warning MERCEDES-BENZ A-CLASS SALOON 2021 Service Manual

*
N
N O
OTE
TE Damage tothe boot lid byobstacles
abo vetheve hicle The boot lid swings upwards when it is
opened. #
Therefore, make sure that there is su1-
cient clearance abo vethe boot lid. #
Pull the boot lid handle. #
V
Vehicles 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). #
Pull remo teoperating switch 1until the boot
lid opens.
or #
Press and hold thep button on thekey. Closing t
Closing t
he boo
he boot lid
t lid &
W
WARNING
ARNING Risk of injury from unsecured
items in theve hicle
If objects, lug gage or loads are not secured or
not secured su1cient ly,they could slip, tip
ov er or be thro wn around and thereby hit vehi-
cle occupants.
There is a risk of injur y,particular lyin the
eve nt of sudden braking or a sudden change
in direction. #
Always st owobjects in such a wayth at
th ey cannot be thro wn around. #
Before the journe y,secure objects, lug-
ga ge or loads against slipping or tipping
ove r. Obser
vethe no tes on loading theve hicle.
N No ot
tes on closing t
es on closing t he boo
he boot lid:
t lid:your vehicle is
equipped with automatic keyre cognition. If a key
belonging totheve hicle is de tected in theve hicle,
th e boot lid will not be loc ked and will pop open
again. Opening and closing
91
91

No
tethat the boot lid will not be loc ked if thefo l-
lowing situation occurs:
R You ha veloc kedth eve hicle and close the
boot lid while a key belonging totheve hicle is
inside theve hicle.
and
R A second key belonging totheve hicle is not
de tected outside theve hicle.
Au tomatic keyre cognition is only an aid and is not
a substitute foryo ur attentiveness. #
Before locking, ensure that at least one key
belonging totheve hicle is outside theve hicle. #
T To close t
o close t he boo
he boot lid:
t lid:pullthe boot lid down-
wa rds using the handle recess and push it
closed. HANDS-FREE A
HANDS-FREE A
CCESS function
CCESS function Wi
th HANDS-FREE ACCESS you can open the
boot lid byper form ing a kicking mo vement under
th e bumper.
Obser vethe no tes when opening the boot lid
(/ page 90). &
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
NOOTE
TE Damage totheve hicle caused by
unintentionally opening the boot lid R
when using an automatic car wash
R when using a high pressure cleaner #
Deacti vate 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. 92
92
Opening and closing

Side windo
ws
Side windo ws Opening and closing t
Opening and closing t
he side windows
he side wind ows &
W
WARNI NG
ARNI NGRisk of becoming trapped when
opening a side wind ow
When you open a side windo w,parts of the
body could be dr awn in or become trapped
between the side window and window frame. #
When opening, make sure that nobody is
to uching the side windo w. #
If someone is trapped, release the but-
to n immedia tely or pull it in order to
close the side window again. &
W
WARNING
ARNING Risk of becoming trapped when
closing a side window
When closing a side windo w,body parts could
be trapped in the closing area in the process. #
When closing, make sure that no body
parts are in the closing area. #
If someone is trapped, release the but-
to n immedia tely or press the button in
order toreopen the side windo w. &
W
WARNI NG
ARNI NGRisk of becoming trapped when
ch ildren operate the side windo ws
Children could become trapped if they operate
th e side windo ws,particular lywhen unat ten-
ded. #
Activate thech ild saf ety lock forth ere ar
side wind ows. #
When leaving theve hicle, alw aysta ke the
ke y with you and lock theve hicle. #
Never lea vechildren unattended in the
ve hicle. R
R
eq
eq uir
uir ements:
ements:
R The po wer supply or theve hicle has been
switched on. 1
Closing
2 Toopen
The buttons on the driver's door take precedence. #
T
To st
o st ar
art aut
t aut omatic oper
omatic oper ation:
ation:presstheW
button be yond the point of resis tance or pull
and release it. #
T
To int
o int err
errup
upt aut
t aut omatic oper
omatic oper ation:
ation:press or pull
th eW button again. 94
94
Opening and closing

R
R
eq
eq uir
uir ements:
ements:
R The key is in the immediate vicinity of theve hi-
cle. #
Press and hold theÜ button on thekey.
The following functions are per form ed:
R The vehicle is unloc ked.
R The side windo wsare opened.
R The panoramic sliding roof is opened.
R The seat ventilation of the driver's seat is
switched on.
% Ifth ero ller sunblind of the panoramic sliding
sunroof is closed, thero ller sunblind is
opened /rst. #
T
To int
o int err
errup
upt conv
t conv enience opening:
enience opening: release the
Ü button. #
T
To continue conv
o continue conv enience opening:
enience opening: press and
hold theÜ button again. Conv
Conv
enience closing (closing t
enience closing (closing t he v
he vehicle fr
ehicle fr om out-
om out-
side)
side) &
W
WARNING
ARNING Risk of entrapment due tonot
paying attention during con venience clos-
ing
When the con venience closing feature is oper-
ating, parts of the body could become trapped
in the closing area of the side window and the
sliding sunroof. #
When the con venience closing feature is
operating, moni torth e entire closing
process and make sure that no body
parts are in the closing area. R
R
eq
eq uir
uir ements:
ements:
R The key is in the immediate vicinity of theve hi-
cle. #
Press and hold theß button on thekey.
The following functions are per form ed:
R The vehicle is loc ked.
R The side windo wsare closed.
R The pano ramic sliding roof is closed. #
T
To int
o int err
errup
upt conv
t conv enience closing:
enience closing: release the
ß button. #
T
To continue conv
o continue conv enience closing:
enience closing: press and
hold theß button again.
% Con venience closing also functions with KEY-
LESS-GO (/ page 87). R
R
esol
esol ving pr
ving pr oblems wit
oblems wit h t
h the side wind ows
he side wind ows &
W
WARNI NG
ARNI NGRisk of becoming trapped or
fata lly injured if reve rsing pr otection is not
activated
If yo u close a side window again immediately
aTer it has been bloc ked, the side window will
close with increased or maximum forc e. The
re ve rsing function is then not active and body
parts may become trapped. #
Make sure that no parts of the body are
in the closing area. #
Tostop the closing process, release the
button or press the button again to
re open the side windo w. 96
96
Opening and closing

A side windo
A side windo
w canno
w cannot be closed and y
t be closed and y ou cannot
ou cannot
see t
see t he cause.
he cause. #
Che cktosee whe ther any objects are in the
wind owguide. #
Adjust the side windo ws.
A
A djus
djus ting t
ting t he side window
he side window s
s
If a side window is obstructed during closing and
re opens again immediatel y:#
Immediately aTer this, pull and hold the cor re-
sponding button again until the side window
has closed and hold the button for at least one
more second (re-adjustment).
The side window will be closed without the
automatic reve rsing function.
If th e side window is obstructed again and
re opens again immediatel y:#
Immediately aTer this, pull and hold the cor re-
sponding button again until the side window
has closed and hold the button for at least one
more second (follo w-up adjustment).
The side window will be closed without the
automatic reve rsing function. The side window The side window
s canno
s cannot be opened or closed
t be opened or closed
using t
using t he conv
he conv enience opening f
enience opening f eatur
eature.
e.
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). Sliding sunr
Sliding sunr
oof
oof Opening and closing t
Opening and closing t
he sliding sunr
he sliding sunroof
oof %
The term "sliding sunroof" also refers to the
panorama sliding sunroof. &
W
WARNING
ARNING Risk of becoming trapped when
th e sliding sunroof is being opened and
closed
Body parts may become trapped in thera nge
of mo vement. #
During opening and closing, make sure
th at no body parts are in thera nge of
mo vement. #
Release the button immediately if some-
body becomes trapped.
or #
Brie0y press the button in any direction
during automatic operation.
The opening or closing process will be
stopped. &
W WARNING
ARNING Risk of entrapment if the slid-
ing sunroof is operated bychildren
Children operating the sliding sunroof could
get caught in the moving parts, particular lyif
unattended. #
Never lea vechildren unattended in the
ve hicle. #
When leaving theve hicle, alw aysta ke the
ke y with you and lock theve hicle. Opening and closing
97
97

#
Check whe ther the sliding sunroof can be
ra ised or opened when a roof luggage rack is
/t ted. #
T
To st
o st ar
art aut
t aut omatic oper
omatic oper ation:
ation:pressthe3
button be yond the point of resis tance or pull
and release it. #
T
To int
o int err
errup
upt aut
t aut omatic oper
omatic oper ation:
ation:brie0y press
th e3 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. #
When closing thero ller sunblind, make sure
th at no body parts are in thera nge of mo ve-
ment. &
W
WARNING
ARNING Risk of becoming trapped
despite reve rsing function
In particular, there ve rsing function does not
re act tosoT, light and thin objects, e.g. /n-
ge rs. #
When closing thero ller sunblind, make
sure that no body parts are in thera nge
of mo vement. #
Release the button immediately if some-
body becomes trapped.
or #
Brie0y press the button in any direction
during the automatic closing process.
The closing process will be stopped. A
A
ut
ut omatic functions of t
omatic functions of t he sliding sunr
he sliding sunr oof
oof %
The term "sliding sunroof" also refers to the
panorama sliding sunroof. Opening and closing
99
99

N
N
o
ot
tes on t
es on t he corr
he corr ect dr
ect driv
iver's seat position
er's seat position &
W
WARNING
ARNING Risk of accident due toadjust-
ing theve hicle settings while theve hicle is
in motion
Yo u could lose control of theve hicle in thefo l-
lowing situations in particular:
R ifyo u adjust the driver's seat, the head
re straint, the steering wheel or the mir ror
while theve hicle is in motion
R ifyo ufa sten your seat belt while theve hi-
cle is in motion #
Before starting theve hicle: in particular,
adjust the driver's seat, head restraint,
stee ring wheel and mir ror,and fasten
yo ur seat belt. Ensure
thefo llowing when adjusting the steering
wheel 1, seat belt 2and driver's seat 3:
R You are sitting as farawa y from the driver's
airbag as possible, taking thefo llowing points
into consideration:
R You are sitting in an upright position
R Your thighs are slightly suppor tedby the seat
cushion R
Your legs are not fully extended and you can
depress the pedals proper ly
R The back of your head is suppor ted at eye
le ve lby the centre of the head restraint
R You can hold the steering wheel with your
arms slightly bent
R You can mo veyour legs freely
R You can see all the displa yson the inst rument
cluster clear ly
R You ha vea good overview of the tra1c condi-
tions
R Your seat belt sits snugly against your body
and passes across the centre of your shoulder
and across your hips in the pelvic area
V
V ehicles wit
ehicles wit h an AMG perf
h an AMG perf or
ormance seat
mance seat :
:if the
front passenger seat is unoccupied, this can lead
to noise caused bythe seat belt tongue knocking
against the seat. You can pr event this by sliding
th e seat belt tongue upwards with the belt clip. If
th e front passenger seat is occupied, ensure that
th e belt clip is pushed down. Only then will the
seat belt /t tight tothe body. 104
104
Seats and st
owing

Seats
Seats
A
A
djus
djusting t ting t he fr
he front seat mec
ont seat mec hanicall
hanically (wit
y (without
hout
Seat Comf
Seat Comf or
ort P
t P ack
ack ag
age)
e) &
W
WARNING
ARNING Risk of becoming trapped if the
seats are adjusted bychildren
Children could become trapped if they adjust
th e seats, particular lywhen unat tended. #
When leaving theve hicle, alw aysta ke the
ke y with you and lock theve hicle. #
Never lea vechildren unattended in the
ve hicle. &
W
W ARNING
ARNING Risk of becoming trapped dur-
ing seat adjustment
When you adjust a seat, you or other vehicle
occupants could become trapped, e.g. on the
seat guide rail. #
Make sure when adjusting a seat that no
one has any body parts in the sweep of
th e seat. Obser
vethe saf ety no tes on "Airbags" and "Chil-
dren in theve hicle". &
W
WARNING
ARNING Risk of accident due tothe
driver's seat not being engaged
The driver's seat may mo veunexpectedly
while driving.
This could cause youto lose control of the
ve hicle. #
Always make sure that the driver's seat
is engaged before starting theve hicle. &
W WARNING
ARNING Risk of accident due toadjust-
ing theve hicle settings while theve hicle is
in motion
Yo u could lose control of theve hicle in thefo l-
lowing situations in particular:
R ifyo u adjust the driver's seat, the head
re straint, the steering wheel or the mir ror
while theve hicle is in motion
R ifyo ufa sten your seat belt while theve hi-
cle is in motion #
Before starting theve hicle: in particular,
adjust the driver's seat, head restraint,
stee ring wheel and mir ror,and fasten
yo ur seat belt. &
W
WARNING
ARNING Risk of becoming trapped if the
seat height is adjusted carelessly
If yo u adjust the seat height carelessl y,yo u or
ot her vehicle occupants could be trapped and
th ereby injured.
Children in particular could accidentally press
th e electrical seat adjustment buttons and
become trapped. #
While moving the seats, make sure that
hands or other body parts do not get
under the le ver assembly ofthe seat
adjustment system. Seats and st
owing
105 105

&
W
WARNI NG
ARNI NGRisk of injury due tohead
re straints not being /tted or being adjus-
te d incor rectly
If head restraints ha venot been installed or
ha ve not been adjusted cor rectl y,there is an
increased risk of injury in the head and neck
area, e.g. in theeve nt of an accident or when
braking. #
Always drive with the head restraints /t-
te d. #
Before driving o., make sure forev ery
ve hicle occupant that the centre of the
head restraint supports the back of the
head at about eye le vel. Do not inter
change the head restraints of the
front and rear seats. Otherwise, you will not be
able toadjust the height and angle of the head
re straints co rrectl y.
Ad just the head restraint fore -and-aT position so
th at it is as close as possible tothe back of your
head. &
W
WARNING
ARNING Risk of injury or death due to
incor rect seat position
The seat belt will not o.er the intended le vel
of pr otection if you ha venot mo vedth e seat
backrest toan almost vertical position.
In particular, you may slip under the seatbelt
and injure yourself. #
Adjust the seat proper lybefore begin-
ning your journe y. #
Always ensu rethat the seat backrest is
in an almost vertical position and that
th e shoulder section of your seat belt is
ro uted across the centre of your shoul-
der. &
W
WARNING
ARNING Risk of injury due toexcessive
st ra in on thegr ab handle
If yo u apply your full body weight tothegr ab
handle or pull it abruptl y,thegr ab handle may
be damaged or become loose from its anchor-
age. #
Use thegr ab handles only tostabilise
th e seating position or toassist in get-
ting in and out of the seat. &
W
WARNING
ARNING Risk of injury or death due to
objects under the co-driver seat
Objects trapped under the co-driver seat can
inter fere with the function of the automatic
co-driver airbag shuto. or damage the system. #
Do not store any objects under the co-
driver seat. #
When the co-driver seat is occupied,
make sure that no objects are trapped
under the co-driver seat. 106
106
Seats and st
owing

A
A
djus
djus ts t
ts the seat
he seat f
for
or e-and-aT
e-and-aT position
position #
LiT le ver1 and slide the seat into the
desired position. #
Make sure that the seat is engaged. #
T
To adjus
o adjust t t the seat height:
he seat height: push or pull lever2
until the desired position has been reached. #
T
To adjus
o adjust t t the seat bac
he seat bac kr
kres
es t inclination:
t inclination: turn
handwheel 3forw ards and backwards until
th e desired position has been reached. A
A
djus
djusting t ting t he fr
he front seat mec
ont seat mec hanicall
hanically (wit
y (with Seat
h Seat
Comf
Comf or
ort P
t P ack
ack ag
age)
e) &
W
WARNING
ARNING Risk of becoming trapped if the
seats are adjusted bychildren
Children could become trapped if they adjust
th e seats, particular lywhen unat tended. #
When leaving theve hicle, alw aysta ke the
ke y with you and lock theve hicle. #
Never lea vechildren unattended in the
ve hicle. &
W WARNING
ARNING Risk of becoming trapped dur-
ing seat adjustment
When you adjust a seat, you or other vehicle
occupants could become trapped, e.g. on the
seat guide rail. #
Make sure when adjusting a seat that no
one has any body parts in the sweep of
th e seat. Obser
vethe saf ety no tes on "Airbags" and "Chil-
dren in theve hicle". &
W WARNING
ARNING Risk of accident due tothe
driver's seat not being engaged
The driver's seat may mo veunexpectedly
while driving.
This could cause youto lose control of the
ve hicle. #
Always make sure that the driver's seat
is engaged before starting theve hicle. Seats and st
owing
107 107