buttons MERCEDES-BENZ A-CLASS HATCHBACK 2021 Owners Manual

Changing bulbs (only
forve hicles with hal-
ogen headlamps) ......................................... 143
Wi ndsc reen wipers and windscreen
wa sher system ............................................ 145
Mir rors ........................................................ 149 Climat
Climat
e contr
e control ol........................................... 153 153
Overview of climate control systems ............ 153
Operating the climate control system .......... 154 Dr
Dr
iving and par
iving and par king
king..................................... 162 162
Driving ........................................................1 62
DY NAMIC SELECT switch ........................... .178
Manual transmission ................................... 181
Au tomatic transmission .............................. .183
Fu nction of the 4MATIC ...............................1 87
Re fuelling .................................................... 188
Charging the high-voltage battery (plug-in
hy brid) ........................................................ 194
Pa rking .......................................................2 11
Driving and driving saf ety sy stems ............... 219
Tr ailer hitch ................................................ .270
Bicycle rack function ................................... 274
Ve hicle towing instructions .......................... 276 Ins
Ins
tr
trument displa
ument displa y and on-boar
y and on-boar d com-
d com-
put
put er
er........................................................... 277 277
No tes on the inst rument display and on-
board computer .......................................... 277
Overview of instrument display .................... 278
Overview of buttons on the steering wheel ... 279
Operating the on-board computer ................2 79
Fu nction of the po wer me ter (plug-in
hy brid) ........................................................ 281
Fu nction of the electric mo tor po wer
av ailability displ ay(plug-in hybrid) ................ 281
Displaying the po wer me ter (plug-in
hy brid) ........................................................ 282
Overview of displa ysinthe inst rument
display ........................................................ 282
Head-up display .......................................... 282 MBUX multimedia syst MBUX multimedia syst
em
em........................... .285
285
Overview and operation ............................... 285
System settings .......................................... 294
Plug-in hybrid settings ................................ .298
Na vigation .................................................. .299
Te lephone ................................................... 308
Mercedes me app ....................................... 311 Mercedes-Benz emer
gency call system ....... 320
Ra dio & media ............................................ .324
Sound settings ............................................ 329 Maint Maint
enance and car
enance and car e
e................................. 330 330
ASS YST PLUS service inter val display .......... 330
Engine compartment ................................... 331
Cleaning and care ....................................... 337 Br Br
eakdo
eakdo wn assist
wn assist ance
ance................................. 346 346
Emer gency .................................................. 346
Flat tyre ...................................................... 348
Battery (vehicle) .......................................... 354
To w- starting or towing away ........................ 358
Electrical fuses ............................................ 364 Wheels and tyr Wheels and tyr
es
es......................................... 368 368
No tes on noise or unusual handling char-
acteristics ................................................... 368
No tes on regula rly inspecting wheels and
tyres .......................................................... .368
No tes on snow chains ................................. 368
Ty re pressure .............................................. 369 Contents
3 3

#
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

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

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. When
theve hicle is switched o., you can con-
tinue tooperate the side windo ws.
This function is available for around four minutes
or until a front door is opened.
A A ut ut omatic rev
omatic rever
ersing function of t
sing function of t he side windows
he side wind ows
If an obs tacle impedes a side window during the
closing process, the side window will open again
automaticall y.The automatic reve rsing function is
only an aid and is not a substitute foryo ur atten-
tiveness. #
During the closing process, make sure that no
body parts are in the closing area. &
W
WARNING
ARNING Risk of becoming trapped
despite there being reve rsing pr otection
on the side window
The reve rsing function does not react:
R tosoT, light and thin objects, e.g. /n gers.
R during resetting.
The reve rsing function cannot pr event some-
one from becoming trapped in these situa-
tions. #
During the closing process, make sure
th at no body parts are in the closing
area. #
If someone becomes trapped, press the
W button toopen the side window
again. A
A
ut
ut omatic function of t
omatic function of t he side windows
he side wind ows In
thefo llowing cases, the side windo wswill be
closed automatically when theve hicle is switched
o.:
R if it starts torain
Ra in is de tected byara in sensor on the wind-
screen.
R inextreme temp eratures
R aTer a cer tain time (depending on the on-
board electrical system voltage)
R ifth ere is a malfunction in the po wer supply
The side windo wswill be closed as far as theve n-
tilation position. Opening and closing
93
93

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
103 103

&
W
WARNI NG
ARNI NGRisk 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. &
W WARNING
ARNING Risk 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. &
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. 106 106
Seats and st
owing

A
A
djus
djus ting t
ting t he fr
he front seat electr
ont seat electr ically
ically1
Seat backrest inclination
2 Seat height
3 Seat cushion inclination
4 Seat fore -and-aT position #
Save the settings with the memory function
(/ page 115). A
A
djus
djus ting t
ting t he 4-wa
he 4-wa y lumbar support
y lumbar support 1
Higher
2 SoTer
3 Lower
4 Firm er #
Use buttons 1to4 toadjust the contour of
th e backrest. Head r
Head r
es
estrtraints
aints A
A
djus
djus ting t
ting t he fr
he front seat head r
ont seat head r es
estrtraints manually
aints manually &
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. 108
108
Seats and st
owing

#
T
To call up:
o call up: press and brie0y hold one of preset
position buttons 4,TorU.
ATer releasing the button, all systems are
mo ved into the stored position. S
S
t
to
o w
w ag
ag e ar
e ar eas
eas N
No
ot
tes on loading t
es on loading t he v
he vehicle
ehicle &
D
DAN
AN GER
GER Risk of poisoning from exhaust
ga ses
Combustion engines emit poisonous exhaust
ga ses, such as carbon monoxide. Exhaust
ga ses can enter theve hicle interior if theta il-
ga te is open when theve hicle is running,
especially if theve hicle is in motion. #
Always switch o. theve hicle before
opening theta ilgate. #
Never drive with theta ilgate open. &
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. &
W
WARNI NG
ARNI NGRisk of injury due toobjects
being st owed incor rectly
If objects in theve hicle interior are st owed
incor rectl y,they can slide or be thro wn around
and hit vehicle occupants. In addition, cup
holders, open st owage spaces and mobile
phone brac kets cannot alw aysreta in all
objects they contain. There is a
risk of injur y,particular lyin the
eve nt of braking manoeuvres or abrupt
ch anges in direction. #
Always st owobjects so that they cann ot
be thro wn around in such situations. #
Always make sure that objects do not
pr otru de from st owage spaces, lug gage
nets or st owage nets. #
Close the loc kable st owage spaces
before starting a jou rney. #
Stow and secure objects that are heavy,
hard, poin ted, sharp-edged, fragile or too
lar ge inthe load compartment. &
W
WARNING
ARNING Risk of accident from objects in
th e driver's foot we ll and front-passenger
fo ot we ll
Objects in the driver's foot we ll and front-
passenger foot we ll may impede pedal tr avel or
block a depressed pedal.
This jeopardises the operating and road saf ety
of theve hicle. 116 116
Seats and st
owing

Ov
Ov
er
ervie
vie w of climat
w of climat e contr
e control syst
ol systems
ems N
No
ot
tes on climat
es on climat e contr
e control
ol In order
forth e air conditioning system, monitor-
ing of the pollution le vel and air /lt ration tofunc-
tion co rrectl y,an interior air /lter must alw ays be
used. Make sure that the /lter is installed cor-
re ctl y.Use /lters recommended and appr oved by
Mercedes-Benz. Alw ays ha vemaintenance work
car ried out at a quali/ed specialist workshop. Ov
Ov
er
ervie
vie w of t
w of t he air conditioning contr
he air conditioning contr ol panel
ol panel The indicator lamps on
the buttons indicate that
th e cor responding function is activated. THERM
ATIC air conditioning cont rol panel with sta-
tionary heater (e xample)
1 q Setsthete mp erature on the driver's
side
2 Vehicles with THERM ATIC or THERM OTRO NIC
operating unit with stationary heater: A
calls up the air conditioning menu
Ve hicles with THERM OTRO NIC operating unit
without stationary heater: _setsthe air
distribution
3 H Setsthe air0ow or switches o. climate
control
4 Ã Sets climate control toautomatic mode
(/ page 154) 5
¬ Demists the windscreen
6 ¤ Switches there ar wind owheater on/o.
7 g Switches air-recirculation mode on/o.
(/ page 155)
8 Vehicles with THERM ATIC operating unit
(with/wi thout stationary heater):
¿ switches A/C function on/o.
(/ page 154)
Ve hicles with THERM OTRO NIC operating unit
(with/wi thout stationary heater): Á
switches A/C function on/o. (/ page 154)
Switches residual heat on/o. (/ page 155)
9 Vehicles with THERM ATIC or THERM OTRO NIC
control panel with stationary heater: &
swit ches stationary heater on/o.
(/ page 159)
Ve hicles with THERM OTRO NIC operating unit
without stationary heater: 0switches syn-
ch ronisation on/o. (/ page 155)
Plug-in hybrid with THERMATIC or
THERMOTRONIC operating unit: &
switches "Immediate pre-ent ryclimate con-
trol" on/o. (/ page 158) Climate cont
rol
153
153

#
Press and hold button 1,2or3 that you
wish toprog ram.
Indicator lamp 40ashes yello w.
% It can take up to20 seconds before the indi-
cator lamp 0ashes yello w. #
Release the pr eviously pressed button.
Indicator lamp 4continues to0ash yello w. #
Point remo tecont rol5 from a distance of
1 cm to8 cm towa rds button 1,2or3. #
Press and hold button 6ofremo tecont rol
5 until one of thefo llowing signals appears:
R Indicator lamp 4lights up green continu-
ousl y.Prog ramming is comple te.
R Indicator lamp 40ashes green. Prog ram-
ming was successful. Additionall y,syn-
ch ronisation of thero lling code with the
door system must be car ried out. #
If indicator lamp 4does not light up or 0ash
gr een: repeat the procedure. #
Release all of the buttons.
% The remo tecont rolfo rth e door drive is not
included in the scope of delivery of thega rage
door opener.
Sync
Sync hr
hronising t
onising t he r
he rolling code
olling code
R
R eq
eq uir
uir ements:
ements:
R The door system uses a rolling code.
R The vehicle must be within range of thega rage
door or door drive. R
The vehicle as well as persons and objects are
located outside thera nge of mo vement of the
door. #
Press the prog ramming button on the door
drive unit.
Initiate the next step within appr oximately
30 seconds. #
Press pr eviously prog rammed button 1,2
or 3 repeatedly until the door closes.
When the door closes, prog ramming is com-
ple ted.
% Please also read the operating instructions for
th e door drive.
T T r
roubleshoo
oubleshoo ting when pr
ting when progr ogramming t
amming t he r
he remo te
emo te
contr
contr ol
ol #
Check if the transmitter frequency of remo te
cont rol5 is suppor ted. #
Replace the batteries in remo tecont rol5. #
Hold remo tecont rol5 atvarious angles from
a distance of 1 cm to8 cm front of the inside
re arview mir ror.Yo u should test every position
fo r at least 25 seconds before trying ano ther
position. 214
214
Driving and parking