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328 Wheels and tires
Some tire pressure tables only show the rim diam-
eter instead of the complete tire size, e.g. R18.
The rim diameter is part of the tire size and can
be found on the tire side wall (
page 338).
/
Be sure to also observe the following further rela-
ted subjects:
Notes on tire pressure (
page 325)
/
R
Tire and Loading Information placard
R
(
page 331)
/
Maximum tire pressure (
page 337)
/
R
Checking the tire pressure manually
Read the tire pressure recommended for the
#
current operating conditions from the tire and
loading information placard or the tire pres-
sure table. Observe the notes on tire pressure.
Remove the valve cap of the tire to be
#
checked.
Press the tire pressure gauge securely onto
#
the valve.
Read the tire pressure.
#
If the tire pressure is lower than the recom-
#
mended value, increase the tire pressure to
the recommended value.
If the tire pressure is higher than the recom-
#
mended value, release air. To do so, press
down the metal pin in the valve, e.g. using the
tip of a pen. Then check the tire pressure
again using the tire pressure gauge.
Screw the valve cap onto the valve.
#
Further related subjects:
Notes on tire pressure (
page 325)
/
R
Tire pressure table (
page 327)
/
R
Tire and loading information placard
R
(
page 331)
/
Tire pressure monitoring system
▌Function of the tire pressure monitor
& DANGER Risk of accident due to incorrect
tire pressure
Each tire, including the spare (if provided),
should be checked monthly when cold and
inflated to the inflation pressure recommen-
ded by the vehicle manufacturer on the vehi-
cle placard or tire inflation pressure label. (If
your vehicle has tires of a different size than
the size indicated on the vehicle placard or
tire inflation pressure label, you should deter-
mine the proper tire inflation pressure for
those tires.)
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