Wheels
Tyre pressure loss indicator
Control lamp
It lights up
The inflation pressure of one or more wheels is much
lower than the value set by the driver, or the tyre has
structural damage.
In addition, a audible warning sounds and a text mes-
sage is displayed on the instrument panel screen.
Stop the vehicle! Stop the vehicle safely as soon as
possible. Check all tyres and pressures. Replace any
damaged tyres.
Flashes
System fault
The control lamp flashes for approximately 1 minute
and then lights up permanently.
If the tyre is inflated correctly, switch the ignition off
and on again. Re-calibrate the tyre pressure loss indi-
cator
›››
page 337. If the fault continues, go to a speci-
alised workshop.
Several control and warning lamps light up
f
or a f
ew seconds when the ignition is switch-
ed on while the function is verified. They will
switch off after a few seconds.
WARNING
Observe the safety warnings
›››
in Con-
trol and w
arning lamps on page 79.
Tyre monitor system
Fig. 266
Instrument panel: warning of loss of tyre
pressure.
The tyre monitor indicator compares wheel
r
e
volutions and, with this information, the
tread of each wheel using the ABS sensors.
If the rolling circumference of one or more
wheels has changed, the tyre monitoring in-
dicator will indicate this on the instrument
panel through a warning lamp and a warning
to the driver
›››
Fig. 266. When only one
specific tyre is affected, its position within
the vehicle will be indicated.
Loss of pressure: Check left
tyre pressure!
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 monitoring indicator or it may not in-
dicate anything under certain circumstances
(e.g. sporty driving, snow-covered or un-
paved roads, or when driving with snow
chains).
Calibrating the tyre monitoring indicator
After changing the tyre pressure or replacing
one or more wheels, the tyre monitoring in-
dicator must be recalibrated. Do the same,
for example, when the front and rear wheels
are swapped.
●
Switch the ignition on.
●
Store the new tyre pressure in the Easy
Connect system with the button > SET-
TINGS > Tyres
›››
page 80 .
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.
»
337
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