2021 MERCEDES-BENZ A-CLASS SALOON Owners Manual

Plas
Plastic hub cap
tic hub cap #
T
To r
o r emov
emov e:
e:turn the centre co ver of the hub
cap anti-clockwise and remo vethe hub cap. #
T To o /t:
/t: make sure that the centre co ver of the
hub cap is turned anti-clockwise. #
Position the hub cap and turn the centre co ver
clockwise until the hub cap engages ph ysically
and audibl y.
Aluminium hub cap
Aluminium hub cap #
T
To r
o r emov
emov e:
e:position soc ket2 from the tyre-
ch ange tool kit on hub cap 1.#
Position wheel spanner 3on soc ket2. #
Using wheel spanner 3, turn hub cap1
anti-clockwise and remo veit. #
T
T o
o /t:
/t: follow the inst ructions abo veinreve rse
order.
% Speci/ed
Speci/ed tight
tightening t
ening t orq
orque:ue: 25 Nm. R
R
aising t
aising t he v
he vehicle when c
ehicle when c hanging a wheel
hanging a wheel R
R
eq
eq uir
uir ements:
ements:
R There are no persons in theve hicle.
R The vehicle has been prepared for a wheel
ch ange (/ page 373).
R The wheel trims and hub caps ha vebeen
re mo ved (/ page 373).
Impor tant no tes on using the jack:
R Use only a vehicle-speci/c jack that has been
appr ovedby Mercedes-Benz toraise theve hi-
cle.
R The jack is only designed forra ising and hold-
ing theve hicle for a short time while a wheel
is being changed and not for maintenance
wo rkunder theve hicle. R
The jack must be placed on a /rm, 0at and
non-slip sur face. If necessar y,use a lar ge, 0at,
load-bearing, non-slip underla y.
R The foot ofthe jack must be positioned verti-
cally under the jack support point. 374
374
Wheels and tyres

Ru
les of conduct when theve hicle is raised:
R Never place your hands or feet under theve hi-
cle.
R Never lie under theve hicle.
R Do not start theve hicle and do not release the
electric parking brake.
R Do not open or close any doors or the boot
lid. #
Using the wheel wrench, loosen the wheel
bolts on the wheel you wish tochange by
about one full turn. Do not unscr ewthe
scr ews comple tely. Po
sition of jack support points
* 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 injury from incor rect
positioning of the jack
If yo u do not position the jack cor rectly at the
appropriate jacking point of theve hicle, the
jack could tip wi th theve hicle raised. #
Only position the jack at the appropriate
jacking point of theve hicle. The base of th
e jack must be positioned vertically
under the jacking point of theve hicle. *
N
NOOTE
TE Vehicle damage from the jack If
yo u do not position the jack cor rectly at the
appropriate jack support point of theve hicle,
th e jack could tip over with theve hicle raised. #
The jack is designed exclusively for jac k-
ing up theve hicle at the jack support
points. #
Take thera tchet out of the tyre-change tool kit
and place it on the he xagon nut of the jack so
th at the letters "AUF" are visible. Wheels and tyres
375
375

#
Position support 2of jack 4on jack sup-
port point 1.
% Ifth ere is a tota l loss of pressure in a tyre, it
may be possible that the jack cannot be posi-
tioned at jack support point 1. Inthis case,
unload theve hicle. #
Turn ratchet 3clockwise until support 2
sits comple tely on jack support point 1and
th e base of the jack lies evenly on thegr ound. #
Turn ratchet 3until the tyre is raised a maxi-
mum of 3 cm from thegr ound. #
Loosen and remo vethe wheel (/ page 376). R
R
emo
emo ving a wheel
ving a wheel R
R
eq
eq uir
uir ements:
ements:
R The vehicle is raised (/ page 374).
* NO
NOTE
TEMercedes-AMG vehicles #
Obser vethe no tes in the Supplement.
Yo u could otherwise failto recognise
dangers. When
changing a wheel, avoid applying any force
to the brake disks, as this could impair the le vel of
comfort when braking. *
N
NOOTE
TE Damage tothre ading from dirt on
wheel bolts #
Do not place wheel bolts in sand or on a
dirty sur face. #
Unscr ewthe uppermost wheel bolt com-
ple tely. #
Screw cent ring pin 1into theth re ad ins tead
of the wheel bolt. #
Unscr ewthere maining wheel bolts com-
ple tely. #
Remo vethe wheel and, if necessar y,store it in
th e boot. 376 376
Wheels and tyres

#
Notes on removing an emer gency spa rewheel
(/ page 378). F
F
itting a ne
itting a ne w wheel
w wheel R
R
eq
eq uir
uir ements:
ements:
R The wheel tobe changed is remo ved and the
cent ring pin is sc rewe d in (/ page 376).
* NO
NOTE
TEMercedes-AMG vehicles #
Obser vethe no tes in the Supplement.
Yo u could otherwise failto recognise
dangers. &
W
W ARNING
ARNING Risk of accident from losing a
wheel
Oiled, greased or damaged wheel bolt/wheel
nut thre ads or wheel hub/wheel mounting
bolt thre ads can cause the wheel bolts/wheel
nuts tocome loose.
As a result, you could lose a wheel while driv-
ing. #
Never oil or grease theth re ads. #
Intheev ent of damage totheth re ads,
contact a quali/ed specialist workshop
immediatel y. #
Have the damaged wheel bolts or dam-
aged hub thre ads replaced. #
Do not continue driving. #
Obser vethe information on thech oice of tyres
(/ page 368).
Fo r tyres with a speci/ed direction of rotation, an
ar ro w on the side wall of the tyre indicates the
cor rect direction of rotation. Obser vethe direc-
tion of rotation when /tting. #
Slide the wheel tobe mounted onto the cen-
tring pin and push it on. #
Obser vethe no tes on /tting an emer gency
spa rewheel (/ page 378). &
W
WARNING
ARNING Risk of injury from tightening
wheel bolts and nuts
If yo u tighten the wheel bolts or wheel nuts
when theve hicle is raised, the jack could tip. #
Only tighten wheel bolts or wheel nuts
when theve hicle is on thegr ound. #
Obser vethe inst ructions and saf ety no tes on
"Changing a wheel" (/ page 368). #
For saf etyre asons, only use wheel bolts which
ha ve been appr oved byMercedes-Benz and
fo rth e wheel in question. #
Tighten the wheel bolts evenly in a diagonal
pattern in the order indicated until they are
/nger-tight. #
Unscr ewand remo vethe centring pin. #
Tighten the last wheel bolt until it is /n ger-
tight. #
Lowe rth eve hicle (/ page 377). Low Low
er
ering t
ing t he v
he vehicle
ehicle aTer
aTera wheel c
a wheel c hange
hange R
R
eq
eq uir
uir ements:
ements:
R The new wheel has been /tted (/ page 377). #
T
To low
o low er t
er the v
he v ehicle:
ehicle: placethera tchet onto
th e he xagon nut of the jack so that the letters
"AB" are visible and turn anti-clockwise. Wheels and tyres
377
377

#
Tighten the wheel bolts evenly in a diagonal
pattern in the order indicated 1to5 with
an initial maximum forc e of 80 Nm. #
Tighten the wheel bolts evenly in a diagonal
pattern in the order indicated 1to5 with
th e speci/ed tightening torque of 130 Nm. &
W
WARNING
ARNING Risk of accident due toincor-
re ct tightening torque
The wheels could come loose if the wheel
bolts or wheel nuts are not tightened tothe
prescribed torque. #
Ensure that the wheel bolts or wheel
nuts are tightened tothe prescribed
tightening torque. #
Ifyo u are not sure, do not mo vetheve hi-
cle. Con tact a quali/ed specialist work-
shop and ha vethe tightening torque
ch ecked immediatel y. #
Check the tyre pressure of the ne wly/tted
wheel and adjust it if necessar y.
% The following does not apply if the new wheel
is an emer gency spa rewheel. #
V
V ehicles wit
ehicles wit h tyr
h tyre pr
e pr essur
essur e loss w
e loss w ar
arning sy
ning sy s-
s-
t
t em:
em: restart the tyre pressure loss warning
system (/ page 368). #
V
V ehicles wit
ehicles wit h a tyr
h a tyre pr
e pressur
essur e monit
e monit or
oring sy
ing sy s-
s-
t
t em:
em: restart the tyre pressure monitoring sys-
te m (/ page 367). Emerg
Emerg
ency spar
ency spar e wheel
e wheel N
No
ot
tes on t
es on t he emerg
he emerg ency spar
ency 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- 378
378
Wheels and tyres

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 boot.
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
oring 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 364)
R Tyre pressure table (/ page 365)
R Notes on /tting tyres (/ page 368)
R Fitting an emer gency spa rewheel
(/ page 373) In0ating In0ating
t
the emerg
he emerg ency spar
ency spar e wheel
e wheel *
N
NOOTE
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. R
R
eq
eq uir
uir ements:
ements:
Comply with the manufacturer's saf ety no tes on
th e stic ker of the emer gency spa rewheel and on
th e tyre in0ation compressor. #
Remo vethe stic ker with the label 80 km/h
from the tyre in0ation compressor housing Wheels and tyres
379
379

and a1x it
tothe inst rument cluster within the
driver's /eld of vision. #
Remo vethe tyre in0ation compressor from the
st ow age well under the boot 0oor
(/ page 344, 343). #
Pull /ller hose 1and plug 3out of the tyre
in0ation compressor housing. #
Insert plug 7of /ller hose 1inthe soc ket
on the tyre in0ation compressor and then turn
it until plug 7engages. #
Unscr ewthe cap from theva lve on the emer-
ge ncy spa rewheel. #
Screw union nut 2of /ller hose 1onto the
va lve. #
Make sure on and o. switch 4ofthe tyre
in0ation compressor is set to 00. #
Insert plug 3in a soc ket in your vehicle.
R Cigar ette lighter soc ket
R 12 V soc ket (/ page 125)
R Obser vethe no tes on the cigar ette lighter in
th e Digital Owner's Manual
R Obser vethe no tes on soc kets (/ page 125). #
Press the start/s top button once toswitch on
th e po wer supply (/ page 159). #
Press on and o. switch 4onthe tyre in0a-
tion compressor to II.
The tyre in0a tion compressor is switched on.
The tyre is in0ated. The tyre pressure is shown
on manom eter 5. #
Pump the tyre tothe speci/ed tyre pressure.
% The speci/ed tyre pressure is stated on the
label of the emer gency spa rewheel. #
When the speci/ed tyre pressure has been
re ached, press on and o. switch 4onthe
tyre in0ation compressor to 00.
The tyre in0a tion compressor is switched o.. #
Press the start/s top button toswitch o. the
po we r suppl y. #
Ifth e tyre pressure is higher than the speci/ed
pressure, press pressure release valve button
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. 380 380
Wheels and tyres

N
N
o
ot
tes on t
es on t ec
echnical data
hnical data
* NO
NOTE
TEMercedes-AMG vehicles #
Obser vethe no tes in the Supplement.
Yo u could otherwise failto recognise
dangers. The
tech nical data was de term ined in accordance
with EU Directives. The data stated only applies to
ve hicles with standard equipment. You can obtain
fur ther information from a Mercedes-Benz Service
Centre.
Onl Onl y f
y for cert
or cert ain countr
ain countr ies:
ies:you can /n dvehicle-
speci/c vehicle data in theCO C documents (CER-
TIFIC ATE OF CONFORMITY). These documents
are deli vered with your vehicle. On-boar
On-boar
d electr
d electronics
onics N
No
ot
tes on t
es on t am
amper
per ing wit
ing wit h t
h t he engine electr
he engine electr onics
onics *
N
NOOTE
TE Prematu rewe arthro ugh improper
maintenance Improper maintenance may cause
vehicle
components towe ar more quickly and the
ve hicle's operating permit may be in validated. #
Always ha veworkon the engine elec-
tronics and related components car ried
out at a quali/ed specialist workshop. T
T
w
w o-wa
o-wa y r
y radios
adios N
No
ot
tes on
es on /tting
/tting tw
two-wa
o-wa y r
y radios
adios &
W
WARNING
ARNING Risk of accident due to
improper workon two-w ayradios
If two-w ayradios are manipulated or retro/t-
ted incor rectl y,the electromagnetic radiation
from the two-w ayradios can inter fere with the
ve hicle elect ronics and jeopardise the operat-
ing saf ety of theve hicle. #
You should ha veall workon electrical
and electronic components car ried out
at a quali/ed specialist workshop. &
W
WARNING
ARNING Risk of accident due to
improper operation of two-w ayradios
If yo u use two-w ayradios in theve hicle
improper ly,th eir electromagnetic radiation
can disrupt theve hicle's elect ronics. This is
th e case in thefo llowing situations, in particu-
lar:
R The two-w ayradio is not connected toan
ex terior aerial.
R The exterior aerial is /tted incor rectly or is
not a lo w-re0ection aerial.
This could jeopardise the operating saf ety of
th eve hicle. #
Have the lo w-re0ection exterior aerial /t-
ted at a quali/ed specialist workshop. #
When operating two-w ayradios in the
ve hicle, alw ays connect them tothe lo w-
re 0ection exterior aerial. Te
ch nical data
381
381