2018 MERCEDES-BENZ CLA COUPE Owner's Manual

Important safety notes
GWARNING
If wheels and tires of th ewrong siz eare used,
th ew hee lbrakes or suspension component s
may be damaged. Ther eisariskofana cci-
dent.
Always replace wheels and tires wit hthose
that fulfill th especification softheoriginal
part .
When replacing wheels, mak esuretou se the
correct:
Rdesignation
Rmodel
When replacing tires ,makes uretou se the
correct:
Rdesignation
Rmanufacturer
Rmodel
GWARNIN G
Af lat tire severely impairs th edriving ,steer -
ing and braking characteristics of th evehicle.
Ther eisar iskofa ccident.
Tires without run-flat characteristics :
Rdo notdrivew ithaf lat tire.
Rimmediately replace th eflat tire wit hyour
emergenc yspar ew hee lors parew heel, or
consult aqualified specialist workshop.
Tires wit hrun-flat characteristics :
Rpay attention to theinformation and warn -
ing notice sonMOExtended tires (tire swith
run-flat characteristics).
Accessories that are no tapprove dfor your vehi-
cle by Mercedes-Ben zorare notbein gused cor-
rectl ycan impair th eoperating safety.
Before purchasing and usin gnon-ap proved
accessories, visit aqualified specialist work-
sho pand inquire about :
Rsuitability
Rlegal stipulation s
Rfactory recommendation sFurther information regarding wheels and tires
can be foun
dunder "Wheel/tire combinations"
(
Ypage 312).
You can ask for information regarding permitte d
wheel/tire combination satanauthorized
Mercedes-Ben zCenter.
Information on tire pressur ecan be found:
Ron th eTirea nd Loading Information placard
on th eB-pillar on th edriver' sside
(
Ypage 298)
Rin th etirep ressur etable in th efuel filler flap
(Ypage 139)
Runder "Tir epressure" (Ypage 290)
Operation
Information on driving
Checkthe tire pressur ewhen th evehicl eis
heavily laden and adjust prio rtoatrip.
While driving ,pay attention to vibrations, noises
and unusual handlin gcharacteristics ,e.g.p ull-
ing to on eside .This may indicat ethatthe
wheels or tires are damaged. If you suspec ttha t
at ireisd efective, reduce your spee dimmedi-
ately. Stop th evehicl eass oonasp ossible to
chec kthe wheels and tires for damage. Hidden
tire damag ecould also be causing th eunusual
handlin gcharacteristics .Ifyou fin dnos ignsof
damage, hav ethe tires and wheels checke data
qualified specialist workshop.
When parking your vehicle, mak esuret hatthe
tires do no tget deformed by th ecurboro ther
obstacles. If they canno tbeavoided, driv eover
obstacles suc hascurbs slowly and at an obtuse
angle. Otherwise, you may damag ethe wheels
or tires .
Regula rchecking of wheels and tires
GWARNIN G
Damaged tires can caus etirei nflation pres-
sur eloss .Asar esult,you could lose control of
your vehicle. Ther eisariskofa ccident.
Chec kthe tires regularly for sign sofdamage
and replace any damaged tires immediately.
Operation287
Wheels and tires
Z

Checkwheelsand tires for damag eatleast once
am onth .Checkw heelsa nd tires after driving
off-road or on roug hroads. Damaged wheels
can caus ealoss of tir epressure. Pay particular
attentio ntodamagesucha s:
RCutsinthet ires
RPunctures inthet ires
RTearsint hetires
RBulges on tires
RDeformation or severe corrosiononw heels
Regularly check thetiret read dept hand the
conditio nofthetread across th ewhole widthof
th et ire(
Ypage 288). Ifnecessary, tur nthe
frontw heelstof ull lockino rder to inspectt he
inner sideof thetires urface.
All wheelsm ust haveavalvec ap to protect the
valv eagainst dirtand moisture. Do no tmount
anythingo ntot he valv eother than th estandard
valv ecap or other valv ecaps approved by
Mercedes-Ben zfor your veh icle.Don otuse any
other valv ecaps or systems ,e.g.t irep ressure
monitorin gsystems.
Regularly check thepressureofa llth et ires par-
ticularly priortol ongt rips. Adjus tthe tirep res-
sure as necessary (
Ypage 290).
Observ ethe note sont heemergenc yspare
wheel (
Ypage 312).
The servic elife of tires depends, amon gother
things, on th efollowin gfactors:
RDrivin gstyle
RTire pressure
RDistance covered
Notes on tir etread
GWAR NING
In suff icient tir etread will reduce tir etraction.
The tir eisnol ongerabletodissipat ewater.
This mean stha tonw et road surfaces ,the risk
of hydroplaning increases, inparticular where
speedisn otadapted to suit th edriving con-
dit ions. Thereisar iskofa cciden t.
If th et irep ressureist oohigh or to olow, tires
may exhibit diff erent levelsof wear at differ-
entl ocations on th etiret read. Thus,y ou
should regularly check th etread dept hand
th ec onditio noft hetread across th eentire
widt hofa lltires.
Minimum tir etread depthf or:
RSummer tires: âin(3 mm)
RM+S tires: ãin(4 mm)
For safety reasons, replace th etires before
th el egally prescribe dlimit for th eminimum
tir et read depthisr eached.
Marking:shows whereb ar indicator ;for
tread wear is integrate dintot he tiret read.
Treadwear indicators (TWI)a re requiredbylaw.
Six indicators are positione donthetiret read.
They are vis ibleonce atread depthofa pprox-
imately áin(1. 6m m) has been reached. Ifthis
is thec ase, th etireissow orn that it must be
replace d.
Selecting, mounting and replacing
tires
GWARNING
Exceedingt hestate dtirel oad-bearing capa-
cit ya nd th eapprove dmaximum speedc ould
lead to tir edamag eorthetireb ursting. There
is ar iskofa ccident.
Therefore, only use tiretype sand sizes
approve dfor your vehicle model. Observ ethe
tir el oad rating and speedr ating required for
your vehicle.
ROnly moun ttires and wheelsoft hesame type
and make.
Exception: itis permissible to install adiffer-
entt ype or mak eintheevent of aflat tire.
Observ eheret he"MOExtended tires (tires
288Operation
Wheels and tires

with run-flat characteristics)"section
(Ypage 271).
ROnly mountt ires of thecorrects izeontot he
wheels.
RBreak in new tires at moderates peeds for the
first6 0miles (100km).The newt ires only
reacht heir full performanc eafter this dis-
tance.
RDo not drivew ith tires which have too little
tread depth, as this significantly reduces the
traction on wet roads (hydroplaning).
RReplace th etires after six years at th elatest,
regardless of wear.
Observe th enotes on th eemergency spare
wheel (
Ypage 312).
MOExtended tires (tires with run-flat
properties)
With MOExtended tires (tires with run flat char-
acteristics) ,you can continue to drivey our vehi-
cle even if there is atotal loss of pressure in one
or moret ires.
MOExtended tires may only be used in conjunc-
tio nw ith an activated tir epressure loss warning
system (Canada only) or tir epressure monitor
(USAo nly) and only on wheels specifically tes-
ted by Mercedes-Benz.
Notes on driving with MOExtended tires with a
flat tir e(
Ypage 271).
Vehicles equipped with MOExtended tires are
not equipped with aTIREFIT kit at th efactory. It
is therefore recommended that you additionally
equip your vehicle with aTIREFIT kit if you mount
tires that do not feature run-flat properties, e.g.
winter tires. ATIREFI Tkit may be obtained from
aq ualified specialist workshop.
Winter operation
General notes
Have your vehicle winter-proofed at aqualified
specialist workshop at th eonset of winter.
Observe th enotes in th e"Changing awheel"
sectio n(
Ypage 307).
Driving with summer tires
At temperatures below 45 ‡(+7 †) ,summe r
tire slos ee lasticit ya nd therefore traction and
braking power.C hange thetires on your vehicle
to M+S tires. Usings ummer tires at verycold
temperatures coul dcaus ecrack stof orm,
therebyd amaging th etires permanently.
Mercedes-Ben zcanno taccept responsibilityf or
this type of damage.
GWARNING
Damaged tires can caus etirei nflation pres-
sure loss.Asar esult, you couldlose control of
your vehicle .Thereisar isk of accident.
Checkt hetires regularly for signsofd amage
and replace any damage dtires immediately.
M+S tires
GWARNING
M+S tires with atiret read depthofl ess than
ã in(4 mm )are no tsuitable for use in winter
and do no tprovide sufficient traction.T hereis
ar isk of an accident.
M+S tires with atread depthofl ess thanãin
(4 mm) must be replaced immediately.
At temperatures below 45 ‡(+7 †), use winter
tires or all-season tires. Both type softire are
identified by the M+S marking.
Only winter tires bearing the isnowflake
symbol in addition to the M+S marking provide
the best possibleg rip in wintry road conditions.
Only these tires wil lallow driving safety systems
such as ABS and ESP
®to function optimally in
winter. Theset ires have beend eveloped specif-
ically for driving in snow.
Use M+S tires of the same make and tread on all
wheels to maintain safe handling characteris-
tics.
Always observe the maximu mpermissible
speeds pecified for the M+S tires you have
mounted.
Wintero peration289
Wheels and tires
Z

When you have mounted the M+S tires:
XCheck the tire pressures (Ypage 290).
XRestart the tire pressure monitor (USA only)
(Ypage 297).
XRestart the tire pressure loss warning system
(Canada) (Ypage 294)
Snow chains
GWARNING
If snow chains are mounted on the rear
wheels, the snow chains could cause abrasion
to the vehicle body or to chassis components.
This could cause damage to the vehicle or the
tires. There is arisk of an accident.
To avoid hazardous situations:
Rnever mount snow chains on the rear
wheels
Ronly mount snow chains in pairs on the
frontw heels.
!On some tire sizes there is not enough space
for snow chains. To avoid damage to the vehi-
cle or tires, observe the "Wheel and tire com-
binations" section under "Tires and wheels".
For safety reasons, Mercedes-Benz recom-
mends that you only use snow chains that have
been specially approved for your vehicle by
Mercedes-Benz ,orare of acorresponding
standard of quality. For more information,
please contact aqualified specialist workshop.
If you inten dtomount snow chains, please bear
the following points in mind:
RSno wchains may not be mounted on all
wheel/tire combinations. Permissible wheel-
tire combinations (
Ypage 312).
ROnly use snow chains when driving on roads
completely covered by snow. Remove the
snow chains as soon as possible when you
come to aroad that is not snow-covered.
RLocal regulations may restrict the use of snow
chains. Observe the appropriate regulations if
you wish to mount snow chains.
RDo not exceed the maximum permissible
speed of 30 mph (50 km/h).
RNever use Parking Pilot when snow chains are
installed (Ypage 165). You may wish to deactivat
eESP
®when pulling
away with snow chains installed .You can
thereby allow the wheels to spin in acontrolled
manner, achieving an increased driving force
(cutting action).
RDeactivate ESP®(all vehicles except
Mercedes-AMG vehicles) (Ypage 65)
RDeactivate ESP®(Mercedes-AMG vehicles)
(Ypage 66)
Information about driving with an emergency
spare wheel (
Ypage 312).
Tirep ressure
Tirep ressure specifications
Important safety notes
GWARNING
Underinflated or overinflated tires pose the
following risks:
Rthe tires may burst, especially as the load
and vehicle speed increase.
Rthe tires may wear excessively and/or
unevenly, which may greatly impair tire
traction.
Rthe driving characteristics, as well as steer-
ing and braking, may be greatly impaired.
There is arisk of an accident.
Follow recommended tire inflation pressures
and check the pressure of all the tires includ-
ing the spare wheel:
Rmonthly, at least
Rif the load changes
Rbefore beginnin galong journey
Runder differento perating conditions, e.g.
off-road driving
If necessary, correct the tire pressure.
iThe data on the Tire and Loading Informa-
tion placard and tire pressure table shown
here are examples. Tire pressure specifica-
tions are vehicle-specific and may deviate
from the data shown here. The tire pressure
specifications that are valid for your vehicle
can be found on the Tire and Loading Infor-
290Tirep ressure
Wheels and tires

mation placard and tire pressure table on the
vehicle.
General notes
The recommended tire pressures for the tires
mounted at the factory can be found on the
labels described here.
Operation with an emergency spare wheel:
informationonoperation with an emergency
spare wheelc an be found in the general notes in
the "Emergency spare wheel" section
(
Ypage 312).
Further informatio nontire pressures can be
obtained at aqualified specialist workshop.
Tire and Loading Information placard
:Recommended tire pressures
The Tire and Loading Information placard is on
the B-pillar on the driver'ss ide (
Ypage 298).
The Tire and Loading Information placard con-
tains the recommended tire pressures for cold
tires. The recommended tire pressures are valid
for the maximu mpermissiblel oadand up to the
maximu mpermissiblev ehiclespeed.
Tire pressure table
The tire pressure table is on the inside of the fuel
filler flap .Itshows the tire pressure for all tires
permitted at the factory for this vehicle; see
illustratio n(example).
The tire pressure table contains the recommen-
ded pressures for cold tires for various operat-
ing conditions, i.e. differing loada nd speed con-
ditions.
If at ire size precedesat ire pressure, the fol-
lowing tire pressure informatio nisonly vali dfor
that tire size; see illustratio n(example).
The loadc onditions "partiall yladen" and "fully
laden" are defined in the table for different num-
bers of occupants and amounts of luggage .The
actua lnumber of seats may differ.
Some tire pressure table sshow only the rim
diameters instead of the full tire size, e.g. R18.
Rim diameter is part of the tire size and can be
found on the tire sidewal l(
Ypage 302).
Tire pressure291
Wheelsand tires
Z

If the tire pressures have been set to the lower
values for lighter loadsand/or lowerroad
speeds, the pressures shoul dbereset to the
higher values:
Rif you want to drive with an increased load
and/or
Rif you want to drive at higher speeds
iThe tire pressures for increased loadsa nd/
or higher road speeds, shown in the tire pres-
sure table, may have anegative effect on driv-
ing comfort.
If the tire pressure is not set correctly, this can
leadtoane xcessive build up of heat and asud-
den loss of pressure.
For more information, contact aqualifieds pe-
cialist workshop.
Important notes on tire pressure
GWARNING
If the tire pressure drops repeatedly,t he
wheel,v alve or tire may be damaged. Tire
pressure that is too low may resultinatire
blow-out. There is arisk of an accident.
RCheck the tire for foreign objects.
RCheck whether the wheel is losing air or the
valve is leaking.
If you are unabl etorectify the damage, con-
tact aqualifieds pecialist workshop.
GWARNING
If you fit unsuitable accessorieso nto tire
valves ,the tire valves may be overloaded and
malfunction, which can cause tire pressure
loss. Due to their design, retrofitted tire pres- sure monitors keep the tire valve open. This
can also resultint ire pressure loss. There is a
risk of an accident.
Only screw the standard valve cap or other
valve caps approved by Mercedes-Benz for
you rvehicle onto the tire valve.
Use asuitable pressure gauge to check the tire
pressure. The outer appearance of atire does
not permit any reliable conclusion aboutt he tire
pressure. On vehiclese quipped with the elec-
tronic tire pressure monitor, the tire pressure
can be checked in the on-board computer. The tire temperature and pressure increase
when the vehicle is in motion. This is dependent
on the driving speed and the load.
Therefore, you shoul
donly correct tire pres-
sures when the tires are cold.
The tires are cold:
Rif the vehicle has been parked with the tires
out of direct sunlight for at least three hours
and
Rif the vehicle has been driven less than 1mile
(1.6 km)
The tire temperature changes depending on the
outsidet emperature ,the vehicle speed and the
tire load.Ift he tire temperature changes by
18 ‡(10 †), the tire pressure changes by
approximately 10 kPa (0.1 bar/1.5 psi).T ake
this into account when checking the pressure of
warm tires. Only correct the tire pressure if it is
too low for the current operating conditions. If
you check the tire pressure when the tires are
warm, the resulting valuew illbehigherthan if
the tires were cold. This is normal. Do not
reduce the tire pressure to the values pecified
for cold tires. The tire pressure would otherwise
be too low.
Observe the recommended tire pressures for
cold tires:
Ron the Tire and Loading Information placard
on the B-pillaront he driver's side
Rin the tire pressure table in the fuel fillerf lap
(Ypage 139)
Underinflated or overinflated tires
Underinflated tires
GWARNING
Tires with pressure that is too low can over-
heat and burst as aconsequence. In addition,
they also suffer from excessive and/or irreg-
ularw ear, which can severelyi mpair the brak-
ing propertiesa nd the driving characteristics.
There is arisk of an accident.
Avoid tire pressures that are too low in all the
tires, including the spare wheel.
Underinflated tires may:
Roverheat, leading to tire defects
Radversely affect handling
292Tire pressure
Wheelsa nd tires

Rwear excessively and/or unevenly
Rhave an adverse effect on fuel consumption
Overinflated tires
GWARNING
Tires with excessively high pressure can burst
becaus etheya re damaged moree asily by
road debris,p otholes etc.Inaddition, they
also suffer fromi rregular wear, which can
severely impair th ebraking properties and the
driving characteristics. Thereisar isk of an
accident.
Avoid tir epressures that are too high in all the
tires, including th espare wheel.
Overinflated tires may:
Rincrease th ebraking distance
Radversely affect handling
Rwear excessively and/or unevenly
Rhave an adverse effect on ride comfort
Rbe mores usceptible to damage
Maximumtirep ressures
:Example: maximum permissible tir epres-
sure
Never exceed th emaximum permissible tire
inflatio npressure. Always observe th erecom-
mended tir epressure for your vehicle when
adjustin gthe tirep ressure (
Ypage 290).
iThe actual values for tires are vehicle-spe-
cific and may deviat efromt hevalues in the
illustration.
Checking th etirep ressures
Important safety notes
Observe th enotes on tir epressure
(Ypage 290).
Information on air pressure for th etires on your
vehicle can be found:
Ron th evehicle's Tire and LoadingI nformation
placar dontheB-pillar
Rin th etirep ressure table in th efuel filler flap
(Ypage 139)
Rin th e"Tire pressure" section
Checking tir epressures manually
To determine and set th ecorrectt irep ressure,
proceed as follows:
XRemovet hevalve cap of th etiret hatistob e
checked.
XPresst hetirep ressure gauge securely onto
th ev alve.
XRead th etirep ressure and compare it to the
recommended value on th eTire and Loading
Information placar dorthetirep ressure table
(
Ypage 290).
XIf th etirep ressure is too low, increase th etire
pressure to th erecommended value.
XIf th etirep ressure is too high, releasea ir. To
do so, pressd own themetal pin in th evalve,
using th etip of apen for example. Then check
th et irep ressure again using th etirep ressure
checker.
XScrew th evalve cap ont othe valve.
XRepeat these steps for th eother tires.
Tirep ressurel oss warning system
(Canada only)
General notes
While th evehicle is in motion, th etirep ressure
loss warning system monitors th eset tir epres-
sure using th erotational speed of th ewheels.
This enables th esystem to detect significant
pressure loss in atire. If th espeed of rotation of
aw heel changes as aresult of aloss of pressure,
ac orresponding warning message will appear in
th em ultifunction display.
You can recognize th etirep ressure loss warning
by the Run Flat IndicatorA ctive Press
Tirep ressure293
Wheels and tires
Z

'OK'toRestartmessage in the multifunction
displayint heServ.menu. Information on the
message displayc an be found in the "Restarting
the tire pressure loss warning" section
(
Ypage 294).
Important safety notes
The tire pressure warning system does not warn
you of an incorrectly set tire pressure. Observe
the notes on the recommended tire pressure
(
Ypage 290).
The tire pressure loss warning does not replace
the need to regularly check the tire pressure. An
even loss of pressure on several tires at the
same time cannot be detected by the tire pres-
sure loss warning system.
The tire pressure monitor is not able to warn you
of as udden loss of pressure, e.g. if the tire is
penetrated by aforeign object. In the event of a
sudden loss of pressure, bring the vehicle to a
halt by braking carefully.A void abrupt steering
movements.
The function of the tire pressure loss warning
system is limited or delayed if:
Rsnow chains are mounted on your vehicle's
tires.
Rroad conditions are wintry.
Ryou are driving on sand or gravel.
Ryou adopt avery sporty driving style (corner-
ing at high speeds or driving with high rates of acceleration).
Ryou are driving with aheavy load (in the vehi-
cle or on the roof)
Restarting the tire pressure loss warn-
ing system
Restart the tire pressure loss warning system if you have:
Rchanged the tire pressure
Rchanged the wheels or tires
Rmounted new wheels or tires
XBefore restarting, make sure that the tire
pressures are set properly on all four tires for
the respective operating conditions.
The recommended tire pressure can be found
on the Tire and Loading Information placard
on the B-pillar. Additionally,at ire pressure
table is attached to the fuel filler flap. The tire
pressure loss warning system can only give
reliable warnings if you have set the correct tire pressure. If an incorrect tire pressure is
set, these incorrect valuesw
ill be monitored.
XAlso observe the notes in the section on tire
pressures (Ypage 290).
XMake sure that the SmartKey is in position 2
in the ignition lock (Ypage 122).
XPress =or; on the steering wheel to
select the Serv.menu.
XPress the9or: button to select
Tire Pressure.
XPress the abutton.
The Run Flat Indicator Active Press
'OK' to Restartmessage appears in the
multifunction display.
If you wish to confirm the restart:
XPress the abutton.
The Tire Pressure Now OK?message
appears in the multifunction display.
XPress the 9or: button to select Yes.
XPress theabutton.
The Run Flat Indicator Restartedmes-
sage appears in the multifunction display.
After ateach-in period, the tire pressure loss
warning system will monitor the set tire pres-
sures of all four tires.
If you wish to cancelt he restart:
XPress the%button.
or
XIf the Tire Pressure Now OK?message
appears, press the 9or: button to
select Cancel
.
XPress the abutton.
The tire pressure valuess tored at the last
restart will continue to be monitored.
Tire pressure monitor (Canada only)
General notes
If at ire pressure monitor is installed, the vehi-
cle's wheels have sensors that monitor the tire
pressures in all four tires. The tire pressure mon-
itor warns you if the pressure drops in one or
more of the tires. The tire pressure monitor only
functions if the corresponding sensors are
installed in all wheels.
Information on tire pressures is displayed in the
multifunction display. After afew minutes of
driving, the current tire pressure of each tire is
294Tire pressure
Wheels and tires