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Tyre pressure monitor
General notes
If
a tyre pressure monitor system is fitted,
the vehicle 's wheels have sensors fitted
that monitor the tyre pressures in all four
tyres. The tyre pressure monitor warns you
if the pressure drops in one or more of the
tyres. The tyre pressure monitor only func-
tions if the corresponding sensors are fit-
ted to all wheels .
Important safety notes
It is the driver 's responsibility to set the
tyre pressure to the recommended cold tyre
pressure suitable for the operating situa-
tion
(I>
page 225). Note that the correct tyre
pressure for the current operating situa-
tion must first be taught-in to the tyre
pressure monitor.
If
there is a substantial
loss of pressure , the warning threshold for
the warning message is aligned to the ref-
erence values taught-in. Restart the tyre
pressure monitor after adjusting to the
cold tyre pressure. The current pressures
are saved as new reference values. This
will ensure that a warning message will
only appear if the tyre pressure drops sig-
nificantly.
The tyre pressure monitor does not warn you
of an incorrectly set tyre pressure .
Observe the notes on the recommended tyre
pressure (
1>
page 225).
The tyre pressure monitor is not able to
warn you of a sudden loss of pressure, e.g.
if the tyre is penetrated by a foreign
object. In the event of a sudden loss of
pressure, bring the vehicle to a halt by
braking carefully. Avoid abrupt steering
manoeuvres.
Tyre pressure
The tyre pressure monitor has a yellow
warning lamp in the instrument cluster for
indicating a pressure loss or malfunction.
Depending on how the warning lamp flashes
or lights up , a tyre pressure that is too low
or a malfunction in the tyre pressure mon-
itor is indicated:
• if
the warning lamp is lit continuously,
the tyre pressure on one or more tyres is
significantly too low. The tyre pressure
monitor is not malfunctioning.
• if the warning lamp flashes for around a
minute and then remains lit constantly,
the tyre pressure monitor is malfunc-
tioning.
0
On-board computer with colour dis-
play: In addition to the warning lamp, a
message appears in the display.
Observe the information on display mes-
sages (
1>
page 163).
If
the tyre pressure monitor is malfunc-
tioning, it may take up to ten minutes for
the tyre pressure warning lamp to inform
you of the malfunction. The malfunction
will be indicated first by the tyre pressure
warning lamp flashing for approximately
one minute and then remaining lit. When
the fault has been rectified, the tyre pres-
sure warning lamp goes out after you have
driven for a few minutes.
The operation of the tyre pressure monitor
can be affected by interference from radio
transmitting equipment (e.g. cordless
headphones, two-way radios) that may be
being operated in or near the vehicle.
Tyre pressure monitor warning (on-
board computer with monochrome dis-
play)
If
the tyre pressure monitor detects a pres-
sure loss in one or more tyres, the yellow
warning light in the tyre pressure monitor
lights up.
If
the tyre pressure in one or
more tyres suddenly sinks, a warning tone
also sounds.
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