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Important notes on tire inflation pres-
sure
G
Warning!
If the tire inflation pressure drops repeat-
edly, check the tires for punctures from
foreign objects and/or whether air is leak-
ing from the valves or from around the rim.
Tire temperature and tire inflation pressure
are also increased while driving, depending
on the driving speed and the tire load.
If you will be driving your vehicle at high
speeds of 100 mph (160 km/h) or higher,
where it is legal and conditions allow, consult
the tire inflation pressure label on the inside
of the fuel filler flap (if available) on how to
adjust the cold tire inflation pressure. If you
do not adjust the tire inflation pressure,
excessive heat can build up and result in sud-
den tire failure.
If your vehicle is not equipped with the tire
inflation pressure label on the inside of the
fuel filler flap, contact an authorized Mer-
cedes-Benz Center for proper tire inflation
pressure.
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Driving comfort may be reduced when the
tire inflation pressure is adjusted to the
value for speeds above 100 mph
(160 km/h) as specified on the tire inflation
pressure label located on the inside of the
fuel filler flap.
Make sure to readjust the tire inflation pres-
sure for normal driving speeds. You should
wait until the tires are cold before adjusting
the tire inflation pressure.
Some vehicles may have supplemental tire
inflation pressure information for vehicle
loads less than the maximum loaded vehicle
condition. If such information is provided, it
can be found on the tire inflation pressure
label located on the inside of the fuel filler flap
(Y page 221).
Tire inflation pressure changes by approxi-
mately 1.5 psi (0.1 bar) per 18‡ (10†) of air
temperature change. Keep this in mind when
checking tire inflation pressure where the
temperature is different from the outside
temperature.
Potential problems associated with
underinflated and overinflated tires
Underinflated tires
G
Warning!
Follow recommended tire inflation pres-
sures.
Do not underinflate tires. Underinflated
tires wear excessively and/or unevenly,
adversely affect handling and fuel econ-
omy, and are more likely to fail from being
overheated.
Underinflated tires can
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cause excessive and uneven tire wear
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adversely affect fuel economy
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lead to tire failure from being overheated
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adversely affect handling characteristics
Overinflated tires
G
Warning!
Follow recommended tire inflation pres-
sures.
Do not overinflate tires. Overinflated tires
can adversely affect handling and ride com-
fort, wear unevenly, increase stopping dis-
tance, and result in sudden deflation
(blowout) because they are more likely to
become punctured or damaged by road
debris, potholes etc.
Overinflated tires can
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adversely affect handling characteristics
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cause uneven tire wear
Operation