snow chains 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

To
protect against engine overrev ,th e automatic
transmission shiTs up tothe next gear when maxi-
mum engine speed has been reached. Glide mode function
Glide mode function
*
N
NO OTE
TE Mercedes-AMG vehicles #
Obser vethe no tes in the Supplement.
Yo u could otherwise failto recognise
dangers. Wi
th an anticipatory driving st yle, Glide mode
helps youto reduce fuel consum ption.
Glide mode is characterised bythefo llowing:
R The combustion engine is disconnected from
th e driv etra in and continues torun in neutral.
R The transmission position display his sh own
in green.
Glide mode is activated if thefo llowing conditions
are met:
R Drive prog ram ; is selected.
R The speed is within a suitable range. R
The road's course is suitable, e.g. no steep
uphill or downhill inclines or tight bends.
R There is no trailer hitched up tothe trailer
hitch, and no bicycle rack Fitted.
R You do not depress the accelerator or brake
pedal (e xcept for light brake applications).
% Glide mode can also be activated if you ha ve
selected the "Eco" setting forth e drive in the
drive prog ram =.
Glide mode is deactivated again if one of the con-
ditions is no longer met.
V
V ehicles wit ehicles wit h A
h Activ
ctiv e Dist
e Dist ance Assis
ance Assist DIS t DISTR
TRONIC:
ONIC:
when Active Distance Assist DISTRONIC is acti ve,
th e glide mode function is not available.
Glide mode can also be pr evented bythefo llowing
parame ters:
R Incline
R Downhill gradient
R Temp erature
R Height
R Speed
R Operating status of the engine R
Tra1c situation
% Glide mode can be ended bypressing a steer-
ing wheel gearshiT paddle (/ page 185). F
F
unction of t
unction of t he 4MA
he 4MATIC
TIC
4MATIC ensu resth at all four wheels are driven.
To get her with ESP ®
and 4ETS, 4MATIC impr oves
th e traction of your vehicle whene ver a driven
wheel spins due toinsu1cient traction.
If yo ufa ilto adapt your driving style, 4MATIC can
neither reduce therisk of an accident nor override
th e la wsof ph ysics. 4MATIC cannot take account
of road, weather and tra1c conditions. 4MATIC is
only an aid. You are responsible especially for
maintaining a safe distance from theve hicle in
front, forve hicle speed, for braking in good time
and for st aying in lane.
% In wintry road conditions, the maximum e.ect
of 4MATIC can be achie ved only if you use
winter tyres (M+S tyres), with snow chains if
necessar y. Driving and parking
187
187

R
Do not deactivate ESP ®
under any circumstan-
ces.
R Only depress the accelerator pedal as far as is
necessar y.
It may be best todeactivate ESP ®
in thefo llowing
situations:
R When using snow chains.
R In deep sno w.
R On sand or grav el.
% Spinning the wheels results in a cutting
action, which enhances traction.
If th e÷ ESP®
wa rning lamp lights up continu-
ousl y,ESP ®
is not available due toa malfunction.
Obser vethefo llowing information:
R Warning and indicator lamps (/ page 476)
R Display message s (/page 409)
ET
ET S/4ET
S/4ET S (Electr
S (Electr onicTr
onic Traction Syst
action Syst em)
em)
ETS/4ETS traction cont rol is part of ESP ®
and
makes it possible topull away and accelerate on a
slippery car riag ewa y. ETS/4ETS can impr
ovetheve hicle's traction by
inter vening in thefo llowing ways:
R The drive wheels are braked individually if they
spin.
R More drive torque is tr ansferredto the wheel
or wheels with traction.
In0uence
In0uence of dr
of driv
ive pr
e pr ogr
ograms on ESP
ams on ESP ®
®
The drive prog rams enable ESP ®
to adapt todif-
fe re nt we ather and road conditions as well as the
driver's prefer red driving style. Depending on the
selected drive prog ram, the appropriate ESP ®
mode will be activated. You can select the drive
prog rams using theDY NAMIC SELECT switch
(/ page 179). F
F
unction of ESP
unction of ESP ®
®
Cr
Cr osswind Assist
osswind Assist ESP
®
Crosswind Assist de tects sudden gusts of
side wind and helps the driver tokeep theve hicle
in the lane:
R ESP ®
Crosswind Assist is active at vehicle
speeds between appr ox. 75 km/h and
200 km/h when driving straight ahead or cor-
nering slightl y. R
The vehicle is stabilised bymeans of individual
brake application on one side. F F
unction of ESP
unction of ESP ®
®
tr
trailer st
ailer st abilisation
abilisation &
W WARNING ARNING Risk of accident in poor road
and weather conditions
In poor road and weather conditions, the
trailer stabilisation cannot pr event lur ching of
th eve hicle/trailer combination. Trailers with a
high cent reofgrav ity may tip over before
ESP ®
de tects this. #
Always adapt your driving style tosuit
th e cur rent road and weather conditions. When driving with a trailer, ESP
®
can stabilise
yo ur vehicle if the trailer begins toswer vefrom
side toside:
R ESP ®
trailer stabilisation is active abo ve
speeds of 65 km/h.
R Slight swerving is reduced bymeans of a tar-
ge ted, individual brake application on one
side. Driving and parking
223
223

during measurement of
the parking space. These
are also then not take n into account when calcu-
lating the parking procedure. In some circumstan-
ces, Active Parking Assist may therefore guide
yo u into the parking space incor rectl y. &
W
WARNI NG
ARNI NGRisk of accident due toobjects
located abo veor below the de tection
ra nge of Active Parking Assist
If th ere are objects abo veor below the de tec-
tion range, thefo llowing situations may arise:
R Active Parking Assist may steer too ear ly.
R The vehicle may not stop in front of these
objects.
There is a danger of collision! #
Inthese situations, do not use Active
Pa rking Assist. Extreme
weather conditions, such as snow or
heavy rain, may lead toa parking space being
measured inaccuratel y.Pa rking spaces that are
partial lyoccupied bytrailer dr awbars might not be
identi/ed as such or be measured incor rectl y. Only use
Active Parking Assist on le vel, high-g rip
gr ound.
Do not use Active Parking Assist in thefo llowing
situations:
R Inextreme weather conditions such as ice,
pac ked snow or in heavy rain.
R When transporting a load that pr otru des
be yond theve hicle.
R On steep uphill or downhill gradients of more
th an appr oximately 15%.
R When snow chains are /tted.
R When a trailer or bicycle rack is attached.
R Directly aTer a tyre change or when spare
tyres are /tted.
R Ifth e tyre pressure is too low or too high.
R Ifth e suspension is out of alignment, e.g. aTer
bottoming out on a kerb.
Ac tive Parking Assist may also display parking
spaces that are not suitable for parking, such as:
R Parking spaces where parking is prohibited.
R Parking spaces on unsuitable sur faces. P
P ar
ar king wit
king wit h A
h Activ
ctiv e P
e Par
arking Assist
king Assist
% Depending on theve hicle's equipment, the
button may also be located at a di.erent posi-
tion in the centre console. #
Press button 1. 266 266
Driving and parking

N
N
o
ot
tes on noise or unusual handling c
es on noise or unusual handling c har
har act
acter
eris-
is-
tics
tics
Make sure there are no vibrations, noises or
unusual handling characteristics when theve hicle
is in motion. This may indicate that the wheels or
tyres are damaged. Hidden tyre damage could
also be causing the unusual handling characteris-
tics.
If yo u suspect that a tyre is defecti ve,re duce your
speed immediately and ha vethe tyres and wheels
ch ecked at a quali/ed specialist workshop. N No
ot
tes on r
es on r egularl
egularly inspecting wheels and tyr
y inspecting wheels and tyr es
es&
W
WARNING
ARNING Risk of injury due todamaged
tyres
Damaged tyres can cause tyre pressure loss. #
Check the tyres regula rly fo r signs of
damage and replace any damaged tyres
immediatel y. &
W
WARNI NG
ARNI NGRisk of aquaplaning due to
insu1cient tyre tread
Insu1cient tyre tread will result in reduced
tyre grip.
The risk of aquaplaning is increased on wet
ro ads, especially when the speed of theve hi-
cle is not adap tedto suit the conditions. #
Thus, you should regula rly ch eck the
tread dep thand the condition of the
tread across the entire width of all tyres.
Minimum tread dep thfor:
R Summer ty res: 3 mm
R M+S tyres: 4 mm #
For saf etyre asons, replace the tyres
before the legall y-prescribed limit forthe
minimum tread dep thisreached. Car
ryout thefo llowing checks on all wheels regu-
lar ly, at least once a month or as required, for
ex ample, prior toa long jou rney or driving o.-
ro ad:
R Check the tyre pressure (/ page 369). R
Visually inspect wheels and tyres for damage.
R Check theva lve caps.
R Visual check of the tyre tread dep thand the
tyre contact sur face across the entire width.
The minimum tread dep thfor summer tyres is
3 mm and for winter tyres 4 mm. N
No
ot
tes on sno
es on sno w c
w chains
hains &
W
WARNING
ARNING Risk of accident due toincor-
re ctly /tted snow chains
If yo u ha ve/tted snow chains tothere ar
wheels, they may drag against theve hicle
body or chassis components. #
Never /t snow chains on there ar
wheels. #
Only /t snow chains on the front wheels
in pairs. 368
368
Wheels and tyres

*
N
N O
OTE
TE Damage tovehicle body or suspen-
sion components caused by/tted snow
ch ains On 4MATIC
vehicles, if you /t snow chains on
th ere ar wheels, you can damage vehicle body
or suspension components. #
On 4MATIC vehicles, only /t snow chains
on the front wheels. *
N
NO OTE
TE Damage tothe wheel trim from /t-
ted snow chains If snow
chains are /tted tosteel wheels, the
wheel trims can be damaged. #
Remo vethe wheel trims of steel wheels
before /tting snow chains. Obser
vethefo llowing no tes when using snow
ch ains:
R Snow chains are only permissible for cer tain
wheel/tyre combinations. You can obtain
information about this from a Mercedes-Benz
Service Centre. R
For saf etyre asons, only use snow chains that
ha ve been speci/cally appr oved foryo ur vehi-
cle byMercedes-Benz, or snow chains with
th e same quality standard.
R If snow chains are /tted, the maximum per-
missible speed is 50 km/h.
R V
Vehicles wit
ehicles wit h A
h Activ
ctiv e P
e Par
arking Assist
king Assist: :do not use
Ac tive Parking Assist when snow chains are
/tted.
% You can permanently limit the maximum
speed for driving with winter tyres
(/ page 232).
% You can deactivate ESP ®
to pull away
( / page 224). This allo ws the wheels tospin,
achieving an increased driving forc e. T
T
yr
yr e pr
e pr essure
essure N
No
ot
tes on tyr
es on tyr e pr
e pressure
essure &
W
WARNING
ARNING Risk of accident due toinsu1-
cient or excessive tyre pressure
Un derin0a tedorove rin0ated ty res pose in par-
ticular thefo llowing risks:
R The tyres can burst.
R The tyres can wearexcessively and/or
une venly.
R The driving characteristics as well as the
stee ring and braking characteristics may
be greatly impaired. #
Comply with there commended tyre
pressure and check the tyre pressure of
all tyres, including the spare wheel, regu-
lar ly:
R monthly
R when the load changes
R before embarking on a lon ger journey Wheels and tyres
369
369

R
Tyre pressure monitor active :th ete ach-in
process of the system is not yetcomple te. The
tyre pressures are already being monitored. #
Compare the tyre pressure with there com-
mended tyre pressure forth e cur rent ope rat-
ing condition (/ page 370).Additionall y,
obser vethe no tes on cold tyres
(/ page 369).
% The values displa yed in the on-board com-
puter may deviate from those of the tyre pres-
sure gauge as they referto sea le vel.At high
ele vations, the tyre pressure values indicated
by a pressure gauge are higher than those
shown bythe on-board computer. In this case,
do not reduce the tyre pressure.
R
R est
est ar
arting t
ting t he tyr
he tyr e pr
e pressur
essur e monit
e monit or
oring syst
ing syst em
em
R
R eq
eq uir
uir ements:
ements:
R The recommended tyre pressure is cor rectly
set forth ere specti veoperating status on all of
th e wheels (/ page 369).
Re start the tyre pressure monitoring system in the
fo llowing situations:
R The tyre pressure has changed. R
The wheels or tyres ha vebeen changed or
ne wly /tted.
On-board computer: 4 Service 5
Tyres #
Swipe down wards on Touch Control on the
leT-hand side of the steering wheel.
The Use current pressures as new reference
values? message is shown in the Instrument
Displa y. #
Torestart, press Touch Control on the leT-
hand side of the steering wheel.
The Tyre press. monitor restarted message is
shown in the Instrument Displa y.
Cur rent wa rning message s are deleted and
th eye llow h warning lamp goes out.
ATer you ha vebeen driving for a few minutes,
th e system checks whe ther the cur rent tyre
pressures are within the speci/ed range. The
cur rent tyre pressures are then accep ted as
re fere nce values and monitored.
Be sure toalso pay attention tothefo llowing rela-
te dto pic:
R Notes on tyre pressure (/ page 369) T
T
yr
yr e pr
e pr essur
essur e loss w
e loss w ar
arning syst
ning syst em
em F
F
unction of t
unction of t he tyr
he tyre pr
e pressur
essur e loss w
e loss w ar
arning syst
ning syst em
em
The tyre pressure loss warning system warnsthe
driver bymeans of display messages when there
is a se vere tyre pressure loss.
Syst
Syst em limits
em limits
The system may be impaired or may not function
particula rly in thefo llowing situations:
R incor rect refere nce values were ta ught in
R sudden pressure loss caused byafo re ign
object penetrating the tyre, forex ample
R aneven pressure loss on more than one tyre
occurs
The system has a restric ted or dela yed function
particular lyin thefo llowing situations:
R poor ground conditions, e.g. snow or grav el
R driving with snow chains
R when adopting a very sporty driving st yle with
high cornering speeds or sudden acceleration
R driving with a very heavy or lar getrailer
R driving with a high load 372
372
Wheels and tyres

#
Never /t more than one emer gency
spa rewheel or spare wheel that di.ers
in size. #
Only use an emer gency spa rewheel or
spare wheel brie0y. #
Do not deacti vate ESP ®
. #
Have the emer gency spa rewheel or
spare wheel of a di.erent size replaced
at the nearest quali/ed specialist work-
shop. The new wheel must ha vethe cor-
re ct dimensions. %
The emer gency spa rewheel is secured in the
emer gency spa rewheel bag in the load com-
partment.
Obser vethefo llowing no tes on removing an emer-
ge ncy spa rewheel:
R Before st owing the emer gency spa rewheel,
make sure there is no air leT in the tyre.
If necessar y,allow the air toescape.
R T
T o r
o r elease air fr
elease air fr om t
om the tyr
he tyr e:
e:remo vetheva lve
cap of the tyre. R
Press down the me tal insert in theva lve using
a pointed object, e.g. a pen.
R Screw theva lve cap onto theva lve.
Obser vethefo llowing no tes on /tting an emer-
ge ncy spa rewheel:
R The maximum permissible speed with an
emer gency spa rewheel /tted is 80 km/h.
R Do not /t the emer gency spa rewheel with
snow chains.
R Replace the emer gency spa rewheel aTer six
ye ars at the latest, rega rdless of wear.
R Check the tyre pressure of the emer gency
spa rewheel /tted. Cor rect the pressure as
necessar y.
% The speci/ed tyre pressure is stated on the
label of the emer gency spa rewheel.
% V
V ehicles wit
ehicles wit h a tyr
h a tyre pr
e pressur
essur e loss w
e loss w ar
arning
ning
syst
syst em:
em: if an emer gency spa rewheel is /tted,
th e tyre pressure loss warning system cannot
function reliabl y.Only restart the system
again when the emer gency spa rewheel has
been replaced with a new wheel. V
V
ehicles wit
ehicles wit h a tyr
h a tyre pr
e pressur
essur e monit
e monit or
or ing sy
ing sy s-
s-
t
t em:
em: if an emer gency spa rewheel is /tted, the
tyre pressure monitoring system cannot func-
tion reliabl y.Fo r a few minutes aTer an emer-
ge ncy spa rewheel is /tted, the system may
still display the tyre pressure of there mo ved
wheel. Only restart the system again when the
emer gency spa rewheel has been replaced
with a new wheel.
Be sure toalso obser vethefo llowing fur ther rela-
te d subjects:
R Notes on tyre pressure (/ page 369)
R Tyre pressure table (/ page 370)
R Notes on /tting tyres (/ page 373)
R Fitting an emer gency spa rewheel
(/ page 378) 384 384
Wheels and tyres

6
until the cor rect tyre pressure has been
re ached. #
Unscr ewunion nut 2of /ller hose 1from
th eva lve. #
Screw theva lve cap of the emer gency spa re
wheel onto theva lve again. #
Stow /ller hose 1and plug 3inthe lo wer
section of the tyre in0ation compressor hous-
ing. #
Stow the tyre in0ation compressor in theve hi-
cle. Collapsible spar
Collapsible spar
e wheel
e wheelN
No
ot
tes on t
es on t he collapsible spar
he collapsible spar e wheel
e wheel&
W
WARNING
ARNING Risk of accident caused by
incor rect wheel and tyre dimensions
The wheel or tyre size and the tyre type of the
emer gency spa rewheel or spare wheel and
th e wheel tobe replaced may di.er. The emer-
ge ncy spa rewheel or spare wheel can signi/-
cantly impair driving characteristics of the
ve hicle. To
prev ent hazardous situations: #
Drive carefull y. #
Never /t more than one emer gency
spa rewheel or spare wheel that di.ers
in size. #
Only use an emer gency spa rewheel or
spare wheel brie0y. #
Do not deacti vate ESP ®
. #
Have the emer gency spa rewheel or
spare wheel of a di.erent size replaced
at the nearest quali/ed specialist work-
shop. The new wheel must ha vethe cor-
re ct dimensions. %
The collapsible spare wheel is secured in the
collapsible spare wheel bag in the load com-
partment.
% The collapsible spare wheel is only available in
cer tain countries.
Obser vethefo llowing no tes on /tting an emer-
ge ncy spa rewheel:
R The collapsible spare wheel is an emer gency
spa rewheel which is only suitable for use for a limited period of time and in a
restric ted man-
ner in theev ent of a 0at tyre (e.g. until the
nearest workshop).
R The tyre side walls are folded when in trans-
port mode. Before using the collapsible spare
wheel, in0ate it using the accompanying com-
pressor.
R Check the tyre pressure of the collapsible
spare wheel once /t tedand, if necessar y,
adjust.
R The maximum permissible speed with a col-
lapsible spare wheel /tted is 80 km/h.
R Do not /t the collapsible spare wheel with
snow chains.
R Replace the collapsible spare wheel aTer six
ye ars at the latest, rega rdless of wear.
% V
Vehicles wit
ehicles wit h a tyr
h a tyre pr
e pressur
essur e loss w
e loss w ar
arning
ning
syst
syst em:
em: if a collapsible spare wheel is /tted,
th e tyre pressure loss warning system cannot
function reliabl y.Only restart the system
again when the collapsible spare wheel has
been replaced with a new wheel. 386
386
Wheels and tyres

MOEx
tended tyres................................. 348
Noise..................................................... 368
No tes on /tting...................................... 373
Re moving............................................... 381
Re placing...................................... .373, 378
Re placing the wheel trim........................ 378
Re starting the tyre pressure loss
wa rning system...................................... 373
Re starting the tyre pressure monitor-
ing system............................................. 372
Selection...............................................3 73
Snow chains.......................................... 368
St oring................................................... 377
TIREFIT kit.............................................. 350
Ty re pressure (No tes)............................. 369
Ty re pressure loss warning system
(function)............................................... 372
Ty re pressure monitoring system
(function)............................................... 371
Ty re pressure table................................ .370
Unusual handling characteristics............ 368 U U
U
Unloc nloc king
king
see Locking/unlocking U
Updat
pdat es
es
Impor tant system updates...................... 294
USB port
USB port Front st owage compartmen t.................. 119
Re ar....................................................... 130 V
V
V
V ehicle
ehicle
Activating/deactivating standby mode... 219
Ad ditional door loc k................................. 86
Cor rect use............................................. .40
Data acquisition....................................... 42
Data storag e............................................ 42
Diagnostics connection............................ 39
Equipment............................................... 26
Implied warrant y...................................... 42
Locking (automatically)............................ 88
Locking/unlocking (emer gency key)........ .89
Locking/unlocking (from inside)............... 87
Locking/unlocking (KEYLESS-GO)............ 87
Lo we ring................................................ 382
Medical aids........................................... .41
Pa rking up............................................. 218
QR code rescue car d............................... 42
Quali/ed specialist workshop.................. .40Ra
ising................................................... 379
REACH regulation.................................... 41
Re gistration............................................. 40
Setting collision de tection (par ked
ve hicle).................................................. 218
St andby mode function.......................... 218
St arting (emer gency ope ration mode ).... 166
St arting (Remo teOnline)........................ 168
St arting (start/stop but ton)................... 166
SV HC (substances of very high conce rn)..41
Switching o. (start/stop button)............ 211
Switching on (start/stop button)............ 165
To wing................................................... 276
Ve ntilating (con venience opening)........... .94
V
V ehicle batt ehicle batt ery
ery
see On-board electrical system battery (12 V)
V
V ehicle camera
ehicle camera
Information............................................ 220
V
V ehicle data
ehicle data
Displaying (DYNAMIC SELECT)............... 181
Roof load............................................... 404
Ve hicle height....................................... .403
Ve hicle length........................................ 403
Ve hicle widt h......................................... 403
Wheelbase............................................. 403 524 524
Index