Restart the tire pressure monitor, Wheels and tires, Tire pressure – Mercedes-Benz S-Class 2012 User Manual

Page 501

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1. This device may not cause harmful
interference, and
2. this device must accept any interference
received, including interference that may
cause undesired operation.
Any unauthorized modification to this
device could void the user’s authority to
operate the equipment.

Checking tire pressure electronically

X

Make sure that the SmartKey is in position
2 (

Y

page 303) in the ignition lock.

X

Press the = or ; button on the
steering wheel to select the

Service

menu.

X

Press the 9 or : button to select

Tire Pressure

.

X

Press the a button.
The current tire pressure for each wheel will
be displayed in the multifunction display.

If the vehicle has been parked for longer than
20 minutes, the

Tire Pressures

Displayed After Driving A Few

Minutes

message appears in the display.

After a teach-in period, the tire pressure
monitor automatically recognizes new wheels
or new sensors. If a clear allocation of the tire
pressure values to the individual wheels is not
possible, the

Tire Pressure Monitor

Active

message is shown instead of the tire

pressure display. The tire pressures are
already being monitored.

i

If a spare wheel/emergency spare wheel

is mounted, the system may continue to
show the tire pressure of the wheel that has
been removed for a few minutes. If this
occurs, note that the value displayed for
the position where the spare tire is
mounted is not the same as the spare
wheel/emergency spare wheel's current
tire pressure.

Tire pressure monitor warning

messages

If the tire pressure monitor detects a
significant pressure loss on one or more tires,
a warning message is shown in the
multifunction display. A warning tone also
sounds and the tire pressure warning lamp
lights up in the instrument cluster.
Each tire that is affected by a significant loss
of pressure is highlighted with a color.
If the

Correct Tire Pressure

message

appears in the multifunction display:

X

Check the tire pressure on all four wheels
and correct it if necessary.

i

If the wheel positions on the vehicle are

interchanged, the tire pressures may be
displayed for the wrong positions for a
short time. This is rectified after a few
minutes of driving, and the tire pressures
are displayed for the correct positions.

Restarting the tire pressure monitor

G

WARNING

It is the driver's responsibility to set the tire
pressure to the recommended cold tire
pressure. Underinflated tires affect the ability
to steer or brake the vehicle. You might lose
control over the vehicle.

When you restart the tire pressure monitor,
all existing warning messages are deleted and
the warning lamps go out. The monitor uses
the currently set tire pressures as the
reference values for monitoring.
The tire pressure monitor must be restarted
when you set the tire pressure to a new value
(as a result of changed drive or load
characteristics, for example). The tire
pressure monitor then monitors the new tire
pressure values.

i

Canada only: in most cases, the tire

pressure monitor recognizes the new
reference values automatically. However,

Tire pressure

499

Wheels and tires

Z

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