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wear excessively and/or unevenly
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have an adverse effect on fuel consumption
Overinflated tires
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WARNING
Tires with excessively high pressure can burst
because they are damaged more easily by
road debris, potholes etc. In addition, they
also suffer from irregular wear, which can
severely impair the braking properties and the
driving characteristics. There is a risk of an
accident.
Avoid tire pressures that are too high in all the
tires, including the spare wheel.
Overinflated tires may:
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increase the braking distance
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adversely affect handling
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wear excessively and/or unevenly
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have an adverse effect on ride comfort
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be more susceptible to damage
Maximum tire pressures
:
Example: maximum permissible tire pres-
sure
Never exceed the maximum permissible tire
inflation pressure. Always observe the recom-
mended tire pressure for your vehicle when
adjusting the tire pressure (Y page 293).
i
The actual values for tires are vehicle-spe-
cific and may deviate from the values in the
illustration.
Checking the tire pressures
Important safety notes
The tire pressure monitor does not warn you of:
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incorrectly set tire pressure
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sudden loss of tire pressure, e.g. from a for-
eign object that has penetrated the tire
Observe the notes on tire pressure
(Y page 293).
Information on air pressure for the tires on your
vehicle can be found:
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on the vehicle's Tire and Loading Information
placard on the B-pillar
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in the tire pressure table in the fuel filler flap
(Y page 141)
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in the "Tire pressure" section
Checking tire pressures manually
To determine and set the correct tire pressure,
proceed as follows:
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Remove the valve cap of the tire that is to be
checked.
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Press the tire pressure gauge securely onto
the valve.
X
Read the tire pressure and compare it to the
recommended value on the Tire and Loading
Information placard or the tire pressure table
(Y page 293).
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If the tire pressure is too low, increase the tire
pressure to the recommended value.
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If the tire pressure is too high, release air. To
do so, press down the metal pin in the valve,
using the tip of a pen for example. Then check
the tire pressure again using the tire pressure
checker.
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Screw the valve cap onto the valve.
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Repeat these steps for the other tires.
Tire pressure loss warning system
(Canada only)
General notes
While the vehicle is in motion, the tire pressure
loss warning system monitors the set tire pres-
sure using the rotational speed of the wheels.
This enables the system to detect significant
pressure loss in a tire. If the speed of rotation of
a wheel changes as a result of a loss of pressure,
296
Tire pressure
Wheels and tires
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