Operation Manual

Overinflated tires may:
R
increase the braking distance
R
adversely affect handling
R
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 387).
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
Observe the notes on tire pressure
(
Y page 387).
Information on air pressure for the tires on your
vehicle can be found:
R
on the vehicle's Tire and Loading Information
placard on the B-pillar (
Y page 394)
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in the tire pressure table in the fuel filler flap
(
Y page 189)
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in the "Tire pressure" section
Checking tire pressures manually
To determine and set the correct tire pressure,
proceed as follows:
X
Remove the valve cap of the tire that is to be
checked.
X
Press the tire pressure gage 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 387).
X
If the tire pressure is too low, increase the tire
pressure to the recommended value.
X
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.
X
Screw the valve cap onto the valve.
X
Repeat these steps for the other tires.
Tire pressure monitor
General notes
If a tire 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 a few minutes of
driving, the current tire pressure of each tire is
shown in the Service
menu of the multifunction
display; see illustration (example).
For information on the message display, refer to
the "Checking the tire pressure electronically"
section (
Y page 392).
390
Tire pressure
Wheels and tires