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Operation
●
If the warnin
g lamp lights up, stop im-
mediately and check the tyres.
●
If the tyres are inflated at different pres-
sures or if a tyre pressure is too low, this will
increase tyre wear, negatively affecting vehi-
cle stability and increasing braking distan-
ces.
●
If tyres are inflated at different pressures or
a tyre pressure is too low, a tyre may be dam-
aged and burst resulting in a loss of control
of the vehicle.
●
The driver is responsible for ensuring that
all of the vehicle tyres are correctly inflated
to the right pressure. The recommended tyre
pressure is indicated on the label ››› Fig. 252.
●
The tyre monitoring system can only oper-
ate correctly if all of the tyres are inflated to
the correct pressure when cold.
●
Driving with tyres at the wrong pressure
can damage them and result in an accident.
Ensure that the tyre pressures of all the tyres
correspond to the vehicle load.
●
Before starting a journey, always inflate
tyres to the correct pressure.
●
If tyre pressure is too low then the tyre is
subject to greater forces and it may be heated
to such an extent that the tread can rupture
and the tyre will burst.
●
With an overloaded vehicle at high speed,
the tyres can overheat and burst resulting in
a loss of vehicle control.
●
Tyre pressures which are too high or too
low reduce the useful life of the tyre, affect-
ing vehicle performance.
●
If a tyr
e has not been “punctured” and does
not have to be changed immediately, drive to
the nearest specialised workshop at a moder-
ate speed and have the tyre checked and in-
flated to the correct pressure.
Tyre monitoring indicator
Fig. 229 Detailed view of the centre console:
b
utt
on f
or the tyre pressure monitoring indi-
cator
The tyre monitor indicator compares wheel
r
ev
o
lutions and, with this information, the
tread of each wheel using the ABS sensors. If
the tread of a wheel is changed, the tyre
monitoring indicator will indicate as such on
the instrument panel. The wheel tread
changes when:
●
Tyre pressure is insufficient
●
Tyre structure is damaged
●
The vehicle is unbalanced because of a
load
●
If the wheels on an axle are subject to a
heavier load (e.g. when towing a trailer).
●
The vehicle is fitted with snow chains
●
The wheel on one axle is changed
There may be a delay in the reaction of the
tyre monitoring indicator or it may not in-
dicate anything under certain circumstances
(e.g. sports driving, snow-covered or un-
paved roads).
Adaptation of the tyre monitoring indicator
On adjusting tyre pressure or changing one
or more wheels, the ››› Fig. 229 button on the
tyre monitoring indicator must be kept press-
ed down, with the ignition on, until an audi-
ble warning is heard. Do the same, for exam-
ple, when the front and rear wheels are swap-
ped ››› Fig. 251.
If the wheels are subjected to an excessive
load (towing a trailer, heavy load), the tyre
pressure must be increased to the maximum
recommended pressure ››› page 287. Press
the tyre monitoring indicator button to con-
firm the new pressure value.
Note
An incorrect warning may be given when
snow c
hains are in use because the chains in-
crease the tread of the wheel.
236
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