2021 MERCEDES-BENZ A-CLASS HATCHBACK lock

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

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

Child safe
Child safe
ty locks
ty loc ks A
A
ctiv
ctiv ating or deactiv
ating or deactiv ating t
ating the c
he c hild safe
hild safe ty loc
ty lock f
k for
or
t
t he r
he r ear doors
ear doors &
W
W ARNING
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. &
W
WARNING
ARNING Risk offatal injury due toexpo-
sure toextreme heat or cold in theve hicle
If persons, particular lych ildren, are subjected
to prolonged exposure tointense heat or cold,
th ere is a risk of se vere injury or even death. #
Never lea vepersons, particular lych il-
dren, unattended in theve hicle. &
W
WARNING
ARNING Risk of accident and injury due
to children leT unattended in theve hicle
If ch ildren are tr avelling in theve hicle, they
could, in particular:
R open doors, thereby endangering other
persons or road users.
R get out and be st ruck byoncoming tra1c.
R operate vehicle equipment and become
trapped, forex ample. #
Always activate the installed child saf ety
loc ksifch ildren are tr avelling in theve hi-
cle. #
Never lea vechildren unattended in the
ve hicle. #
When leaving theve hicle, alw aysta ke the
ke y with you and lock theve hicle. Ve
hicles forth e United Kingdom: obser vethe
impor tant sa fety no tes in the "No tes on the addi-
tional door lock" section.
There are child saf ety loc ksforth ere ar doors and
th ere ar side wind ows.
The child saf ety lock on there ar doors secures
each door separatel y.The doo rscan no longer be
opened from the inside. Occupant saf
ety
79 79

#
Press the le ver in direction 1(activate) or 2
(deactivate). #
Make sure that thech ild saf ety loc ksare work-
ing proper ly. A
A ctiv
ctiv ating and deactiv
ating and deactiv ating t
ating the c
he child safe
hild safe ty lock
ty lock
f
f or t
or t he r
he r ear side windo ws
ear side windo ws #
T
T o activ
o activ at
ate/deactiv
e/deactiv at
ate:
e: press button 2.
The rear side wind owcan be opened or closed
in thefo llowing cases:
R indicator lamp 1is lit: via the switch on
th e driver's door R
indicator lamp 1is o.: via the switch on
th e cor responding rear door or driver's
door N
No
ot
tes on pe
es on pe ts in t
ts in the v
he vehicle
ehicle &
W
WARNING
ARNING Risk of accident and injury due
to animals leT unsecured or unat tended in
th eve hicle
If yo u lea veanimals in theve hicle unat tended
or unsecured, they could press buttons or
switches, for instance.
An animal ma y:
R activate vehicle equipment and become
trapped, forex ample
R switch systems on or o. and endanger
other road users
Unsecured animals may be thro wn about the
ve hicle in theev ent of an accident, or sudden
steering and braking manoeuvres, and injure
ve hicle occupants. 80 80
Occupant saf
ety

K
K
e
ey
y Ov
Ov
er
ervie
vie w of ke
w of key functions
y functions &
W
WARNING
ARNING Risk of accident and inju rydue
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. *
N
NOOTE
TE Damage totheke y caused bymag-
netic /elds #
Keep theke yaw ay from strong magnetic
/elds. Ve
hicle key
1 Locks 2
Indicator lamp
3 Unloc ks
% If indicator lamp 2does not light up aTer
pressing theÜ orß button, the battery
is we ak or possibly dischar ged. Re place the
battery as soon as possible.
Re place theke y battery (/ page 84).
The key loc ksand unloc ksthefo llowing compo-
nents:
R Doors
R Fuel /ller 0ap
R Soc ket 0ap (plug-in hybrid)
R Tailgate
If th eve hicle is not opened within appr oximately
40 seconds aTer unlocking, it loc ksagain. Anti-
th eT pr otection is primed again.
Do not keep theke yto get her with elect ronic devi-
ces or me tal objects. This can a.ect theke y's
functionalit y. 82 82
Opening and closing

A
A
ctiv
ctiv ating/deactiv
ating/deactiv ating t
ating the acous
he acous tic loc
tic locking
kingv
ver
er i/-
i/-
cation
cation signal
signal Multimedia system:
4 © 5
Settings 5
Vehicle #
Activate or deactivate Acoustic lock.
% Please observ
Please observ e:
e:
The selected setting forth e acoustic locking
ve ri/cation signal must comply with there le-
va nt national road and tra1c regulations. In
some countries, including German y,using the
acoustic locking veri/cation signal is forbid-
den bytra1c la ws(in accordance with §16
Pa ra. 1 and §30 Para. 1 of the German
national road tra1c regulations). The driver of
th eve hicle must comply with these regula-
tions. In countries where the use of this func-
tion is forbidden, this function is not activated
in theve hicle and must not be activated. Changing t
Changing t
he unloc
he unlocking se
king se ttings
ttings Po
ssible unlocking functions of theke y:
R Central unlocking
R Unlocking the driver's door and fuel /ller 0ap R
Plug-in h Plug-in h ybr ybrid:
id:unlocking the driver's door and
fuel /ller 0ap/soc ket0 ap #
T To switc o switc h be
h betw
tween se
een se ttings:
ttings: presstheÜ
and ß buttons simultaneously for appr ox-
imately six seconds until the indicator lamp
0ashes twice.
Options if the unlocking function forth e driver's
door and fuel /ller 0ap has been selected:
R T To unloc o unloc k t
k the v
he v ehicle centr
ehicle centr ally:
all y: press the
Ü button twice.
R V
Vehicles wit
ehicles wit h KEYLESS-GO:
h KEYLESS-GO: ifyo uto uch the
inner sur face of the door handle on the driv-
er's door, only the driver's door and the fuel
/ller 0ap are unloc ked.
Options if the unlocking function forth e driver's
door and fuel /ller 0ap/soc ket0 ap has been
selected (plug-in-hybrid):
R T
To unloc
o unloc k t
k the v
he v ehicle centr
ehicle centr ally:
all y: press the
Ü button twice.
R V
Vehicles wit
ehicles wit h KEYLESS-GO:
h KEYLESS-GO: ifyo uto uch the
inner sur face of the door handle on the driv-
er's door, only the driver's door and the fuel
/ller 0ap/soc ket0 ap are unloc ked. Deactiv
Deactiv
ating t
ating the function of t
he function of t hekey
he key V
V
ehicles wit
ehicles wit h KEYLESS-GO:
h KEYLESS-GO: ifyo u deactivate the
function of theke y,the KEYLESS-GO functions are
also deactivated. Access or drive authorization by
KEYLESS-GO is then no longer possible with that
particular key.Activate the function of theke y so
th at all its functions will again be available.
Yo u can also deactivate the function of theke yto
re duce the energy consum ption of theke y if you
do not use theve hicle or a keyfo r an extended
period of time. #
T
To deactiv
o deactiv at
ate:
e: press theß button on the
ke y twice in quick succession.
The key indicator lamp 0ashes twice brie0y
and lights up once. #
T
To activ
o activ at
ate:
e: press any but ton on thekey.
% When theve hicle is star ted with theke y in the
st ow age compartment of the centre console,
th e function of theke y is automatical lyactiva-
te d (/ page 166). Opening and closing
83
83

Mercedes-Benz
recommends that you ha vethe
battery replaced at a quali/ed specialist work-
shop. #
Remo vethe emer gency key (/ page 84). #
Press release knob 2down fully and slide
co ver1 inthe direction of the ar row. #
Fold out co ver1 inthe direction of the ar row
and remo ve. #
Remo vebattery compartment 3and take
out the dischar ged batter y. #
Insert the new battery into battery compart-
ment 3. Obser vethe positive pole marking in th
e battery compartment and on the battery
when doing this. #
Push in battery compartment 3. #
Re-attach co ver1 and push it until it
engages. Pr
Pr
oblems wit
oblems wit h t
h the key
he key , tr
, troubleshoo
oubleshoo ting
ting Y
Y
ou can no long
ou can no long er loc
er lock or unloc
k or unloc k t
k the v
he v ehicle
ehicle
Po ssible causes:
R The key battery is weak or dischar ged. #
Check the battery using the indicator lamp
(/ page 82). #
Replace theke y batter y,if necessary
(/ page 84). #
Use there placement key. #
Use the emer gency keyto lock or unlock
(/ page 89). #
Have theke ych ecked at a quali/ed specialist
wo rkshop. Ther
Ther
e is int
e is int erf
erfer
erence fr
ence fr om a pow
om a pow er
erful r
ful r adio signal
adio signal
sour
sour ce
ce
Po ssible causes if the function of theke y is
impaired:
R high voltage po wer lines
R mobile phones
R electronic devices (no tebooks, tablets)
R shielding due tome tal objects or induction
loops for electrical gate systems or automatic
bar riers #
Make sure that there is su1cient distance
between theke y and the po tential sou rce of
inter fere nce.
Y
Y ou hav
ou hav e los
e lost a key
t a key #
Have theke y deactivated at a quali/ed spe-
cialist workshop. #
If necessar y,ha ve the mechanical lock
re placed as well. Opening and closing
85
85

Doors
Doors
N
No
ot
tes on t
es on t he additional door lock
he additional door lock The additional door lock is only
available forve hi-
cles forth e United Kingdom. &
W
WARNING
ARNING Risk of injury topersons inside
th eve hicle when the additional door lock
is activated
If th e additional door lock is activated, the
doors can no longer be opened from the
inside. #
Never lea vepersons, in particular chil-
dren, unattended in theve hicle. #
Ifth ere are persons in theve hicle, do not
activate the additional door loc k.The additional door lock is automatically activated
in
thefo llowing situations:
R The vehicle is loc ked using thekey.
R The vehicle is loc ked using KEYLESS-GO. If
th eve hicle has been loc ked via Mercedes me
connect, the additional door lock is not activated
(/ page 315).
If th e additional door lock is activated, the doors
cannot be opened from the inside.
% ATer locking you can issue a signal with the
horn.
Yo u can pr event the additional door lock from
being activated bydeactivating interior pr otection
before locking theve hicle (/ page 101). U Unloc
nloc king/opening t
king/opening t he door
he doors fr
s from t
om t he inside
he inside #
U
Unitnit ed Kingdom only
ed Kingdom only :
: obser vethe no tes on
th e additional door lock (/ page 86). #
Pull door handle 1.86
86
Opening and closing