Tire Pressure Monitor; Checking Tire Pressures Manually - Mercedes-Benz C-Class Operator's Manual

Checking tire pressures manually

To determine and set the correct tire pres-
sure, proceed as follows:
Remove the valve cap of the tire that is to
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be checked.
Press the tire pressure gauge securely onto
X
the valve.
Read the tire pressure and compare it with
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the recommended value on the Tire and
Loading Information placard (
If the tire pressure is too low, increase it to
X
the recommended value.
If the tire pressure is too high, release air by
X
pressing down the metal pin in the valve.
Use the tip of a pen, for example. Then,
check the tire pressure again using the tire
pressure gauge.
Screw the valve cap onto the valve.
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Repeat these steps for the other tires.
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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 pres-
sure monitor warns you if the pressure drops
in one or more of the tires. The tire pressure
monitor only functions if the correct sensors
are installed on 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 Service
tifunction display; see illustration (example).
page 361).
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For information on the message display, refer
to the "Checking the tire pressure electroni-
cally" section (
Important safety notes
G
Each tire, including the spare (if provided),
should be checked at least once every two
weeks when cold and inflated to the pressure
recommended by the vehicle manufacturer
on the Tire and Loading Information placard
on the driver's door B-pillar or the tire pres-
sure label on the inside of the fuel filler flap. If
your vehicle has tires of a different size than
the size indicated on the Tire and Loading
Information placard or, if available, the tire
pressure label, you should determine the
proper tire pressure for those tires.
As an added safety feature, your vehicle has
been equipped with a tire pressure monitoring
system (TPMS) that illuminates a low tire pres-
sure telltale when one or more of your tires
are significantly underinflated. Accordingly,
when the low tire pressure telltale lights up,
you should stop and check your tires as soon
menu of the mul-
as possible, and inflate them to the proper
pressure. Driving on a significantly underin-
flated tire causes the tire to overheat and can
lead to tire failure.
Underinflation also reduces fuel efficiency
and tire tread life, and may affect the vehicle's
handling and stopping ability. Please note that
the TPMS is not a substitute for proper tire
maintenance, and it is the driver's responsi-
bility to maintain correct tire pressure, even if
page 367).
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WARNING
Check
365
Z