Important notes on tire pressure
G
WARNING
If thetirepressuredrops repeatedly, the
wheel, valveortiremay be damaged. Tire
pressurethatistoo low may result in atire
blow-out.Thereisariskofanaccident.
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Checkthe tire for foreign objects.
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Checkwhether thewheelislosing air or
thevalveisleaking.
If you are unable to rectify thedamage, con-
tactaqualified specialist workshop.
G
WARNING
If you fit unsuitable accessories onto tire
valves, thetirevalves may be overloaded
and malfunction,whichcan causetirepres-
sureloss.Due to their design,retrofittedtire
pressuremonitors keep thetirevalveopen.
This can also result in tire pressureloss.
Thereisariskofanaccident.
Only screw thestandard valvecap or other
valvecapsapprovedbyMercedes-Benzfor
your vehicleontothe tire valve.
Use asuitable pressuregauge to checkthe
tire pressure. The outer appearanceofatire
does notpermit any reliable conclusionabout
thetirepressure. On vehicles equipped with
theelectronic tire pressuremonitor, thetire
pressurecan be checkedinthe on-board com-
puter.
The tire temperature and pressureincrease
when thevehicleisinmotion.This is depend-
entonthe driving speedand theload.
Therefore, you should only correcttirepres-
sures when thetires are cold.
The tires are cold:
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if thevehiclehas been parked withthe tires
out of direct sunlightfor at least three hours
and
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if thevehiclehas notbeen driven further
than 1mile (1.6km)
The tire temperature changes depending on
theoutside temperature, thevehiclespeed
and thetireload. If thetiretemperature
changes by 18 ‡(10 †), thetirepressure
changes by approximately 10 kPa(0.1bar/
1.5psi).Takethisintoaccountwhen checking
thepressureofwarm tires.Onlycorrect the
tire pressureifitistoo low for thecurrent
operating conditions. If you checkthe tire
pressurewhen thetires are warm,the result-
ing value will be higher than if thetires were
cold. This is normal. Do notreduce thetire
pressuretothe value specifiedfor cold tires.
The tire pressurewould otherwise be toolow.
Observethe recommended tire pressures for
cold tires:
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on theTireand Loading Information placard
on theB-pillar on thedriver'sside
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in thetirepressuretable on theinside of the
fuel filler flap
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printedinyellow on therim of theemer-
gency/collapsible sparewheel(depending
on vehicleequipment)
Underinflated or overinflated tires
Underinflated tires
G
WARNING
Tires withpressurethatistoo low can over-
heat and burstasaconsequence.Inaddi-
tion,theyalso suffer from excessiveand/or
irregular wear,whichcan severely impair the
braking properties and thedriving character-
istics.Thereisariskofanaccident.
Avoid tire pressures that are toolow in all
thetires,includingthe sparewheel.
Underinflated tires may:
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overheat, leadingtotiredefects
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adversely affecthandling
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wear excessively and/orunevenly
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haveanadverse effectonfuel consumption
Overinflated tires
G
WARNING
Tires withexcessively high pressurecan
burstbecause they are damaged moreeas-
ily by road debris, potholesetc.Inaddition,
they also suffer from irregular wear,which
can severely impair thebraking properties
and thedriving characteristics.Thereisa
riskofanaccident.
Tire pressure
273
Wheels and tires
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