wheel MERCEDES-BENZ A-CLASS HATCHBACK 2021 Repair Manual

Seat belts
Seat belts
R Clean wi thluk ewa rmand soapy water.
R Do not use chemical cleaning agents.
R Do not dry byheating them toove r 80°C or
ex posing them todirect sunlight.
Display
Display
R Switch o. the display and let it cool down.
R Clean the sur face carefully with a micro/bre
clo thand a suitable displ aycare product (TFT-
LC D).
R Do not use any other agents.
Head-up displ ay
Head-up display
R Clean with a soT, non-static, lint-free clo th.
R Do not use cleaning agents.
Plas
Plastic tr tic tr im
im
R Clean with a damp micro/bre clo th.
R For heavy soiling: Use a cleaner recommen-
ded for Mercedes-Benz.
R Do not attach stic kers, /lms or similar materi-
als. R
Do not allow cosmetics, insect repellent or
sun cream tocome in contact with the plastic
trim.
R
R eal w
eal w ood and tr
ood and tr im elements
im elements
R Clean with a micro/bre clo th.
R Blackpiano-lacquer look: Clean with a damp
clo thand soapy water.
R For heavy soiling: Use a cleaner recommen-
ded for Mercedes-Benz.
R Do not use sol vent-based cleaning agents, pol-
ishes or waxes.
R
R oof lining
oof lining
R Clean with a brush or dry shampoo.
Car
Car pet
pet
R Use a carpet and textile cleaning agent recom-
mended for Mercedes-Benz.
St
St eer
eer ing wheel made of g
ing wheel made of g enuine leat
enuine leather or DINA-
her or DINA-
MICA
MICA
* NO
NOTE
TEDamage caused bywrong cleaners #
Do not use sol vent-based cleaning
agents such as tarre mo ver or wheel cleaner; neither should
you use polishes
or wa xes. Otherwise you may damage
th e /nish. R
Clean with a damp clo thand 1% soapy water
solution and then wipe with a dry clo th.
R For heavy soiling: Use a cleaner recommen-
ded for Mercedes-Benz.
R Leather care: Use a leather care agent that
has been recommended for Mercedes-Benz.
R Do not allow the leather tobecome too damp.
R Do not use a micro/bre clo th.
% Leather is a natural product. It has natural
surface properties, such as di.erences in
st ru cture, mar kscaused bygrow thand injury
or subtle colour di.erences. These sur face
properties are characteristics of leather and
not material faults. What's more, leather is
subject toa natural ageing process during
which the sur face properties change.
Genuine leat
Genuine leat her seat cov
her seat cov ers ers
R Clean with a damp clo thand then wipe with a
dry clo th. 344
344
Maintenance and care

#
LeT-hand
LeT-hand dr
driv
ive v
e v ehicle:
ehicle: pulltab1 upwards. #
Right-hand dr
Right-hand dr iv
ive v
e v ehicle:
ehicle: pulltab1 down-
wa rds. #
Remo ve/re extinguisher 2. Flat tyre
Flat tyre
N
No
ot
tes on
es on 0at
0attyr
tyr es
es &
W
WARNING
ARNING Risk of accident due toa 0at
tyre
A 0at tyre se verely a.ects the driving charac-
te ristics as well as the steering and braking of
th eve hicle. T
T
yr
yr es wit
es wit hout
houtr
run-0at
un-0at c
char
har act
acter
eristics:
istics: #
Do not drive with a 0at tyre. #
Change the 0at tyre immediately with an
emer gency spa rewheel or spare wheel.
Alternativel y,consult a quali/ed special-
ist workshop.
T
T yr
yr es wit
es wit h
hr
run-0at
un-0at c
char
har act
acter
eris
istics:
tics: #
Obser vethe information and warning
no tes on MOExtended tyres (run-0at
tyres). In
theev ent of a 0at tyre, thefo llowing options are
av ailable depending on your vehicle's equipment:
R V
Vehicles wit
ehicles with MOExt h MOExtended tyr
ended tyr es:
es:it is possible
to continue the journey for a short period of
time. Make sure you obser vethe no tes on
MOExtended tyres (run-0at tyres)
(/ page 348).
R V Vehicles wit
ehicles wit h a TIREFIT kit:
h a TIREFIT kit: you can repair the
tyre so that it is possible tocontinue the jour-
ney for a short period of time. Todo this, use
th e TIREFIT kit (/ page 350). R
V
Vehicles wit
ehicles wit h Mer
h Mercedes me connect:
cedes me connect: you can
make a call for breakdown assistance via the
ove rhead control panel in the case of a break-
down (/ page 311).
R All v
All v ehicles:
ehicles: change the wheel (/ page 378). N
No
ot
tes on MOExt
es on MOExt ended tyr
ended tyres
es(r
(run-0at
un-0at tyr
tyres)
es) &
W
WARNING
ARNING Risk of accident when driving in
limp-home mode
Driving in emer gency mode impai rsthe han-
dling characteristics of theve hicle. #
Do not exceed the permissible maximum
speed of the MOExtended tyres. #
Avoid any abrupt steering and driving
manoeuvres as well as driving over
obstacles (kerbs, pot holes, o.-road).
This applies, in particular, toa loaded
ve hicle. #
Stop driving in the emer gency mode if
yo u notice:
R banging noise 348 348
Breakdown assistance

Depending on
theve hicle version, the TIREFIT kit
may also be located in other places under the
load compartment 0oor.
% You can /nd information on the po wer cate-
gory (LK) and/or electrical data on the back
of the tyre in0ation compressor:
R LK2 – 12 V/15 A,180 W,0.8 kg
At a dis tance of app roximately 1 m tothe tyre
in0ation compressor and appr oximately 1.6 m
abo vethegr ound, thefo llowing sound pres-
sure le vels appl y:
R Emission sound pressure le vel L
PA 83 dB
(A)
R Sound po wer le vel L
WA 91 dB (A)
The tyre in0ation compressor is maintenance-
free. If there is a malfunction, please contact
a qu ali/ed specialist workshop. S
S
t
tor
or ag
ag e location of t
e location of t he TIREFIT kit (plug-in h
he TIREFIT kit (plug-in h ybr
ybrid)
id) The TIREFIT kit is located under
the load compart-
ment 0oor. %
You can /nd information on the po wer cate-
gory (LK) and/or electrical data on the back
of the tyre in0ation compressor:
R LK2 – 12 V/15 A,180 W,0.8 kg
At a dis tance of app roximately 1 m tothe tyre
in0ation compressor and appr oximately 1.6 m
abo vethegr ound, thefo llowing sound pres-
sure le vels appl y:
R Emission sound pressure le vel L
PA
83 dB(A)
R Sound po wer le vel L
WA 91 dB(A)
The tyre in0ation compressor is maintenance-
free. If there is a malfunction, please contact
a qu ali/ed specialist workshop. Using t
Using t
he TIREFIT kit
he TIREFIT kit R
R
eq
eq uir
uir ements:
ements:
R Tyre sealant bottle and tyre in0ation compres-
sor (/ page 350, 349)
R TIREFIT stic ker
R Gloves Yo
u can use TIREFIT tyre sealant toseal per fora-
tion damage of up to4 mm, particular lythose in
th e tyre contact sur face. You can use TIREFIT in
outside temp eratures down to-20 °C. &
W
WARNING
ARNING Risk of accident when using
tyre sealant
The tyre sealant may be unable toseal the
tyre proper ly, especially in thefo llowing cases:
R there are lar gecuts or punctures in the
tyre (la rger than damage pr eviously men-
tioned)
R the wheel rims ha vebeen damaged
R aTer journe yswith very low tyre pressure
or with 0at tyres #
Do not continue driving. #
Consult a quali/ed specialist workshop. &
W WARNING
ARNING Risk of injury and poisoning
from tyre sealant
Ty re sealant is hazardous tohealth and causes
ir rita tion. Do not allow it tocome into contact 350 350
Breakdown assistance

with
your skin, eyes or clo thing, and do not
swallow it. Do not inhale any vapours. Keep
th e tyre sealant away from children.
Obser vethefo llowing if you come into contact
with the tyre sealant: #
Rinse o. the tyre sealant from your skin
using water immediatel y. #
If tyre sealant gets into your eyes, thor-
oughly rinse them using clean water
immediatel y. #
If tyre sealant has been swallo wed,thor-
oughly rinse out your mouth immediately
and drink plenty of water. Do not induce
vo miting and seek medical attention
immediatel y. #
Change out of clo thing which has come
into contact with tyre sealant immedi-
atel y. #
If an alle rgic reaction occurs, seek medi-
cal attention immediatel y. *
N NO
OTE
TE Overheating due tothe tyre in0ation
compressor running too long #
Do not runth e tyre in0ation compressor
fo r longer than ten minutes without inter-
ru ption. Comply with
the manufacturer's saf ety no tes on
th e stic ker on the tyre in0ation compressor.
Ha ve the tyre sealant bottle replaced in a quali/ed
specialist workshop every /ve years. #
Do not remo veany fore ign objects which ha ve
entered the tyre. #
A1x part 1ofthe TIREFIT stic kerto the
inst rument cluster within the driver's /eld of
vision. #
A1x part 2ofthe TIREFIT stic ker near the
va lve on the wheel with the defective tyre. #
Pull plug 4with the cable and hose 5out
of the tyre in0ation compressor housing. Breakdown assistance
351
351

sumer on
your ow nve hicle, e.g. there ar win-
dow heater or lighting.
When the starting assistance/charging process is
comple te: #
Firs t, re mo vethe jump lead/charging cable
from ear thpoint 3and the negative pole of
th e donor batter y,then from positive clamp
2 and the positive pole of the donor batter y.
Begin ea chtime with the contacts on your
ow nve hicle /rst. #
ATer removing the jump lead/charging cable,
close co ver1 of positive clamp 2.
Plug-in h
Plug-in h ybr
ybrid:
id:ifyo ur vehicle has been star ted
with starting assis tance, it may not be possible to
use the electric drive for appr oximately 30
minutes.
Fu rther information can be obtained at a quali/ed
specialist workshop. R R
eplacing t
eplacing t he 12 V batt
he 12 V batt ery
ery #
Obser vethe no tes on the 12 V battery
(/ page 354). Mercedes-Benz
recommends that you ha vethe
12 V battery replaced at a quali/ed specialist
wo rkshop, e.g. at a Mercedes-Benz Se rvice
Centre.
Obser vethefo llowing no tes if youwa nttoreplace
th e battery yourself:
R Alwaysre place a faulty battery with a battery
which meets the speci/c vehicle requ ire-
ments.
The vehicle is equipped with a 0eece batter y.
Fu llve hicle functionality is only guaranteed
with a 0eece batter y.Fo r saf etyre asons,
Mercedes-Benz recommends that you only
use batteries which ha vebeen tested and
appro vedfo ryo ur vehicle byMercedes-Benz.
R Use de tach able parts such as vent hoses,
elbow /ttings or term inal co vers from the bat-
te ry which is tobe replaced.
R Make sure that theve nt hose is alw ays con-
nected tothe original opening on the side of
th e batter y.
Fi t any existing or supplied cell caps.
Otherwise, gases or battery acid could
escape. R
Make sure that de tach able parts are recon-
nected in the same way. T T
o
o w
w -st
-st ar
arting or to
ting or towing away
wing away P
P
er
er mitt
mitt edto
ed towing met
wing met hods (non plug-in h
hods (non plug-in h ybr
ybrid)
id) Mercedes-Benz
recommends transporting your
ve hicle in the case of a breakdown, rather than
to wing it away.
Fo rto wing, use a tow rope or tow bar with bo th
axles on thegr ound. Do not use tow bar systems. &
W
WARNING
ARNING Risk of accident when towing
with steering wheel lock
If th e steering wheel lock is engaged, you will
not be able tosteer theve hicle. #
When towing with a tow rope or tow bar,
alw ays switch on theve hicle. *
N NOOTE TE Damage totheve hicle due to tow-
ing awa y incor rectly #
Obser vethe inst ructions and no tes on
to wing away. 358 358
Breakdown assistance

P
P
er
er mitt
mitt edto
ed towing met
wing met hods
hods V
V
ehicle eq
ehicle eq uipment/to
uipment/to wing met
wing method
hod Bot
Bot
h axles on t
h axles on t hegr
he ground
ound F
F
r
ront axle r
ont axle r aised
aised R
R
ear axle r
ear axle r aised
aised
Plug-in hybrid vehicles Yes, maximum 50 km at 50 km/h Yes, maximum 50 km at 50 km/h Yes, maximum 50 km at 50 km/h
The steering wheel must be /xed in
th e centre position with a steering
wheel loc k. In
thefo llowing situations, only transporting the
ve hicle is permitted:
R the multifunction display is not working
or
R theá Towing not permitted See Owner's
Manual display message appears
Ex Ex cep
cep tion:
tion: ifth eve hicle is located in a danger
zone, it can be reco vered from the danger zone
despite the display message or the display not
wo rking. It must not be
towe d fur ther than 50 m with bo th
axles on thegr ound. A towing speed of 10 km/h
must not be exceeded. Be yond these limits, only
transporting is permitted. T
T
o
o wing t
wing t he v
he vehicle wit
ehicle wit h bot
h both axles on t
h axles on t hegr
he ground
ound #
Obser vethe no tes on the permitted towing
me thods (/ page 358). #
Plug-in hybrid: obser vethe no tes on the per-
mitted towing me thods (/ page 359). #
Make sure that the battery is connected and
ch arge d.
Obser vethefo llowing points when the battery is
dischar ged:
R theve hicle cann otbe star ted
R the electric parking brake cannot be released
or applied
R V
Vehicles wit
ehicles wit h aut
h automatic tr
omatic tr ansmission:
ansmission: the
transmission cannot be shiTed toposition i
or j. 360
360
Breakdown assistance

#
Switch on theve hicle; the steering wheel loc k-
ing may otherwise engage. &
W
WARNING
ARNING Risk of accident due tolimited
saf ety-re lated functions during theto wing
process
Saf ety-re lated functions are limited or no lon-
ge rav ailable in thefo llowing situations:
R theve hicle is switched o..
R the brake system or po wer steering system
is malfunctioning.
R the energy supply or the on-board electri-
cal system is malfunctioning.
When your vehicle is towe daw ay, signi/cantly
more e.ort may be requ ired tosteer and
brake than is normally requ ired. #
Use a tow bar. #
Make sure that the steering wheel can
mo vefreely be fore towing theve hicle
awa y. *
N
NO
OTE
TE Damage due toexcessive tractive
po wer If
yo u pull away sharpl y,the tractive po wer
may be too high and theve hicles could be
damaged. #
Pull away slo wlyand smoo thly. Loading t
Loading t
he v
he vehicle f
ehicle f or tr
or transport
anspo rt Hybr
Hybr
id v
id vehicles:
ehicles: transpor tation of vehicles should
only be car ried out byprofessional reco very com-
panies. #
Obser vethe no tes on towing away
( / page 360). #
Connect theto wing device totheto wing eye
in order toload theve hicle.
% You can also attach theto w bar tothe trailer
hitch. #
V
Vehicles wit
ehicles wit h aut
h automatic tr
omatic tr ansmission:
ansmission: shiTthe
automatic transmission toposition i.
% V
Vehicles wit
ehicles wit h aut
h automatic tr
omatic tr ansmission:
ansmission: the
automatic transmission may be loc ked in posi- tion
jintheev ent of damage tothe electri-
cal system. ToshiT toi , pr ovide the on-
board electrical system with po wer
( / page 357). #
V
Vehicles wit
ehicles wit h manual tr
h manual tr ansmission:
ansmission: shiTto
neutral. #
Load theve hicle onto the transpor ter. #
V
Vehicles wit
ehicles wit h aut
h automatic tr
omatic tr ansmission:
ansmission: shiTthe
automatic transmission toposition j. #
V
Vehicles wit
ehicles wit h manual tr
h manual tr ansmission:
ansmission: engage
/rst or reve rsege ar. #
Use the electric parking brake tosecure the
ve hicle against rolling away. #
Only secure theve hicle bythe wheels.
V
V ehicles wit
ehicles wit h adap
h adaptiv
tiv e dam
e dam ping adjus
ping adjustment tment &
W
WARNING
ARNING Risk of an accident when trans-
porting vehicles with adaptive damping
adjustment
When transpo rting vehicles with adaptive
damping adjustment, theve hicle/trailer com-
bination may begin torock and start toskid. 362
362
Breakdown assis
tance

#
Load theve hicle cor rectly onto the
transpor ter. #
Secure theve hicle on all four wheels
with suitable tensioning straps. #
Do not exceed the maximum permissible
speed of 60 km/h when transporting. *
N
NO OTE
TE Damage totheve hicle from secur-
ing it inco rrectly #
ATer loading, theve hicle must be
secured on all four wheels. Otherwise,
th eve hicle could be damaged. #
A minimum dis tance of 20 cm upwards
and 10 cm down wards must be kept to
th e transport platform. #
Secure theve hicle on all four wheels aTer
loading. 4MA
4MA
TIC v
TIC v ehicles/v
ehicles/v ehicles wit
ehicles wit h aut
h automatic tr
omatic tr ans-
ans-
mission
mission #
Make sure that the front and rear axles come
to rest on the same transpor tation vehicle.
* N
NOOTE
TE Damage tothe drive train due to
incor rect positioning of theve hicle #
Do not position theve hicle abo vethe
connection point of the transport vehi-
cle. T
T
o
o wing ey
wing eye st
e st or
orag
ag e location
e location The
towing eye is under the load compartment
0oor. F
F
itting and r
itting and r emo
emoving t
ving t heto
he towing eye
wing eye #
Press the mark on co ver1 inwa rds and
re mo ve. Breakd
own assistance
363
363

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