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Practical tips
WARNING
Observe the safety warnings
›
››
in Con-
tr
ol and warning lamps on page 88.
Tyre pressure monitor indicator
Fig. 297 Centre console: tyre pressure loss in-
dicat
or button.
The tyre pressure monitor indicator compares
wheel r
evolutions and, with this information,
the tread of each wheel using the ABS sen-
sors.
The tyre pressure monitor indicator warns the
driver if it detects a considerable drop in tyre
pressure of one or several tyres while driving.
Loss of tyre pressure will be indicated by the
indicator as well as an audible warning
and sometimes a text message on the instru-
ment panel display.
Wheel tread change
The wheel diameter changes when:
●
Tyre pressure is changed manually.
●
Tyre pressure is insufficient.
●
The tyre structure is damaged.
●
The vehicle is unbalanced because of a
load.
●
The wheels on an axle are subject to a
heavier load (e.g. with a heavy load).
●
The vehicle is fitted with snow chains.
●
The temporary spare wheel is fitted.
●
The wheel on one axle is changed.
There may be a delay in the reaction of the
tyre pressure monitoring indicator or it may
not indicate anything under certain circum-
stances (e.g. sporty driving, snow-covered or
unpaved roads, or when driving with snow
chains).
Calibrate the tyre pressure monitoring in-
dicator
After changing the tyre pressure or replacing
one or more wheels, the tyre pressure moni-
toring indicator must be recalibrated. Do the
same, for example, when the front and rear
wheels are swapped.
●
Switch the ignition on.
●
Press and hold down the
›››
Fig. 297
button until an audible signal is heard.
When driving, the system self-calibrates the
tyre pressure provided by the driver and the
wheels fitted. After a long journey with varied
speeds the programmed values are collected
and monitored.
With the wheels under very heavy loads, the
tyre pressure must be increased to the total
recommended tyre pressure before calibra-
tion
›››
Fig. 294.
If the tyre monitor system button is pressed
down, the new tyre pressures are confirmed.
WARNING
When the tyres are inflated at different
pr
essures or at a pressure that is too low
then a tyre may be damaged resulting in a
loss of control of the vehicle and a serious
or fatal accident.
●
If the lamp lights up, reduce speed im-
mediately and avoid any sudden turning or
braking manoeuvre. Stop when possible,
and check the tyre pressure and status.
●
The tyre monitoring system can only op-
erate correctly if all of the tyres are infla-
ted to the correct pressure when cold.
●
If a tyre has not been punctured and it
does not have to be changed immediately,
drive to the nearest specialised workshop
at a moderate speed and have the tyre
checked and inflated to the correct pres-
sure.
334
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