belt is not trap-
ped. #
Attach the ISOFIX or i‑Size child restraint sys-
te m to both mounting brac kets in theve hicle. F
F
ast
ast ening a T
ening a T opTet
op Tether
her &
W
WARNING
ARNING Risk of injury or death if the
re ar seat backrests are not loc ked aTer
To pTe ther belts are /t ted
The rear seat backrests may fold forw ards
when you are driving.
As a result, child restraint systems will no lon-
ge r be able toper form their intended pr otec-
tive function. This may also cause additional
injuries. #
Always lock rear seat backrests aTer /t-
ting TopTe ther belts. #
Obser vethe lock veri/cation indicator. If
th ere ar seat backrest is not engaged and
loc ked in place, there d lock veri/cation indicator
will be visible.
¯ Ifth ech ild restraint system is equipped
wi th aTo pTe ther belt:
The risk of injury may be reduced byTo p
Te ther. The TopTe ther belt enables an
additional connection between thech ild
re straint system at tach ed with ISOFIX or
i‑Size and theve hicle. 72 72
Occupant saf
ety

V
V
ehicles wit
ehicles wit h adjust
h adjustable head r
able head r es
estrtraints:
aints: #
If necessar y,slide the head restraint up wards
( / page 109). #
Guide TopTe ther belt 3under the head
re straint between the two head restraint ba rs.
V
V ehicles wit
ehicles wit hout adjust
hout adjust able head r
able head res
estrtraints:
aints: #
TopTe ther belt with one seat belt strap: guide
To pTe ther belt 3overth e centre of the head
re straint.
or #
TopTe ther belt with two seat belt straps: guide
one TopTe ther belt 3past the head restraint
on theright and leT sides respecti vely. All v
All v
ehicles:
ehicles: #
Fitth e ISOFIX or i‑Size child restraint system
wi th TopTe ther. In doing so, comply with the
ch ild restraint system manufactu rer's installa-
tion inst ructions. #
Hook TopTe ther hook 2into TopTe ther
anchorage 1without twisting. #
Tension TopTe ther belt 3. In doing so, com-
ply with thech ild restraint system manufactu r-
er's installation inst ructions.
V
V ehicles wit
ehicles wit h adjust
h adjustable head r
able head r es
estr
traints:
aints: #
If necessar y,slide the head restraint down-
wa rds (/ page 109). Make sure that you do
not inter fere with the cor rect routing of To p
Te ther belt 3. Secur
Secur
ing t
ing t he c
he c hild 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
egor y 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 Occupant saf
ety
73
73

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 "Universal"
category in this we ight categor y.
L Suitable for semi-universal child restraint systems
acco rding totheta ble in "Recommended child restraint
systems", or if theve hicle and the seat are listed in the
ch ild restraint system manufacturer'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). R
Obser vethe speci/c inst ructions forth ere ar-
wa rd-facing and forw ard-facing child restraint
systems. If the front passenger seat is occu-
pied, ensure, bo thbefore and during the jour-
ne y,that the status of the front passenger air-
bag is cor rect forth e cur rent situation
(/ page 57).
F
F r
ront passeng
ont passeng er seat
er seat
W
W eight cat
eight cat egor
egory 0: up t
y 0: up t o 10 kg
o 10 kg
Fr ont passenger airbag enabled 1
X
Fr ont passenger airbag disabled 1, 2
U, L
W
W eight cat
eight cat egor
egory 0+: up t
y 0+: up t o 13 k
o 13 kgg
Fr ont passenger airbag enabled 1
X
Fr ont passenger airbag disabled 1, 2
U, L
W W eight cat
eight cat egor
egory I: 9 t
y I: 9 t o 18 kg
o 18 kg
Fr ont passenger airbag enabled 1
UF, L
Fr ont passenger airbag disabled 1, 2
U, L
W W eight cat
eight cat egor
egory II: 15 t
y II: 15 t o 25 k
o 25 kgg Fr
ont passenger airbag enabled 1
UF, L
Fr ont passenger airbag disabled 1, 2
U, L
W
W eight cat
eight cat egor
egory III: 22 t
y III: 22 t o 36 kg
o 36 kg
Fr ont passenger airbag enabled 1
UF, L
Fr ont passenger airbag disabled 1, 2
U, L
1 Ad just the seat cushion inclination so that the
front edge of the seat cushion is in the highest posi-
tion and there ar edge of the seat cushion is in the
lo we st position.
2 The vehicle is equipped with automatic front
passenger airbag shuto.. The PASSENGER AIR BAG
OFF indica tor lamp must be lit.
X Not suitable forch ildren in this we ight categor y.
U Sui table forch ild restraint systems of the "Univer-
sal" category in this we ight categor y. 74
74
Occupant saf
ety

L Suitable
for semi-universal child restraint systems
acco rding totheta ble in "Recommended child
re straint systems", or if theve hicle and the seat are
listed in thech ild restraint system manufacturer's
ve hicle model list.
UF Suitable forfo rw ard-facing child restraint sys-
te ms of the "Universal" category in this we ight cate-
gor y. 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 r
he r ear seat
ear seat &
W
WARNING
ARNING Risk of accident if there ar
ben chseat, rear seat and seat backrest
are not engaged
The rear ben chseat, rear seat and seat bac k-
re st ma yfo ld forw ards, even while theve hicle
is in motion.
R As a result, theve hicle occupant will be
pressed into the seat belt with increased
fo rc e. The seat belt will not be able topro- te
ct as intended and could cause addi-
tional injur y.
R Objects or loads in the boot or load com-
partment cannot be restrained bythe seat
backrest. #
Make sure that there ar ben chseat, the
re ar seat and the seat backrest are
engaged before every trip. If
th ere ar seat backrest is not engaged and
loc ked in place, there d lock veri/cation indicator
will be visible.
When When /tting
/tting a belt-secur
a belt-secur ed c
ed child r
hild r es
estr
traint sy st
aint syst em,
em,
obse rv
observ e t
e the f
he f ollo
ollowing:
wing:
O Always comply with the manufacturer's
installation and operating inst ructions forthe
ch ild restraint system used.
O For a child restraint system in the "Universal"
or "Semi-Universal" categor y,make sure that
th e system has been appr ovedfo rth eve hicle
seat. Obser
vethe no tes under "Suitability of seats
fo r attaching belt-secured child restraint sys-
te ms" (/ page 73).
O When using a w When using a w eight cat eight categor
egory 0/0+ bab
y 0/0+ bab y
y
car seat and a w
car seat and a w eight cat
eight categor
egory I r
y I rearw
earw ar
ard-
d-
f
f acing c
acing c hild r
hild res
estrtraint syst
aint syst em on a r
em on a r ear seat:
ear seat:
adjust the front seat so that the seat does
not touch thech ild restraint system.
O When using a w
When using a w eight cat
eight categor
egory I f
y I forw
orw ar
ard-
d-
f
f acing c
acing c hild r
hild res
estr
traint sy st
aint syst em:
em:remo vethe
head restraint from there spective seat, 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.
O The backrest of thefo rw ard-facing child
re straint system must, as far as possible, be
re sting on the seat backrest of there ar seat.
O 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. Occupant saf
ety
75 75

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.
O Thechild restraint system must not be put
under strain between thero of and the seat
cushion and/or be /t tedfacing the wrong
direction. Where possible, adjust the seat
cushion inclination accordingl y.
O Thechild restraint system must not be put
under strain bythe head restraint. Adjust the
head restraints as appropria te.
O Make sure that thech ild's feet do not touch
th e front seat. If necessar y,mo vethe front
seat slightly forw ards. #
Installth ech ild restraint system.
The entire base of thech ild restraint system
must al ways rest on the seat sur face of the
re ar seat. #
Always make sure that the shoulder belt strap
is cor rectly routed from the seat belt outlet of
th eve hicle tothe shoulder belt guide on the
ch ild restraint system.
The shoulder belt strap must be routed
fo rw ard from the seat belt outlet. N
No ot
tes on v
es on v ehicles wit
ehicles wit hout aut
hout automatic fr
omatic fr ont
ont
passeng
passeng er airbag
er airbag shut
shuto.
o. St
icke r visible when the front passenger door is
open
Ve hicles without automatic front passen ger airbag
shuto. ha vea special stic ker a1xed tothe side of
th e cockpit on the front passenger side. Make sure
you obser vethefo llowing information:
R Never /t a rear wa rd-facing child restraint sys-
te m to the front passenger seat
R Always /t a rear wa rd-facing child restraint sys-
te m to a suitable rear seat
- Seats suitable for attaching belted child
re straint systems (/ page 73).
- Secure thech ild restraint system wi th the
seat belt on there ar seat (/ page 75).
R Notes on rear wa rd-facing and forw ard-facing
ch ild restraint systems on the front passenger
seat (/ page 76)
N
No ot
tes on r
es on r earw
earwar
ard-f
d-f acing and f
acing and f orw
orwar
ard-f
d-f acing c
acing c hild
hild
r
r es
estr traint syst
aint syst ems on t
ems on t he fr
he front passeng
ont passeng er seat
er seat &
W
WARNING
ARNING Risk of injury or death when
using a rear wa rd-facing child restraint sys-
te m while the front passenger airbag is
enabled
If yo u secure a child in a rear wa rd-facing child
re straint system on the front passenger seat
and thePA SSENGER AIR BAG OFF indicator 76
76
Occupant sa
fety

lamp is o.,
the front passenger airbag can
deploy in theev ent of an accident.
The child could be struck bythe airbag. #
Always ensu rethat the front passenger
airbag is disabled. The PASSENGER AIR
BAG OFF indicator la mpmust be lit. #
NEVER use a rear wa rd-facing child
re straint system on a seat wi than ENA-
BLED FRONT AIR BAG. This can result in
th e DEATH of or SERIOUS INJURY tothe
CHILD. Obse
rveth e speci/c inst ructions forth ere ar-
wa rd-facing and forw ard-facing child restraint sys-
te ms (/ page 77). 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 56).
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:
O Obser vethe no tes on rear wa rd-facing and
fo rw ard-facing child restraint systems on the
front passenger seat (/ page 76).
O Obser vethech ild restraint system manufac-
tu re r's installation and operating inst ructions.
O For a child restraint system in the "Universal"
or "Semi-Universal" categor y,make sure that
th e system has been appr ovedfo rth eve hicle
seat.
Obser vethe no tes under "Suitability of seats
fo r attaching belt-secured child restraint sys-
te ms" (/ page 73). Occupant saf
ety
77 77