2022 MERCEDES-BENZ A-CLASS SALOON Owners Manual


Notes on removing an emergency spare wheel
( pag
e 383). Fitting a new wheel
Requirements:
= The wheel t

o be changed is removed and the
centring pin is screwed in (  page 381).
* NOTE Mer
cedes-AMG vehicles 
Observe the notes in the Supplement.
Y
ou could otherwise fail to recognise
dangers. &
WARNING Risk of accident fr
om losing a
wheel
Oiled or greased wheel bolts can cause the
wheel bolts t
o come loose, as too can dam-
aged wheel bolts or wheel hub threads. 
Never oil or grease the threads. 
In the event of damage to the threads,
cont

act a qualiNed specialist workshop
immediately. 
Have the damaged wheel bolts or dam-
ag

ed hub threads replaced. 
Do not continue driving. 
Observe the information on the choice of tyres
( pag

e 373).
For tyres with a speciNed dir
ection of rotation, an
arrow on the side wall of the tyre indicates the
correct direction of rotation. Observe the direc-
tion of rotation when Ntting. 
Slide the wheel to be mounted onto the cen-
tr
ing pin and push it on. 
Observe the notes on Ntting an emer
gency
spare wheel ( page 383). &
WARNING Risk of injur
y from tightening
wheel bolts and nuts
If you tighten the wheel bolts or wheel nuts
when t
he vehicle is raised, the jack could tip. 
Only tighten wheel bolts or wheel nuts
when t

he vehicle is on the ground. 
Observe the instructions and safety notes on
"Changing a wheel"

( page 373). 
For safety reasons, only use wheel bolts which
ha

ve been approved by Mercedes-Benz and
for the wheel in question. 
Tighten the wheel bolts evenly in a diagonal
patt
ern in the order indicated until they are
Nnger-tight. 
Unscrew and remove the centring pin. 
Tighten the last wheel bolt until it is Nng
er-
tight. 
Lower the vehicle ( pag
e 382). Lowering the vehicle
aser a wheel c
hange Requirements:
= The ne

w wheel has been Ntted ( page 382). 
To lower the vehicle: place t
he ratchet onto
the hexagon nut of the jack so that the letters
"AB" are visible and turn anti-clockwise. 382
Wheels and tyres


Tighten the wheel bolts evenly in a diagonal
patt ern in the order indicated 1 to 5 with
an initial maximum force of 80 Nm. 
Tighten the wheel bolts evenly in a diagonal
patt
ern in the order indicated 1 to 5 with
the speciNed tightening torque of 130 Nm. &
WARNING Risk of accident due t
o incor-
rect tightening torque
The wheels could come loose if the wheel
bolts or wheel nuts ar
e not tightened to the
prescribed torque. 
Ensure that the wheel bolts or wheel
nuts ar
e tightened to the prescribed
tightening torque. 
If you are not sure, do not move the vehi-
cle. Cont

act a qualiNed specialist work-
shop and have the tightening torque
checked immediately. 
Check the tyre pressure of the newly Ntt
ed
wheel and adjust it if necessary.
% The following does not apply if the new wheel
is an emer
gency spare wheel. 
Vehicles with a tyre pressure loss warning sys-
t
em: restart the tyre pressure loss warning
system (  page 373). 
Vehicles with a tyre pressure monitoring sys-
t
em: restart the tyre pressure monitoring sys-
tem ( page 372). Emergency spare wheel
Notes on the emergency spare wheel
&
WARNING Risk of accident caused b
y
incorrect wheel and tyre dimensions
The wheel or tyre size and the tyre type of the
emer
gency spare wheel or spare wheel and
the wheel to be replaced may diMer. The emer-
gency spare wheel or spare wheel can signiN-
cantly impair driving characteristics of the
vehicle.
To prevent hazardous situations: 
Drive carefully. 
Never Nt mor
e than one emergency
spare wheel or spare wheel that diMers
in size. 
Only use an emergency spare wheel or
spar
e wheel brieOy. 
Do not deactivate ESP n
. 
Have the emergency spare wheel or
spar

e wheel of a diMerent size replaced
at the nearest qualiNed specialist work- Wheels and tyres
383

shop. The new wheel must have the cor-
r
ect dimensions. %
The emergency spare wheel is secured in the
emer
gency spare wheel bag in the boot.
Observe the following notes on removing an emer-
g
ency spare wheel:
= Before stowing the emergency spare wheel,
make sure there is no air les in the tyre.
If necessary, allow the air to escape.
= To release air from the tyre: remove the valve
cap of the tyre.
= Press down the metal insert in the valve using
a pointed object, e.g. a pen.
= Screw the valve cap onto the valve.
Observe the following notes on Ntting an emer-
gency spare wheel:
= The maximum permissible speed with an
emergency spare wheel Ntted is 80 km/h.
= Do not Nt the emergency spare wheel with
snow chains. =
R
eplace the emergency spare wheel aser six
years at the latest, regardless of wear.
= Use the wheel bolts that are included with the
emergency spare wheel.
= Check the tyre pressure of the emergency
spare wheel Ntted. Correct the pressure as
necessary.
% The speciNed tyr
e pressure is stated on the
label of the emergency spare wheel.
% Vehicles with a tyre pressure loss warning
sy
stem: if an emergency spare wheel is Ntted,
the tyre pressure loss warning system cannot
function reliably. Only restart the system
again when the emergency spare wheel has
been replaced with a new wheel.
Vehicles with a tyre pressure monitoring sys-
tem: if an emergency spare wheel is Ntted, the
tyre pressure monitoring system cannot func-
tion reliably. For a few minutes aser an emer-
gency spare wheel is Ntted, the system may
still display the tyre pressure of the removed
wheel. Only restart the system again when the
emergency spare wheel has been replaced
with a new wheel. Be sure to also observe the following further rela-
t

ed subjects:
= Notes on tyre pressure (  page 369)
= Tyre pressure table ( page 370)
= Notes on Ntting tyres ( page 373)
= Fitting an emergency spare wheel
( page 378) *nOating
t
he emergency spare wheel *
NOTE Ov
erheating due to the tyre inOation
compressor running too long 
Do not run the tyre inOation com
pressor
for longer than ten minutes without inter-
ruption. Requirements:
= The emer

gency spare wheel has been Ntted
correctly. ( page 378)
% Comply with the manufacturer's safety notes
on t
he sticker of the emergency spare wheel
and on the tyre inOation compressor. 384
Wheels and tyres


Remove the sticker with the label 80 km/h
fr
om the tyre inOation compressor housing
and aPx it to the instrument cluster within the
driver's Neld of vision. 
Remove the tyre inOation com
pressor from the
stowage well under the boot Ooor
( page 349, 348). 
Pull Nller hose 1 and plug 3 out of t
he tyre
inOation compressor housing. 
Insert plug 7 of Nller hose 1 in t
he socket
on the tyre inOation compressor and then turn
it until plug 7 engages. 
Unscrew the cap from the valve on the emer-
g
ency spare wheel. 
Screw union nut 2 of Nller hose 1 ont
o the
valve. 
Make sure on and oM switc
h 4 of the tyre
inOation compressor is set to 0. 
Insert plug 3 in a soc
ket in your vehicle.
= Cig
arette lighter socket
= 12 V socket (  page 126)
= Observe the notes on the cigarette lighter in
the Digital Owner's Manual
= Observe the notes on sockets ( page 126). 
Press the start/stop button once to switch on
t
he power supply (  page 160). 
Press On/OM switc
h 4 on the tyre inOation
compressor to I.
The tyre inOation compressor is switched on.
The tyre is inOated. The tyre pressure is shown
on manometer 5. 
Pump the tyre to the speciNed tyr
e pressure.%
The speciNed tyr
e pressure is stated on the
label of the emergency spare wheel. 
When the speciNed tyr
e pressure has been
reached, press on and oM switch 4 on the
tyre inOation compressor to 0.
The tyre inOation compressor is switched oM. 
Press the start/stop button to switch oM t
he
power supply. 
If the tyre pressure is higher than the speciNed
pr
essure, press pressure release valve button
6 until the correct tyre pressure has been
reached. 
Unscrew union nut 2 of Nller hose 1 fr
om
the valve. 
Screw the valve cap of the emergency spare
wheel ont

o the valve again. 
Stow Nller hose 1 and plug 3 in t
he lower
section of the tyre inOation compressor hous-
ing. 
Stow the tyre inOation com
pressor in the vehi-
cle. Wheels and tyres
385

Notes on technical data
* NOTE Mercedes-AMG vehicles 
Observe the notes in the Supplement.
Y
ou could otherwise fail to recognise
dangers. The technical data was determined in accordance
wit

h EU Directives. The data stated only applies to
vehicles with standard equipment. You can obtain
further information from a Mercedes-Benz Service
Centre.
Only for certain countries: you can Nnd vehicle-
speciNc vehicle data in the COC documents (CER-
TIFICATE OF CONFORMITY). These documents
are supplied when the vehicle is delivered. On-board electronics
Notes on tampering with the engine electronics
*
NOTE Pr
emature wear through improper
maintenance Improper maintenance may cause vehicle
com

ponents to wear more quickly and the
vehicle's operating permit may be invalidated. 
Always have work on the engine elec-
tr

onics and related components carried
out at a qualiNed specialist workshop. Two-way radios
Notes on Ntting
tw
o-way radios &
WARNING Risk of accident due t
o
improper work on two-way radios
If two-way radios are manipulated or r
etroNt-
ted incorrectly, the electromagnetic radiation
from the two-way radios can interfere with the
vehicle electronics and jeopardise the operat-
ing safety of the vehicle. 
You should have all work on electrical
and electr

onic components carried out
at a qualiNed specialist workshop. &
WARNING Risk of accident due t
o
improper operation of two-way radios
If you use two-way radios in the vehicle
im
properly, their electromagnetic radiation
can disrupt the vehicle's electronics. This is
the case in the following situations, in particu-
lar:
= The two-way radio is not connected to an
exterior aerial.
= The exterior aerial is Ntted incorrectly or is
not a low-reOection aerial.
This could jeopardise the operating safety of
the vehicle. 
Have the lo
w-reOection exterior aerial Nt-
ted at a qualiNed specialist workshop. 
When operating two-way radios in the
v

ehicle, always connect them to the low-
reOection exterior aerial. 386
Technical data

*
NOTE Invalidation of the operating permit
due to failure to comply with the instruc-
tions for installation and use The operating permit may be invalidated if the
ins
tructions for installation and use of two-way
radios are not observed. 
Only use approved frequency bands. 
Observe the maximum permissible out-
put po
wer in these frequency bands. 
Only use approved aerial positions. 1
Front roof area
2 Rear roof area
3 Rear wings
4 boot lid
On vehicles with a panoramic sliding sunroof, Nt-
ting an aer

ial to the front or rear roof area is not
permitted. On the rear wings, it is recommended that you
Nt
t
he aerial on the side of the vehicle closest to the
centre of the road.
Use Technical SpeciNcation ISO/TS 21609 (Road
Vehicles !

Frequency band and maximum transmission out-
put Frequency band Maximum transmis-
sion output
Short wave
3 - 54 MHz 100 W
4 m frequency band
74 - 88 MHz 30 W
2 m frequency band
144 - 174 MHz 50 W
Terrestrial Trunked
R adio (TETRA)
380 - 460 MHz 10 W
70 cm frequency band
420 - 450 MHz 35 W
Two-way radio
(2G/3G/4G) 10 W The following can be used in the vehicle without
r

estrictions:
= two-way radios with a maximum transmission
output of up to 100 mW
= RF transmitters with transmitter frequencies in
the 380 - 410 MHz frequency band and a
maximum transmission output of up to 2 W
(TETRA)
= mobile phones (2G/3G/4G)
There are no restrictions when positioning the
aerial on the outside of the vehicle for the follow-
ing frequency bands:
= Terrestrial Trunked Radio (TETRA)
= 70 cm frequency band
= 2G/3G/4G Regulatory radio
identiNcation and no
tes Regulatory radio
identiNcation of small com
po-
nents Manufacturer information about radio-based vehi-
cle com
ponents can be found using the key
phrase "Regulatory radio identiNcation in the Dig- ital Owner's Manual in the vehicle, on the internet
and in t
he app. Regulatory radio
identiNcation !

Vehicle
identiNcation plat e, VIN and engine num-
ber overview
Vehicle identiNcation plate Vehicle
identiNcation plat
e (example: Kuwait)
1 Vehicle manufacturer
2 Place of manufacture
3 Manufacturing date
4 Vehicle model
5 VIN Vehicle
identiNcation plat e (example: all other
countries)
1 Vehicle manufacturer
2 EU general operating permit number (only for
cer

tain countries)
3 VIN (vehicle identiNcation number)
4 Maximum permissible gross vehicle weight
(k
g) Technical data
389