2021 MERCEDES-BENZ CLA COUPE warning

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 366)
R Displ aymessages about the tyres
(/ page 459)
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 366) 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 370
370
Wheels and tyres

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. Wheels and tyres
371 371

#
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
NOOTE
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
NOOTE
TE Damage toelectronic component
parts due tothe use of ty re-/tting tools V
V
ehicles wit
ehicles wit h tyr
h tyre pr
e pressur
essur e monit
e monit or
oring 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. 372 372
Wheels and tyres

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
oring 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
acter
eris
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 226). 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 366)
R Tyre pressure table (/ page 367)
R Notes on the emer gency spa rewheel
(/ page 380) 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. Wheels and tyres
373
373

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
377
377

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 378).
* 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 370).
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. &
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. #
Be sure toobser vethe inst ructions and saf ety
no tes on "Changing a wheel" (/ page 370). #
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 379). 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 379). #
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
379
379

#
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 370). #
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 369). 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- 380
380
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 /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 366)
R Tyre pressure table (/ page 367)
R Notes on /tting tyres (/ page 370)
R Fitting an emer gency spa rewheel
(/ page 375) 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
and a1x it tothe inst rument clus ter within the
driver's /eld of vision. #
Remo vethe tyre in0ation compressor from the
st ow age well under the boot 0oor
(/ page 346). Wheels and tyres
381
381