MERCEDES-BENZ A-CLASS HATCHBACK 2021 Owners Manual

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
if operating conditions change, e.g. o.-
ro ad driving #
Adjust the tyre pressure, if necessar y.Ty
re pressure which is too high or too low can:
R Shor tenth e service life of the tyres.
R Cause increased tyre damage.
R Adve rsely a.ect driving characteristics and
th us driving saf ety, e.g. due toaquaplaning. &
W
WARNING
ARNING Risk of accident due torepea-
te d pressure drop in the tyres
The wheels, valves or tyres could be damaged.
To o low a tyre pressure can lead tothe tyres
bursting. #
Examine the tyres forfo re ign objects. #
Check whe ther the tyre has a puncture
or theva lve has a leak. #
Ifyo u are unable torectify the damage,
contact a quali/ed specialist workshop. Information on
there commended tyre pressure
fo rth eve hicle's factor y-/tted tyres can be found
on the tyre pressure table on the inside of the fuel
/ller 0ap (/ page 370).
Use a suitable pressure gauge tocheck the tyre
pressure. The outer appearance of a tyre does not
permit any reliable conclusion about the tyre pres-
sure.
Only cor rect tyre pressures when the tyres are
cold. Conditions for cold tyres:
R The vehicle has been par ked with the tyres out
of direct sunlight for at least thre e hours.
R The vehicle has tr avelled less than 1.6 km.
The vehicle's tyres heat up when driving. As the
te mp erature of the tyres increases, so too does
th e tyre pressure.
V
V ehicles wit ehicles wit h a tyr
h a tyre pr
e pressur
essur e monit
e monit or
oring syst
ing syst em:
em:
yo u can also check the tyre pressure using the
on-board computer.
Not
Not es on tr
es on tr ailer oper
ailer oper ation
ation
Alw ays in0ate there ar axle tyres tothere com-
mended tyre pressures on the tyre pressure table
fo r increased load. T
T
yr
yr e pr
e pr essur
essur e t
e table
able The tyre pressure
table is on the inside of the fuel
/ller 0ap. The tyre pressure
table sho ws there commended
tyre pressure for all tyres appr ovedfo rth is vehi-
cle. The recommended tyre pressures apply for
cold tyres under various operating conditions, i.e.
loading and/or speed of theve hicle. 370
370
Wheels and tyres

If one or more tyre sizes precede a tyre pressure,
th efo llowing tyre pressure information is only
va lid forth ose tyre sizes and their respecti veload
condition.
If th e preceding tyre sizes are complemented by
th e+ symbol, the tyre pressure information
fo llowing sho wsalternative tyre pressures. Fuel
consum ption may then increase slightl y.
The load conditions "pa rtially laden" and "fully
laden" are de/ned in theta ble for di.erent num-
bers of passengers and amounts of luggage. The
actual number of seats may di.er from this. T T
yr
yr e pr
e pr essur
essur e monit
e monit or
oring syst
ing syst em
em F
F
unction of t
unction of t he tyr
he tyre pr
e pressur
essur e monit
e monit or
oring syst
ing syst em
em
The system checks the tyre pressure and the tyre
te mp erature of the tyres /t tedtotheve hicle by
means of a tyre pressure sensor.
The tyre pressure and the tyre temp erature
appear in the on-board computer (/ page 371).
If th ere is a substantial pressure loss or if the tyre
te mp erature is excessive, you will be warned with
display messages (/ page 466) ortheh wa
rning lamp in the inst rument cluster
(/ page 490).
The tyre pressure monitoring system is only an
aid. It is the driver's responsibility toset the tyre
pressure tothere commended cold tyre pressure
suitable forth e operating situation.
In most cases, the tyre pressure monitoring sys-
te m will automatically update the new refere nce
va lues aTer you ha vechanged the tyre pressure.
Yo u can, ho wever, also update there fere nce val-
ues byrestarting the tyre pressure monitoring
system manually (/ page 372).
Syst
Syst em limits em limits
The system may be impaired or may not function
particular lyin 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 there is a malfunction caused byano ther radio
signal source Chec Chec
king t king t he tyr
he tyr e pr
e pressur
essur e wit
e with t
h the tyr
he tyr e pr
e pressure
essure
monit
monit or
oring sy
ing sy st
stem
em
R
R eq
eq uir
uir ements:
ements:
R The vehicle is switched on.
On-board computer: 4 Service 5
Tyres
One of thefo llowing displa ysappears:
R Current tyre pressure and tyre temp erature of
th e individual wheels: R
Tyre pressures will be displayed after a few
minutes of driving Wheels and tyres
371 371

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

The tyre pressure loss
warning system is only an
aid. It is the driver's responsibility toset the tyre
pressure tothere commended cold tyre pressure
suitable forth e operating situation and tocheck
it.
Be sure toalso obser vethefo llowing fur ther rela-
te d subjects:
R Notes on tyre pressure (/ page 369)
R Displ aymessages about the tyres
(/ page 466)
R
R est est ar
arting t
ting t he tyr
he tyr e pr
e pressur
essur e loss w
e loss w ar
arning syst
ning 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
wheels.
Re start the tyre pressure loss warning system in
th efo 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 Run Flat Indicator active Restart mes-
sage is shown in the displa y. #
Tobegin restart, press Touch Control on the
leT-hand side of the steering wheel.
The Tyre pressure now OK? message is
shown in the displa y. #
Select Yes. #
Tocon/rm restart, press Touch Control on the
leT-hand side of the steering wheel.
The Run Flat Indicator restarted message is
shown in the displa y.
ATer you ha vedriven for a few minutes, the
tyre pressure loss warning system monitors
th e set tyre pressures of all the tyres.
Be sure toalso pay attention tothefo llowing rela-
te dto pic:
R Notes on tyre pressure (/ page 369) Wheel c
Wheel c
hange
hange N
No
ot
tes on selecting,
es on selecting, /tting
/ttingand r
and replacing tyr
eplacing tyr es
es *
N
NOOTE
TE Mercedes-AMG vehicles #
Obser vethe no tes in the Supplement.
Yo u could otherwise failto recognise
dangers. &
W
WARNING
ARNING Risk of accident due toincor-
re ct wheel and tyre dimensions
If wheels and tyres of the wrong size are /t ted,
th e service brakes or components in the brake
system and in the wheel suspension may be
damaged. #
Alwaysre place wheels and tyres with
th ose that ful/l the speci/cations of the
original part.
Fo r wheels, pay attention tothefo llowing:
R Designation
R Type Wheels and tyres
373
373

Fo
r tyres, pay attention tothefo llowing:
R Designation
R Manufacturer
R Type &
W
WARNING
ARNING Risk of inju rythro ugh exceed-
ing the speci/ed tyre load-bearing capa-
city or the permissible speed rating
Exceeding the load-bearing capacity of the
tyres can lead totyre damage and could cause
th e tyres toexplode. #
Therefore, only use tyre types and sizes
appr ovedfo ryo ur vehicle model. #
Obser vethe tyre load-bearing capacity
ra ting and speed rating requ ired foryo ur
ve hicle. *
N NOOTE
TE Vehicle and tyre damage caused by
non-appro ved tyre types and sizes Fo
r saf etyre asons, only use tyres, wheels and
accessories which ha vebeen specially
appr oved byMercedes-Benz foryo ur vehicle.
These tyres are special lyadap tedto the active
saf ety sy stems, su chas ABS, ESP ®
and
4MATIC, and mar ked as follo ws:
R MO = Mercedes-Benz Original
R MOE = Mercedes-Benz Original Ex tended
(run-0at tyres only for cer tain wheels)
R MO1 = Mercedes-Benz Original (only cer-
ta in AMG tyres)
Otherwise, cer tain properties, such as han-
dling characteristics, vehicle noise emissions,
consu mption, etc. could be adversely a.ec-
te d. Furthermore, other tyre sizes could result
in the tyres rubbing against the body and axle
components when loaded. This could result in
damage tothe tyre or theve hicle. Only use tyres, wheels and accessories
that
ha ve been checked and recommended by
Mercedes-Benz. *
N
NOOTE
TE Risk todriving saf ety from retrea-
ded tyres Re
treaded tyres are neither tested nor recom-
mended byMercedes-Benz, since pr evious
damage cannot alw ays be de tected on retrea-
ded tyres.
Fo rth is reason driving saf ety cann otbe guar-
anteed. #
Do not use used tyres if you ha veno
information about their pr evious usage. *
N NOOTE
TE Possible wheel and tyre damage
when driving over obstacles Lar
gewheels ha vea smaller section width. As
th e section width decreases, therisk of
wheels and tyres being damaged when driving
ov er obstacles increases. 374 374
Wheels and tyres

#
Avoid obstacles or drive especially care-
full y. #
Reduce your speed when driving over
ke rbs, speed bumps, manhole co vers
and po tholes. #
Avoid particular lyhigh kerbs. *
N
NO OTE
TE Possible wheel and tyre damage
when parking on kerbs or in po tholes Pa
rking on kerbs or in po tholes may damage
th e wheels and tyres. #
If possible, park only on 0at sur faces. #
Avoid kerbs and po tholes when parking. *
N
NO OTE
TE Damage toelectronic component
parts due tothe use of ty re-/tting tools V
V
ehicles wit
ehicles wit h tyr
h tyr e pr
e pressur
essur e monit
e monit or
or ing sy
ing sy s-
s-
t
t em:
em: there are electronic component parts in
th e wheel.
If ty re-/tting tools are positioned in the area of
th eva lve, the electronic components could be
damaged. #
Tyre-/tting tools should not be applied in
th e area of theva lve. #
Always ha vetyres changed at a quali/ed
specialist workshop. *
N
NOOTE
TE Damage tosummer tyres at low
ambient temp eratures At
low ambient temp eratures, tears could form
when driving with summer tyres, causing per-
manent damage tothe tyre. #
Attemp eratures below 7 °C use i
M+S tyres. Ac
cessory parts which are not appr oved foryo ur
ve hicle byMercedes-Benz, or which are not used
cor rectl y,can impair the operating saf ety.
Before purchasing and using non-appro ved acces-
sories, visit a quali/ed specialist workshop and
enquire about:
R Suitability
R Legal stipulations
R Factory recommendations &
W WARNING
ARNING Risk of accident with high per-
fo rm ance tyres
The special tyre tread in combination with the
optimised tyre compound means that therisk
of skidding and hydroplaning on wetro ads is
increased.
In addition, the tyre grip is greatly reduced at
a low outside temp erature and tyre running
te mp erature. #
Switch on the ESP ®
and adapt your driv-
ing style accordingl y. #
Use i M+S tyres at outside temp era-
tures of less than 10 °C. #
Only use the tyres forth eir intended pur-
pose. Obser
vethefo llowing when selecting, /tting and
re placing tyres:
R Countr y-speci/c requ irements for tyre
appr oval that de/ne a speci/c tyre type for
yo ur vehicle. Wheels and tyres
375 375

R
Furthermore, the use of cer tain tyre types in
cer tain regions and areas of operation can be
high lybene/cial.
R Only use tyres and wheels of the same type
(summer tyres, winter tyres, MOExtended
tyres) and the same make.
R Only /t wheels of the same size on one axle
(leT and right).
It is only permissible to/t a di.e rent wheel
size in theev ent of a 0at tyre in order todrive
to the specialist workshop.
R Do not make any modi/cations tothe brake
system, the wheels or the tyres.
The use of shims or brake dust shields is not
permitted and may in validate theve hicle's
ge neral ope rating permit.
R 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: all /t tedwheels must be equipped with
functioning sensors forth e tyre pressure mon-
itoring system.
R Attemp eratures below 7 °C use winter tyres
or all-season tyres mar kedi M+Sfor all
wheels. Wi
nter tyres pr ovide the best possible grip in
wintry road conditions.
R For M+S tyres, only use tyres with the same
tread.
R Obser vethe maximum permissible speed for
th e M+S tyres /t ted.
If th e tyre's maximum speed is below that of
th eve hicle, this must be indicated byan
appropriate label in the driver's /eld of vision.
R Run in new tyres at moderate speeds forthe
/r st 100 km.
R Replace the tyres aTer six years at the latest,
re ga rdless of wear.
R When r
When r eplacing wit
eplacing wit h tyr
h tyres t
es that do no
hat do no t f
t featur
eatur e
e
r
r un-0at
un-0at c
char
har act
act er
er is
istics:
tics: vehicles with
MOExtended tyres are not equipped with a
TIREFIT kit at thefa ctor y.Equip theve hicle
with a TIREFIT kit aTer replacing with tyres
th at do not feature run-0at characteristics,
e.g. winter tyres.
% You can permanently limit the maximum
speed for driving with winter tyres
(/ page 232). Fo
r more information on wheels and tyres, con-
ta ct a quali/ed specialist workshop.
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 the emer gency spa rewheel
(/ page 383) N
No
ot
tes on int
es on int erc
erchanging wheels
hanging wheels &
W
WARNING
ARNING Risk of injury thro ugh di.erent
wheel sizes
Inter changing the front and rear wheels can
se verely impair the driving characteristics.
The disk brakes or wheel suspension compo-
nents may also be damaged. #
Only inter change the front and rear
wheels if the wheels and tyres ha vethe
same dimensions. 376
376
Wheels and tyres

Inter
changing the front and rear wheels if the
wheels or tyres ha vedi.erent dimensions can
re nder thege neral ope rating permit in valid.
The wear patterns on the front and rear wheels
di.er:
R front wheels wear more on the tyre shoulder
R rear wheels wear more in the centre of the
tyre
Do not drive with tyres that ha vetoo little tread
dep th. This signi/cantly reduces traction on wet
ro ads (aquaplaning).
On vehicles with the same front and rear wheel
size, you can inter change the wheels every
5,000 to10,000 km, depending on thewe ar.
Ensu rethe direction of rotation is maintained for
th e wheels.
Obser vethe inst ructions and saf ety no tes on
"Changing a wheel" when doing so (/ page 378). N
No
ot
tes on st
es on st or
oring wheels
ing wheels When storing wheels, obser
vethefo llowing no tes:
R ATer removing wheels, store them in a cool,
dry and preferably dark place.
R Protect the tyres from contact with oil, grease
or fuel. Ov
Ov
er
ervie
vie w of t
w of t he tyr
he tyr e-c
e-chang
hang e t
e tool kit
ool kit *
N
NOOTE
TE Mercedes-AMG vehicles #
Obser vethe no tes in the Supplement.
Yo u could otherwise failto recognise
dangers. Apart from some countr
y-speci/c variants, vehi-
cles are not equipped with a tyre-change tool kit.
Fo r more information on which tyre-changing
to ols are requ ired and appr ovedfo r per form ing a
wheel change on your vehicle, consult a quali/ed
specialist workshop.
Yo ure qu ire thefo llowing tools, forex ample, to
ch ange a wheel:
R Jack R
Chock
R Wheel wrench
R Centring pin
% The jack weighs appr oximately 3.4 kg.
The maximum load capacity of the jack can
be found on the stic ker a1xed tothe jac k.
The jack is maintenance-free. If there is a
malfunction, please contact a quali/ed spe-
cialist workshop.
The tyre-change tool kit is located in tool bag 1
in the load compartment.
% Depending on theve hicle equipment, theto ol
bag may be located in other positions in the
load compartment. Wheels and tyres
377
377